中上扬子区膏岩盖层的测井识别

Well logging identification of gypsum cap rocks in middle-upper Yangtze region

针对中、上扬子区膏岩盖层测井响应特征,充分利用地质、录井、岩心分析、测井等资料,采用岩心刻度测井的方法,建立了膏岩盖层参数测井解释模型,并对该区膏岩盖层进行了测井解释与评价;建立了一套适合川东北地区膏岩盖层的测井识别方法,从而实现了盖层从定性识别到盖层参数的定量评价,为盖层的地球物理预测研究提供了重要的基础参数。

Based on well logging response characteristics of gypsum cap rocks in the middle-upper Yangtze region, with geology, well logging, core analysis and logging data, it was established in this paper a logging interpretation model of gypsum cap rock parameters using the core calibration logging method. The gypsum cap rocks in the study region were interpreted and evaluated. A new set of logging identification method suitable for gypsum cap rocks in the Northeast Sichuan Basin was put forward. The quali- tative identification and the quantitative evaluation of cap rocks were done, offering important basis parameters for the geophysical prediction researches of cap rocks.