岩性油气藏 ›› 2015, Vol. 27 ›› Issue (1): 3943.doi: 10.3969/j.issn.1673-8926.2015.01.006
邓 泳,杨 龙,李 琼,王玉梅,胡冰艳
摘要:
油层条件下岩石的孔隙度和渗透率与净上覆压力的关系是储量计算和油气田开发研究的重要内容。 利用 CMS-300 覆压测试系统,根据岩心压汞、铸体薄片、扫描电镜及场发射等多项实验分析资料,研究了致密油在地层条件下的孔隙度和渗透率与净上覆压力的关系,同时为分析致密油与低孔、低渗储层的差异,还对低孔、低渗储层岩心进行了实验。 研究结果表明: ① 随着净上覆压力的增加,覆压孔隙度和覆压渗透率均与净上覆压力呈幂函数递减关系; ② 与低孔、低渗储层相比,压实作用对致密油造成的孔隙度和渗透率的损失率均较小; ③ 恢复压力后,致密油的孔隙度和渗透率基本能恢复到初始值,岩样具有较好的弹性。
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