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Artigos de revistas sobre o tema "Cementation (Petrology)"

Autor: Grafiati

Publicado: 4 de junho de 2021

Última modificação: 26 de abril de 2022

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1

Olsen, Casper, Thanong Hongdul, and Ida Lykke Fabricius. "Prediction of Archie’s cementation factor from porosity and permeability through specific surface." GEOPHYSICS 73, no. 2 (March 2008): E81—E87. http://dx.doi.org/10.1190/1.2837303.

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Based on Archie’s cementation factor as measured on North Sea chalk and on published data, we explore how the cementation factor depends on other physical properties of the chalk. A relationship between cementation factor and specific surface with respect to bulk volume is obtained for chalk. This leads to how Archie’s cementation factor may be predicted from porosity and permeability for chalk as well as for sandstone. A common relationship between cementation factor and specific surface with respect to bulk volume calculated from porosity and permeability is obtained. As an alternative, the

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2

Han, Tongcheng, Zhoutuo Wei, and Li-Yun Fu. "Cementation exponent as a geometric factor for the elastic properties of granular rocks." GEOPHYSICS 85, no. 6 (November 1, 2020): MR341—MR349. http://dx.doi.org/10.1190/geo2020-0250.1.

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A geometric factor properly describing the microstructure of a rock is compulsory for effective medium models to accurately predict the elastic and electrical rock properties, which, in turn, are of great importance for interpreting data acquired by seismic and electromagnetic surveys, two of the most important geophysical methods for understanding the earth. Despite the applications of cementation exponent for the successful modeling of electrical rock properties, however, there has been no demonstration of cementation exponent as the geometric factor for the elastic rock properties. We have

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3

Zhu, Haihua, Guangchen Liu, Dakang Zhong, Tingshan Zhang, Jun Lang, and Jingli Yao. "Diagenetic controls on reservoir quality of tight sandstone: A case study of the Upper Triassic Yanchang formation Chang 7 sandstones, Ordos Basin, China." Earth Sciences Research Journal 22, no. 2 (April 1, 2018): 129–38. http://dx.doi.org/10.15446/esrj.v22n2.72251.

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Through a range of petrological techniques, the petrology, diagenesis, pore characteristics, and controlling factors on the regional variations of reservoir quality of the Chang 7 sandstones were studied. These sandstones, mainly arkoses, lithic arkoses, and feldspathic litharenites, were deposited in a delta front and turbidites in semi-deep to deep lacustrine. The detrital constituents were controlled by the provenance and sedimentary condition, which resulted in a spatially variable composition; e.g., high biotite and feldspar contents in the northeast (NE) of the study area, and high conte

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4

Al-Tahini, Ashraf M., Carl H. Sondergeld, and Chandra S. Rai. "Effect of cementation on ultrasonic velocities in sandstones." GEOPHYSICS 72, no. 2 (March 2007): E53—E58. http://dx.doi.org/10.1190/1.2431327.

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We determine the acoustic velocities for samples cored from the Jauf and Unayzah sandstone formations of Saudi Arabia. We use microstructural analysis including thin sections and point counting to quantify cementation. Velocities in these formations are strongly controlled by the combination of porosity and cementation. Consequently, rocks of similar porosity but with different cementation materials display different velocities. The objective of this study is to understand the effect of cementation on the acoustic velocity. Cements in these two formations have variable compositions and propert

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5

Iden, K. "Fracture Cementation in the North Sea." Mineralogical Magazine 62A, no. 2 (1998): 675–76. http://dx.doi.org/10.1180/minmag.1998.62a.2.22.

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6

El-Sayed, Mahmoud Kh. "Beachrock cementation in Alexandria, Egypt." Marine Geology 80, no. 1-2 (April 1988): 29–35. http://dx.doi.org/10.1016/0025-3227(88)90070-9.

