摘要
研究油藏内部油水渗流方向时,主要考虑渗透率影响,引入两个水平方向渗透率比、水平与垂向渗透率比参数来分析。前者反映样品所在储层平面上两个水平方向渗流能力的差异,后者反映样品所在储层水平与垂向渗流能力的差异,并经小柱样测试和全岩心测试两种方法确定两个参数。通过对塔中4号油藏CⅠ油组9口井2306个样品两种渗透率比值分布直方图分析,研究了CⅠ油组渗透率的非均质性及其渗流方向:CI油组储层在水平方向的渗流能力有很大差异,具有明显的方向性。储层垂向渗流能力明显小于水平方向的渗流能力。
In many methods to study oil and water seepage flow direction ,the paper introduces two parameters considering permeability: (1)horizontal permeability?to?horizontal permeability ratio ,(2) vertical permeability to?horizontal permeability ratio?The former illustrates the difference between horizontal permeability and horizontal permeability. The later describes the difference between vertical permeability and horizontal permeability. They are tested by small columnar samples test and Whole??Core Test. The paper has studied permeability heterogeneity and seepage flow direction through the permeability distribution bar graph of 9 wells , 2036 samples in CI Group of No.4, Tazhong oil reservoir:there are directions in the horizontal flow , vertical permeability is smaller than horizontal permeability.
关键词
油水渗流方向
小柱样测试
伞岩心测试
油藏
渗透率分布
非均质性
oil and water seepage flow direction
horizontal permeability-to-horizontal permeability ratio
vertical permeability-to-horizontal permeability ratio
small columnar samples test
whole-core test
