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正安地区五峰组-龙马溪组页岩储层特征及控制因素

张福 黄艺 蓝宝锋 李龙 刘婷 刘睿 江定川

张福, 黄艺, 蓝宝锋, 李龙, 刘婷, 刘睿, 江定川. 正安地区五峰组-龙马溪组页岩储层特征及控制因素[J]. 地质科技通报, 2021, 40(1): 49-56. doi: 10.19509/j.cnki.dzkq.2021.0016
引用本文: 张福, 黄艺, 蓝宝锋, 李龙, 刘婷, 刘睿, 江定川. 正安地区五峰组-龙马溪组页岩储层特征及控制因素[J]. 地质科技通报, 2021, 40(1): 49-56. doi: 10.19509/j.cnki.dzkq.2021.0016
Zhang Fu, Huang Yi, Lan Baofeng, Li Long, Liu Ting, Liu Rui, Jiang Dingchuan. Characteristics and controlling factors of shale reservoir in Wufeng Formation-Longmaxi Formation of the Zheng'an area[J]. Bulletin of Geological Science and Technology, 2021, 40(1): 49-56. doi: 10.19509/j.cnki.dzkq.2021.0016
Citation: Zhang Fu, Huang Yi, Lan Baofeng, Li Long, Liu Ting, Liu Rui, Jiang Dingchuan. Characteristics and controlling factors of shale reservoir in Wufeng Formation-Longmaxi Formation of the Zheng'an area[J]. Bulletin of Geological Science and Technology, 2021, 40(1): 49-56. doi: 10.19509/j.cnki.dzkq.2021.0016

正安地区五峰组-龙马溪组页岩储层特征及控制因素

doi: 10.19509/j.cnki.dzkq.2021.0016
基金项目: 

国家自然科学基金项目 41702157

贵州省地勘基金项目 GZMC-ZG20192014-4

详细信息
    作者简介:

    张福(1961-), 男, 高级工程师, 主要从事页岩气地质评价和勘探开发管理工作。E-mail:hdzf1212@163.com

    通讯作者:

    刘睿(1988-), 男, 副研究员, 主要从事油气成藏动力学及非常规油气地质研究工作。E-mail:liurui@outlook.com

  • 中图分类号: P618.13

Characteristics and controlling factors of shale reservoir in Wufeng Formation-Longmaxi Formation of the Zheng'an area

  • 摘要: 四川盆地以东的复杂构造变形带拥有巨大的页岩气资源潜力,但目前勘探开发不足。为了支撑复杂构造变形带的页岩气勘探开发,针对复杂构造变形带内正安地区五峰组-龙马溪组页岩钻井岩心,开展了矿物学、有机地球化学、岩石学分析测试,探讨了页岩储层特征及主控因素。正安地区五峰组-龙马溪组页岩储层石英质量分数高达60%~80%,以硅质页岩为主,脆性程度高。石英主要是无机成因,包括原生碎屑石英沉积和黏土矿物转化而成的次生石英。原生碎屑石英、层状黏土颗粒的压实脆裂增大了孔隙空间,但次生石英的沉淀、充填减小了矿物颗粒间的骨架孔隙。正安地区五峰组-龙马溪组页岩储层总w(TOC)高达5.8%,有机质中无定形腐泥组大于80%,沥青反射率介于2.6%~3.1%,有机质热解而成的有机孔显著增大了孔隙度,但有机孔隙后期遭受构造挤压变形,多坍塌成狭长的多边形。

     

  • 图 1  四川盆地(a)和正安地区(b)五峰组-龙马溪组沉积相图

    Figure 1.  Sedimentary facies of the Wufeng Formation-Longmaxi Formation shale in Sichuan Basin (a) and Zheng′an area (b)

    图 2  正安地区五峰组-龙马溪组页岩石英、碳酸盐矿物、黏土矿物、总w(TOC)以及氦气孔隙度

    Figure 2.  Proportions of quartz, carbonates, clays, total organic carbon(TOC) content, and porosity of the Wufeng Formation-Longmaxi Formation shale in Zheng′an area

    图 3  正安地区及邻近地区五峰组-龙马溪组页岩X射线衍射矿物组分三角图(XY1、TY1井数据来源于文献[19, 20])

    Figure 3.  Ternary plot of X-ray diffraction mineral composition in the Wufeng Formation-Longmaxi Formation shale of the Zheng′an area and its periphery area

    图 4  正安地区五峰组-龙马溪组页岩孔隙度与总w(TOC)(a)、石英组分(b)、黏土矿物组分(c)交会图

    Figure 4.  Cross plots of porosity and total organic carbon(TOC) content (a), quartz proportion (b), and clay minerals proportion (c) in Wufeng Formation-Longmaxi Formation shale in Zheng′an area

    图 5  正安地区五峰组-龙马溪组页岩扫描电镜照片

    a.狭长的多边形有机孔;b.白云石溶蚀孔;c.次生石英颗粒; d.碎屑石英压裂隙;e.层状黏土压实破裂裂纹(缝);f.层状黏土压实弯曲层间开裂纹(缝)

    Figure 5.  Scanning electron microscope(SEM) of the Wufeng Fomration-Longmaxi Formation shale in Zheng′an area

    图 6  正安地区与XY1、XY1井五峰组-龙马溪组页岩石英与黏土矿物组分交会图(a)、石英组分与总w(TOC)交会图(b)(XY1、XY 1井数据来源于文献[19-20];AY1井数据来源于文献[27])

    Figure 6.  Cross plots of quartz and clay minerals proportions (a), and quartz proportion and total organic carbon(TOC) content (b) in Wufeng Formation-Longmaxi Formation shale of the Well XY1 and Well TY1 in Zheng′an area

    表  1  正安地区五峰组-龙马溪组页岩有机质显微组分特征

    Table  1.   Macerals of organic matter in the Wufeng Formation-Longmaxi Formation shale of the Zheng′an area

    钻井 深度/m 层位 腐泥组φB/% 壳质组φB/% 镜质组φB/% 惰质组φB/% 类型
    浮游藻类体 腐泥组无定形体 角质体 木栓质体 树脂体 孢粉体 腐殖无定形体 菌孢体 底栖藻无定形体 富氢镜质体 正常镜质体 丝质体 类型指数 类型
    AY2 1957 龙马溪组 / 88 / / / / / / 10 / 2 / 92
    1959 / 86 / / / / / / 12 / 2 / 91
    1963 / 88 / / / / / / 11 / 1 / 93
    1969 / 83 / / / / / / 13 / 4 / 87
    1972 五峰组 / 90 / / / / / / 8 / 2 / 93
    1975 / 88 / / / / / / 9 / 3 / 90
    AY3 2471 龙马溪组 / 90 / / / / / / 8 / 2 / 93
    2474 / 90 / / / / / / 8 / 2 / 93
    2477 / 90 / / / / / / 7 / 3 / 91
    2480 / 89 / / / / / / 9 / 2 / 92
    2482 / 86 / / / / / / 10 / 4 / 88
    2485 / 88 / / / / / / 8 / 4 / 89
    2488 五峰组 / 89 / / / / / / 9 / 2 / 92
    2492 / 88 / / / / / / 9 / 3 / 90
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