Relevant bibliographies by topics / Seismic

Academic literature on the topic 'Seismic'

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Published: 4 June 2021
Last updated: 11 September 2023

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Journal articles on the topic "Seismic"

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Subarsyah, Subarsyah, and Yulinar Firdaus. "PERBAIKAN CITRA PENAMPANG SEISMIK MENGGUNAKAN METODE COMMON REFLECTION SURFACE : APLIKASI TERHADAP DATA SEISMIK PERAIRAN WAIGEO." JURNAL GEOLOGI KELAUTAN 13, no. 2 (February 16, 2016): 119. http://dx.doi.org/10.32693/jgk.13.2.2015.267.

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Kenampakan struktur geologi dan kontinuitas reflektor pada penampang seismik seringkali tidak teridentifikasi ketika data seismik di stack menggunakan metode stacking konvensional, terutama untuk data dengan jumlah fold coverage yang kecil. Data seismik Puslitbang Geologi Kelautan yang diperoleh pada Mei 2015, di Perairan Timur Pulau Waigeo, memiliki fold coverage yang relatif rendah sekitar 20. Untuk meningkatkan kualitas penampang seismik pada data ini perlu diterapkan metode Common Reflection Surface(CRS) sehingga interpretasi struktur geologi lebih mudah dan kontinuitas reflektor lebih baik. Metode ini diaplikasikan terhadap data seismik lintasan 6 dan 37. Penerapan metode CRS memberikan perbaikan pada citra penampang seismik terutama pada bagian basement akustik dan kontinuitas reflektor. Metode ini memberikan citra penampang seismik yang relatif lebih baik dibandingkan metode stacking konvensional karena metode CRS melibatkan trace seismik dari CDP di sekitarnya sesuai dengan besar parameter aperturnya. Kata kunci CRS Stack, CRS Attribut dan Paraxial Geological structure and reflector continuity on seismic section are often not clearly identified when the seismic data stacked use conventional stacking, especially seismic data with small fold coverage. Seismics data of Puslitbang Geologi Kelautan, that have been acquired on Mei 2015,in eastern part of Waigeo Island, have small number of fold coverage about 20. To enhance quality of seismic section on this data, it is necessary to apply Common Reflection Surface (CRS) method, in order to make geological structure interpretation easier dan better reflector continuity. This method applied to seismic data line 6 and 37. This application gives enhancement to seismic section especially at acoustic basement and reflector continuity. CRS method gives better seismic section than conventional stacking due to stacking process that involve seismic trace around the CDP along its aperture size. Keywords: CRS Stack, CRS Attribut and Paraxial
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Sarkar, Subir, Adrita Choudhuri, Santanu Banerjee, A. J. (Tom) Van Loon, and Pradip K. Bose. "Seismic and non-seismic soft-sediment deformation structures in the Proterozoic Bhander Limestone, central India." Geologos 20, no. 2 (July 8, 2014): 89–103. http://dx.doi.org/10.2478/logos-2014-0008.

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Abstract Numerous soft-sediment deformation structures occur within the Proterozoic Bhander Limestone of an intracratonic sag basin in a 750 m long section along the Thomas River, near Maihar, central India. Part of these deformation structures have most probably a non-seismic origin, but other structures are interpreted as resulting from earthquake-induced shocks. These seismic structures are concentrated in a 60 cm thick interval, which is interpreted as three stacked seismi-tes. These three seismites are traceable over the entire length of the section. They divide the sedimentary succession in a lower part (including the seismites) deposited in a hypersaline lagoon, and an upper open-marine (shelf) part. Most of the soft-sediment deformations outside the seismite interval occur in a lagoonal intraclastic and muddy facies association. The SSDS within the seismite interval show a lateral continuity. They record simultaneous fluidisation and liquefaction. The bases of each of the three composing seismite bands are defined by small-scale shear folds, probably recording an earthquake and aftershocks. The presence of the three seismite bands at the boundary between the lagoonal and the overlying open-marine oolitic facies association suggests that the seismic event also triggered basin subsidence.
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Puspasari, Trevi Jayanti, and Sumirah Sumirah. "APLIKASI METODE PSEUDO 3D SEISMIK DI CEKUNGAN JAWA BARAT UTARA MENGGUNAKAN K.R. BARUNA JAYA II." Oseanika 1, no. 2 (January 14, 2021): 1–12. http://dx.doi.org/10.29122/oseanika.v1i2.4562.

