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四川盆地天宫堂地区下志留统龙马溪组天然裂缝特征及形成期次

李林豪 范存辉 赵圣贤 刘绍军 徐飞 聂珊 余亚伟

李林豪, 范存辉, 赵圣贤, 刘绍军, 徐飞, 聂珊, 余亚伟. 四川盆地天宫堂地区下志留统龙马溪组天然裂缝特征及形成期次[J]. 石油实验地质, 2024, 46(3): 472-482. doi: 10.11781/sysydz202403472
引用本文: 李林豪, 范存辉, 赵圣贤, 刘绍军, 徐飞, 聂珊, 余亚伟. 四川盆地天宫堂地区下志留统龙马溪组天然裂缝特征及形成期次[J]. 石油实验地质, 2024, 46(3): 472-482. doi: 10.11781/sysydz202403472
LI Linhao, FAN Cunhui, ZHAO Shengxian, LIU Shaojun, XU Fei, NIE Shan, YU Yawei. Characteristics and formation stages of natural fractures in Lower Silurian Longmaxi Formation in Tiangongtang area of Sichuan Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2024, 46(3): 472-482. doi: 10.11781/sysydz202403472
Citation: LI Linhao, FAN Cunhui, ZHAO Shengxian, LIU Shaojun, XU Fei, NIE Shan, YU Yawei. Characteristics and formation stages of natural fractures in Lower Silurian Longmaxi Formation in Tiangongtang area of Sichuan Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2024, 46(3): 472-482. doi: 10.11781/sysydz202403472

四川盆地天宫堂地区下志留统龙马溪组天然裂缝特征及形成期次

doi: 10.11781/sysydz202403472
基金项目: 

油气藏地质及开发工程全国重点实验室开放基金“差异构造—热演化过程及对页岩气富集保存的影响机理” PLN2023-31

中国石油重大工程技术现场试验项目“深层页岩气地质综合评价技术现场试验” 2019F-31-01

详细信息
    作者简介:

    李林豪(1999—),男,硕士生,从事构造地质研究。E-mail: lilinhao0818@163.com

    通讯作者:

    范存辉(1980—),男,博士,副教授,从事非常规油气储层表征与预测、构造解析、裂缝评价等研究。E-mail: fanchswpi@163.com

  • 中图分类号: TE122.2

Characteristics and formation stages of natural fractures in Lower Silurian Longmaxi Formation in Tiangongtang area of Sichuan Basin

  • 摘要: 四川盆地西南缘下志留统龙马溪组页岩气储量巨大,裂缝发育特征与形成期次对页岩气富集及产能具有重要影响。以天宫堂地区龙马溪组为研究对象,采用岩心分析、FMI成像测井、岩石声发射实验、裂缝充填物碳氧同位素测试、包裹体均一温度测试和埋藏—热演化史分析等分析技术和综合地质方法,研究页岩中天然裂缝的发育特征和形成时期。结果显示,研究区龙马溪组天然裂缝以构造成因的直立缝与低角度缝共同发育为特征,岩心裂缝具有发育程度高、延伸短、充填程度高等特征。成像测井裂缝倾角比对、岩心裂缝交切关系、裂缝充填物流体包裹体测试及岩石声发射实验等结果表明,天宫堂地区龙马溪组裂缝形成与3期构造运动有关。结合埋藏—热演化史分析可证实:第一期为NW向、NNE向平面剪切缝和NEE向剖面剪切缝,形成于燕山中期—晚期(130~62 Ma),构造应力方位为近SN向(345°±5°),包裹体均一温度为185~206 ℃;第二期为NE向、NWW向平面剪切缝和NNW向剖面剪切缝,形成于燕山晚期—喜马拉雅中期(62~34 Ma),构造应力方位为EW向(80°±5°),包裹体均一温度为165~184 ℃;第三期为近SN向、NEE向平面剪切缝和NE向剖面剪切缝,形成于喜马拉雅中期—现今(34 Ma至今), 构造应力方位为近NW向(315°±5°),包裹体均一温度为125~162 ℃。结合地质力学背景,建立了天宫堂地区龙马溪组3期构造裂缝演化模式。

     

  • 图  1  川西南天宫堂地区构造样式(a)、过典型井剖面(b)及典型井下志留统龙马溪组柱状图(c)

