义和庄地区潜山内幕构造演化特征及其控藏作用

Tectonic evolution characteristics of inner buried hills in Yihezhuang area and its controlling effect on the hydrocarbon accumulation

济阳坳陷义和庄地区潜山内幕构造演化复杂、控藏作用不明,制约着该区潜山内幕油气勘探。综合地震、测井、岩性及分析化验等资料开展了义和庄地区潜山内幕构造演化特征分析,并据此评价了构造演化对油气成藏的控制作用。结果表明,研究区潜山经历了印支运动挤压抬升、燕山运动Ⅰ幕挤压、燕山运动Ⅱ幕拉张沉降、燕山运动Ⅲ幕挤压抬升以及喜马拉雅运动拉张沉降这一演化过程;义古991断层为潜山内幕典型同沉积断层,其断层活动速率验证了潜山的构造演化过程;多期次不同应力性质的构造演化使潜山内幕断层经历了多个逆冲、负反转阶段;潜山内幕的多期构造演化过程有利于优质储层和高效输导体系的形成,同时多期构造演化过程与内幕隔层相匹配有利于形成良好的储盖组合与多种圈闭类型。在构造演化分析、有利输导体系预测与有利圈闭描述的勘探思路指导下,成功发现了义古72和义古65块等潜山内幕油藏。

Tectonic evolution is complicated and its effect on hydrocarbon accumulation is unclear for inner buried hills in Yihezhuang area of Jiyang depression,which is restricting oil and gas exploration in this area. To solve this problem,tectonic evolution characteristics of the inner buried hills was analyzed in Yihezhuang area based on data of seismic,logging,li?thology and test,by which the effect of tectonic evolution on hydrocarbon accumulation was evaluated. The result shows that buried hills in Yihezhuang area evolved as following:compressional uplift in Indo-China movement,compression inphase Ⅰ of the Yanshanian movement,extensional subsidence in phase Ⅱ of the Yanshanian movement,compressional uplift in phase Ⅲ of the Yanshanian movement,and again extensional subsidence in Himalayan movement. Fault Yigu991 isa typical contemporaneous fault of inner buried hills in the researching area,and its fault activity rate verifies the tectonic evolution process of the buried hills. The fault of inner buried hills experienced multiple thrust and negative inversion stages under the influence of tectonic evolution that was characterized by many different stress properties. Multi-period tecton?ic evolution process of inner buried hills is beneficial to the formation of favorable reservoir and effective petroleum migration pathways,and multi-period tectonic evolution,which is well-matched with interior barriers,is beneficial to the forma?tion of favorable reservoir-cap combinations and multiple trap types. The researching result guides oil and gas exploration of inner buried hills in researching area powerfully. With the guidance of tectonic evolution analysis,effective petroleum migration pathways prediction and favorable traps were described,the inner buried hill reservoir such as Yigu72 and Yigu65 were found successfully.