| 转换伸展型盆地异常压力的分布与成因机制分析:以惠民凹陷临南洼陷为例 |
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| 引用本文： | 刘晓峰.转换伸展型盆地异常压力的分布与成因机制分析:以惠民凹陷临南洼陷为例[J].地质科技情报,2011,30(5):1-4,11. |
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| 作者姓名： | 刘晓峰 |
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| 作者单位： | 中国地质大学构造与油气资源教育部重点实验室,武汉430074;中国地质大学资源学院,武汉430074 |
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| 基金项目： | 国家自然科学基金项目(40402014) |
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| 摘 要： | 利用370口钻井试油实测(DST)压力数据分析了临南洼陷异常压力的分布特征和异常低压的成因机制.临南洼陷不仅发育低压,而且存在超压.低压在井深1300～4000 m区间内普遍发育；超压出现在井深3200～4400 m区间内.沙三段的低压和超压共存.异常压力的分布与转换伸展型盆地的应力场密切相关.低压主要分布在转换伸展型盆地的最大伸展区域,超压主要沿挤压轴方向展布,且靠近洼陷中央.转换伸展断裂的泵吸作用导致流体低压和低压油气藏的形成.
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| 关 键 词： | 低压 超压 转换伸展型盆地 流体泵吸作用 临南洼陷 |
Distribution and Origin of the Abnormal Pressure in a Transtensional Basin:A Case Study from Linan Subsag,Huimin Sag |
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| LIU Xiao-feng.Distribution and Origin of the Abnormal Pressure in a Transtensional Basin:A Case Study from Linan Subsag,Huimin Sag[J].Geological Science and Technology Information,2011,30(5):1-4,11. |
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| Authors: | LIU Xiao-feng |
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| Institution: | LIU Xiao-fenga,b(a.Key Laboratory of Tectonics and Petroleum Resources of Ministry of Education,b.Faculty of Earth Resources,China University of Geosciences,Wuhan 430074,China) |
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| Abstract: | Abnormal pressure in transtensional basins are sparsely described in the literature.Based on the data of drill stem test(DST) from 370 drills in Linan Subsag,this paper discusses the distribution and origin of abnormal pressure.It is found that there not only exists prominent underpresure,but also develops overpressure in the transtensional Linnan Subsag.The underpressure ranges from 1 300 to 4 000 m depth,and the overpressure occurs from 3 200 to 4 400 m depth,with the maximum pressure coefficient about 1.... |
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| Keywords: | underpressure overpressure transtensional basin fluid pumping Linnan Subsag |
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