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7

Grude, Sissel, Jack Dvorkin, and Martin Landrø. "Permeability variation with porosity, pore space geometry, and cement type: A case history from the Snøhvit field, the Barents Sea." GEOPHYSICS 80, no. 1 (January 1, 2015): D43—D49. http://dx.doi.org/10.1190/geo2014-0064.1.

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Laboratory permeability data from the brine-filled Tubåen Formation in the Snøhvit field show an order of magnitude permeability variation for approximately the same porosity. This variation in permeability is explained by a modified Kozeny-Carman equation that exploits the relationships among permeability, porosity, cementation, and pore geometry. The expression correlates the slope in a logarithmic plot of porosity versus permeability with the amount of contact cement and sorting, and the intercept with the grain size. Additional information about sorting and/or cementation can be used to be

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8

Barker, D. S., and K. L. Milliken. "CEMENTATION OF THE FOOTPRINT TUFF, LAETOLI, TANZANIA." Canadian Mineralogist 46, no. 4 (August 1, 2008): 831–41. http://dx.doi.org/10.3749/canmin.46.4.831.

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9

Pedersen, T. "Fracture Cementation Mechanisms in the North Sea." Mineralogical Magazine 62A, no. 2 (1998): 1149–50. http://dx.doi.org/10.1180/minmag.1998.62a.2.267.

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10

Riches, P., I. Traub-Sobott, W. Zimmerle, and U. Zinkernagel. "Diagenetic peculiarities of potential Lower Jurassic reservoir sandstones, Troms 1 area, Off Northern Norway, and their tectonic significance." Clay Minerals 21, no. 4 (October 1986): 565–84. http://dx.doi.org/10.1180/claymin.1986.021.4.09.

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AbstractIn the Troms 1 area, sediments of Early to Middle Jurassic age, ranging from alluvial plain deposits at the base, passing through coastal plain/tidal flat sediments up into high-energy nearshore shallow-marine sands, mark a transgression. The sandstones, classified as mineralogically and texturally mature quartz-arenites, are potential reservoir rocks in the eastern part of the area. The apparent supermaturity, however, is of secondary origin because unstable detrital components were dissolved during diagenesis. The succession of complex diagenetic processes was: (i) mechanical compact

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11

Thornber, M. R., E. Bettenay, and W. G. R. Russell. "A mechanism of aluminosilicate cementation to form a hardpan." Geochimica et Cosmochimica Acta 51, no. 9 (September 1987): 2303–10. http://dx.doi.org/10.1016/0016-7037(87)90283-3.

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12

Platt, J. D. "Controls on Clay Mineral Distribution and Chemistry in the Early Permian Rotliegend of Germany." Clay Minerals 28, no. 3 (September 1993): 393–416. http://dx.doi.org/10.1180/claymin.1993.028.3.05.

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AbstractAuthigenic clay minerals in the German Rotliegend formed mainly at burial depths >1.5 km. Illite is the dominant cement, although kaolinite, dickite and early radial chlorite are abundant locally. Illites contain more AI and late chlorites more AI and Fe in sequences showing extensive grain dissolution. This relationship between clay chemistry and grain dissolution suggests that clay cementation is linked to grain dissolution. Sequences at relatively shallow burial depths (<3-5 km) contain less clay cement. In the more deeply buried sections, increased illite and kandite cementat

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13

Zha, Xiaojun, Fuqiang Lai, Xuanbo Gao, Yang Gao, Nan Jiang, Long Luo, Yingyan Li, et al. "Characteristics and Genetic Mechanism of Pore Throat Structure of Shale Oil Reservoir in Saline Lake—A Case Study of Shale Oil of the Lucaogou Formation in Jimsar Sag, Junggar Basin." Energies 14, no. 24 (December 14, 2021): 8450. http://dx.doi.org/10.3390/en14248450.

