岩性油气藏 ›› 2023, Vol. 35 ›› Issue (3): 126–137.doi: 10.12108/yxyqc.20230311

• 地质勘探 • 上一篇    下一篇

准噶尔盆地阜康断裂带二叠系芦草沟组页岩油成藏条件

柳忠泉1, 赵乐强1, 曾治平1, 田继军2, 李正强2, 罗锦昌2, 胡美玲3   

  1. 1. 中国石化胜利油田分公司 勘探开发研究院, 山东 东营 257015;
    2. 新疆大学 地质与矿业工程学院, 乌鲁木齐 830046;
    3. 中国石油华北油田公司 勘探开发研究院, 河北 任丘 062552
  • 收稿日期:2022-06-26 修回日期:2022-08-11 出版日期:2023-05-01 发布日期:2023-04-25
  • 作者简介:柳忠泉(1966—),男,博士,高级工程师,主要从事油气勘探综合地质研究工作。地址:(257015)山东省东营市东营区聊城路2号。Email:slliuzq@163.com。
  • 基金资助:
    中国石油化工股份有限公司重大科技资助项目 “准噶尔盆地及周缘矿权战略选区及评价研究”(编号: P21086-4) 和国家重大专项 “准噶尔盆地碎屑岩层系油气富集规律与勘探评价”(编号: 2016ZX05002002) 联合资助。

Shale oil accumulation conditions of Permian Lucaogou Formation in Fukang fault zone,Junggar Basin

LIU Zhongquan1, ZHAO Leqiang1, ZENG Zhiping1, TIAN Jijun2, LI Zhengqiang2, LUO Jinchang2, HU Meiling3   

  1. 1. Research Institute of Exploration and Development, Shengli Oilfield Company, Sinopec, Dongying 257015, Shandong, China;
    2. College of Geology and Mining Engineering, Xinjiang University, Urumqi 830046, China;
    3. Research Institute of Exploration and Development, PetroChina Huabei Oilfield Company, Renqiu 062552, Hebei, China
  • Received:2022-06-26 Revised:2022-08-11 Online:2023-05-01 Published:2023-04-25

摘要: 准噶尔盆地阜康断裂带地处盆地前陆冲断带,构造复杂,勘探开发潜力大。通过烃源岩有机地球化学测试、铸体薄片鉴定、扫描电镜分析等对准噶尔盆地阜康断裂带二叠系芦草沟组页岩油成藏条件进行了分析。研究结果表明:①阜康断裂带二叠系芦草沟组烃源岩有机质丰度高,TOC质量分数平均为3.65%,有机质类型主要为Ⅱ1型,Ro值为0.76%~1.41%,多处于成熟-高成熟阶段,为一套好-优质烃源岩。②研究区芦草沟组储层孔隙度平均值为5.12%,渗透率为0.02~2.69 mD,为一套低孔-特低孔、特低渗储层;储层岩石类型复杂,是以泥页岩、粉砂岩、碳酸盐岩为主的一套混积岩,脆性矿物质量分数平均为82.96%;储集空间类型包括粒间孔、晶间孔、溶蚀孔、有机质孔和微裂缝。③广覆式烃源岩、大面积连续分布的优势岩相以及有利的源储组合控制了研究区芦草沟组页岩油的富集成藏,形成了"源储紧邻的夹层型"与"源储一体的基质型"共存的页岩油富集模式,大龙口地区、小龙口-奇1井地区可作为下一步勘探开发的重点区域。

关键词: 成藏条件, 混积岩, 源储一体, 成藏模式, 页岩油, 芦草沟组, 二叠系, 阜康断裂带, 准噶尔盆地

Abstract: Fukang fault zone is located in the foreland thrust belt of Junggar Basin,with complex structure and great exploration and development potential. The shale oil accumulation conditions of Permian Lucaogou Formation in Fukang fault zone were analyzed through organic geochemical testing of source rocks, cast thin section identification and scanning electron microscope analysis. The results show that: (1)The source rocks of Permian Lucaogou Formation in Fukang fault zone have high organic matter abundance,with an average TOC mass fraction of 3.65%, and the organic matters are mainly type Ⅱ1 with Ro values of 0.76-1.41,mostly in the mature to high mature stage,which is a set of good to high-quality hydrocarbon source rocks.(2)The average porosity of the reservoirs of Lucaogou Formation in the study area is 5.12%, and the permeability ranges from 0.02 mD to 2.69 mD,which is a set of reservoirs with low to extra-low porosity and extra-low permeability. The reservoir rock type is complex,and it is a set of hybrid sedimentary rocks dominated by mud shale, siltstone and carbonate rocks, with an average brittle mineral mass fraction of 82.96%. The reservoir space includes intergranular pores, intercrystalline pores,dissolved pores,organic matter pores and microfractures.(3)The widely overlying hydrocarbon source rocks,the dominant lithofacies distributed continuously in a large area and the favorable sourcereservoir configuration control the shale oil enrichment and accumulation of Lucaogou Formation in the study area, forming a shale oil accumulation model of “source-reservoir adjacent interval type” and “source-reservoir integrated matrix type” coexistence. Dalongkou area and Xiaolongkou to Qi 1 well area are the key areas for the next exploration and development.

Key words: accumulation conditions, hybrid sedimentary rocks, source-reservoir integration, accumulation model, shale oil, Lucaogou Formation, Permian, Fukang fault zone, Junggar Basin

中图分类号: 

  • TE122.1
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