孔隙度、渗透率与净覆压的规律研究及应用.docVIP

 HYPERLINK 50:90/~kjqk/xnsyxyxb/index.html 西南石油学院学报JOURNAL OF SOUTHWEST PETROLEUM INSTITUTE1999年 第21卷 第4期 Vol.21 No.4 1999 HYPERLINK 50:90/~kjqk/index.htm   孔隙度、渗透率与净覆压的规律研究和应用* 吴 凡，孙黎娟，何　江 摘要：研究油层条件下孔隙度、渗透率与其净覆盖压力之间的变化规律，更好地指导油田的开发与调整。利用新引进的80年代末期发展的研究高压孔、渗的新仪器CMS-300 岩心自动分析仪，对中原油田的天然岩心测试资料进行统计分析与研究。结果表明：油层孔隙度、渗透率与净覆压的关系以一元二次方程最为密切；孔隙度与净覆压间按指数规律拟合时，代表的物理意义更为明确，既能满足精度的要求，又能自动得出岩石的压缩系数。并提出了岩石的压缩系数与岩石的平均水力半径间呈幂律关系；净覆压下油层的渗透率与地面渗透率之比，仅与净覆压的大小有关，与地面渗透率的大小无关等新观点。关键词：孔隙度；渗透率；实验室试验；中原油田中图分类号：TE331.7　　　　　　　　　文献标识码：A 文章编号：1000-2643(1999)04-0023-03 THE RESEARCH AND APPLICATION OF PERMEABILITY, POROSITY AND NET OVERBURDEN PRESSURE LAWS WU Fan (Zhongyuan Petroleum Exploration Bureau), SUN Lijuan, HE JiangJOURNAL OF SOUTHWEST PETROLEUM INSTITUTE, VOL. 21, NO. 4, p 23-25, 1999 (ISSN1000-2634, IN CHINESE) 　　Studying the variation of porosity, permeability and the net overburden pressure in formation, can guide the development and modification of oilfields, to statistical and analysis and research on the natural core data of Zhongyuan oilfield by using the newly introduced cmx-300, the core automatic analyzer developed in late 1980 and applied to study high-pressure porosity and permeability were made. The research shows that the relationship between formation porosity, permeability and net overburden pressure is closely related to univariate quadratic equation; when porosity matches net overburden pressure with exponent relationship, the presented physical significance is clearer, the accuracy requirement can be met and the compressibility of rocks can gained automatically. The compressibility and average hydraulic radius of the rocks is exponential is put forward; the ratio of permeability under the net overburden pressure and ground permeability is only related to the value of the overburden pressure, but nothing to do with the surface permeability.　　Key Words: porosity, permeability, net overburden pressure, laboratory testing, Zhongyuan oil field 　　流体静力压缩仪即