摘要
多矿物模型分析方法是基于测井参数与矿物含量建立的函数关系式,采用最优化数学方法求取地层岩性。统计沁水盆地煤层气勘探26口标准井的7个常规测井参数,通过交会图分析,确定GR(自然伽马)、CNL(补偿中子)、DEN(体积密度)和AC(声波时差)为模型参数值;并根据地质录井资料来确定矿物成分,建立岩性分析模型。利用该模型对该区300余口井的测井资料进行岩性解释,经地质录井资料检验,其对煤层、砂岩、灰岩及泥岩解释的准确率达到90%以上。
The multi-mineral model analysis is a functional relation expression established on the basis of well logging parameters and mineral content, using optimized mathematical approach to get strata lithology. Through statistics of 7 routine parameters of 26 type wells in Qinshui Basin CBM exploration, using cross-plot analysis determined GR（gamma ray）, CNL（compensated neutron log）, DEN（bulk density） and AC（acoustic differential time） as model parameters, also geological logging to determine mineral components, established lithology analytical model. Using the model carried out lithological interpretation for logging data from 300 more wells in the area. Through geological logging data inspection, the accuracies of interpretation for coal seam, sandstone, limestone and mudstone can be over 90 %.
出处
《中国煤炭地质》
2015年第8期73-77,共5页
Coal Geology of China
基金
十二五国家科技重大专项(ZKTFWZDZX-14-103)
关键词
多矿物模型分析
交会图
岩性解释
测井
multi-mineral model analysis
cross-plot
lithological interpretation
well logging
