Abstract
Dongying Sag of Bohai bay basin is one of the most important oil-rich hydrocarbon Depressions in the east of China. The lower Es3-upper Es4 in Dongying sag have great potential for shale oil exploration and development. In this paper, according to the favorable intervals of the Chunshang submember of upper Es4 in Dongying Sag, the rock facies and their compositions were classified and designated comprehensively using laboratory tests and analysis methods such as core, X-diffraction, conventional thin section, SEM and rock paralysis and fully considering mineral composition, organic matter abundance and bedding structures; the evaluation of the reservoir capacity and mobility of continental shale oil with different rock facies was studied taking mineral composition, bedding structures, reservoir space type and mechanism and movable oil saturation etc. into account. The result shows that the reservoir of the Upper Sub-member 4 in Paleogene Shahejie Formation has a relatively high content of carbonate and low content of clay; medium-rich organic laminated limy (dolomitic) mudstone is the major rock facies, which is strongly heterogonous vertically and displays varied oiliness index. The reservoir space types of different rock facies are classified as pores and fractures, mainly including clay slice pore, mineral intercrystalline pore and micro-fractures.The Chunshang submember of upper Es4 in Dongying Sag has a high oil saturation (averagely over 100), a well developed reservoir space and a shale oil reservoir with strong mobility. These findings provide a strong theoretical support for the effective development.
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References
Linye, Z., Youshu, B., Juyuan, L., et al.: Movability of lacustrine shale oil: a case study of Dongying Sag, Jiyang Depression, Bohai Bay Basin. Pet. Explor. Dev. 41(6), 641–649 (2014)
Zaixing, J.: Sedimentology, 2nd edn. Petroleum Industry Press, Beijing (2010)
Chunmei, D., Cunfei, M., Chengyan, L., et al.: A method of classification of shale set. J. China Univ. Pet. 39(3), 1–7 (2015)
Wanqin, Y., Youlu, J., Yong, W.: Study on shale facies sedimentary environment of lower Es3-upper Es4 in Dongying sag. J. China Univ. Pet. 39(4), 19–26 (2015)
Shiyue, C., Shun, Z., Yongshi, W., et al.: Lithofacies types and reservoirs of Paleogene fine-grained sedimentary rocks in Dongying Sag, Bohai Bay Basin. Pet. Explor. Dev. 43(2), 198–208 (2016)
Ma Yiquan, D., Xuebin, L.H., et al.: Characteristics, depositional processes, and evolution of shale lithofacies of the upper submember of Es4 in the Dongying Sag. Earth Sci J China Univ Geosci 42(7), 1195–1208 (2017)
Qin, Z., Xiaomin, Z., Chenxi, L., et al.: Classification and quantitative characterization of microscopic pores in organic-rich shale of the Shahejie Formation in the Zhanhua Sag, Bohai Bay Basin. Oil Gas Geol. 37(3), 422–432, 438 (2016)
Zhenxue, J., Tingwei, L., Houjian, G., et al.: Characteristics of low-mature shale reservoirs in Zhanhua sag and their influence on the mobility of shale oil. Acta Petrolei Sinica 41(12), 1587–1600 (2020)
Feng, Y., Zhengfu, N., Changpeng, H., et al.: Characterization of microscopic pore structures in shale reservoirs. Acta Petrolei Sinica, 34(2), 301–311 (2013)
Shun, Z., Huimin, L., Min, W., et al.: Pore evolution of shale oil reservoirs in Dongying sag. Acta Petrolei Sinica 39(7), 754–766 (2018)
Bo, L., Jiahui S., Yongqing, Z., et al.: Reservoir space and enrichment model of shale oil in the first member of Cretaceous Qingshankou Formation in the Changling Sag, southern Songliao Basin, NE China. Pet. Explor. Dev. 2021(2), 1–16 (2021)
Lihong, Z., Xianzheng, Z., Gongquan, C., et al.: Key exploration & development technologies and engineering practice of continental shale oil: a case study of Member 2 of Paleogene Kongdian Formation in Cangdong Sag, Bohai Bay Basin, East China. Pet. Explor. Dev. 47(5), 1059–1066 (2020)
Xianzheng, Z., Lihong, Z., Xiugang, P., et al.: Formation conditions and enrichment model of retained petroleum in lacustrine shale: a case study of the Paleogene in Huanghua depression, Bohai Bay Basin, China. Pet. Explor. Dev. 47(5), 856–869 (2020)
Guoqi, F., Jijun, L., Jiewen, L., et al.: Discussion on the enrichment and mobility of continental shale oil in Biyang Depression. Oil Gas Geol. 40(6), 1236–1246 (2019)
Zheng, L.: Comparison of oil-bearing properties and oil mobility of shale with different lithologies in continental basins: a case study of the upper fourth member of Paleogene Shahejie Formation in Dongying Sag, Bohai Bay Basin. Pet. Geol. Exp. 42(4), 545–551,595 (2020)
Wenzhong, H., Xianzheng, Z., Fengming, J., et al.: Sweet spots evaluation and exploration of lacustrine shale oil of the 2nd member of Paleogene Kongdian formation in Cangdong sag, Dagang Oilfield, China. Pet. Explor. Dev. 48(4), 1–10 (2021)
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Du, Xy., Dong, Cm., Lin, Cy., Ma, Pj., Li, Ga. (2022). Evaluation of Shale Oil Reservoir Capacity and Mobility Based on Rock Facies: A Case Study of Shahejie Formation in Dongying Sag. In: Lin, J. (eds) Proceedings of the International Field Exploration and Development Conference 2021. IFEDC 2021. Springer Series in Geomechanics and Geoengineering. Springer, Singapore. https://doi.org/10.1007/978-981-19-2149-0_1
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DOI: https://doi.org/10.1007/978-981-19-2149-0_1
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