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Identification and Prediction of Allo-Source Overpressure Caused by Vertical Transfer: Example from an HTHP Gas Reservoir in the Ledong Slope in the Yinggehai Basin

文献类型：期刊论文

作者Fan, Caiwei2; Xu, Changgui2; Li, Chao1; Liu, Aiqun2; Li, Hu2; Hou, Jingxian2; Zhang, Xiaoying4; Lu, Bin4; Li, Jun3
刊名GEOFLUIDS
出版日期2021-04-27
卷号2021页码:20
ISSN号1468-8115
DOI10.1155/2021/6657539
英文摘要The Yinggehai Basin is a typical high temperature and high pressure (HTHP) gas-bearing basin. The pressure coefficient exceeds 2.2 in deeply-buried Miocene reservoirs in the Ledong Slope, a nondiapir zone in the Yinggehai Basin. Determining the overpressure mechanisms and predicting the pore pressure are key issues for natural gas exploration and development in the Ledong Slope. In this paper, overpressure mechanisms were investigated according to the analysis of vertical effective stress-logging responses and geological evaluations, and the pore pressure was predicted using the Bowers method. The loading-unloading crossplots indicated that the overpressure that existed in reservoirs mainly consists of two types: neighbor-source and allo-source overpressure. The neighbor-source overpressure is mainly caused by the pressure transmission from the adjacent mudstone to the reservoir, with a pressure coefficient less than 1.5 similar to 1.6. The high-magnitude overpressure points with pressure coefficients greater than 1.6 show a typical unloading response, indicating elevated sandstone pressures rather than in situ mudstone pressures, which are most likely to be generated by overpressure vertical transfer. The high-magnitude overpressure fluid generated by the high mature ultradeep buried N(1)s source rock migrated to the shallower reservoirs via hidden faults/microfractures, which led to the vertical transfer of overpressure. Vertically transferred overpressure was generated at 1.5 similar to 0.2 Ma, which is beneficial for the preservation of overpressure in lenticular sandbodies. The estimated pore pressure by the Bowers method is in good agreement with the measured pressure and provides a meaningful reference for predrilling pressure prediction in nondiapir or diapir zones in the Yinggehai Basin.
WOS关键词PORE-PRESSURE PREDICTION ; IN-SITU STRESS ; NATURAL-GAS ; MECHANISMS ; FIELD ; COMPACTION ; MIGRATION ; GENERATION ; MAGNITUDE ; CRACKING
资助项目Strategic Priority Research Program of the Chinese Academy of Sciences[XDA14010202] ; National Science and Technology Major Project[2017ZX05008-004] ; National Natural Science Foundation of China[U20B2014]
WOS研究方向Geochemistry & Geophysics ; Geology
语种英语
WOS记录号WOS:000664975000001
出版者WILEY-HINDAWI
资助机构Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; National Science and Technology Major Project ; National Science and Technology Major Project ; National Science and Technology Major Project ; National Science and Technology Major Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; National Science and Technology Major Project ; National Science and Technology Major Project ; National Science and Technology Major Project ; National Science and Technology Major Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; National Science and Technology Major Project ; National Science and Technology Major Project ; National Science and Technology Major Project ; National Science and Technology Major Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; National Science and Technology Major Project ; National Science and Technology Major Project ; National Science and Technology Major Project ; National Science and Technology Major Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
源URL[http://ir.iggcas.ac.cn/handle/132A11/101969]  
专题地质与地球物理研究所_中国科学院油气资源研究重点实验室
通讯作者Li, Chao
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resources Res, Beijing 100029, Peoples R China
2.China Natl Offshore Oil Corp Ltd, Zhanjiang Branch, Zhanjiang 524057, Peoples R China
3.China Univ Geosci Wuhan, Sch Earth Resources, Wuhan 430074, Peoples R China
4.Dimue Technol Ltd, Wuhan 430071, Peoples R China
推荐引用方式
GB/T 7714		 Fan, Caiwei,Xu, Changgui,Li, Chao,et al. Identification and Prediction of Allo-Source Overpressure Caused by Vertical Transfer: Example from an HTHP Gas Reservoir in the Ledong Slope in the Yinggehai Basin[J]. GEOFLUIDS,2021,2021:20.
APA Fan, Caiwei.,Xu, Changgui.,Li, Chao.,Liu, Aiqun.,Li, Hu.,...&Li, Jun.(2021).Identification and Prediction of Allo-Source Overpressure Caused by Vertical Transfer: Example from an HTHP Gas Reservoir in the Ledong Slope in the Yinggehai Basin.GEOFLUIDS,2021,20.
MLA Fan, Caiwei,et al."Identification and Prediction of Allo-Source Overpressure Caused by Vertical Transfer: Example from an HTHP Gas Reservoir in the Ledong Slope in the Yinggehai Basin".GEOFLUIDS 2021(2021):20.

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来源：地质与地球物理研究所

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