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川南威荣气田深层页岩气工程技术进展

王兴文 缪尉杰 何新星 许剑

王兴文, 缪尉杰, 何新星, 许剑. 川南威荣气田深层页岩气工程技术进展[J]. 石油实验地质, 2023, 45(6): 1170-1177. doi: 10.11781/sysydz2023061170
引用本文: 王兴文, 缪尉杰, 何新星, 许剑. 川南威荣气田深层页岩气工程技术进展[J]. 石油实验地质, 2023, 45(6): 1170-1177. doi: 10.11781/sysydz2023061170
WANG Xingwen, MIAO Weijie, HE Xinxing, XU Jian. Progress in deep shale gas engineering technology in Weirong gas field in southern Sichuan[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2023, 45(6): 1170-1177. doi: 10.11781/sysydz2023061170
Citation: WANG Xingwen, MIAO Weijie, HE Xinxing, XU Jian. Progress in deep shale gas engineering technology in Weirong gas field in southern Sichuan[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2023, 45(6): 1170-1177. doi: 10.11781/sysydz2023061170

川南威荣气田深层页岩气工程技术进展

doi: 10.11781/sysydz2023061170
基金项目: 

中国石化“十条龙”科技攻关项目 P18058

详细信息
    作者简介:

    王兴文(1975—),男,博士,高级工程师,从事油气田提高采收率与增产技术研究。E-mail: 414913973@qq.com

    通讯作者:

    缪尉杰(1995—),男,硕士,助理研究员,从事油气藏储层改造研究。E-mail: miaoweijie.xnyq@sinopec.com

  • 中图分类号: TE24

Progress in deep shale gas engineering technology in Weirong gas field in southern Sichuan

  • 摘要: 川南威荣气田是国内首个深层页岩气田,具有“一深、一薄、四高”的特点,钻完井、压裂及排采系列工程技术面临钻井周期长、改造体积小、复杂程度低、井筒流动规律复杂等挑战。针对复杂的地质挑战,不断深化地质认识,深度融合气藏地质与工程技术,围绕降本增效,以突破深层页岩气效益关为目标,持续攻关钻采工程工艺。历经三轮探索优化,钻井技术强化提高机械钻速,减少井下复杂情况风险,缩短钻井周期;压裂工艺优化裂缝配置提升复杂裂缝广度,转换思路大排量扩缝高携砂一体化实现了缝控体积的增加和支撑;排采工艺基于气液两相流研究识别井筒流态,形成全生命周期排采工艺决策方法。最终形成了以“精细轨迹控制优快钻井”、“裂缝均衡扩展强支撑压裂”、“全周期有效排采”为核心的工程技术序列,持续推进效益开发进程。所提出的深层页岩气开发工程技术在威荣气田累计新建产能25亿方,为国内外深层页岩气工程技术发展积累了宝贵经验,也为下一步超深层页岩气开发提供了探索方向。

     

  • 图  1  页岩气井井身结构优化调整过程

    Figure  1.  Optimization and adjustment process of shale gas wellbore structure

    图  2  川南深层页岩气年度钻井井下故障率

    Figure  2.  Annual downhole failure rate of deep shale gas in southern Sichuan

    图  3  不同阶段人工裂缝覆盖率

    Figure  3.  Hydraulic fracture coverage rate at different stages

    图  4  施工排量与裂缝内净压力的关系

    Figure  4.  Relationship between construction displacement and net pressure inside fractures

    图  5  三级裂缝导流能力关系

    Figure  5.  Relationship between conductivity of tertiary fractures

    图  6  深层页岩气全生命周期能量—流型图

    Figure  6.  Full life cycle energy-flow pattern diagram of deep shale gas

    表  1  威荣—永川气藏与国内外典型页岩气藏地质工程参数对比

    Table  1.   Comparison of geological engineering parameters among Weirong-Yongchuan gas reservoirs and typical shale gas reservoirs at home and abroad

    项目 威荣 永川 焦石坝 长宁 Haynesville
    埋深/m 3 550~3 880 3 800~4 200 2 400~3 500 2 300~3 200 3 200~3 900
    压力系数 1.9~2.1 1.6~2.0 1.35~1.55 1.4~2.03 1.60~2.00
    储层厚度/m 27~39 35~50 38~44 25~35 61~107
    孔隙度/% 4.6~6.5 5~6 2.5~7.1 3.5~7.0 8.0~9.0
    ω(TOC)/% 2.8~3.6 2.2~2.6 2.0~8.0 2.8~5.3 0.5~4.0
    含气量/(m3/t) 5~8 5~9 4.7~5.7 4.86~5.5 7.1~8.5
    硅质含量/% 38 42 43.78 25.8~67.6 25~52
    脆性矿物/% 60 55 56~83 57.8~60.1 65~80
    泊松比 0.23 0.25 0.19~0.24 0.16~0.24 0.23~0.27
    杨氏模量/GPa 21.6 26.8 25~49 13~41 14~21
    脆性指数 0.43 0.4 0.45~0.54 0.42~0.43 0.37~0.55
    最小水平应力/MPa 86~98 90~100 48.3~58.4 49~60 <84
    应力差/MPa 10~16 10~20 5~8.2 16.7~18.3 <5
    下载: 导出CSV

    表  2  钻井工艺参数优化

    Table  2.   Optimization of drilling process parameters

    开次 钻头Φ/mm 型号 钻压/kN 优化前转速/(r/min) 排量/(L/s) 钻压/kN 优化后转速/(r/min) 排量/(L/s)
    一开 406.4 TS619/KS1662 40~80 60 55~65 60~120 70~80 60~65
    二开 311.2 TS716/KMD1663/ES1645 60~160 60 55~60 100~180 70~80 60~70
    三开 215.9 AT505/TK56/MDI516 60~120 60 28~30 80~160 70~80 32~35
    下载: 导出CSV

    表  3  深层页岩气差异化排采对策

    Table  3.   Differential drainage and production measures for deep shale gas

    生产通道 生产阶段 参数特征 排采决策
    套管 自喷生产 压力系数>1 控压采气
    压力系数0.5~1,套压>21 MPa
    压力系数0.5~1,套压<21 MPa 下油管
    携液困难 压力系数<0.5
    油管 自喷生产 环状流型、积液高度<100 m 控压采气
    轻度积液 段塞流型,积液高度<400 m 自身能量排采
    重度积液 积液高度>400 m 人工增能排采
    泡状流型
    下载: 导出CSV
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出版历程
  • 收稿日期:  2023-08-24
  • 修回日期:  2023-10-09
  • 刊出日期:  2023-11-28

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