致密油烃源岩有机碳含量测井定量预测模型适用性分析——以柴达木盆地上干柴沟组下段烃源岩为例  

The applicability of well logs prediction models of organic carbon content in source rocks of the tight oil:A case of the source rocks of lower section of N_1 Formation in Qaidm Basin

作　　者：杜江民[1,2] 张小莉[1] 郑茜[1] 张子介[1] 钟高润[1] 郭岭[1] 

机构地区：[1]西北大学大陆动力学国家重点实验室/地质学系,陕西西安710069 [2]石家庄经济学院资源学院,河北石家庄050031

出　　处：《西北大学学报（自然科学版）》2016年第2期239-245,共7页Journal of Northwest University（Natural Science Edition）

基　　金：国家自然科学基金资助项目(41302076);河北省教育厅青年基金资助项目(QN2015255)

摘　　要：中国致密油勘探初期,测井资料评价烃源岩为一种可行有效的方法。利用测井曲线叠合模型(即ΔLogR技术)和多元回归方程模型两种测井定量预测模型对柴达木盆地扎哈泉凹陷上干柴沟组(N_1)下段烃源岩有机碳含量进行了预测,并通过比较预测效果来选取最佳预测模型。结果表明,本区多元回归方程模型的计算精度高于ΔLogR技术模型,原因应该在于使用ΔLogR技术模型时参考层或某些参数的选择存在问题。多元回归方程模型中,以自然伽马能谱U、声波时差以及电阻率、地层密度4个参数为自变量的模型为最佳,并得到了验证。In the early stage of tight oil exploration,well logging is considered as one effective method for evaluation of hydrocarbon source rocks.The organic carbon content of N_1 Formation in Zhahaquan Depression in Qaidam Basin was predicted using two kinds of quantitative prediction model： logging curve superposition model（ΔLogR technique） and multiple regression equation model.Then the best prediction model was selected through comparing the prediction results.The results show that the multiple regression equation model is more accurate than the ΔLogR method in the study area,which is probably attributed to the choice of the reference stratum or some parameters in ΔLogR method.In all kinds of multiple regression equation models,the one with gamma,sonic transit time,resistivity,density four parameters as independent variables is the optimalmodel and it has been verified.

关 键 词：致密油 烃源岩 有机碳含量 定量预测模型 柴达木盆地 扎哈泉凹陷 

分 类 号：P631[天文地球—地质矿产勘探]