    Figure  1.  Tectonic style of Tiangongtang area, southwestern Sichuan Basin (a), cross-section of typical well (b), and columnar map of typical well of Lower Silurian Longmaxi Formation (c)

    图  2  川西南天宫堂地区下志留统龙马溪组构造裂缝

    a.Y208井,3 830.61~3 831.05 m,高角度剪切缝,方解石、石膏混合充填;b.Y207井,3 072.8 m,高角度剪切缝,方解石半充填;c.Y208井,3 830.1~3 830.3 m,高角度剪切缝,方解石全充填;d.Y203井,3 786.00~3 786.44 m,张性缝,方解石半充填;e.Y202井,3 501.99~3 502.20 m,异常高压缝,方解石、沥青混合充填;f.Y207井,3 031.43~3 031.70 m,页理缝;g.Y205井,3 433.89~3 433.98 m,页理缝;h.Y207井,3 069.09 m,构造缝;i.Y207井,3 049.62 m,构造缝。

    Figure  2.  Structural fractures of Lower Silurian Longmaxi Formation in Tiangongtang area, southwestern Sichuan Basin

    图  3  川西南天宫堂地区裂缝FMI成像测井显示及走向玫瑰花图

    Figure  3.  Fracture FMI imaging logging display and strike rosette diagram in Tiangongtang area, southwestern Sichuan Basin

    图  4  川西南天宫堂地区下志留统龙马溪组岩心、薄片裂缝交切关系

    Figure  4.  Core and thin section fracture intersection relationship of Lower Silurian Longmaxi Formation in Tiangongtang area, southwestern Sichuan Basin

    图  5  川西南天宫堂地区下志留统龙马溪组页岩天然裂缝发育参数统计

    Figure  5.  Statistics of natural fracture development parameters for Lower Silurian Longmaxi Formation shale in Tiangongtang area, southwestern Sichuan Basin

    图  6  川西南天宫堂地区典型井裂缝纵向变化特征

    Figure  6.  Longitudinal variation characteristics of typical well fractures in Tiangongtang area, southwestern Sichuan Basin

    图  7  川西南天宫堂地区下志留统龙马溪组裂缝充填物包裹体均一温度

    Figure  7.  Homogenization temperature distribution of fractures filling inclusions of Lower Silurian Longmaxi Formation in Tiangongtang area, southwestern Sichuan Basin

    图  8  川西南天宫堂地区下志留统龙马溪组岩石声发射实验曲线

    Figure  8.  Experimental curves of rock acoustic emission of Lower Silurian Longmaxi Formation in Tiangongtang area, southwestern Sichuan Basin

    图  9  川西南天宫堂地区裂缝充填物碳氧同位素交会分析

    Figure  9.  Cross plot analysis of carbon and oxygen isotope of fracture filling in Tiangongtang area, southwestern Sichuan Basin

    图  10  川西南天宫堂地区Y203井下志留统龙马溪组埋藏史

    Figure  10.  Burial history of Lower Silurian Longmaxi Formation in well Y203, Tiangongtang area, southwestern Sichuan Basin

    图  11  川西南天宫堂地区下志留统龙马溪组构造裂缝演化模式

    Figure  11.  Evolution model of structural fractures of Lower Silurian Longmaxi Formation in Tiangongtang area, southwestern Sichuan Basin

    表  1  川西南天宫堂地区下志留统龙马溪组裂缝充填物包裹体样品测温数据

    Table  1.   Temperature measurement data of inclusions of fracture filling materials of Lower Silurian Longmaxi Formation in Tiangongtang area, southwestern Sichuan Basin

    井号 井深/m 宿主矿物 类型 均一温度/℃
    Y202 3 503.25~3 503.53 石膏 原生 180~205
    Y205 3 431.58~3 431.82 方解石 原生 125~130
    Y208 3 830.17~3 830.37 方解石 原生 140~188
    Y208 3 831.05 石膏 原生 145~162
    Y209 4 453.00~4 453.25 方解石 原生 140~158
    Y209 4 459.93~4 460.13 方解石 原生 148~172
    下载: 导出CSV
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  • 收稿日期:  2023-05-31
  • 修回日期:  2024-03-14
  • 刊出日期:  2024-05-28

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