辽河西部凹陷古近系页岩类型及测井识别  

Types and Logging Identification of Paleogene Shale in Western Liaohe Depression

作　　者：徐玳笠 许露露 龚志愚 陈康 周向辉 杨洁 文剑航 任志军 Xu Daili;Xu Lulu;Gong Zhiyu;Chen Kang;Zhou Xianghui;Yang Jie;Wen Jianhang;Ren Zhijun(Hubei Geological Survey,Wuhan,Hubei 430034;Hubei Research Center of Geological Exploration and Engineering Technology,Wuhan,Hubei 430034;China (Wuhan) Intellectual Property Protection Center,Wuhan,Hubei 430015)

机构地区：[1]湖北省地质调查院,湖北武汉430034 [2]湖北省地质勘查工程技术研究中心,湖北武汉430034 [3]中国(武汉)知识产权保护中心,湖北武汉430015

出　　处：《资源环境与工程》2022年第1期17-22,共6页Resources Environment & Engineering

基　　金：国家自然科学基金项目——辽河坳陷页岩油和页岩气聚集条件与富集机理(41272167)。

摘　　要：辽河西部古近系广泛发育泥页岩层,是页岩油气勘探的热点层系。利用测井技术识别该地区页岩并区分页岩类型,有助于提高页岩油气勘探开发效率。本次研究利用辽河西部凹陷常规老井的钻测录井资料,对该地区页岩的岩性特征及测井特征进行分析。研究表明,研究区古近系沙河街组页岩类型主要有油页岩、暗色泥岩、砂质泥岩以及钙质和白云质泥岩。泥页岩主要发育在沙河街组三段、水体稳定的深湖相区,矿物组分以黏土矿物为主。星形图测井相统计认为泥岩可表征为CAL>10 in且1Ω·m<Rt<12Ω·m;泥质白云岩可表征为50Ω·m<Rt<300Ω·m且60μs/ft<AC<90μs/ft;油页岩可表征为50Ω·m<Rt<100Ω·m;白云质泥岩可表征为10Ω·m<Rt<50Ω·m。曙古165井沙三段暗色泥岩的测井响应特征证明了星形图测井相的可靠性,表明该页岩类型测井识别方法快捷有效且具有应用推广价值。Mud shale strata are widely developed in the Paleogene in the western Liaohe Basin,which is a focused strata for shale oil and gas exploration.Well logging technology is an effective identification method to identify and distinguish the type of shale,which can improve the efficiency of shale oil and gas exploration and development.In this study,the lithology and logging characteristics of shale in the western sag of Liaohe Basin are analyzed by using the drilling and logging data of conventional old wells.Studies have shown that the shale types of Paleogene Shahejie Formation in the study area are mainly oil shale,dark mudstone,sandy mudstone,calcareous and dolomitic mudstone.The shale is mainly developed in the third member of Shahejie Formation,and the water body is stable in the deep lake area.The mineral components are mainly clay minerals.According to the statistics of the star graph of well logging facies of shale types,CAL>10 in and 1Ω·m<Rt<12Ω·m can be interpreted as mudstone;60μs/ft<AC<90μs/ft and 50Ω·m<Rt<300Ω·m can be interpreted as argillaceous dolomite;50Ω·m<Rt<100Ω·m can be interpreted as oil shale;10Ω·m<Rt<50Ω·m can be interpreted as dolomite shale.The logging response characteristics of dark mudstone in the third member of Shahejie Formation in Shugu 165 well prove the reliability of star chart logging facies,which proves that the logging identification method of shale type is fast and effective and has application and promotion value.

关 键 词：页岩类型 测井识别 西部凹陷 古近系 

分 类 号：P618.13[天文地球—矿床学] P631.81[天文地球—地质学]