博兴洼陷高89块沙四上亚段砂岩输导体系研究

Study on sandstone transport system of the upper part of the fourth member of Shahejie Formation in Gao 89 block of Boxing Subsag

砂岩输导体系作为一种主要的油气输导体系,在博兴洼陷油气运移中起着重要作用。在分析博兴洼陷高89块地质背景的基础上,综合利用地震、钻井岩心、地层测试、测井、分析化验等资料,运用地质建模方法建立该区块沙四上亚段三维空间等时地层格架模型,然后通过沉积相建模做出砂体空间展布图,并以沉积相为约束条件建立砂体的孔隙度和渗透率模型,最后结合该区块砂体连通性及有效储层物性下限分析认为,纯下次亚段1砂组物性最好,高89井、樊142井和樊5-3井附近砂体最为发育且物性好,可作为优势输导体系,通过断层封堵可成为有利的油气聚集区。

Sandstone transport system, as one of the main hydrocarbon transport system, is very important for hydrocarbon migration in Boxing Subsag. Based on the geologic setting, combined with the data of seismic, well drilling cores, formation test, logging and analysis testing, the geological modeling method was applied to establish the 3D isoehronous stratigraphic framework model of Es41 in Gao 89 block. Then the sand body distribution map was drawn by sedimentary facies modeling, and porosity model and permeability model were established under the constraint of sedimentary facies. At last, by analyzing sand body connectivity and reservoir property limit, it is considered that the reservoir properties of the sand group 1 of Chunxia sub-member are better than others. Sand bodies near Gao 89, Fan 142 and Fan 5-3 wells are favorable transport systems and hydrocarbon accumulation areas.