| 渤海湾盆地渤中坳陷储层超压特征与成因机制 |
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| 引用本文： | 刘晓峰,解习农,张成.渤海湾盆地渤中坳陷储层超压特征与成因机制[J].地球科学,2008,33(3):337-341. |
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| 作者姓名： | 刘晓峰 解习农 张成 |
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| 作者单位： | 中国地质大学资源学院 湖北武汉430074 |
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| 基金项目： | 国家自然科学基金
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国家自然科学基金 |
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| 摘 要： | 对储层超压的分析,有助于理解渤中坳陷油气晚期快速成藏机理.利用RFT实测储层压力资料分析了渤中坳陷储层超压的特征和成因.渤中坳陷存在3套储层超压系统:浅层明化镇组-馆陶组储层超压系统、中层东营组-沙河街组-孔店组储层超压系统、基底(中生界及以下地层)储层超压系统.渤中坳陷的储层超压可能主要是由3种机制综合引起的,即不均衡压实作用、超压传递作用和裂解气的生成作用.少量保存的传递超压是深部超压流体注入的"化石",它是超压背景下油气快速充注成藏的结果.
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| 关 键 词： | 储层超压 传递超压 裂解气 快速成藏 渤中坳陷 |
| 文章编号： | 1000-2383(2008)03-0337-05 |
| 修稿时间： | 2008年2月25日 |
Characteristics and Generation of the Reservoir Overpressure in Bozhong Depression,Bohai Bay Basin |
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| LIU Xiao-feng,XIE Xi-nong,ZHANG Cheng.Characteristics and Generation of the Reservoir Overpressure in Bozhong Depression,Bohai Bay Basin[J].Earth Science-Journal of China University of Geosciences,2008,33(3):337-341. |
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| Authors: | LIU Xiao-feng XIE Xi-nong ZHANG Cheng |
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| Abstract: | The analysis of fluid migration and rapid hydrocarbon accumulation is essential for exploring distribution of overpressure and probing into its generaion.Based on the RFT of many drills in Bozhong depression,the characteristics and generation of reservoir overpressure have been discussed in this paper.Three reservoir overpressure systems have been identified in the Bozhong depression:an upper reservoir overpressure in Guantao Formation-Minghuazhen Formation,a middle reservoir overpressure in Dongying Formation-Shahejie Formation-Kongdian Formation,and a lower reservoir overpressure in base(Pre-Cenozoic).Detailed investigation of reservoir overpressure in the Bozhong depression shows that overpressure probably is the result of a combination of following three mechanisms:mechanical compaction disequilibrium,overpressure transference and thermal cracking.Transfer overpressure maybe is common in subsurface reservoirs,but recognizable transfer overpressures are infrequent.A few transfer overpressures preserved in reservoirs at shallower depths named "overpressure fluid fossil",resulted from deeper overpressured fluid charging,helps us to understand the rapid petroleum accumulation in overpressured sedimentary basins. |
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| Keywords: | reservoir overpressure transfer overpressure thermal cracking rapid petroleum accumulation Bozhong depression |
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