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ABSTRAK Tuntutan untuk mengikuti perkembangan kebutuhan industri migas menjadi motivasi dalam mengembangkan teknik penerapan dan aplikasi akuisisi seismik multichannel 2D. Perkembangan kebutuhan eksplorasi industri migas tidak diimbangi dengan anggaran peningkatan alat survei seismik milik negara termasuk yang terpasang di K.R. Baruna Jaya II – BPPT. Penerapan metode pseudo 3D pada disain survei dan pengolahan data dapat menjadi solusi efektif dan efisien dalam mengatasi persoalan tersebut. Metode Pseudo 3D merupakan suatu teknik akuisisi dan pengolahan data dengan menitik beratkan pada disain akuisisi dan inovasi pengolahan data seismik 2D menghasilkan penampang keruangan (3D) berdasarkan input data seismik yang hanya 2D. Penelitian ini bertujuan untuk mengaplikasikan metode pseudo 3D seismik di Cekungan Jawa Barat Utara menggunakan wahana KR. Baruna Jaya II yang dilakukan pada Desember 2009. Sebagai hasil, pengolahan data 2D lanjutan telah dilakukan dan diperoleh profil penampang seismik keruangan (3D). Profil hasil pengolahan data Pseudo 3D ini dapat menjadi acuan dalam pengambilan keputusan dan rencana survei berikutnya. Kata Kunci: Seismik Pseudo 3D, Seismik multichannel 2D, K.R. Baruna Jaya II, Cekungan Jawa Barat Utara. ABSTRACT [Aplication of Seismic Pseudo 3D in Nort West Java Basin Using K.R. Baruna Jaya II] The demand to follow the growth of needs in the oil and gas industry is a motivation in the developing of techniques for assessment and applying 2D multichannel seismic acquisition. The development of exploration needs for the oil and gas industry is not matched by budget for an upgrade Government’s seismic equipment including equipment installed in K.R. Baruna Jaya II. Applied Pseudo 3D method in survey and seismic data processing can be an effective and efficient solution. The pseudo 3D method is a data acquisition and processing technique with an emphasis on the acquisition design and 2D seismic data processing innovation to produce a 3D seismic volume. This study aims to apply the pseudo 3D seismic method in the North West Java Basin using the K.R. Baruna Jaya II which was held in Desember 2009. As a Result, advanced seismic processing was carried out to output a seismic volume (3D) profile. This profile can be used as a reference in making decisions and planning the next survey. Keywords: Pseudo 3D Seismic, Seismic 2D multichannel, K.R. Baruna Jaya II, Nort West Java Basin.
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By, T. L. "Crosshole seismics and seismic tomography." Geoexploration 24, no. 3 (October 1987): 275–76. http://dx.doi.org/10.1016/0016-7142(87)90072-x.

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Sari, Anggun Mayang, and Afnindar Fakhrurrozi. "SEISMIC HAZARD MICROZONATION BASED ON PROBABILITY SEISMIC HAZARD ANALYSIS IN BANDUNG BASIN." RISET Geologi dan Pertambangan 30, no. 2 (December 30, 2020): 215. http://dx.doi.org/10.14203/risetgeotam2020.v30.1138.

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The geological and seismic-tectonic setting in the Bandung Basin area proliferates the seismicity risk. Thus, it is necessary to investigate the seismic hazards caused by the foremost seismic source that affects the ground motions in the bedrock. This research employed Probability Seismic Hazard Analysis (PSHA) method to determine the peak ground acceleration value. It considers the source of the earthquakes in the radius of 500 km with a return period of 2500 years. The analysis results showed that the Peak Ground Acceleration (PGA) in this region varies from 0.46 g to 0.70 g. It correlates with the magnitude and hypocentre of the dominant earthquake source of the study locations. The PGA value on the bedrock was used as an input to develop the seismic hazard microzonation map. It was composed using the Geographic Information System (GIS) to visualise the result. This research provides a scientific foundation for constructing residential buildings and infrastructure, particularly as earthquake loads in the building structure design calculations. ABSTRACT - Mikrozonasi Bahaya Seismik Berdasarkan Probability Seismic Hazard Analysis di Cekungan Bandung. Kondisi geologi dan seismik-tektonik di Cekungan Bandung meningkatkan risiko kegempaan di wilayah tersebut. Oleh karena itu, perlu dilakukan penelitian tentang bahaya seismik yang disebabkan oleh sumber-sumber gempa di sekitarnya yang mempengaruhi gelombang gempa di batuan dasar. Penelitian ini menggunakan metode Probability Seismic Hazard Analysis (PSHA) untuk menentukan nilai percepatan gelombang gempa di batuan dasar. Lebih lanjut penelitian ini menggunakan sumber gempa dalam radius 500 km dengan periode perulangan 2500 tahun. Hasil analisis menunjukkan bahwa Peak Ground Acceleration (PGA) di wilayah ini bervariasi dari 0,46 g hingga 0,70 g. Hal ini berkorelasi dengan magnitudo dan jarak hiposenter sumber gempa dominan terhadap lokasi penelitian. Nilai PGA di batuan dasar digunakan sebagai input data dalam pembuatan peta mikrozonasi bahaya seismik. Peta mikrozonasi bahaya seismik disusun dan divisualisasikan menggunakan Sistem Informasi Geografis (SIG). Luaran penelitian ini menghasilkan landasan ilmiah pada konstruksi bangunan tempat tinggal dan infrastruktur, khususnya sebagai pembebanan gempa dalam perhitungan desain struktur bangunan.
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Kamiludin, Udaya, I. Nyoman Astawa, and Moch Akrom Mustafa. "INDIKASI KETERDAPATAN ENDAPAN PLASER PEMBAWA TIMAH DAN UNSUR TANAH JARANG (REE), DI PERAIRAN TODAK, SINGKEP, KEPULAUAN RIAU." JURNAL GEOLOGI KELAUTAN 13, no. 2 (February 16, 2016): 109. http://dx.doi.org/10.32693/jgk.13.2.2015.266.

