侵入深度对测井估算油气饱和度的影响  

Effect of Invasion Depth on Oil/Gas Saturation Computation.

作　　者：孙建孟[1] 黄隆基[1] 

机构地区：[1]石油大学资源系

出　　处：《测井技术》1999年第2期116-119,共4页Well Logging Technology

摘　　要：孙建孟，黄隆基．侵入深度对测井估算油气饱和度的影响．测井技术，１９９９，２３（２）：１１６～１１９在分析泥浆侵入机理的基础上，采用渗透力学中的Ｂ－Ｌ理论对油层和气层侵入问题进行了初步的理论计算研究。计算结果揭示侵入影响使饱和度剖面呈指数下降趋势，为此初步构造了指数函数式饱和度侵入剖面，并用一口井进行了初步验证。这样构造的目的在于克服侵入深度对各种方法估算气层、低阻油气层等复杂油气层饱和度的影响，同时对理论计算结果起到验证作用。Based on the analysis of mud invasion mechanism, B L theory of percolation mechanics is used to deal with the problem of mud invasion in oil/gas layers. The theoretically computed results show that the invasion effect makes the water saturation descend exponentially with distance away from borehole. Therefore, an exponentially descending water saturation function is put forward for saturation computation, and a case study is also given. This method not only can eliminate the effect of invasion depth on water saturation computation for gas zone and low contrast resistivity formation, but also verify the theoretically computed results.

关 键 词：侵入深度 油气饱和度 测井估算 油层 

分 类 号：TE15[石油与天然气工程—油气勘探] TE311