元素俘获谱测井在储层评价中的应用

由于井眼条件、钻井液等因素的影响，利用常规测井资料处理得到的岩性剖面会存在一定偏差，造成储层孔隙度计算不精确甚至流体性质判别失误。斯伦贝谢公司提供的元素俘获谱测井（ECS）仪器能准确地识别地层岩性，利用其资料可以获得精确的地层岩性组分，结合密度和声波等常规测井资料可以准确计算地层孔隙度，判断出地层的流体性质，提升了测井解释的符合率。该仪器及资料处理方法经在川渝地区的实际应用，效果良好，有着较高的推广应用价值。

Application of Elementary-Capture-Spectroscopy (ECS) log to the reservoir evaluation

Being influenced by many factors like the borehole condition and drilling fluid, the lithological profile obtained by the conventional logs will be in disagreement with the actual, thus the porosity of reservoirs will be inaccurate and the discrimination of fluid property will be a big mistake. The Elementary Capture Spectroscopy (ECS) log tool provided by the Schlumberger was able to identify the formation lithology with precise results; when combined with standard logs like density and sonic, etc., the formation porosity was calculated in accuracy and the fluid content was determined as well. With a high coincidence rate in field practices in Sichuan and Chongqing gas fields, the ECS log has been proved to be practical and worthwhile for wide application.