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川东地区上二叠统龙潭组泥页岩基本特征及页岩气勘探潜力

翟常博 邓模 曹清古 肖雄 何贵松 陈斐然 邱建华 刘栩 张长江

翟常博, 邓模, 曹清古, 肖雄, 何贵松, 陈斐然, 邱建华, 刘栩, 张长江. 川东地区上二叠统龙潭组泥页岩基本特征及页岩气勘探潜力[J]. 石油实验地质, 2021, 43(6): 921-932. doi: 10.11781/sysydz202106921
引用本文: 翟常博, 邓模, 曹清古, 肖雄, 何贵松, 陈斐然, 邱建华, 刘栩, 张长江. 川东地区上二叠统龙潭组泥页岩基本特征及页岩气勘探潜力[J]. 石油实验地质, 2021, 43(6): 921-932. doi: 10.11781/sysydz202106921
ZHAI Changbo, DENG Mo, CAO Qinggu, XIAO Xiong, HE Guisong, CHEN Feiran, QIU Jianhua, LIU Xu, ZHANG Changjiang. Basic characteristics and exploration potential of shale gas in Longtan Formation of Upper Permian in eastern Sichuan Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2021, 43(6): 921-932. doi: 10.11781/sysydz202106921
Citation: ZHAI Changbo, DENG Mo, CAO Qinggu, XIAO Xiong, HE Guisong, CHEN Feiran, QIU Jianhua, LIU Xu, ZHANG Changjiang. Basic characteristics and exploration potential of shale gas in Longtan Formation of Upper Permian in eastern Sichuan Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2021, 43(6): 921-932. doi: 10.11781/sysydz202106921

川东地区上二叠统龙潭组泥页岩基本特征及页岩气勘探潜力

doi: 10.11781/sysydz202106921
基金项目: 

中国石化科技部项目 P20059-7

国家科技重大专项 2016ZX05061

中科院先导项目 XDA14010402

国家自然科学基金项目 41802163

详细信息
    作者简介:

    翟常博(1979-), 男, 博士, 高级工程师, 从事非常规油气地质评价研究工作。E-mail: zhaicb.syky@sinopec.com

    通讯作者:

    邓模(1983-), 男, 高级工程师, 从事页岩气地质评价研究工作。E-mail: dengmo.syky@sinopec.com

  • 中图分类号: TE122.1

Basic characteristics and exploration potential of shale gas in Longtan Formation of Upper Permian in eastern Sichuan Basin

  • 摘要: 四川盆地晚二叠世龙潭期沉积相类型多样,为落实不同沉积相带的页岩气勘探潜力,针对不同相带典型井开展了系统的页岩气形成条件分析,四川盆地晚二叠世龙潭期富有机质页岩主要发育在潮坪—潟湖相和陆棚相,其中潮坪—潟湖相泥页岩分布在资阳—永川—綦江一带,岩性组合复杂,泥岩、页岩、泥质碳酸盐岩不等厚互层,煤层全段均有发育,具有“高TOC、高黏土、高孔隙度、高含气量”的四高特征,有机质类型主体为Ⅲ型;浅水混积陆棚相龙潭组分布在广安—长寿—南川一带,煤层减少,灰质增加,龙潭组二段煤层基本不发育,有机质类型为Ⅱ2-Ⅱ1型,具有厚度稳定、TOC中等、脆性矿物含量高、有机孔发育的特点,气测普遍活跃;深水陆棚相上二叠统吴家坪组分布在石柱—万县以及广元—梁平一带,煤层仅在吴家坪组底部发育,吴家坪组二段以硅质页岩、泥岩为主,具有“高TOC、高脆性矿物含量、高孔隙度、高含气量、高含气饱和度”等五高特征,有机质类型为Ⅱ1型,有机质孔普见,是目前二叠系页岩气勘探开发的主力层系。

     

  • 图  1  四川盆地构造单元及研究区位置

    Figure  1.  Structural units and location of study area, Sichuan Basin

    图  2  四川盆地及周缘上二叠统龙潭组/吴家坪组沉积相

    Figure  2.  Sedimentary facies of Upper Permian Longtan/Wujiaping formations in Sichuan Basin and its periphery