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The shale oil reservoir of the Lucaogou Formation in the Jimsar Sag has undergone tectonic movement, regional deposition and complex diagenesis processes. Therefore, various reservoir space types and complex combination patterns of pores have developed, resulting in an intricate pore throat structure. The complex pore throat structure brings great challenges to the classification and evaluation of reservoirs and the efficient development of shale oil. The methods of scanning electron microscopy, high-pressure mercury injection, low-temperature adsorption experiments and thin-slice analysis wer

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14

Barnes, Heather, Johnny R. Hinojosa, Glenn A. Spinelli, Peter S. Mozley, Daniel Koning, Tyler G. Sproule, and John L. Wilson. "Detecting fault zone characteristics and paleovalley incision using electrical resistivity: Loma Blanca Fault, New Mexico." GEOPHYSICS 86, no. 3 (April 27, 2021): B209—B221. http://dx.doi.org/10.1190/geo2020-0375.1.

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We have combined electrical resistivity tomography (ERT), geologic information from boreholes and outcrops, and hydrogeologic data to investigate field-scale fault-zone cementation of the Loma Blanca Fault in the Rio Grande Rift. We have collected electrical resistivity data from 16 transects and geologic samples from 29 boreholes (completed as groundwater wells to 30 m depth) across and around the fault. The 2D ERT profiles, whose interpretations are constrained by geologic data, indicate (1) a high resistivity zone in cemented portions of the fault below the water table and (2) in the unsatu

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15

Salomon, Eric, Atle Rotevatn, Thomas Berg Kristensen, Sten-Andreas Grundvåg, Gijs Allard Henstra, Anna Nele Meckler, Richard Albert, and Axel Gerdes. "Fault-controlled fluid circulation and diagenesis along basin-bounding fault systems in rifts – insights from the East Greenland rift system." Solid Earth 11, no. 6 (November 5, 2020): 1987–2013. http://dx.doi.org/10.5194/se-11-1987-2020.

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Abstract. In marine rift basins, deep-water clastics (>200 m) in the hanging wall of rift- or basin-bounding fault systems are commonly juxtaposed against crystalline “basement” rocks in the footwall. A distinct feature of such fault systems is therefore the juxtaposition of relatively highly permeable, unconsolidated sediments against relatively low-permeable basement rocks. Due to limited surface exposure of such fault zones, studies elucidating their structure and evolution are rare. Consequently, their impact on fluid circulation and diagenesis within and proximal to the fault zone as w

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16

Saul, Matthew, and David Lumley. "The combined effects of pressure and cementation on 4D seismic data." GEOPHYSICS 80, no. 2 (March 1, 2015): WA135—WA148. http://dx.doi.org/10.1190/geo2014-0226.1.

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Time-lapse seismology has proven to be a useful method for monitoring reservoir fluid flow, identifying unproduced hydrocarbons and injected fluids, and improving overall reservoir management decisions. The large magnitudes of observed time-lapse seismic anomalies associated with strong pore pressure increases are sometimes not explainable by velocity-pressure relationships determined by fitting elastic theory to core data. This can lead to difficulties in interpreting time-lapse seismic data in terms of physically realizable changes in reservoir properties during injection. It is commonly ass

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17

Evans, J. "Quartz dissolution during shale diagenesis implications for quartz cementation in sandstones." Chemical Geology 84, no. 1-4 (July 1990): 239–40. http://dx.doi.org/10.1016/0009-2541(90)90224-u.

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18

Egeberg, Per Kristian, and Girish C. Saigal. "North Sea chalk diagenesis: cementation of chalks and healing of fractures." Chemical Geology 92, no. 4 (October 1991): 339–54. http://dx.doi.org/10.1016/0009-2541(91)90078-6.

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19

Aubert, Irène, Philippe Léonide, Juliette Lamarche, and Roland Salardon. "Diagenetic evolution of fault zones in Urgonian microporous carbonates, impact on reservoir properties (Provence – southeast France)." Solid Earth 11, no. 4 (July 5, 2020): 1163–86. http://dx.doi.org/10.5194/se-11-1163-2020.

