歧口凹陷歧深地区古近系多层超压体系特征  

Characteristics of the Paleogene multi-layer overpressure system in the Qishen area,Qikou depression

作　　者：毛凯楠[1] 解习农[1] 肖敦清[2] 杜学斌[1] 雷振宇[1] 

机构地区：[1]中国地质大学,湖北武汉430074 [2]中油大港油田分公司,天津大港300280

出　　处：《特种油气藏》2010年第6期38-41,共4页Special Oil & Gas Reservoirs

基　　金：国家自然科学基金项目"松辽盆地北部异常高压和异常低压环境成岩响应对比研究"(40872076);湖北省自然科学基金重点项目"异常压力盆地流体动力学及其聚集关系研究"(2008CDA095)

摘　　要：通过钻井实测储层压力、测井资料计算泥岩压力以及地震资料计算的地层压力的分析,查明了歧深地区超压体系空间展布。研究结果表明:纵向上,地层压力结构可划分为静水压力体系、上部超压体系和下部超压体系;平面上,在北大港东翼、歧口凹陷及部分板桥凹陷均显示超压,且在凹陷深部出现明显的2个超压体系;超压体系的出现不仅有效抑制了深层砂体的压实作用,而且对深部油气藏运移和聚集起到有效的控制作用。准确地识别歧深地区超压体系的展布对该区油气勘探具有重要的指导作用。Spatial distribution of the overpressure system in the Qishen area of the Qikou depression is revealed through analysis of reservoir pressure measured during drilling,shale pressure calculated from log data and formation pressure calculated from seismic data.The research results indicate that the formation pressure system can be vertically divided into hydrostatic system,upper overpressure system and lower overpressure system;laterally,overpressure shows in east Beidagang flank,Qikou depression and part of Banqiao depression,and two obvious overpressure systems appear in the deep Qikou depression;the overpressure systems had restrained the compaction process of deeper sands,and controlled hydrocarbon migration and accumulation in deeper reservoirs.Accurate identification of spatial distribution of overpressure systems is helpful to hydrocarbon exploration in the Qishen area.

关 键 词：超压体系 油气聚集 古近系 歧深地区 黄骅坳陷 

分 类 号：TE121.3[石油与天然气工程—油气勘探]