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Penelitian geofisika di Perairan Todak, Singkep, Kepulauan Riau menggunakan seperangkat peralatan seismik pantul dangkal saluran tunggal. Tujuan penelitian ini adalah untuk menunjang penelitian keterdapatan endapan plaser pembawa timah dan unsur tanah jarang (REE). Hasil interpretasi rekaman seismik diperoleh terdapatnya lembah/mangkuk yang terbentuk secara alami akibat adanya terobosan batuan granit, di mana lembah/mangkuk-mangkuk ini merupakan tempat terjadinya sedimentasi dari hasil pelapukan batuan di sekitarnya. Hasil interpretasi rekaman seismik pantul saluran tunggal analog di perairan Todak, Singkep, dapat diklasifikasikan menjadi 3 runtunan yaitu runtunan A, B, dan runtunan C.Kata kunci Data seismik, endapan plaser, lembah/mangkuk, Perairan Todak. Geophysical research at Todak, Singkep, Riau Archipelago Province, by using single channel sahllow seismic refletion. The purpose of research is to support placer deposit bearing tin and rare earth element research at this area. From seismic interpretation can be recognized the distribution of valley/bowls which is naturally formed, caused by granite rock intrusion. Those valleys are sedimentation places of wheathered rock from the surrounding area. Beside that, the seismic research also for determining the placer deposit thickness. Interpratation of analog single channel seismic records in the Todak waters, Singkep, result 3 seismic sequences and intrusive feature, A sequences, B, and C. Keywords: Seismic data, placer deposit, valley/basin, Todak Watres.
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Maiti, Bikas. "Seismic Pressure and Seismic Bearing Capacity of Foundations." International Journal of Psychosocial Rehabilitation 24, no. 5 (May 30, 2020): 7297–303. http://dx.doi.org/10.37200/ijpr/v24i5/pr2020762.

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Sidiq, Aditya P., Henry M. Manik, and Tumpal B. Nainggolan. "STUDI KOMPARASI METODE MIGRASI SEISMIK DALAM MENGKARAKTERISASI RESERVOIR MIGAS DI BLOK KANGEAN, LAUT BALI MENGGUNAKAN INVERSI IMPEDANSI AKUSTIK BERBASIS MODEL." Jurnal Ilmu dan Teknologi Kelautan Tropis 11, no. 1 (April 1, 2019): 205–19. http://dx.doi.org/10.29244/jitkt.v11i1.23028.

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ABSTRAK Karakterisasi reservoir menjadi penting dalam tahapan eksplorasi minyak dan gas bumi. Salah satu hal yang dibutuhkan untuk mencapai keakuratan dalam mengkarakterisasi reservoir adalah penampang seismik yang sesuai dengan penampang aslinya. Struktur lapisan bumi yang kompleks mengakibatkan gelombang terdifraksi, sehingga penampang seismik mengalami pembelokan dari posisi sebenarnya. Penelitian ini menerapkan metode migrasi seismik Kirchhoff dan Stolt (F-K) untuk mengembalikan posisi reflektor pada waktu dan kedalaman yang sebenarnya pada data seismik 2D di Perairan Utara Bali. Data seismik diintegrasikan dengan data sumur APS-1 sebagai kontrol untuk diinversikan dengan teknik inversi berbasis model sehingga dapat mengkarakterisasi reservoir. Penelitian ini bertujuan membandingkan hasil migrasi seismik yaitu migrasi Stolt dan migrasi Kirchhoff untuk diinversikan menggunakan metode inversi berbasis model sehingga dapat diketahui sejauh mana kualitas data seismik mempengaruhi proses karakterisasi reservoir. Nilai korelasi dari hasil analisis regresi antara log impedansi inversi dengan log impedansi data sumur pada migrasi Kirchhoff sebesar 0,739 dan galat regresi sebesar 873,54, sedangkan pada migrasi Stolt memiliki nilai korelasi sebesar 0,698 dan nilai galat sebesar 1236,17. Hal ini menunjukkan bahwa migrasi Kirchhoff lebih baik dari migrasi Stolt baik secara kualitatif maupun kuantitatif dalam mengkarakterisasi reservoir hidrokarbon. ABSTRACTReservoir characterization is an important method in gas and oil exploration. In order to obtain accuracy for defining reservoir, required seismic image that similar to the actual seismic image. The complexity of earth structure could cause diffracted waves, therefore, seismic image was diffracted from its actual position. This study applies Kirchhoff and Stolt (F-K) seismic migration methods to restore the position of the reflector at the actual time and depth seismic data in North Bali. Seismic data is integrated with APS-1 well data as controls to be converted with model-based inversion techniques so as to characterize the reservoir. This study aims to compare the results of seismic migration namely Stolt and Kirchhoff migration to be converted using a model-based inversion method so that it can be seen to what extent the quality of seismic data influences the reservoir characterization process. Correlation value from the results of regression analysis between inversion log impedance and well impedance log data in Kirchhoff migration is 0.739 and regression error is 873.54, while the Stolt migration has a correlation value of 0.698 and an error value of 1236.17. This shows that Kirchhoff's migration is better than Stolt migration both qualitatively and quantitatively in characterizing hydrocarbon reservoirs.
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Heidebrecht, A. C., and N. Naumoski. "Evaluation of site-specific seismic design requirements for three Canadian cities." Canadian Journal of Civil Engineering 15, no. 3 (June 1, 1988): 409–23. http://dx.doi.org/10.1139/l88-056.