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Abstract. Microporous carbonate rocks form important reservoirs with permeability variability depending on sedimentary, structural, and diagenetic factors. Carbonates are very sensitive to fluid–rock interactions that lead to secondary diagenetic processes like cementation and dissolution capable of modifying the reservoir properties. Focusing on fault-related diagenesis, the aim of this study is to identify the impact of the fault zone on reservoir quality. This contribution focuses on two fault zones east of La Fare anticline (SE France) crosscutting Urgonian microporous carbonates. Overall,

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20

Hughes, Alexandra T., Brian D. Smerdon, and Daniel S. Alessi. "Hydraulic properties of the Paskapoo Formation in west-central Alberta." Canadian Journal of Earth Sciences 54, no. 8 (August 2017): 883–92. http://dx.doi.org/10.1139/cjes-2016-0164.

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In an effort to better understand the hydraulic properties of the Paskapoo Formation, hydraulic conductivity and porosity were evaluated for a region in west-central Alberta. Whereas previous studies have focused mainly on sandstone units in the lower portion of the Paskapoo Formation, in southern and central parts of the province, this study focuses on the middle to upper portions. Hydraulic conductivity values were determined by air permeametry for seven drill cores from the area between Hinton and Fox Creek, Alberta. Thin-section petrology and porosity analyses using photomicrographs were a

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21

Holail, H. M., M. N. Shaaban, and A. S. Mansour. "Cementation of holocene beachrock in the Aqaba and the Arabian Gulfs: Comparative study." Carbonates and Evaporites 19, no. 2 (September 2004): 142–50. http://dx.doi.org/10.1007/bf03178477.

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22

PLECAS, I., S. DIMOVIC, and I. SMICIKLAS. "Influence of bentonite and zeolite in cementation of dry radioactive evaporator concentrates." Applied Clay Science 43, no. 1 (January 2009): 9–12. http://dx.doi.org/10.1016/j.clay.2008.07.003.

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23

Rimstad, Kjartan, and Henning Omre. "Impact of rock-physics depth trends and Markov random fields on hierarchical Bayesian lithology/fluid prediction." GEOPHYSICS 75, no. 4 (July 2010): R93—R108. http://dx.doi.org/10.1190/1.3463475.

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Early assessments of petroleum reservoirs are usually based on seismic data and observations in a small number of wells. Decision-making concerning the reservoir will be improved if these data can be integrated and converted into a lithology/fluid map of the reservoir. We analyze lithology/fluid prediction in a Bayesian setting, based on prestack seismic data and well observations. The likelihood model contains a convolved linearized Zoeppritz relation and rock-physics models with depth trends caused by compaction and cementation. Well observations are assumed to be exact. The likelihood model

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24

Cooper, Mark R., and Robert H. Hunter. "Precision serial lapping, imaging and three-dimensional reconstruction of minus-cement and post-cementation intergranular pore-systems in the Penrith Sandstone of north-western England." Mineralogical Magazine 59, no. 395 (June 1995): 213–20. http://dx.doi.org/10.1180/minmag.1995.059.395.06.

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AbstractThe application of serial lapping, imaging and image processing, and three-dimensional reconstruction techniques are discussed using the quartz-cemented Penrith Sandstone as an example. The study involves the characterization of the three-dimensional pore system microgeometry using combined back-scattered scanning electron and cathodoluminescence microscopy and focuses on the definition of post-compaction and post-cementation intergranular porosity networks. Sample preparation, section spacing and re-orientation and data presentation are described. Aspects of the application of serial

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25

Han, Tongcheng, Shengbiao Liu, Li-Yun Fu, and Han Yan. "Understanding how overpressure affects the physical properties of sandstones." GEOPHYSICS 86, no. 4 (June 15, 2021): MR203—MR210. http://dx.doi.org/10.1190/geo2020-0776.1.

