巴布亚盆地中上侏罗统烃源岩油气地球化学特征研究

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英文篇名：Geochemical Characteristics and Evaluation of Middle-upper Jurassic Hydrocarbon Source Rock in Papuan Basin 作者：黎彩凤 ; 旷理雄 ; 郭建华 ; 蔡文杰 英文作者：Li Caifeng;Kuang Lixiong;Guo Jianhua;Cai Wenjie;Central South University;General Research Institute,CNOOC; 关键词：巴布亚盆地 ; 中上侏罗统 ; 有机质丰度 ; 有机质类型 ; 成熟度 ; 生烃潜力 英文关键词：Papuan Basin;;middle-upper Jurassic;;the abundance of organic matter;;the type of organic matter;;maturity;;hydrocarbon generation potential 中文刊名：CJDL 英文刊名：Journal of Yangtze University(Natural Science Edition) 机构：中南大学地球科学与信息物理学院;中海油研究总院; 出版日期：2016-03-05 出版单位：长江大学学报(自科版) 年：2016 期：v.13 基金：国家科技重大专项(2011ZX05030-002-005) 语种：中文; 页：CJDL201607004 页数：5 CN：07 ISSN：42-1741/N 分类号：3+18-21

摘要

以现代石油地质理论为指导,利用研究区岩心资料和钻井油气地球化学资料,系统研究了巴布亚盆地中上侏罗统烃源岩特征。研究表明,盆地中上侏罗统烃源岩主要发育在Imburu组、Koi-Iange组、Barikewa组和Magobu组,沉积厚度较大,平均厚度368m,岩性主要为海相、海陆过渡相页岩和泥岩。研究区烃源岩有机质丰度整体中等,局部较高,全区有机碳含量范围为0.40%~2.25%,平均有机碳含量1.57%;有机质类型以Ⅲ型为主,Ⅱ2型次之,有机质热演化普遍达到成熟阶段,局部为高成熟-过成熟(Ro为0.5%~1.3%,局部高达2.1%),具有较好的生烃潜力,表明该区具有良好的油气勘探前景。
        Guided by the modern petroleum geology theory,the characteristics of middle-upper Jurassic hydrocarbon source rocks and their hydrocarbon-generated potential are systemically analyzed by using the core data and the oil-gas geochemical data in the study area.The study shows that the middle-upper Jurassic hydrocarbon source rocks are mainly developed in Imburu Formation,Koi-Iange Formation,Barikewa Formation and Magobu Formation in this basin,where the sediment thickness is bigger with average thickness of 368 m,the lithology includes marine or marine-continental transitional facies shale and mudstone.The source rock in this area is characterized by high abundance of organic matter(TOC content generally ranges from 0.40%to 2.25%,it is 1.57% on average),kerogen is type-Ⅲ,followed by type-Ⅱ2and the thermal evolution is generally at maturity stage,locally it is at high maturity stage and over-maturity stage(Ro ranges from 0.5%to 1.3%,locally it even reaches at 2.1%),it has good hydrocarbon potential,it shows that it has a good prospect for oil and gas exploration in the future.

引文

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