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Siesmic design requirements as specified in building codes normally use a generic approach in which the seismic response is independent of the site location, except for a single intensity-related parameter used to define the severity of the expected ground motion. In reality, the characteristics of earthquakes that influence structural response depend on both the level of seismic motion and the seismo-tectonic environment at the specific location. This paper describes a methodology for determining seismic design requirements that uses both magnitude (M) and epicentral distance (R) to define the seismo-tectonic environment. Ensembles of actual seismic strong motion records are selected to match the combinations of M and R that dominate the seismic risk at a specific location. These time histories are used to determine both response spectra and seismic response factors (as used in the 1985 edition of the National Building Code, NBCC 1985) for the location in question. This paper applies this methodology to Vancouver, Ottawa, and Quebec City and compares the results with the response spectra and seismic response factors specified in NBCC 1985. The results indicate that a site-specific investigation of seismic design requirements is important in distinguishing between locations having different seismo-tectonic environments. Key words: structures, design, seismic, code, dynamic, acceleration, velocity, spectra, magnitude, epicentral distance.
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Nainggolan, Tumpal Benhard, and Subarsyah Subarsyah. "SUPPRESSING DIFFRACTION EFFECT USING KIRCHHOFF PRE-STACK TIME MIGRATION ON 2D SEISMIC MULTICHANNEL DATA AT FLORES SEA." BULLETIN OF THE MARINE GEOLOGY 29, no. 2 (February 15, 2016): 71. http://dx.doi.org/10.32693/bomg.29.2.2014.67.

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2D seismic multichannel survey has been carried out by Marine Geological Institute of Indonesia to interpret imaging and sub-surface geological information in the Flores Sea. Seismic data processing starts from pre-processing until migration stage. Migration is an important stage in the seismic processing, because at this stage the effects of diffraction and oblique reflectors caused by fault, salt domes, wedging, etc. will be repositioned to the actual points. One example of diffraction effects can be seen on the seismic section of a conventional stacking that have not migrated, i.e. resulting in an apparent bowtie reflector. Geologists find difficulties in interpreting geological information from diffracted seismic section, so it needs further processing to overcome the effects. By using Kirchhoff method and carried out during the Pre-Stack Time Migration (PSTM), this method turns out to produce migrated seismic section which is much better than conventional stacked one. This is due to the Kirchhoff method suppressed the identified diffraction effects, so that the geologist can interpret geological structure of the resulting migrated seismic section of the Flores Sea. Keywords : 2D seismic multichannel, diffraction, Pre-Stack Time Migration (PSTM), Kirchhoff method. A Survei seismik 2D multichannel dilaksanakan oleh Marine Geological Institute of Indonesia untuk mengetahui gambaran serta informasi geologi bawah permukaan Laut Flores. Pengolahan data seismik dimulai dari pre-processing sampai tahap migration. Tahap migration merupakan tahap terpenting dalam pengolahan data seismik, oleh karena pada tahap ini efek difraksi dan reflektor miring yang diakibatkan oleh sesar, kubah garam, pembajian, dan lain-lain akan dikembalikan pada keadaan sebenarnya. Salah satu contoh adanya efek difraksi bisa dilihat pada penampang stacking konvensional yaitu “bowtie” yang mengakibatkan terjadinya reflektor semu pada penampang seismik. Efek difraksi “bowtie” sangat menyulitkan para peneliti dalam memperoleh informasi geologi, sehingga perlu adanya proses lebih lanjut untuk mengatasi efek tersebut. Salah satu metode migrasi yang berkembang saat ini yaitu metode Kirchhoff dan dilakukan pada saat Pre-Stack Time Migration (PSTM), menunjukkan hasil penampang jauh lebih baik daripada penampang stacking konvensional. Hal ini terjadi karena pada metode Kirchhoff Pre-Stack Time Migration, efek difraksi tersebut ditekan lebih awal sehingga penampang yang dihasilkan mampu menggambarkan struktur geologi permukaan Laut Flores Sea. Kata kunci : seismik 2D multikanal, difraksi, Pre-Stack Time Migration (PSTM), metode Kirchhoff.
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Dissertations / Theses on the topic "Seismic"

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Marks, Samantha Georgina. "Seismic wave attenuation from vertical seismic profiles." Thesis, University of Reading, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.384872.

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Vice, President Research Office of the. "Seismic Shift." Office of the Vice President Research, The University of British Columbia, 2006. http://hdl.handle.net/2429/2662.

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Tatelman, Anna. "Seismic Communication." ScholarWorks@UNO, 2019. https://scholarworks.uno.edu/td/2707.

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Adiya, Munkhsaikhan. "Seismic activity near Ulannbaatar : implication for seismic hazard assessment." Thesis, Strasbourg, 2016. http://www.theses.fr/2016STRAH007/document.

