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Добірка наукової літератури з теми "Geological bar"

Автор: Grafiati

Опубліковано: 8 листопада 2023

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Статті в журналах з теми "Geological bar"

Luo, Chao, Ailin Jia, Jianlin Guo, et al. "Modeling of dense well block point bar architecture based on geological vector information: A case study of the third member of Quantou Formation in Songliao Basin." Open Geosciences 13, no. 1 (2021): 39–48. http://dx.doi.org/10.1515/geo-2020-0222.

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Abstract Although stochastic modeling methods can achieve multiple implementations of sedimentary microfacies model in dense well blocks, it is difficult to realize continuous convergence of well spacing. Taking the small high-sinuosity meandering river sediments of the third member of Quantou Formation in Songliao Basin as an example, a deterministic modeling method based on geological vector information was explored in this article. Quantitative geological characteristics of point bar sediments were analyzed by field outcrops, modern sediments, and dense well block anatomy. The lateral extension distance, length, and spacing parameters of the point bar were used to quantitatively characterize the thickness, dip angle, and frequency of the lateral layer. In addition, the three-dimensional architecture modeling of the point bar was carried out in the study. The established three-dimensional architecture model of well X24-1 had continuous convergence near all wells, which conformed to the geological knowledge of small high-sinuosity meandering river, and verified the reliability of this method in the process of geological modeling in dense well blocks.

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Sinaga, Goldberd Harmuda Duva, Agoez Loeqman, Ruben Cornelius Siagian, and Mardame Pangihutan Sinaga. "Analysis of Coulomb Stress Changes in Aceh Earthquake on Sibayak Volcano." Jurnal Pendidikan Fisika dan Teknologi 8, no. 2 (2022): 217–27. http://dx.doi.org/10.29303/jpft.v8i2.4409.

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Based on geological conditions, Indonesia is located between the Indo-Australian plate, the Eurasian plate, and the Pacific plate, making Indonesia prone to tectonic earthquakes. However, since the big earthquake that occurred in Aceh on December 26, 2004, the geological conditions in Sumatra have undergone significant changes marked by stressful situations in the western to southern regions of Sumatra, especially on Sibayak Volcano. This study used data from BMKG and Global CMT, which included magnitude (Mw), depth, earthquake coordinates (longitude and latitude), type of earthquake, strike, dip, and rake. From the analysis using Coulomb 3.3, the highest coulomb stress value of Sibayak Volcano was obtained in 2015 with an average change in coulomb stress of 0.235 bar, shear 0.1909 bar, normal 0.1106 bar. However, the lowest coulomb stress value occurs in 2021 with a moderate shift in coulomb stress of 0.0593 bar, shear 0.0251, normal 0.0849 bar.

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Neuhoff, P. S., and D. K. Bird. "Partial dehydration of laumontite: thermodynamic constraints and petrogenetic implications." Mineralogical Magazine 65, no. 1 (2001): 59–70. http://dx.doi.org/10.1180/002646101550127.

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AbstractLaumontite is a common zeolite mineral indicative of low-grade metamorphism of lavas and volcaniclastic sediments. Stoichiometric laumontite (CaAl2Si4O12·4.5H2O) dehydrates in air at 298.15 K, 1 bar to leonhardite (CaAl2Si4O12·3.5H2O) via loss of water from the W1 crystallographic site. Consideration of reported X-ray diffraction and calorimetric data indicates that the standard molal volume and entropy for dehydration of laumontite to leonhardite + liquid water are ∼13 cc/mol and ∼8 cal/molK, respectively, at 298.15 K, 1 bar. Equilibrium between laumontite and leonhardite occurs at 70 to 80% relative humidity at 298.15 K, 1 bar, corresponding to a standard molal Gibbs energy and enthalpy of reaction of ∼170±40 and ∼2630±100 cal/mol, respectively. Calculated univariant equilibrium for this reaction is nearly linear from 46±3°C at 1 bar to 235±3°C at 5000 bar. Comparison of geological observations with these results suggests that laumontite forms as ‘leonhardite’ during metamorphism and diagenesis. Consideration of ‘leonhardite’, instead of laumontite, in low-grade metamorphic phase relations facilitates prediction of the relative stabilities of zeolites in natural and geologic systems, where calculated entropies of reaction incorrectly predict that assemblages bearing fully hydrated laumontite are stable at lower temperatures than the zeolites heulandite and stilbite.

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Qi, Ren Li, Kai Yuan Chen, Bo Niu, and Zhan Tao Xing. "The Depositional System of Dongying Formation and Subtle Reservoir Exploration in Sha’nan Structural Belt Qikou Sag of Bohai Bay Basin, China." Advanced Materials Research 616-618 (December 2012): 32–37. http://dx.doi.org/10.4028/www.scientific.net/amr.616-618.32.

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The subtle reservoir has become an important exploration target within the Bohai Bay Basin, especially in the Qikou sag. In order to guide subtle reservoirs exploration in offshore area geological analysis to Sha’nan structural belt is carried out in this paper. Qikou sag has large thickness, high abundance, ideal type hydrocarbon source rock. By unconformity recognition technique and paleotectonic analysis technique, results show that tectonic uplift had provided sedimentary source to the depression around it after Es1. By 3-D seismic interpretation technique and Seismic facies analysis, the sedimentary facies was confirmed. Geological analysis results show that sand bar, subaqueous fan is developed around it in Ed3. With the new geological analysis data sedimentary model of Sha’nan structural belt has been built in this paper. The sand bar and subaqueous fans showed a good reservoir potential, which are advantageous to oil accumulations. The southern part of Sha’nan structural belt has good hydrocarbon exploration potential.