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Overpressure is one of the major difficulties that we have to face when exploring the deep earth. Geophysical remote sensing methods, especially seismic and electrical methods, are widely used to predict overpressure for derisking the drilling of deep boreholes in the earth’s crust. However, there are major uncertainties in relating the measured geophysical parameters to the physical properties of crustal rocks, needed for reliable overpressure estimation. We address this knowledge gap through dedicated laboratory measurements of elastic velocity, electrical conductivity, and porosity with inc

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26

Mahon, Keith I., T. Mark Harrison, and Marty Grove. "The thermal and cementation histories of a sandstone petroleum reservoir, Elk Hills, California." Chemical Geology 152, no. 3-4 (November 1998): 227–56. http://dx.doi.org/10.1016/s0009-2541(98)00115-6.

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27

Mahon, Keith I., T. Mark Harrison, and Kevin D. McKeegan. "The thermal and cementation histories of a sandstone petroleum reservoir, Elk Hills, California." Chemical Geology 152, no. 3-4 (November 1998): 257–71. http://dx.doi.org/10.1016/s0009-2541(98)00116-8.

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28

Ma, Baoquan, Shaochun Yang, Hong Zhang, Qingdong Kong, Chunting Song, Ya Wang, Qinglin Bai, and Xidong Wang. "Diagenetic facies quantitative evaluation of low-permeability sandstone: A case study on Chang 82 reservoirs in the Zhenbei area, Ordos basin." Energy Exploration & Exploitation 36, no. 3 (November 7, 2017): 414–32. http://dx.doi.org/10.1177/0144598717738813.

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Quantitative characterization of diagenetic facies has great significance for reservoir evaluation and prediction. In order to find out the method to evaluate diagenetic facies, the author took Chang 82 reservoir low-permeability sandstone in Zhenbei area of Ordos basin as research object and divided the reservoir into six types of diagenetic facies by analysis of casting thin section, scanning electron microscope, cathode luminescence, and physical property. According to 14 quantitative evaluating parameters which were related with petrology characteristic, diagenesis strength, pore structure

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29

Gal, Doron, Jack Dvorkin, and Amos Nur. "A physical model for porosity reduction in sandstones." GEOPHYSICS 63, no. 2 (March 1998): 454–59. http://dx.doi.org/10.1190/1.1444346.

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The experimental elastic moduli‐porosity trends for clean sandstones can be described by the modified upper Hashin‐Shtrikman (MUHS) bound. One geometrical (but not necessarily geological) realization is: as porosity decreases, the number of the pores stays the same and each pore shrinks while maintaining its shape. This concept of uniform porosity reduction implies that permeability is proportional to the effective porosity squared, and that formation factor is proportional to the inverse of the effective porosity. The effective porosity here refers to the part of the pore‐space that dominates

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30

Singh, J., P. A. Cilli, A. Hosa, and I. G. Main. "Digital rock physics in four dimensions: simulating cementation and its effect on seismic velocity." Geophysical Journal International 222, no. 3 (June 3, 2020): 1606–19. http://dx.doi.org/10.1093/gji/ggaa271.

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SUMMARY Porosity exerts a strong control on the mechanical and hydraulic properties of rocks, but can often only be imaged indirectly from the surface using geophysical measurements, such as seismic velocity. Understanding and quantifying the relationship between seismic velocity and porosity is therefore a fundamental goal of many rock physics models. Simulating the geological processes that control porosity to generate digital rocks, and numerically modelling wave propagation to estimate their elastic properties, allows for flexible and rapid calibration of velocity–porosity trends. Here, th

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Fabián, M., Jana Ficeriová, J. Briančin, and J. Harvanová. "Alternative methods of obtaining silver from waste solutions using cementation." Mineral Processing and Extractive Metallurgy 122, no. 3 (September 2013): 133–36. http://dx.doi.org/10.1179/1743285513y.0000000035.

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Du, V. V., M. L. Polyakova, V. I. Grebenev, V. P. Zhludov, V. A. Groshev, and S. M. Terent'ev. "Soldering and cementation of hard-alloy metal cutting tool." Chemical and Petroleum Engineering 22, no. 9 (September 1986): 421–23. http://dx.doi.org/10.1007/bf01799302.