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On observe depuis 2005 une sismicité intense à 10 km d'Oulan Bator ce qui a permis d'identifier une faille active, Emeelt, sur le terrain. Après le calcule d'un modèle de vitesse 3D, j'ai appliqué la tomographie double différence pour obtenir une localisation précise des séismes. Ils marquent au moins trois branches parallèles orientées N147° comme la faille vue en surface. L'activité sur la faille principale d'Emeelt (MEF) s’étend sur 15 km, les branches Ouest et Est, moins actives, sur 10 km. La profondeur de l'activité s'étend entre 4 et 15 km. L'activité sismique semble concentrée à l'intersection avec des failles Mésozoïques et les contrastes Vs/Vs suggèrent la présence de fluides. Les 10 essaims identifiés montrent une activité croissante et une migration spatiale avec le temps. Le calcul de 2 scénarios possibles, un M ~ 6.4 et un M ~ 7, indique un important impact sur la ville d'Oulan Bator, avec une intensité minimum de VIII et localement IX pour M=6.4 et X pour M=7
We observe since 2005 a high seismic activity at 10 km from Ulaanbaatar that allowed us to identify a new active fault, Emeelt, in the field. After computing a 3D velocity model, I applied Double-Difference tomography to obtain a precise localization of earthquakes. They trace at least three parallel branches oriented N147° like the fault seen at surface. The seismic activity on the Main Emeelt Fault (MEF) is along at least 15 km, on the West and East branches, less active, along 10 km. The depth of the seismicity extends between 4 and 15 km. The activity seems concentrated at the intersection with Mesozoic faults and Vp/Vs contrast suggests the presence of fluids. The 10 swarms identified show an increasing activity and a spatial migration with time. The calculation of 2 possible scenarios, one M ~ 6.4 and one M ~ 7, shows an important impact on Ulaanbaatar, with a minimum intensity of VIII and IX for M=6.4 and X for M=7
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Raji, Wasiu. "Seismic and petro-physical studies on seismic wave attenuation." Thesis, University of Liverpool, 2012. http://livrepository.liverpool.ac.uk/7617/.

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Anelasticity and inhomogeneity in the Earth decreases the energy and modifies the frequency of seismic waves as they travel through the Earth. This phenomenon is known as seismic attenuation. The associated physical process leads to amplitude diminution, waveform distortion and phase delay. The level of attenuation a wave experiences depends on the degree of anelasticity and the scale of inhomgeneity in the rocks it passes through. Therefore, attenuation is sensitive to the presence of fluids, degree of saturation, porosity, fault, pressure, and the mineral content of the rocks. The work presented in this thesis covers attenuation measurements in seismic data; estimation of P- and S-wave attenuation in recorded well logs; attenuation analysis for pore fluid determination; and attenuation compensation in seismic data. Where applicable, a set of 3D seismic data or well logs recorded in the Gullfaks field, North Sea, Norway, is used to test the methods developed in the thesis. A new method for determining attenuation in reflection seismic data is presented. The inversion process comprises two key stages: computation of centroid frequency for the seismic signal corresponding to the top and base of the layer being investigated, using variable window length and fast Fourier transform; and estimation of the difference in centroid frequency and traveltime for the paired seismic signals. The use of a shape factor in the mathematical model allows several wavelet shapes to be used to represent a real seismic signal. When applied to synthetic data, results show that the method can provide reliable estimates of attenuation using any of the wavelet shapes commonly assumed for a real seismic signal. Tested against two published methods of quality factor (Q) measurement, the new method shows less sensitivity to interference from noise and change of frequency bandwidth. The method is also applied to seismic data recorded in the Gullfaks field. The trace length is divided into four intervals: AB, BC, CD, and DE. The mean attenuation (1/Q_m) calculated in intervals AB, BC, CD, and DE are 0.0196, 0.0573, 0.0389, and 0.0220, respectively. Results of attenuation measurements using the new method and the classical spectral ratio method (Bath 1974, Spencer et al, 1982) are in close agreement, and they show that interval BC and AB have the highest and lowest value of attenuation, respectively. One of the applications of Q measured in seismic records is its usage for attenuation compensation. To compensate for the effects of attenuation in recorded seismograms, I propose a Q-compensation algorithm using a recursive inverse Q-filtering scheme. The time varying inverse Q-filter has a Fourier integral representation in which the directions of the up-going and down-going waves are reversed. To overcome the instability problem of conventional inverse Q-filters, wave numbers are replaced with slownesses, and the compensation scheme is applied in a layer-by-layer recursive manner. When tested with synthetic and field seismograms, results show that the algorithm is appropriate for correcting energy dissipation and waveform distortion caused by attenuation. In comparison with the original seismograms, the Q-compensated seismograms show higher frequencies and amplitudes, and better resolved images of subsurface reflectors. Compressional and shear wave inverse quality factors (Q_P^(-1) and Q_S^(-1)) are estimated in the rocks penetrated by well A-10 of the Gullfaks field. The results indicate that the P-wave inverse quality factor is generally higher in hydrocarbon-saturated rocks than in brine-saturated rocks, but the S-wave inverse quality factor does not show a dependence on fluid content. The range of the ratio of Q_P^(-1) to Q_S^(-1) measured in gas, water and oil-saturated sands are 0.56 – 0.78, 0.39 – 0.55, and 0.35 – 0.41, respectively. A cross analysis of the ratio of P-wave to S-wave inverse quality factors, (Q_P^(-1))/(Q_S^(-1) ), with the ratio of P-wave to S-wave velocities, V_P/V_S , clearly distinguishes gas sand from water sand, and water sand from oil sand. Gas sand is characterised by the highest (Q_P^(-1))/(Q_S^(-1) ) and the lowest V_P/V_S ; oil sand is characterised by the lowest (Q_P^(-1))/(Q_S^(-1) ) and the highest V_P/V_S ; and water sand is characterized by the V_P/V_S and (Q_P^(-1))/(Q_S^(-1) ) values between those of the gas and oil sands. The signatures of the bulk modulus, Lame’s first parameter, and the compressional modulus (a hybrid of bulk and shear modulus) show sensitivities to both the pore fluid and rock mineral matrix. These moduli provided a preliminary identification for rock intervals saturated with different fluids. Finally, the possibility of using attenuation measured in seismic data to monitor saturation in hydrocarbon reservoirs is studied using synthetic time-lapse seismograms, and a theoretical rock physics forward modelling approach. The theory of modulus-frequency-dispersion is applied to compute a theoretical curve that describes the dynamic effects of saturation on attenuation. The attenuation measured in synthetic time-lapse seismograms is input to the theoretical curve to invert the saturation that gave rise to the attenuation. Findings from the study show that attenuation measured in recorded seismograms can be used to monitor reservoir saturation, if a relationship between seismogram-derived attenuation and saturation is known. The study also shows that attenuation depends on other material properties of rocks. For the case studied, at a saturation of 0.7, a 10% reduction in porosity caused a 5.9% rise in attenuation, while a 10% reduction in the bulk modulus of the saturating fluids caused an 11% reduction in attenuation.
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Zhang, Qie Sandvol Eric Alan. "Seismic tomography and anisotropy: studies of intraplate seismic zones." Diss., Columbia, Mo. : University of Missouri--Columbia, 2009. http://hdl.handle.net/10355/6855.

