石油地球物理勘探2025，Vol.60Issue(3)：739-751,13.DOI:10.13810/j.cnki.issn.1000-7210.20240188
页岩页理缝岩石物理建模方法及应用
Rock physical modeling and its application shale lamellation cracks
摘要
Abstract
Continental shale oil has become the major unconventional oil resource in China.The reservoir fea-tures include the development of lamellation crack,low porosity,large difference between horizontal and verti-cal permeability,and complex pore structure.Therefore,clarifying the relationship between the elastic and physical parameters of shale oil reservoirs is important.In addition,there are few studies on the characteristics of shale lamellation crack and its influencing factors.Based on anisotropic background media,a rock physical modeling method for fracture-porosity shale rich in kerogen is proposed in this paper.Through rock physical modeling,the effects of matrix porosity,aspect ratio,connectivity coefficient and the lamellation crack length,width and numbers of the shale are compared and analyzed.The results show that the P wave velocity is greatly affected by the connectivity coefficient,while the S wave velocity is not affected by the connectivity coefficient.The effect of lamellation crack over 100 microns should not be ignored and its induced anisotropy could not be summarized as the effect of intrinsic anisotropy.Vp/Vs positively correlates with the length of lamellation crack,while the relationship with the number of lamellation crack decreases first and then increases.The method in this paper is applied to the logging data of a practical working area.The P-wave velocity and S-wave velocity prediction in shale reservoirs through this method are highly consistent with actual data,which verifies the effectiveness and applicability of the proposed method,and the method can be used as a bridge in the charac-terization of unconventional oil and gas reservoirs.关键词
页岩储层/岩石物理建模/页理缝/弹性参数/纵横波速度比Key words
shale reservoir/rock physical model/lamellation crack/elastic parameter P-and S-wave velocity ratio分类
天文与地球科学引用本文复制引用
邹嘉齐,陈双全,杨志芳,卢明辉,晏信飞..页岩页理缝岩石物理建模方法及应用[J].石油地球物理勘探,2025,60(3):739-751,13.基金项目
本项研究受国家自然科学基金项目"页岩气储层甜点预测地球物理理论与方法研究"(41574108)、"基于孔隙结构参数约束的碳酸盐岩油藏储层表征方法研究"(42174130)及中国石油集团专项"物探应用基础实验和前沿理论方法研究"(2022DQ0604-03)联合资助. （41574108）
