基于三种常规测井方法的有机碳含量评价

发布时间：2018-02-04 23:29

本文关键词： 页岩气储层自然伽马测井密度测井声波电阻测井有机碳含量　出处：《科学技术与工程》2017年29期 　论文类型：期刊论文

【摘要】：由于取芯数量有限,导致所获得的岩心不能反映储层内有机碳的连续变化情况,严重影响了岩心分析法评价总有机碳含量的精度。而采用测井方法评价页岩有机碳含量,可以减少因有机质分布的非均质性和岩样的代表性带来的室内岩心分析误差。为进一步优选利用测井数据评价有机碳含量分析的方法,本文在分析含有机质页岩的测井响应特征基础上,选取了四川盆地某页岩气藏区块多口井的数据,运用测井评价方法分析总有机碳含量。分别使用岩性密度测井单因素计算模型、自然伽马单因素计算模型和声波电阻率多因素计算模型的评价总有机碳含量,对比3种模型的评价结果,可以得出以下结论:(1)密度测井单因素法在页岩储层中容易受到扩径的影响;(2)自然伽马单因素计算模型由于考虑因素少导致准确度较低;(3)声波电阻率多因素法有这很大的主观性,因为人为确定页岩"基线",不便于操作。本文提供了计算和评价页岩有机碳含量方法和思路。
[Abstract]:Due to the limited number of core, the core obtained can not reflect the continuous changes of organic carbon in the reservoir. The accuracy of core analysis method for evaluating total organic carbon content is seriously affected, while the well logging method is used to evaluate shale organic carbon content. It can reduce the indoor core analysis error caused by the heterogeneity of organic matter distribution and the representativeness of rock samples. Based on the analysis of logging response characteristics of organic shale, the data of multiple wells in a shale gas reservoir block in Sichuan Basin are selected in this paper. The total organic carbon content is analyzed by logging evaluation method. The total organic carbon content is evaluated by single factor calculation model of lithology density log, natural gamma single factor calculation model and acoustic resistivity multifactor calculation model. By comparing the evaluation results of the three models, we can draw the following conclusion: 1) the single factor method of density logging is easy to be affected by the expansion in shale reservoir; 2) the accuracy of the calculation model of natural gamma single factor is low due to the lack of considering factors; 3) the acoustic resistivity multifactor method is very subjective because it is not easy to operate because of the artificial determination of shale "baseline". This paper provides methods and ideas for calculating and evaluating shale organic carbon content.
【作者单位】：中国石油大学(北京)石油工程教育部重点实验室;
【基金】：国家自然科学基金(41672132)资助
【分类号】：P618.13;P631.81
【正文快照】： 引用格式:宋磊,宁正福,丁冠阳,等.基于三种常规测井方法的有机碳含量评价[J].科学技术与工程,2017,17(29):260—265Song Lei,Ning Zhengfu,Ding Guanyang,et al.Evaluation of organiccarbon content based on three kinds of conventional logging method[J].Science Technol

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