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Title from PDF of title page (University of Missouri--Columbia, viewed on Feb 24, 2010). The entire thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file; a non-technical public abstract appears in the public.pdf file. Dissertation advisor: Dr. Eric Sandvol. Vita. Includes bibliographical references.
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7

Qian, Zhongping. "Analysis of seismic anisotropy in 3D multi-component seismic data." Thesis, University of Edinburgh, 2010. http://hdl.handle.net/1842/3515.

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The importance of seismic anisotropy has been recognized by the oil industry since its first observation in hydrocarbon reservoirs in 1986, and the application of seismic anisotropy to solve geophysical problems has been keenly pursued since then. However, a lot of problems remain, which have limited the applications of the technology. Nowadays, more and more 3D multi-component seismic data with wide-azimuth are becoming available. These have provided more opportunities for the study of seismic anisotropy. My thesis has focused on the study of using seismic anisotropy in 3D multi-component seismic data to characterize subsurface fractures, improve converted wave imaging and detect fluid content in fractured reservoirs, all of which are important for fractured reservoir exploration and monitoring. For the use of seismic anisotropy to characterize subsurface fracture systems, equivalent medium theories have established the link between seismic anisotropy and fracture properties. The numerical modelling in the thesis reveals that the amplitudes and interval travel-time of the radial component of PS converted waves can be used to derive fracture properties through elliptical fitting similar to P-waves. However, sufficient offset coverage is required for either the P- or PS-wave to reveal the features of elliptical variation with azimuth. Compared with numerical modelling, seismic physical modelling provides additional insights into the azimuthal variation of P and PS-wave attributes and their links with fracture properties. Analysis of the seismic physical model data in the thesis shows that the ratio of the offset to the depth of a target layer (offset-depth ratio), is a key parameter controlling the choice of suitable attributes and methods for fracture analysis. Data with a small offset-depth ratio from 0.7 to 1.0 may be more suitable for amplitude analysis; whilst the use of travel time or velocity analysis requires a large offset-depth ratio above 1.0, which can help in reducing the effect of the acquisition footprint and structural imprint on the results. Multi-component seismic data is often heavily contaminated with noise, which will limit its application potential in seismic anisotropy analysis. A new method to reduce noise in 3D multi-component seismic data has been developed and has proved to be very helpful in improving data quality. The method can automatically recognize and eliminate strong noise in 3D converted wave seismic data with little interference to useful reflection signals. Component rotation is normally a routine procedure in 3D multi-component seismic analysis. However, this study shows that incorrect rotations may occur for certain acquisition geometry and can lead to errors in shear-wave splitting analysis. A quality control method has been developed to ensure this procedure is correctly carried out. The presence of seismic anisotropy can affect the quality of seismic imaging, but the study has shown that the magnitude of the effects depends on the data type and target depth. The effects of VTI anisotropy (transverse isotropy with a vertical symmetry axis) on P-wave images are much weaker than those on PS-wave images. Anisotropic effects decrease with depth for the P- and PS-waves. The real data example shows that the overall image quality of PS-waves processed by pre-stack time migration has been improved when VTI anisotropy has been taken into account. The improvements are mainly in the upper part of the section. Monitoring fluid distribution is an important task in producing reservoirs. A synthetic study based on a multi-scale rock-physics model shows that it is possible to use seismic anisotropy to derive viscosity information in a HTI medium (transverse isotropy with a horizontal symmetry axis). The numerical modelling demonstrates the effects of fluid viscosity on medium elastic properties and seismic reflectivity, as well as the possibility of using them to discriminate between oil and water saturation. Analysis of real data reveals that it is hard to use the P-wave to discriminate oil-water saturation. However, characteristic shear-wave splitting behaviour due to pore pressure changes demonstrates the potential for discriminating between oil and water saturation in fractured reservoirs.
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Yuan, Jianxin. "Analysis of four-component seafloor seismic data for seismic anisotropy." Thesis, University of Edinburgh, 2001. http://hdl.handle.net/1842/11663.

