水泥-地层界面胶结状况综合解释方法及应用

A Comprehensive Evaluating Method for the Cement-Formation Interface and its Application.

油、水井固井质量评价中 ,利用地层波的强弱进行固井 界面胶结评价存在一定缺陷。针对这种情况 ,利用声波变密度测井和伽马密度测井资料 ,同时考虑到反映岩性变化的自然伽马测井曲线与地层波衰减的一致性 ,对固井 界面胶结状态进行综合分析。编制了综合评价解释软件 ,在大庆油田西 2 - PX井等 4口井固井质量解释中应用 ,取得了较好的效果。

In cement bond evaluation for oil wells and water injection wells, there are some shortages in using the amplitude of pipe arrivals and formation arrivals for the evaluation of the cement-formation interface. The cement-formation interface is comprehensively evaluated with information from the Gamma Density Logging and Acoustic Variable Density logging. The consistence between variety of lithology in Gamma Ray log and attenuation of formation arrivals is also concerned in this article. We also design a comprehensive interpretation program. It is proved that this comprehensive evaluation method has got expected effect in its application in four wells in Daqing Oilfield including W2-PX.