泥岩生物气有利储层的识别及含气性评价  

Identification and Gas-Bearing Evaluation of Favorable Reservoirs for Mudstone Biogas Field

作　　者：王忠东 张笑维 王慧博 WANG Zhongdong;ZHANG Xiaowei;WANG Huibo(Liaohe Branch,China National Logging Corporation,Panjin,Liaoning 124011,China;Geological Research Institute,China National Logging Corporation,Xi’an,Shaanxi 710077,China;Well Logging Key Laboratory,China National Petroleum Corporation,Xi’an,Shaanxi 710077,China)

机构地区：[1]中国石油集团测井有限公司辽河分公司,辽宁盘锦124011 [2]中国石油集团测井有限公司地质研究院,陕西西安710077 [3]中国石油天然气集团有限公司测井重点实验室,陕西西安710077

出　　处：《测井技术》2024年第2期240-247,共8页Well Logging Technology

基　　金：中国石油天然气集团有限公司项目“海陆过渡相页岩气地震储层预测及测井评价技术研究”(2021DJ2002)。

摘　　要：随着开发的不断深入,研究区SH地区作为非主力层的第四系泥岩生物气田已经成为油田增储上产的重要勘探开发目标。这类储层由于岩性颗粒细小、泥质含量高、厚度小、成岩性差、孔隙结构复杂、非均质性强,导致储层与非储层的测井响应对比度低、有利储层识别困难。同时,高地层水矿化度及富集黄铁矿造成储层流体识别评价困难。利用自然伽马、中子等常规测井曲线,构建含砂指数F_(SD)来表征储层含砂特征,计算泥质含量,识别划分有利储层。利用三孔隙度曲线差值比值法、合成声波时差差值法以及改进的中子-声波时差交会含气指示法等多种方法综合识别储层的含气性。在试气、生产数据刻度下,利用构建的储层含气指数FGAS建立储层含气饱和度计算模型。多种方法综合应用,效果良好,为泥岩生物气的测井精细综合评价提供了技术支撑。With the continuous development of gas fields in the SH area,the Quaternary mudstone biogas,which is a non-main layer,has become an important exploration and development target for oilfields to increase reserves and production.Due to the fine lithology,high shale content,small thickness,poor diagenesis,complex pore structure,and strong heterogeneity of such reservoirs,the contrast of logging responses between reservoirs and non-reservoirs is low,and it is difficult to identify favorable reservoirs.The high salinity of formation water and the scattered high conductivity pyrite also make it difficult to identify and evaluate reservoir fluids.In this paper,by using natural gamma,neutron,and other conventional well logging curve,we build F_(SD)sand index to characterize the reservoir sand characteristics,calculate the content of mud,and identify favorable reservoir.Using three porosity curves difference ratio method,the synthetic acoustic time difference method,and the improvement of neutrons—acoustic gas instruction method and so on the many kinds of logging gas reservoir recognition technology to comprehensive analysis and identification of the laminar liquid storage,building FGAS reservoir gas indicating parameters to calculate gas saturation in the reservoirs.The practical application has achieved good effect,providing a feasible scheme for mudstone gas logging evaluation and searching for potential layers.

关 键 词：泥岩生物气 测井响应 储层识别 含砂指数 含气指示 

分 类 号：P631.84[天文地球—地质矿产勘探]