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Interest in converted waves (C-waves) has been growing significantly in recent yeas due to the advent of four-component (4C) ocean-bottom-cable (OBC) seismic recordings. This has changed the way geophysicists obtain fluid and lithology information about hydrocarbon reservoirs through joint P- and converted-wave analysis. Since 4C OBC surveys use conventional air-gun sources, which generate P-waves only, the shear-waves recorded by the 4C sensors on the ocean bottom are mode-converted shear-waves. The main focus of this thesis is to find ways to process and understand these mode-converted shear-waves in the presence of seismic anisotropy which is common in marine sediments. To this end, I examine and model the data characteristics of 4C seismic data, review the basic theory of converted-wave processing, develop new kinematic theories for converted-waves propagating in anisotropic, inhomogeneous media, and apply these new methods to field 4C data. I focus on two types of anisotropy: transverse isotropy with either a vertical (TIV) or horizontal (TIH) axis of symmetry. As an emerging technology, the characteristics of 4C seismic data have not been fully understood, and there are many acquisition related problems yet to be solved. The characteristics of 4C seafloor data have been studied by field data analysis and by synthetic modelling. I have found: 1) the water-column reverberations in the vertical geophone are much weaker than those in the hydrophone, because of the different sensor responses to the source- and receiver-side multiples; 2) the presence of a low shear-wave velocity gradient in the seabed prohibits P-to-S conversion, and this implies that most shear-waves recorded in 4C data are converted at deep reflector; 3) due to current sensor design, there is a shear-wave energy leakage from the inline horizontal geophone to the vertical geophone, resulting in geophone coupling problem. I have also studied the problem of sensor orientation and presented geophone orientation algorithms for both gimballed and non-gimballed geophone systems.
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Nishiyama, Minehiro. "Seismic Response and Seismic Design of Prestressed Concrete Building Structures." Kyoto University, 1993. http://hdl.handle.net/2433/74644.

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Lee, Changhyun. "Seismic Imaging using Image Point Transform for Borehole Seismic data." 京都大学 (Kyoto University), 2008. http://hdl.handle.net/2433/66203.

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Kyoto University (京都大学)
0048
新制・課程博士
博士(工学)
甲第14138号
工博第2972号
新制||工||1441(附属図書館)
26444
UT51-2008-N455
京都大学大学院工学研究科社会基盤工学専攻
(主査)教授 松岡 俊文, 教授 石田 毅, 教授 三ケ田 均
学位規則第4条第1項該当
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Books on the topic "Seismic"

1

Lyatkher, Victor M. Seismic Loads. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2015. http://dx.doi.org/10.1002/9781118946282.

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Wang, Yanghua, ed. Seismic Inversion. Chichester, UK: John Wiley & Sons, Ltd, 2016. http://dx.doi.org/10.1002/9781119258032.

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Nolet, Guust, ed. Seismic Tomography. Dordrecht: Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3899-1.

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Sen, Mrinal K. Seismic inversion. Richardson, TX: Society of Petroleum Engineers, 2006.

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Seismic inversion. Richardson, TX: Society of Petroleum Engineers, 2006.

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Seismic engineering. Hoboken, NJ: John Wiley & Sons, 2008.

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Lavergne, M. Seismic methods. London: Graham & Trotman, 1989.

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Li︠a︡tkher, V. M. Seismic loads. Hoboken, New Jersey: John Wiley & Sons, Inc., 2016.

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Lavergne, M. Seismic methods. Paris: Editions Technip, 1989.

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International Workshop on Seismic Anisotropy (6th 1994 Trondheim, Norway). Seismic anisotropy. Tulsa, Okla: Society of Exploration Geophysicists, 1996.

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Book chapters on the topic "Seismic"

1

Wills, Rosalie, James A. Milke, Sara Royle, and Kristin Steranka. "Seismic." In SpringerBriefs in Fire, 31–35. New York, NY: Springer New York, 2015. http://dx.doi.org/10.1007/978-1-4939-2883-5_7.

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Nolet, G. "Seismic wave propagation and seismic tomography." In Seismic Tomography, 1–23. Dordrecht: Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3899-1_1.

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Farfour, Mohammed, Jalal Ferahtia, Noureddine Djarfour, and Mohand Amokrane Aitouch. "SEISMIC SPECTRAL DECOMPOSITION APPLICATIONS IN SEISMIC." In Oil and Gas Exploration, 93–113. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2017. http://dx.doi.org/10.1002/9781119227519.ch6.

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Poupinet, G. "Seismic data collection platforms for satellite transmission." In Seismic Tomography, 239–50. Dordrecht: Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3899-1_10.

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Morelli, A., and A. M. Dziewonski. "The harmonic expansion approach to the retrieval of deep Earth structure." In Seismic Tomography, 251–74. Dordrecht: Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3899-1_11.

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Jobert, N., and G. Jobert. "Ray tracing for surface waves." In Seismic Tomography, 275–300. Dordrecht: Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3899-1_12.

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Nolet, G. "Waveform tomography." In Seismic Tomography, 301–22. Dordrecht: Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3899-1_13.

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Snieder, R. "Surface wave holography." In Seismic Tomography, 323–37. Dordrecht: Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3899-1_14.

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Ruff, Larry J. "Tomographic imaging of seismic sources." In Seismic Tomography, 339–66. Dordrecht: Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3899-1_15.