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Lee, J. B., P. R. Osborne, J. C. Williams, and A. S. Woodyatt. "Airborne spectral sensing of hydrothermal alteration minerals." Exploration Geophysics 20, no. 2 (1989): 81. http://dx.doi.org/10.1071/eg989081.

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Remote sensing infrared spectrometer data were collected with the Geophysical and Environmental Research Corp. 64 channel scanning spectrometer. These have been used to delineate geological units and, subject to some ambiguity, identify their mineralogy. Results are given for a survey area near Coppin Gap in the Pilbara region of Western Australia. Here, clear distinction was obtained between the sericite mineralogy of the Hardey Sandstone and some members of the Marble Bar belt, and the carbonate or epidote/chlorite mineralogy of the Kylena Basalt and other units in the Marble Bar belt.From the airborne spectrometer data it was also possible to identify and map the occurrence of the mineral pyrophyllite. Analysis of field samples confirmed the identification and provided evidence that the technique was indeed mapping the occurrence of this mineral.The applicability of this technique has been assessed from other surveys in Australia, and it appears to require good geological exposure and sparse vegetation. There is some scope for extension of its applicability through further instrumental developments.

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Tong, Rui Ming, Xian Long Lu, and Wei Feng Zheng. "Experiment Study on Bolts Foundation of Large-Jointed Rock Mass in Transmission Lines." Applied Mechanics and Materials 256-259 (December 2012): 344–49. http://dx.doi.org/10.4028/www.scientific.net/amm.256-259.344.

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Large-jointed rock mass is the main geological condition of transmission lines of Qingyuan Regions in Guangdong Province. The bolt foundations haven’t be studied and applied in this geological condition. Static load tests of 15 single-bolt foundations and 8 group-bolt foundations were carried out. Experiment study shows that the mechanical characteristics of bolt foundation are suitable for transmission lines in large-jointed rock mass. The design parameters of anchor bar in large-jointed rock mass are derived from the measured data:τa>2359kPa, τb>618kPa, τc>42kPa.

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Aleksandrov, Vadim, Marsel Kadyrov, Andrey Ponomarev, Kirill Galinskij, and Sergey Aleksandrov. "Genetic Zoning of the YUV₁ Productive Horizon Deposits within the Tagrinsko-Yarainersky Bar." Key Engineering Materials 785 (October 2018): 140–45. http://dx.doi.org/10.4028/www.scientific.net/kem.785.140.

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The developed litho-sedimentological model of deposits of the YUV1productive horizon makes it possible to choose the most effective technique for supplementary exploration of a natural reservoir and improve the quality of geological justification for its subsequent development. The research objective is to carry out paleogeographic and paleostructural reconstructions, to identify facies complexes in the Upper Jurassic productive deposits, and to identify zones for the development of improved reservoir units. With the help of paleogeographic and facies methods, the geological regularities of the development of the territory encompassing the Tagrinsko-Yarainersky Bar in the Late Callovian-Oxfordian Stage were studied.

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Li, Wanbing, Shaohua Li, Quangong Qu, Huafeng Zhang, Junying Zhao, and Mengjiao Dou. "A Modeling Approach for Beach-Bar Sand Reservoirs Based on Depositional Mode and Sandbody Volume." Minerals 12, no. 8 (2022): 950. http://dx.doi.org/10.3390/min12080950.

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Beach-bar sand in lacustrine facies represents one of the most significant reservoirs. Depending on the depositional characteristics, it can be further divided into two different sedimentary microfacies, beach sand and the bar sand. Favorable reservoirs are often developed in bar sand. The lower section of the upper part of the 4th member of the Shahejie Formation in the Gao89-1 block is a typical nearshore shallow water beach-bar deposit. Oil distribution is influenced by lithofacies and physical properties. In order to better characterize the heterogeneity within beach-bar sandbodies, a modeling method based on the depositional mode and sandbody volume is proposed. Firstly, a sandbody model is established. On this basis, an algorithm for distinguishing between beach and bar sand based on vertical thickness is proposed. The model is post processed based on the sandbody volume to remove unreasonable sandbodies. The method allows for a more realistic three-dimensional geological model of the beach-bar sands in the study area than the classical two-point geostatistical, object-based, and multi-point simulation method. A facies-controlled modeling approach is used to establish a petrophysical property model on this foundation; the result shows that the property models better reflect the characteristics of the petrophysical distribution in the Gao89-1 block.

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Li, Jun Jie, Yuan Fu Zhang, and Guo Guo Liu. "Sedimentary Research of Block8 in Jinglou Oilfield." Advanced Materials Research 1010-1012 (August 2014): 1435–39. http://dx.doi.org/10.4028/www.scientific.net/amr.1010-1012.1435.

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By core observation and logging in Block8, Jinglou oilfield, we distinguished the sedimentary structure characteristics and the logs’ features of subaqueous distributary channel, mouth bar, sheet sand and interdistributary. Then we promoted it in the whole region, and characterised the sedimentary faices of every layers. So we provide a reliable geological basis for progressive development in research area.

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Bohloli, Bahman. "Effects of the geological parameters on rock blasting using the Hopkinson split bar." International Journal of Rock Mechanics and Mining Sciences 34, no. 3-4 (1997): 32.e1–32.e9. http://dx.doi.org/10.1016/s1365-1609(97)00228-1.

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