摘要
为了做好太行东麓Z区页岩气储层测井评价工作,针对页岩主要矿物成分含量计算需求,本文在文献调研基础上,梳理了页岩主要矿物成分含量的一般计算方法,针对研究区常规测井资料实际开展了测井资料归一化工作,遵循岩心刻度测井的原则开展了岩心矿物含量测试数据与测井曲线敏感性分析,选择敏感测井曲线开展岩心主要矿物含量测井预测模型建模,进而利用所建模型在研究区开展了黏土矿物及石英含量预测.研究表明,页岩矿物含量计算一般包括"三孔隙度"测井、自然伽马能谱测井法、元素俘获能谱测井法等,其计算精度依次提高;煤田测井资料"归一化"预处理可以有效解决测井资料一致性问题;本区山西组自然电位、自然伽马、侧向电阻率对泥页岩黏土矿物含量敏感性好,声波时差、自然电位、侧向电阻率对石英含量敏感性好;基于多元回归分析建立了Z区山西组泥页岩黏土矿物及石英含量计算模型,其计算结果与X-衍射实验分数据对比表明,黏土矿物含量计算结果标准误差小于7.8%,石英含量计算结果误差小于9.6%,证明该计算方法对于研究区黏土矿物及石英含量计算效果明显.此外,研究结果表明,Z区石英含量从研究区西北部向东南部逐渐增加,黏土矿物含量从东南部向西北部增加,局部存在差异.
In order to finish the work of evaluation of shale gas reservoir in the east zone of Taihang,the paper combs the general calculation method of main mineral composition of shale content on the basis of literature research,according to the needing of main mineral content calculating.The work of Logging data normalization is finished,the sensitivity analysis is carried out between the cores mineral content and logging data following the principle of core scale logging.Then,the prediction model is established on selection of sensitive log and multiple regression analysis,the work of prediction on the clay minerals and quartz content is finished by means of the model.The study shows that the calculation of shale mineral content generally includes'three porosity'logging,natural gamma ray spectrometry logging method and element-capture spectral logging method.The calculation precision is improved in turn,the'normalization'pretreatment of the logging data of coalfield can effectively solve the problem of data consistency,the spontaneous potential and Gama ray and lateral resistivity is sensitive to the content of clay minerals in the mud shale,acoustic and the spontaneous potential and lateral resistivity is sensitive to the quartz content.Based on multiple regression analysis to establish the clay minerals and quartz calculation model of mud shale content of Z district Shan-xi formation,the calculation results with the X-ray diffraction experiment score according to the contrast,the clay mineral content calculation standard error less than 7.8%.What’s more,the calculated error of quartz content is less than 9.6%.It is proved that the method is effective for the calculation of clay mineral and quartz content in the study area.In addition,the results showed that the quartz content in Z zone increased gradually from the northwest to the southeast of the study area,and the clay mineral content increased from the southeast to the northwest,with local differences.
作者
赵军龙
张龙
李松臣
李兆惠
牛志刚
郭祥云
ZHAO Jun-long;ZHANG Long;LI Song-chen;LI Zhao-hui;NIU Zhi-gang;GUO Xiang-yun(School of Earth Sciences and Engineering,Xi’an Shiyou University,Xi’an 710065,China;Henan Province Coal Geological Survey Research Institute,Zhengzhou 450000,China)
出处
《地球物理学进展》
CSCD
北大核心
2019年第2期681-686,共6页
Progress in Geophysics
基金
西安石油大学研究生创新与实践能力培养项目(YCS18112013)
国土资源部煤炭资源勘查与综合利用重点实验室开放课题(KF2014-03)联合资助
关键词
黏土矿物
石英含量
常规测井
矿物含量预测
太行东麓Z区
Clay minerals
Quartz content
Conventional logging
Mineral content prediction
Z area in Taihang east foot
