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地质力学学报:2015,21(4):492-501
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东濮凹陷北部沙三段古压力恢复及油气运聚动力构成
(中国石油大学(华东)地球科学与技术学院, 山东青岛 266580)
PALEO-PRESSURE RESTORATION AND DYNAMIC MECHANISM FOR HYDROCARBON MIGRATION AND ACCUMULATION OF Es3 MEMBER IN NORTH DONGPU SAG
(School of Geosciences, China University of Petroleum, Qingdao 266580, Shandong, China)
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投稿时间:2015-02-11    
中文摘要: 综合应用流体包裹体法和盆地模拟法,恢复了东濮凹陷北部沙三段古压力,并分析了成藏期油气运聚动力构成。研究结果表明,沙三段超压分布受构造格局、沉降中心、生烃中心控制明显,超压幅度表现为洼陷区大、中央隆起带次之、西部斜坡带最小,受盐岩层发育影响,濮卫-文留地区盐岩下部层系表现为压力系数高值区。成藏期超压和浮力是研究区沙三段油气运聚的主要动力,压力过渡带和正常压力带是油气的主要聚集场所。研究区主要存在超压驱动、超压-浮力联合驱动和浮力驱动等3种类型的驱动机制,其中斜坡带和洼陷带等超压带主要为超压驱动,部分中央隆起带上的压力过渡带为超压-浮力联合驱动,西部斜坡带和部分中央隆起带等正常压力带主要为浮力驱动。
Abstract:With the application of fluid inclusions and basin simulation method, we restored the paleo-formation pressure of the third member of Shahejie formation (Es3) in North Dongpu sag, and analyzed the dynamic mechanism for hydrocarbon migration and accumulation. The results showed as follows:The formation pressure of Es3 during accumulation period was mainly controlled by the structural framework and the centers of subsidence and hydrocarbon generation, and the overpressure amplitude was largest in the sub-sag area with relatively larger in the central uplift belt and smallest in the west slope area. Controlled by the salt layer, the residual pressure of the lower formation was relatively high in Puwei and Wenliu. The overpressure and buoyancy were the main driving forces for the hydrocarbon accumulation of Es3, and the normal pressure zone and transitional zone were the main hydrocarbon accumulation places. There are three types of dynamic mechanism for hydrocarbon migration and accumulation in the study area including overpressure drive, overpressure-buoyancy drive and buoyancy drive. Overpressure zone including the slope zone and the sub-sag zone is mainly overpressure driven. Overpressure transition zone including part of the central uplift belt is mainly overpressure-buoyancy driven. And normal pressure zone including the west slop and part of the central uplift belt is mainly buoyancy driven.
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基金项目:国家科技重大专项(2011ZX05006-004)
引用文本:
朱荣伟,蒋有录,刘景东,胡洪瑾,许娟娟.东濮凹陷北部沙三段古压力恢复及油气运聚动力构成[J].地质力学学报,2015,21(4):492-501DOI:
ZHU Rong-wei,JIANG You-lu,LIU Jing-dong,HU Hong-jin,XU Juan-juan.PALEO-PRESSURE RESTORATION AND DYNAMIC MECHANISM FOR HYDROCARBON MIGRATION AND ACCUMULATION OF Es3 MEMBER IN NORTH DONGPU SAG[J].,2015,21(4):492-501DOI:

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