泥浆侵入地层中高分辨率感应测井响应特征的正演分析
仵杰;冯娟;解茜草;李博博;赵玲;牒勇
【期刊名称】《测井技术》 【年(卷),期】2009(033)003
【摘要】The separation extent of different curves of depth of investigation in array induction logging shows the conditions of mud invasion and formation permeability. The response character of HDIL in step and gradual transition invasion formation are simulated using three-layer forma-tion model with invasion. In step invasion formation, when the ratio of invasion resistivity to for-mation resistivity is less than 0.5, 6 different investigation depth curves present normal order from shallow to deep investigation, the reading of the shallow investigation is less than the deep one. When the ratio is greater than 2.0, investigation curves show opposite order with the order of less than 0.5. When the ratio is between 0.5 and 2.0, curves are abnormal order in shallow in-vasion formation, only in deep invasion formation the curves appear reasonable order. In gradual transition formation, when the ratio is between 0.5 and 2.0, the change of transition zone has lit-tle effect on responses. When the ratio is greater than 2.0 or less then 0.5, 10 in and 20 in curves are changed obviously, but influence on 90 in and 120 in curves is still small. These conclusions can be used to analyze the separate character of high definition induction logging curves.%高分辨
泥浆侵入地层中高分辨率感应测井响应特征的正演分析
