Robert G. Loucks, Stephen C. Ruppel, Xiangzeng Wang, Lucy Ko, Sheng Peng, Tongwei Zhang, Harry D. Rowe & Patrick Smith
Interpretation: SEG 5 (2):SF63-SF79 (2017)
Abstract |
Continental Upper Triassic Yanchang “black shales” in the southeastern Ordos Basin have been proven to be unconventional gas reservoirs. Organic-matter-lean and organic-matter-rich argillaceous mudstones form reservoirs that were deposited in a deeper water lacustrine setting during lake highstands. In the stratified lake, the bottom waters were dysaerobic to anoxic. This low-energy and low-oxygen lake-bottom setting allowed types II and III organic matter to accumulate. Interbedded with the argillaceous mudstones are argillaceous arkosic siltstones deposited by gravity-flow processes. Rock samples from the Yanchang Chang 7–9 members are very immature mineralogically. Mineral grains are predominantly composed of relatively equal portions of quartz and feldspar. The high clay-mineral content, generally greater than 40%, has promoted extensive compaction of the sediments, permitting the ductile material to deform and occlude interparticle pores. Furthermore, this high clay-mineral content does not favor hydraulic fracturing of the mudstone reservoir. The pore network within the mudstones is dominated by intraparticle pores and a lesser abundance of organic-matter pores. Interparticle pores are rare. The mean Gas Research Institute crushed-rock porosity is 4.2%. Because the pore network is dominated by poorly connected intraparticle pores, permeability is very low. The dominance of intraparticle pores creates a very poor correlation between GRI porosity and GRI permeability. Several methods of porosity analysis were conducted on each samples, and the results were compared. There is no significant correlation between the three methods, implying that each method measures different pore sizes or types. There is also no relationship between the porosity and permeability and total organic carbon. Much of the mature organic matter is nonporous, suggesting that it is of type III. Most of the organic-matter pores are in migrated solid bitumen. Overall, the samples analyzed have low porosity and permeability for mudrocks.
|
Keywords | No keywords specified (fix it) |
Categories |
No categories specified (categorize this paper) |
DOI | 10.1190/int-2016-0094.1 |
Options |
![]() ![]() ![]() ![]() |
Download options
References found in this work BETA
Chemostratigraphic Insights Into Fluvio-Lacustrine Deposition, Yanchang Formation, Upper Triassic, Ordos Basin, China.Harry Rowe, Xiangzeng Wang, Bojiang Fan, Tongwei Zhang, Stephen C. Ruppel, Kitty L. Milliken, Robert Loucks, Ying Shen, Jianfeng Zhang, Quansheng Liang & Evan Sivil - 2017 - Interpretation: SEG 5 (2):SF149-SF165.
Geochemical Evidence for Oil and Gas Expulsion in Triassic Lacustrine Organic-Rich Mudstone, Ordos Basin, China.Tongwei Zhang, Xiangzeng Wang, Jianfeng Zhang, Xun Sun, Kitty L. Milliken, Stephen C. Ruppel & Daniel Enriquez - 2017 - Interpretation: SEG 5 (2):SF41-SF61.
Grain Composition and Diagenesis of Organic-Rich Lacustrine Tarls, Triassic Yanchang Formation, Ordos Basin, China.Kitty L. Milliken, Ying Shen, Lucy T. Ko & Quansheng Liang - 2017 - Interpretation: SEG 5 (2):SF189-SF210.
Controls on Pore Types and Pore-Size Distribution in the Upper Triassic Yanchang Formation, Ordos Basin, China: Implications for Pore-Evolution Models of Lacustrine Mudrocks.Lucy T. Ko, Robert G. Loucks, Kitty L. Milliken, Quansheng Liang, Tongwei Zhang, Xun Sun, Paul C. Hackley, Stephen C. Ruppel & Sheng Peng - 2017 - Interpretation: SEG 5 (2):SF127-SF148.
Facies, Rock Attributes, Stratigraphy, and Depositional Environments: Yanchang Formation, Central Ordos Basin, China.Stephen C. Ruppel, Harry Rowe, Kitty Milliken, Chao Gao & Yongping Wan - 2017 - Interpretation: SEG 5 (2):SF15-SF29.
View all 6 references / Add more references
Citations of this work BETA
Chemostratigraphic Insights Into Fluvio-Lacustrine Deposition, Yanchang Formation, Upper Triassic, Ordos Basin, China.Harry Rowe, Xiangzeng Wang, Bojiang Fan, Tongwei Zhang, Stephen C. Ruppel, Kitty L. Milliken, Robert Loucks, Ying Shen, Jianfeng Zhang, Quansheng Liang & Evan Sivil - 2017 - Interpretation: SEG 5 (2):SF149-SF165.
Grain Composition and Diagenesis of Organic-Rich Lacustrine Tarls, Triassic Yanchang Formation, Ordos Basin, China.Kitty L. Milliken, Ying Shen, Lucy T. Ko & Quansheng Liang - 2017 - Interpretation: SEG 5 (2):SF189-SF210.
Controls on Pore Types and Pore-Size Distribution in the Upper Triassic Yanchang Formation, Ordos Basin, China: Implications for Pore-Evolution Models of Lacustrine Mudrocks.Lucy T. Ko, Robert G. Loucks, Kitty L. Milliken, Quansheng Liang, Tongwei Zhang, Xun Sun, Paul C. Hackley, Stephen C. Ruppel & Sheng Peng - 2017 - Interpretation: SEG 5 (2):SF127-SF148.
