孙永杰
SUN Yongjie

• 1:中国石化胜利油田分公司勘探开发研究院

摘要(Abstract)：

常规渗透率测试室内实验因其经济、快速而被广泛应用,但受实验条件制约,无法准确模拟致密气藏状态,使测得的渗透率值远大于气藏状态下渗透率值,并造成致密气藏储层测试渗透率精度偏低。基于岩心渗透率测试实验流程,分析了净上覆压力、滑脱效应、含水饱和度对常规测试渗透率值的影响。通过对常规渗透率值进行单因素修正,建立了测试渗透率值与修正渗透率值之间的数学公式,并形成了致密气藏储层渗透率值的校正方法。结果表明:致密气藏条件下的渗透率值小于常规测试渗透率值;随着净上覆压力、含水饱和度的增加以及滑脱效应的减小,测试渗透率值逐渐减小;校正后的渗透率值与地层条件下测得的渗透率值差异不大,能够满足工程计算的需要。
Due to the economy and rapid speed,the indoor experiment of conventional permeability test is widely used. But constrained by the experimental conditions,there is no way to accurately simulate the state of the tight gas reservoir,thus the tested permeability value is far bigger than that in the gas reservoir state,and moreover the tested precision of the tight gas reservoir is rather lower. Based on the experimental process of the core permeability test,the influences of the net overburden pressure,slippage effect and water saturation on the conventional permeability tested value were analyzed. With the help of the single-factor correction of the conventional permeability value,The mathematical formula between the tested and modified permeability values was established,and the correcting method of the tight gas reservoir permeability value was developed. The results show that the permeability value under the condition of the tight gas reservoir is less than that of the conventional tested permeability value; with the increase of the net overburden pressure,water saturation and the decrease of the slippage effect,the tested value decreases as well; the corrected permeability value is not so different from the permeability value tested under the formation condition and can satisfy the needs of the engineering calculation.

关键词(KeyWords)： 渗透率;净上覆压力;滑脱效应;含水饱和度;校正方法;致密气藏
permeability;net overburden pressure;slippage effect;water saturation;correcting method;tight gas reservoir

Abstract:

Keywords:

基金项目(Foundation): 国家科技重大专项“胜利油田特高含水期提高采收率技术”(2016ZX05011-001)

作者(Author): 孙永杰
SUN Yongjie

DOI: 10.19597/J.ISSN.1000-3754.201801067

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