摘要
宽能域中子伽马能谱测井解释软件PRIME只能计算高岭石、蒙脱石、绿泥石和云母等4种黏土矿物成分,而大庆油田中浅层的黏土矿物中几乎不含云母,主要成分以伊利石为主,故需要建立新的泥岩模型。通过研究PRIME软件泥岩模型的计算方法,改进计算黏土矿物成分的方程组,得到以高岭石和伊利石为主、蒙脱石和绿泥石为辅的新泥岩模型。利用改进后的泥岩模型对大庆油田杏××井进行重新处理,并与改进前处理得到的结果进行对比。改进后的杏××井泥岩成分解释软件计算结果与该区块岩心分析结果更加接近,提高了泥岩模型的精度,更接近该地区的真实地质情况。
PRIME, the supporting software of the wide-range spectrometric neutron GR log, can calculate the relative content of only four kinds of clay minerals such as kaolinite, montmorillonite, chlorite and mica. While the clay minerals of the medium-sallow layers of Daqing oilfield are almost free of mica, which contain another main component of illite, so the relative content of clay minerals which is calculated by software PRIME does not meet the real situation of the medium-sallow layers of Daqing oilfield. So we need to build a new clay volume model in order to meet production needs. After researching the calculation method of PRIME, we improve the equations, and build a new clay volume model which primarily calculates kaolinite and illite with montmorillonite and chlorite calculation as supplementary. We use the improved clay volume model to do re-interpretation of Xing X X well in Daqing oilfield, and compared the interpretation results with the results from the old PRIME software. The analysis shows that the clay composition explanation results with improved clay volume model are closer to the core analysis. The new clay volume model is more accurate and may precisely reflect the real geological situation in this region.
出处
《测井技术》
CAS
CSCD
北大核心
2013年第4期389-392,共4页
Well Logging Technology
关键词
测井解释
伽马能谱测井
地层元素
黏土
矿物含量
计算模型
log interpretation, GR spectrometry log, formation element, clay, mineral content, calculation model
