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  2. 地质与地球物理研究所
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  4. 中国科学院油气资源研究重点实验室
New understanding of overpressure responses and pore pressure prediction: Insights from the effect of clay mineral transformations on mudstone compaction

文献类型：期刊论文

作者Li, Chao1,2; Luo, Xiaorong1,2; Zhang, Likuan1,2; Fan, Caiwei3; Xu, Changgui3; Liu, Aiqun3; Li, Hu3; Li, Jun4; Lei, Yuhong1,2
刊名ENGINEERING GEOLOGY
出版日期2022-02-01
卷号297页码:24
关键词Clay mineral transformations Chemical compaction Normal compaction trend Loading-unloading curves Overpressure identification Pressure prediction
ISSN号0013-7952
DOI10.1016/j.enggeo.2021.106493
英文摘要Chemical compaction dominated by clay mineral transformations, commonly develops in deeply buried mud stones, and prominently affects the petrophysical properties of mudstones and fluid flow. This paper takes the Neogene mudstones in the Ledong Slope of the Yinggehai Basin as research object, analyzes the relationship between chemical compaction and overpressure, establishes a new multisegment normal compaction trends (NCTs) and reevaluates the overpressure mechanisms. The results show obvious clay mineral transformation with increasing depth, and the top of the clay mineral transformations is approximately equal to the depth of the overpressure. The logging responses of overpressured mudstones are affected by clay mineral diagenesis, showing a 45% increase in the sonic transit time at 3500-5000 m and a 10% decrease in the density at the same interval, and the density response exhibits a relative lag. A method comprising an inversion algorithm calibrated by measured pressure data is proposed to establish multisegment NCTs. Furthermore, new loading-unloading curves comprising a mechanical loading curve and chemical loading curve are established to reevaluate the overpressure mechanisms. The loading-unloading curves show that the pressure gradient generated by mudstone compaction maybe less than 1.8. While the pressure data with pressure gradient larger than 1.8 fall on the unloading curve, indicating elevated sandstone pressures rather than in situ mudstone pressures. The multi segment NCTs were proven to provide a satisfactory overpressure estimate in the Ledong Slope as well as the relative contribution of different overpressure mechanisms. This paper provides new insight into mudstone compaction and overpressure responses, as well as a meaningful reference for the identification of multiple overpressure generation mechanisms and the prediction of pore pressure in deeply buried formations.
WOS关键词MECHANICAL COMPACTION ; PHYSICAL-PROPERTIES ; CENOZOIC MUDSTONES ; SEDIMENTARY BASINS ; EFFECTIVE STRESS ; ROCK PROPERTIES ; ORGANIC-MATTER ; EGERSUND BASIN ; DIAGENESIS ; SMECTITE
资助项目Strategic Priority Research Program of the Chinese Academy of Sciences[XDA14010202] ; Key Research Program of the Institute of Geology and Geophysics, CAS[IGGCAS-201903] ; National Natural Science Foundation of China[42030808]
WOS研究方向Engineering ; Geology
语种英语
WOS记录号WOS:000787926800004
出版者ELSEVIER
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 ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS ; 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 ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS ; 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 ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS ; 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 ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS ; 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/132A11/105162]  
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Luo, Xiaorong; Zhang, Likuan
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resources Res, Beijing 100029, Peoples R China
2.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China
3.China Natl Offshore Oil Corp Ltd, Zhanjiang Branch, Zhanjiang 524057, Peoples R China
4.China Univ Geosci Wuhan, Sch Earth Resources, Wuhan 430074, Peoples R China
推荐引用方式
GB/T 7714		 Li, Chao,Luo, Xiaorong,Zhang, Likuan,et al. New understanding of overpressure responses and pore pressure prediction: Insights from the effect of clay mineral transformations on mudstone compaction[J]. ENGINEERING GEOLOGY,2022,297:24.
APA Li, Chao.,Luo, Xiaorong.,Zhang, Likuan.,Fan, Caiwei.,Xu, Changgui.,...&Lei, Yuhong.(2022).New understanding of overpressure responses and pore pressure prediction: Insights from the effect of clay mineral transformations on mudstone compaction.ENGINEERING GEOLOGY,297,24.
MLA Li, Chao,et al."New understanding of overpressure responses and pore pressure prediction: Insights from the effect of clay mineral transformations on mudstone compaction".ENGINEERING GEOLOGY 297(2022):24.

入库方式： OAI收割

来源：地质与地球物理研究所

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