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Chapman, C. H. "The Radon transform and seismic tomography." In Seismic Tomography, 25–47. Dordrecht: Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3899-1_2.

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Conference papers on the topic "Seismic"

1

S. Draganov, D., and R. Ghose. "Seismic Interferometry in Near-Surface Seismics - An Experiment." In Near Surface 2006 - 12th EAGE European Meeting of Environmental and Engineering Geophysics. European Association of Geoscientists & Engineers, 2006. http://dx.doi.org/10.3997/2214-4609.201402721.

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Hollis, D., C. Cox, R. Clayton, F. Lin, D. Li, and B. Schmandt. "Long Beach 3D Seismic Survey: Data Mining Continuous Passive Seismic Data." In 4th EAGE Passive Seismic Workshop. Netherlands: EAGE Publications BV, 2013. http://dx.doi.org/10.3997/2214-4609.20142340.

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Zhao, Qingyuan, Murat A. Erdogdu, Hera Y. He, Anand Rajaraman, and Jure Leskovec. "SEISMIC." In KDD '15: The 21th ACM SIGKDD International Conference on Knowledge Discovery and Data Mining. New York, NY, USA: ACM, 2015. http://dx.doi.org/10.1145/2783258.2783401.

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Meunier, J., and J. P. Menard. "Seismic Noise without a Seismic Source." In 66th EAGE Conference & Exhibition. European Association of Geoscientists & Engineers, 2004. http://dx.doi.org/10.3997/2214-4609-pdb.3.h022.

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Zhang, Bo. "SEISMIC ATTRIBUTE FOR SEISMIC STRATIGRAPHY ANALYSIS." In GSA 2020 Connects Online. Geological Society of America, 2020. http://dx.doi.org/10.1130/abs/2020am-358787.

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Bagaini*, Claudio, Martin Laycock, Colin Readman, Emmanuel Coste, and Colin Anderson. "Seismo-acoustic characterization of a seismic vibrator." In SEG Technical Program Expanded Abstracts 2014. Society of Exploration Geophysicists, 2014. http://dx.doi.org/10.1190/segam2014-1126.1.

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Al Atroshi, K. "Optimal Seismic Processing and Seismic Inversion of Low Coverage 2D seismic Data, Southern Mesopotamia. A Seismic Reserve." In 69th EAGE Conference and Exhibition incorporating SPE EUROPEC 2007. European Association of Geoscientists & Engineers, 2007. http://dx.doi.org/10.3997/2214-4609.201401786.

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Barley, B., and G. Akula. "Justifying Broadband Seismic Acquisition." In EAGE/SPG Workshop on Broadband Seismic. Netherlands: EAGE Publications BV, 2014. http://dx.doi.org/10.3997/2214-4609.20141702.

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Mesdag, P. R., and M. D. Schakel. "Improving Seismic Reservoir Characterization With Broadband Seismic." In Offshore Technology Conference. Offshore Technology Conference, 2015. http://dx.doi.org/10.4043/25668-ms.

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Tolstukhin, Evgeny, Bjarne Lyngnes, and Hari Hara Sudan. "Ekofisk 4D Seismic - Seismic History Matching Workflow." In SPE Europec/EAGE Annual Conference. Society of Petroleum Engineers, 2012. http://dx.doi.org/10.2118/154347-ms.

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Reports on the topic "Seismic"

1

R. Quittmeyer. Seismic Studies. Office of Scientific and Technical Information (OSTI), September 2006. http://dx.doi.org/10.2172/899929.

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Dietrich, J. R. Seismic Stratigraphy. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1996. http://dx.doi.org/10.4095/207670.

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Clague, J. J. Seismic hazards. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1996. http://dx.doi.org/10.4095/213919.

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Cant, D. Seismic expression 6: detailed seismic line - Venture area. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1991. http://dx.doi.org/10.4095/210687.

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Bob A. Hardage. Elastic-Wavefield Seismic Stratigraphy: A New Seismic Imaging Technology. Office of Scientific and Technical Information (OSTI), July 2005. http://dx.doi.org/10.2172/896463.

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Bob A. Hardage, Milo M. Backus, Michael V. DeAngelo, Sergey Fomel, Khaled Fouad, Robert J. Graebner, Paul E. Murray, Randy Remington, and Diana Sava. Elastic-Wavefield Seismic Stratigraphy: A New Seismic Imaging Technology. Office of Scientific and Technical Information (OSTI), July 2006. http://dx.doi.org/10.2172/896464.

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Bob A. Hardage. ELASTIC-WAVEFIELD SEISMIC STRATIGRAPHY: A NEW SEISMIC IMAGING TECHNOLOGY. Office of Scientific and Technical Information (OSTI), May 2004. http://dx.doi.org/10.2172/834463.

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Innocent Aluka. Expanding Conventional Seismic Stratigrphy into the Multicomponent Seismic Domain. Office of Scientific and Technical Information (OSTI), August 2008. http://dx.doi.org/10.2172/946134.

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Tokarz, F., and D. Coats. Seismic Safety Study. Office of Scientific and Technical Information (OSTI), May 2006. http://dx.doi.org/10.2172/899412.

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Halle, J. B341 Seismic Evaluation. Office of Scientific and Technical Information (OSTI), January 2014. http://dx.doi.org/10.2172/1116944.

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