Facies, Rock Attributes, Stratigraphy, and Depositional Environments: Yanchang Formation, Central Ordos Basin, China.Stephen C. Ruppel, Harry Rowe, Kitty Milliken, Chao Gao & Yongping Wan - 2017 - Interpretation: SEG 5 (2):SF15-SF29.
Pore-Throat Structures and Their Control of Terrestrial Lacustrine Tight Reservoir Quality: The Permian Lucaogou Formation, Jimsar Sag, Northwestern China.Ke Ma, Jiagen Hou, Lin Yan & Fuli Chen - 2018 - Interpretation: SEG 6 (4):T889-T906.
View all 7 citations / Add more citations
Similar books and articles
Hydrocarbon Storage Space Within Lacustrine Gas Shale of the Triassic Yanchang Formation, Ordos Basin, China.Xiangzeng Wang, Lixia Zhang, Chengfu Jiang & Bojiang Fan - 2015 - Interpretation: SEG 3 (2):SJ15-SJ23.
Geochemical Evidence for Oil and Gas Expulsion in Triassic Lacustrine Organic-Rich Mudstone, Ordos Basin, China.Tongwei Zhang, Xiangzeng Wang, Jianfeng Zhang, Xun Sun, Kitty L. Milliken, Stephen C. Ruppel & Daniel Enriquez - 2017 - Interpretation: SEG 5 (2):SF41-SF61.
Practical Application of Liquid-CO2/Slick-Water Hybrid Fracturing Technology in the Lacustrine Shale Gas Reservoir in Ordos Basin, China.Xiangzeng Wang - 2015 - Interpretation: SEG 3 (2):SJ75-SJ80.
An Integrated Pore-Pressure Model and its Application to Hydrocarbon Exploration: A Case Study From the Mahanadi Basin, East Coast of India.Ajesh John, Ashutosh Kumar, Karthikeyan G. & Pankaj Gupta - 2014 - Interpretation: SEG 2 (1):SB17-SB26.
Translocation Through the Nuclear Pore: Kaps Pave the Way.Reiner Peters - 2009 - Bioessays 31 (4):466-477.
Quantifying Shale Pore Pressure by Modeling the Controls on Compaction and Porosity.James T. Krushin - 2014 - Interpretation: SEG 2 (1):SB79-SB88.
Molecular Dynamics Study of Thermal Diffusion in a Binary Mixture of Alkanes Trapped in a Slit Pore.Jean Colombani, Guillaume Galliéro, Bernard Duguay, Jean-Paul Caltagirone & François Montel - 2003 - Philosophical Magazine 83 (17-18):2087-2095.
Predrill Pore-Pressure Prediction and Pore Pressure and Fluid Loss Monitoring During Drilling: A Case Study for a Deepwater Subsalt Gulf of Mexico Well and Discussion on Fracture Gradient, Fluid Losses, and Wellbore Breathing.Fernando Enrique Ziegler & John F. Jones - 2014 - Interpretation: SEG 2 (1):SB45-SB55.
Maxwell's Demon and Detailed Balancing.L. G. M. Gordon - 1983 - Foundations of Physics 13 (10):989-997.
The Fuling Shale Gas Field — A Highly Productive Silurian Gas Shale with High Thermal Maturity and Complex Evolution History, Southeastern Sichuan Basin, China.Tonglou Guo - 2015 - Interpretation: SEG 3 (2):SJ25-SJ34.
Characterization and Origin of the Silurian Wufeng-Longmaxi Formation Shale Multiscale Heterogeneity in Southeastern Sichuan Basin, China.Zhenxue Jiang, Xianglu Tang, Lijun Cheng, Zhuo Li, Yingying Zhang, Yongqiang Bai, Yuan Yuan & Jin Hao - 2015 - Interpretation: SEG 3 (2):SJ61-SJ74.
Geophysical Basin Modeling: Effective Stress, Temperature, and Pore Pressure Uncertainty.Giuseppe De Prisco, David Thanoon, Ran Bachrach, Ivar Brevik, Stephen A. Clark, Maarten P. Corver, Randolph E. F. Pepper, Thomas Hantschel, Hans Kristian Helgesen, Konstantin Osypov & Olav K. Leirfall - 2015 - Interpretation: SEG 3 (3):SZ27-SZ39.
Petrophysical Rock Classification in the Cotton Valley Tight-Gas Sandstone Reservoir with a Clustering Pore-System Orthogonality Matrix.Chicheng Xu & Carlos Torres-Verdín - 2014 - Interpretation: SEG 2 (1):T13-T23.
Gas-Prospective Area Optimization for Silurian Shale Gas of Longmaxi Formation in Southern Sichuan Basin, China.Jiang Yuqiang, Zhang Qichen, Zhang Hu, Gan Hui, Luo Mingsheng & Huang Yongbin - 2015 - Interpretation: SEG 3 (2):SJ49-SJ59.
Analytics
Added to PP index
2017-02-09
Total views
31 ( #330,543 of 2,402,081 )
Recent downloads (6 months)
3 ( #257,447 of 2,402,081 )
2017-02-09
Total views
31 ( #330,543 of 2,402,081 )
Recent downloads (6 months)
3 ( #257,447 of 2,402,081 )
How can I increase my downloads?
Downloads