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33

Wang, Baobao, Xiucheng Tan, Wenjie Su, Wei Yan, Di Xiao, Mushi Guo, Shoukang Zhong, Yuqing Xu, and Mengying Yang. "Genesis and pore evolution of dolomite reservoir in the Majiagou Formation, Ordos Basin, China." Energy Exploration & Exploitation 40, no. 1 (October 20, 2021): 155–73. http://dx.doi.org/10.1177/01445987211049302.

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In gypsum–carbonate rock assemblages, multistage and complex fluids control the formation of dolomite reservoirs that are a focus of hydrocarbon exploration. It is difficult to determine the types of dolomite reservoirs and their formation mechanisms due to the diverse rock assemblages and multiple stages of diagenesis. In this study, we investigated the petrology, reservoir physical properties, and geochemistry of the 6th sub-member of member five of the Majiagou Formation (i.e. Ma56) in the Ordos Basin, China. These data were used to determine the nature and types of gypsum–carbonate rocks,

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Demirkıran, Nizamettin, Ahmet Ekmekyapar, Asım Künkül, and Ahmet Baysar. "A kinetic study of copper cementation with zinc in aqueous solutions." International Journal of Mineral Processing 82, no. 2 (March 2007): 80–85. http://dx.doi.org/10.1016/j.minpro.2006.10.005.

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Swarbrick, R. E. "Reservoir diagenesis and hydrocarbon migration under hydrostatic palaeopressure conditions." Clay Minerals 29, no. 4 (October 1994): 463–73. http://dx.doi.org/10.1180/claymin.1994.029.4.06.

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AbstractFluid inclusion studies from two contrasting fields in the Northern North Sea reveal hydrostatic pressure conditions during the formation of secondary quartz overgrowths which trapped both brine and petroleum inclusions. In these fields, dating of authigenic illite, part of the diagenetic sequence and broadly coeval with quartz cementation, permits comparison with modelled pressure conditions. Pressure modelling indicates the likelihood of several periods of overpressure in the past, interspersed with normal pressure. The timing of diagenesis coincides with one of these periods of hydr

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Xu, Huiyuan, Dujie Hou, Stefan C. Löhr, Quanyou Liu, and Simon C. George. "Early diagenetic pyrite cementation influences molecular composition of sedimentary organic matter in the Dongying Depression, China." Organic Geochemistry 144 (June 2020): 104019. http://dx.doi.org/10.1016/j.orggeochem.2020.104019.

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Flinn, Derek, and Allan Pentecost. "Travertine-cemented screes on the serpentinite seacliffs of Unst and Fetlar, Shetland." Mineralogical Magazine 59, no. 395 (June 1995): 259–65. http://dx.doi.org/10.1180/minmag.1995.059.395.10.

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AbstractScrees on high serpentinite sea cliffs in Shetland have been internally cemented by deposits of brucite, hydromagnesite and aragonite since the last glaciation. These minerals have been deposited from solutions originating as rain (often contaminated with salt spray), which fell on the serpentinite screes and dissolved Mg and minor amounts of Ca from the more finely divided and powdery scree components. As the solutions filtered down through the screes they deposited cements in the form of spherulitic layers of brucite and hydromagnesite with minor amounts of aragonite. At sea level th

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de Kuijper, A., R. K. J. Sandor, J. P. Hofman, and J. A. de Waal. "Conductivity of two‐component systems." GEOPHYSICS 61, no. 1 (January 1996): 162–68. http://dx.doi.org/10.1190/1.1443936.

