致密油烃源岩有机碳含量测井评价方法优选及应用——以鄂尔多斯盆地延长组长7段烃源岩为例  

Analysis on the optimization and application of well logs indentification methods for organic carbon content in source rocks of the tight oil——illustrated by the example of the source rocks of Chang 7 member of Yanchang Formation in Ordos Basin

作　　者：杜江民[1,2] 张小莉[2] 钟高润[2] 封从军[2] 郭岭[2] 张晓龙[2] 罗文行[3] 

机构地区：[1]河北地质大学资源学院,石家庄050031 [2]西北大学大陆动力学国家重点实验室/地质学系,西安710069 [3]长江三峡勘测研究院有限公司(武汉),武汉430074

出　　处：《地球物理学进展》2016年第6期2526-2533,共8页Progress in Geophysics

基　　金：国家自然科学基金(41502127;41302076);河北省教育厅科研项目(QN2015255)联合资助

摘　　要：致密油勘探初期存在烃源岩取心少、实测样品分布不连续等问题;利用测井资料可定量评价烃源岩.烃源岩富含有机质,在测井曲线上常以高伽马、低密度、高声波时差、高电阻率、高中子孔隙度等特征呈现.论文系统介绍了ΔLogR法和多元回归法两种基于测井资料的烃源岩定量评价方法,并建立了相应的预测模型.通过建立的模型对鄂尔多斯盆地姬塬地区延长组长7段烃源岩有机碳含量进行预测,并对计算出的TOC数据(TOC_(计算))与实测TOC数据(TOC_(实测))进行了对比和分析.研究结果表明,研究区ΔLogR法与多元回归法中的双参数模型为较好的预测方法,且ΔLogR法预测结果明显优于多元回归法,优选ΔLogR法为最佳评价方法;并对出现这种情况的原因进行了分析.Tight oil exploration in early stage has characteristics of few source rock cores and measured samples ＇ distribution not continuous. we can evaluate source rocks using logging data. Source rocks are rich in organic matter and have characteristics of high gamma,low density,high acousti travel ctime,high resistivity,high neutron porosity. System introduced ΔLogR and multiple regression source rocks quantitative evaluation method based on logging data and established the corresponding prediction models.We calculated source rock organic carbon content in Chang 7 Member of Yanchang Formation in Jiyuan area, compared and analyzed calculated TOC and measured TOC data. The results show that ΔLogR and two-parameter model of multiple regression method are better prediction methods,but ΔLogR method was superior to multiple regression method in prediction results,so ΔLogR method is the best evaluation method. The reason for this situation has been analyzed.

关 键 词：致密油 烃源岩 有机碳含量 测井评价方法 鄂尔多斯盆地 姬塬地区 延长组 

分 类 号：P631[天文地球—地质矿产勘探]