    图  3  川东地区SY1井上二叠统龙潭组页岩特征综合柱状图

    据文献[10],有修改。

    Figure  3.  Comprehensive stratigraphic histogram of shale, Upper Permian Longtan Formation, well SY1, eastern Sichuan Basin

    图  4  四川盆地南部上二叠统龙潭组过渡相干酪根碳同位素分布

    Figure  4.  Distribution of kerogen carbon isotopes in transitional facies, Upper Permian Longtan Formation, southern Sichuan Basin

    图  5  川东地区DYS1井上二叠统龙潭组泥页岩有机质孔发育特征

    Figure  5.  Development characteristics of organic matter pores in shale, Upper Permian Longtan Formation, well DYS1, eastern Sichuan Basin

    图  6  川东地区DYS1井上二叠统龙潭组泥页岩无机矿物孔发育特征

    Figure  6.  Development characteristics of inorganic mineral pores in shale, Upper Permian Longtan Formation, well DYS1, eastern Sichuan Basin

    图  7  川东地区SYx井上二叠统龙潭组页岩特征综合柱状图

    Figure  7.  Comprehensive stratigraphic histogram of shale, Upper Permian Longtan Formation, well SYx, eastern Sichuan Basin

    图  8  川东地区HYx井上二叠统吴家坪组页岩特征综合柱状图

    据文献[10],有修改。

    Figure  8.  Comprehensive stratigraphic histogram of shale, Upper Permian Wujiaping Formation, well HYx, eastern Sichuan Basin

    图  9  川东地区陆棚相上二叠统吴家坪组二段干酪根碳同位素分布

    Figure  9.  Carbon isotope distribution of kerogen, second member of Upper Permian Wujiaping Formation, eastern Sichuan Basin

    图  10  浅水混积陆棚亚相(a,b,c)和深水陆棚亚相(d,e,f)有机孔发育程度对比

    Figure  10.  Comparison of organic pore development between shallow-water mixed shelf subfacies (a, b, c) and deep-water shelf subfacies (d, e, f)

    表  1  川东地区不同类型龙潭组/吴家坪组页岩基本特征对比

    Table  1.   Basic characteristics of different types of shale in Longtan/Wujiaping formations, eastern Sichuan Basin

    参数类型 潮坪—潟湖亚相(SY1井) 浅水混积陆棚亚相(SYx井) 深水陆棚亚相(HYx井)
    潭二段/吴二段厚度/m 39 30 20
    生烃条件 有机质类型 Ⅲ型为主 2 1
    有机质丰度/% 4.3 2.2 8.3
    热演化程度(Ro)/% 2.3 1.9 1.9
    储集条件 有机质内孔 不发育 较发育 发育
    孔隙度/% 2.67~9.74 3.03~9.88
    可压性 黏土矿物含量/% 55 34 17
    动态杨氏模量/GPa 22.5 40 42
    总含气量/(m3·t-1) 1.22 3.81
    气测曲线形态 尖峰状 箱状 箱状
    下载: 导出CSV
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    [26] 梁西文, 李乐. 鄂西渝东区上二叠统吴家坪组页岩气地质条件及勘探潜力[J]. 石油实验地质, 2021, 43(3): 386-394. doi: 10.11781/sysydz202103386

    LIANG Xiwen, LI Le. Geological conditions and exploration potential for shale gas in Upper Permian Wujiaping Formation in the region of western Hubei-eastern Chongqing[J]. Petroleum Geology & Experiment, 2021, 43(3): 386-394. doi: 10.11781/sysydz202103386
    [27] 郭少斌, 王子龙, 马啸. 中国重点地区二叠系海陆过渡相页岩气勘探前景[J]. 石油实验地质, 2021, 43(3): 377-385. doi: 10.11781/sysydz202103377

    GUO Shaobin, WANG Zilong, MA Xiao. Exploration prospect of shale gas with Permian transitional facies of some key areas in China[J]. Petroleum Geology & Experiment, 2021, 43(3): 377-385. doi: 10.11781/sysydz202103377
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出版历程
  • 收稿日期:  2021-08-06
  • 修回日期:  2021-10-12
  • 刊出日期:  2021-11-28

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