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We present measurements and computer simulation results on the electrical conductivity of nonconducting grains embedded in a conductive brine host. The shapes of the grains ranged from prolate‐ellipsoidal (with an axis ratio of 5:1) through spherical to oblate‐ellipsoidal (with an axis ratio of 1:5). The conductivity was studied as a function of porosity and packing, and Archie’s cementation exponent was found to depend on porosity. We used spatially regular and random configurations with aligned and nonaligned packings. The experimental results agree well with the computer simulation data. Th

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Glover, Paul W. J. "Archie's law – a reappraisal." Solid Earth 7, no. 4 (July 29, 2016): 1157–69. http://dx.doi.org/10.5194/se-7-1157-2016.

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Abstract. When scientists apply Archie's first law they often include an extra parameter a, which was introduced about 10 years after the equation's first publication by Winsauer et al. (1952), and which is sometimes called the “tortuosity” or “lithology” parameter. This parameter is not, however, theoretically justified. Paradoxically, the Winsauer et al. (1952) form of Archie's law often performs better than the original, more theoretically correct version. The difference in the cementation exponent calculated from these two forms of Archie's law is important, and can lead to a misestimation

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Salazar, Jesús M., Gong Li Wang, Carlos Torres-Verdín, and Hee Jae Lee. "Combined simulation and inversion of SP and resistivity logs for the estimation of connate-water resistivity and Archie’s cementation exponent." GEOPHYSICS 73, no. 3 (May 2008): E107—E114. http://dx.doi.org/10.1190/1.2890408.

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Knowledge of initial water saturation is necessary to estimate original hydrocarbon in place. A reliable assessment of this petrophysical property is possible when rock-core measurements of Archie’s parameters, such as saturation exponent [Formula: see text] and cementation exponent [Formula: see text], are available. In addition, chemical analysis of formation water is necessary to measure connate-water resistivity [Formula: see text]. Such measurements are seldom available in most applications; if they are available, their reliability may be questionable. We describe a new inversion method t

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Klein, B., and N. E. Altun. "Gold losses by cementation and thermal reduction in the gold recovery circuits." International Journal of Mineral Processing 98, no. 1-2 (January 2011): 24–29. http://dx.doi.org/10.1016/j.minpro.2010.09.001.

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Caja, Miguel Ángel, Ihsan S. Al-Aasm, Rafaela Marfil, Meaza Tsige, Tomás Martín-Crespo, and Ramón Salas. "Multiphase carbonate cementation related tofractures in the Upper Jurassic limestones, Maestrat Basin (Iberian Range, Spain)." Journal of Geochemical Exploration 78-79 (May 2003): 33–38. http://dx.doi.org/10.1016/s0375-6742(03)00045-1.

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Liu, Xiao-Dong, Li-Guang Sun, Zhong-Qi Cheng, San-Ping Zhao, Ke-Xin Liu, Xiao-Hong Wu, Zhou-Qing Xie, et al. "Paleoenvironmental implications of the guano phosphatic cementation on Dongdao Island in the South China Sea." Marine Geology 247, no. 1-2 (January 2008): 1–16. http://dx.doi.org/10.1016/j.margeo.2007.03.014.

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Jørgensen, Niels Oluf. "Methane-derived carbonate cementation of marine sediments from the Kattegat, Denmark: Geochemical and geological evidence." Marine Geology 103, no. 1-3 (January 1992): 1–13. http://dx.doi.org/10.1016/0025-3227(92)90006-4.

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Yang, Zhi, Sheng He, Furong Wang, Zhiliang He, Hengzhi Wu, and Xianlong Meng. "Carbonate cementation-dissolution in deep-seated sandstones near the overpressure top in central Junggar Basin, Xinjiang, NW China." Chinese Journal of Geochemistry 28, no. 1 (January 11, 2009): 86–96. http://dx.doi.org/10.1007/s11631-009-0086-x.

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Muñoz-López, Daniel, David Cruset, Irene Cantarero, Antonio Benedicto, Cédric M. John, and Anna Travé. "Fluid Dynamics in a Thrust Fault Inferred from Petrology and Geochemistry of Calcite Veins: An Example from the Southern Pyrenees." Geofluids 2020 (September 25, 2020): 1–25. http://dx.doi.org/10.1155/2020/8815729.

