基于全油气系统理论的油气资源评价方法——以冀中坳陷武清凹陷沙河街组三段为例  

Oil and gas resource assessment method based on whole oil-gas system theory:taking the 3rd Member of Shahejie Formation in Wuqing Sag of Jizhong Depression as an example

作　　者：李小冬 郑伟[2,3] 史原鹏 马学峰 王元杰 田建章 李奔 罗金洋 姜福杰 LI Xiaodong;ZHENG Wei;SHI Yuanpeng;MA Xuefeng;WANG Yuanjie;TIAN Jianzhang;LI Ben;LUO Jinyang;JIANG Fujie(Research Institute of Exploration and Development,Huabei Oil Field Company,PetroChina,Renqiu 062552,China;State Key Laboratory of Petroleum Resources and Engineering,China University of Petroleum(Beijing),Beijing 102249,China;College of Geosciences,China University of Petroleum(Beijing),Beijing 102249,China)

机构地区：[1]中国石油华北油田分公司勘探开发研究院,河北任丘062552 [2]中国石油大学(北京)油气资源与工程国家重点实验室,北京102249 [3]中国石油大学(北京)地球科学学院,北京102249

出　　处：《断块油气田》2024年第5期778-785,共8页Fault-Block Oil & Gas Field

基　　金：中国石油天然气股份有限公司科学研究与技术开发项目“华北油田‘十三五’油气资源及经济、环境评价”(2023YQX20106)。

摘　　要：针对武清凹陷沙河街组三段烃源岩分布特征、生排烃潜力认识不清等问题,以全油气系统理论为指导,基于研究区岩心、测井、实测地化等资料,建立了武清凹陷沙三段烃源岩的生排烃模式,明确了研究区的烃源岩分布和地球化学特征,以及源内生、排、残留烃量特征。结果表明:1)武清凹陷沙三段烃源岩厚度大,有机质丰度高,母质类型较好,处于低熟—成熟阶段,且与多个构造带有良好的油源匹配关系;2)武清凹陷沙三段烃源岩总生烃量为4950×10^(8)t,总排烃量为3170×10^(8)t,残留烃量为1780×10^(8)t,生烃潜力较大;3)基于全油气系统理论计算的结果不仅包含生烃量,还包含排烃量(常规+致密烃量)及残留烃量(页岩烃量)。该研究对于沙三段深层油气勘探具有指导意义。In view of the unclear understanding of the distribution characteristics and hydrocarbon generation and expulsion potential of the 3rd Member source rocks of Wuqing Sag in Shahejie Formation,the hydrocarbon generation and expulsion model for the 3rd Member source rocks of Wuqing Sag in Shahejie Formation is established based on the theory of whole oil-gas system and the data of core,well logging and geogeochemical measurements in the study area.The source rock distribution,geochemical characteristics and in-source generation,expulsion and residual of hydrocarbon characteristics in the study area are clarified.The results show that:(1)The source rocks of the 3rd Member of Wuqing Sag in Shahejie Formation have the characteristics of large thickness,high organic matter abundance and favorable parent material type,which are in the stage of low-maturity to maturity.The 3rd Member source rocks have good oil-source matching relationship with several tectonic zones.(2)The total hydrocarbon generation is 4.95×10^(11)m^(3),the total hydrocarbons expulsion is 3.17×10^(11)m^(3)and the residual hydrocarbons is 1.78×10^(11)m^(3)in the 3rd Member source rocks of Wuqing Sag in Shahejie Formation,indicating significant hydrocarbon generation potential.(3)The calculation results based on whole oil-gas system theory include not only hydrocarbon generation,but also hydrocarbon expulsion(conventional+tight hydrocarbon)and residual hydrocarbon(shale hydrocarbon).The study provides guidance for deep oil-gas reservoir exploration of the 3rd Member in Sha hejie Formation.

关 键 词：全油气系统 油气资源评价 生烃潜力 沙河街组 武清凹陷 冀中坳陷 

分 类 号：P618.13[天文地球—矿床学]