2017年10月第36卷第5期
大庆石油地质与开发
Petroleum Geology and Oilfield Development in Daqing
DOI:10.19597/J.ISSN.1000-3754.201612013
0et.，2017 Vol. 36 No. 5
致密砂岩毛管力曲线计算相渗的分形维数方法
主郝俊兰
王建夫王秀宇董万青濮御杨文胜
（中国石油大学石油工程学院，北京102249）
摘要：致密砂岩相渗曲线在模拟致密油形成，以及油气田勘探开发中具有重要作用，而由于渗透率极低难以实验测得。为此，利用致密砂岩岩心压汞数据，通过分形理论并经过归一化和非标准化计算得到典型致密砂岩油驱水相渗曲线。研究表明：致密砂岩岩心Igp。与IgS线性拟合程度高，具有很好的分形性质，分形维数分布在 2.536~2.734；得到的相渗曲线束博水饱和度高达70%，两相流动区窄，总有效渗透率低，表明两相渗流情况复杂；计算的相渗曲线与实验测得的油驱水的相渗曲线比较接近，所以可用于致密油运移和聚集过程的数值模拟
研究。研究成果为高效开发致密油气截提供了重要理论基础。关键词：分形维数；致密砂岩；毛管力曲线；相渗曲线
文章编号：1000-3754（2017）05-0164-05
中图分类号：TE312
文献标识码：A
CALCULATINGMETHODOFTHEFRACTALDIMENSIONSOFTHE
RELATIVEPERMEABILITYBYTHECAPILLARYPRESSURECURVEOF
THETIGHTSANDSTONE
WANG Jianfu,WANG Xiuyu,DONG Wanqing,PU Yu,YANG Wensheng,HAO Junlan(College of Petroleum Engineering, China University of Petroleum, Beijing 102249, China)
Abstract : The relative permeability curves of the tight sandstone derived from the simulation of the tight oil possess significant impacts in the exploration and development of the oil and gas field. However, it is fairly difficult to ob-tain for the permeability is extremely lower. Therefore with the help of the mercury penetration data of the tight sandstone cores and fractal theory, through normalizing and non-standardizing computations, the typical relative permeability curves were achieved for the oil-flooded tight sandstones by the water. The research shows that the line-ar match between the lgp,-lgS is pretty higher for the tight sandstone cores and moreover the fractal property is greatly better, the fractal number is between 2. 5362. 734. The obtained connate water saturation derived from the relative pemeability curves can reach as high as 70%, the two-phase flow area is narrow and the total effective per-meability is rather lower, these mean that the two-phase flow is very complicated. Compared with the actually meas-ured oil-flooded relative permeability curves, the calculated ones are pretty closer, therefore all the achievements can be adopted in the numerical simulation study of the migration and accumulation of the tight oil, so the important
收稿日期：2016-12-28
改回日期：2017-06-25
基金项目：国家自然科学基金重点项目“致密砂岩微米、纳米级孔喉网格系统石油、运移和聚集机理”（41330319)；国
（0）6
作者简介：王建夫，男，1989年生，在读硕士，研究方向为致密油渗吸提高采收率。E-mail：404732545@qq-com
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