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Petrographic and geochemical analyses (δ18O, δ13C, 87Sr/86Sr, clumped isotopes, and elemental composition) coupled with field structural data of synkinematic calcite veins, fault rocks, and host rocks are used to reconstruct the episodic evolution of an outstanding exposed thrust zone in the Southern Pyrenees and to evaluate the fault behavior as a conduit or barrier to fluid migration. The selected thrust displaces the steeply dipping southern limb of the Sant Corneli-Bóixols anticline, juxtaposing a Cenomanian-Turonian carbonate unit against a Coniacian carbonate sequence. Successive deforma

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de Lima, Olivar A. L., Michael Ben Clennell, Geraldo Girão Nery, and Sri Niwas. "A volumetric approach for the resistivity response of freshwater shaly sandstones." GEOPHYSICS 70, no. 1 (January 2005): F1—F10. http://dx.doi.org/10.1190/1.1852771.

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The dc electrical response of freshwater-saturated shaly sandstone is analyzed on the basis of effective volume conductivity concepts for a concentrated mixture of “solid grains” in a continuous electrolyte. The bulk conductivity of this model is physically controlled by (1) the effective porosity and the average electrical tortuosity of its free-pore electrolyte, and (2) the amount and concentration of bound water that coats charged solid surfaces (mainly of clays), and a corresponding averaged electrical surface tortuosity. The latter is combined in an equivalent volume conductivity that is

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Vernik, L. "Predicting lithology and transport properties from acoustic velocities based on petrophysical classification of siliciclastics." GEOPHYSICS 59, no. 3 (March 1994): 420–27. http://dx.doi.org/10.1190/1.1443604.

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Based on the recently developed petrophysical classification of siliciclastics, which takes into account the amount of the volumetric clay content C and textural position of clay, it is shown that acoustic velocities can be fairly accurate tools in predicting lithology, porosity, and ultimately, transport properties of these rocks. Four major petrophysical groups of carbonate‐ and organic‐poor siliciclastics are distinguished: (1) clean arenites (C < 2 percent), (2) arenites and arkoses (C = 2–15 percent), (3) wackes (C = 15–35 percent), and (4) shales (C > 35 percent). The compressional

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Hossain, Zakir, Tapan Mukerji, Jack Dvorkin, and Ida L. Fabricius. "Rock physics model of glauconitic greensand from the North Sea." GEOPHYSICS 76, no. 6 (November 2011): E199—E209. http://dx.doi.org/10.1190/geo2010-0366.1.

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The objective of this study was to establish a rock physics model of North Sea Paleogene greensand. The Hertz-Mindlin contact model is widely used to calculate elastic velocities of sandstone as well as to calculate the initial sand-pack modulus of the soft-sand, stiff-sand, and intermediate-stiff-sand models. When mixed minerals in rock are quite different, e.g., mixtures of quartz and glauconite in greensand, the Hertz-Mindlin contact model of single type of grain may not be enough to predict elastic velocity. Our approach is first to develop a Hertz-Mindlin contact model for a mixture of qu

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Gkortsas, Vasileios-Marios, Lalitha Venkataramanan, Kamilla Fellah, David Ramsdell, Chang-Yu Hou, and Nikita Seleznev. "Comparison of different dielectric models to calculate water saturation and estimate textural parameters in partially saturated cores." GEOPHYSICS 83, no. 5 (September 1, 2018): E303—E318. http://dx.doi.org/10.1190/geo2018-0100.1.

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Accurate estimation of water saturation is central in predicting capillary pressure and relative permeability, under special core analysis in the laboratory. We have explored the use of dielectric measurements at different frequencies to estimate water saturation. In addition to water saturation, dielectric measurements are sensitive to the distribution of water and oil in a porous system, reflected by the apparent cementation factor [Formula: see text], which describes the water phase tortuosity. We have performed an experimental study to benchmark water saturation from dielectric measurement

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