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四川盆地涪陵气田白马区块效益开发实践与对策

刘超 包汉勇 万云强 甘玉青

刘超, 包汉勇, 万云强, 甘玉青. 四川盆地涪陵气田白马区块效益开发实践与对策[J]. 石油实验地质, 2023, 45(6): 1050-1056. doi: 10.11781/sysydz2023061050
引用本文: 刘超, 包汉勇, 万云强, 甘玉青. 四川盆地涪陵气田白马区块效益开发实践与对策[J]. 石油实验地质, 2023, 45(6): 1050-1056. doi: 10.11781/sysydz2023061050
LIU Chao, BAO Hanyong, WAN Yunqiang, GAN Yuqing. Beneficial development practice and countermeasures of Baima block in Fuling shale gas field, Sichuan Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2023, 45(6): 1050-1056. doi: 10.11781/sysydz2023061050
Citation: LIU Chao, BAO Hanyong, WAN Yunqiang, GAN Yuqing. Beneficial development practice and countermeasures of Baima block in Fuling shale gas field, Sichuan Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2023, 45(6): 1050-1056. doi: 10.11781/sysydz2023061050

四川盆地涪陵气田白马区块效益开发实践与对策

doi: 10.11781/sysydz2023061050
基金项目: 

中国石油化工股份有限公司科技项目“白马区块常压页岩气富集高产机理与目标评价” P21087-1

详细信息
    作者简介:

    刘超(1982—),男,硕士,副研究员,从事气藏地质综合评价研究。E-mail: hxliuch.jhyt@sinopec.com

  • 中图分类号: TE32

Beneficial development practice and countermeasures of Baima block in Fuling shale gas field, Sichuan Basin

  • 摘要: 近年来,涪陵页岩气田在积极推进焦石坝等高压页岩气藏开发调整的同时,为了确保气田持续稳产能力,开发对象也向白马等复杂构造区块稳步拓展。基于白马区块构造变形强、地质条件复杂、单井产能低、开发难度大等问题,通过断裂带方解石U-Pb定年、三维应力场建模、地质工程一体化评价等技术方法,深入研究白马区块的构造变形期次、应力场分布特征、开发有利目标、开发技术对策等,取得了积极进展:提出了逆冲推覆作用力是涪陵地区海相常压页岩气藏构造变形差异的主控因素;创建了“两类6项”的开发选区评价参数体系,明确了白马向斜核部以南为效益建产最有利目标;形成了以天然裂缝发育特征为核心的差异化开发技术政策;形成了基于气井埋深、应力性质、裂缝等不同地质特征的工程工艺对策。在上述认识基础上,按照“整体部署、评建一体、平台接替”思路,2021—2022年部署实施开发井位30口,平均机械钻速提高38%,压裂施工速度提升2~3倍,单段压裂费用降至85万元,日产气量稳定在80万方,2022年年产气量达2.24亿方,基本实现了效益开发。

     

  • 图  1  四川盆地白马区块上奥陶统五峰组底界构造

    Figure  1.  Structural map of the bottom boundary of Upper Ordovician Wufeng Formation in Baima block, Sichuan Basin

    图  2  四川盆地白马区块上奥陶统五峰组—下志留统龙马溪组一段沉积相

    Figure  2.  Sedimentary facies of the Upper Ordovician Wufeng Formation-first member of the Lower Silurian Longmaxi Formation in Baima block, Sichuan Basin

    图  3  四川盆地白马区块应力方向及大小实测与模拟结果对比

    Figure  3.  Comparison between measured and simulated results of stress direction and magnitude in Baima block, Sichuan Basin

    图  4  四川盆地白马区块不同井、井组压裂速度对比

    Figure  4.  Comparison of fracturing rate of different wells and well groups in Baima block, Sichuan Basin

    表  1  四川盆地白马区块与焦石坝区块不同沉积微相页岩测井解释统计

    Table  1.   Statistics for logging interpretation of shales of different sedimentary microfacies in Baima and Jiaoshiba blocks, Sichuan Basin

    沉积微相 井号 有机碳含量/% 硅质含量/% 孔隙度/% 吸游比
    硅质深水陆棚微相 焦石坝 3.7 53 4.56 0.90
    焦页A 3.6 48 3.39 1.21
    焦页B 3.6 59 3.53 0.94
    含黏土硅质深水陆棚微相 焦石坝 2.6 46 4.99 0.73
    焦页A 2.5 44 3.48 0.95
    焦页B 2.7 50 3.55 0.87
    硅质黏土深水陆棚微相 焦石坝 2.0 43 3.78 0.69
    焦页A 1.8 43 3.29 0.78
    焦页B 1.9 47 2.26 1.05
    黏土质深水陆棚微相 焦石坝 1.6 36 4.97 0.58
    焦页A 1.6 36 4.21 0.65
    焦页B 1.6 43 2.96 0.84
    下载: 导出CSV

    表  2  四川盆地白马区块与涪陵气田不同产建区构造特征对比

    Table  2.   Comparison of structural characteristics between different production and construction areas in Baima block and Fuling shale gas field, Sichuan Basin

    区块 构造形态 断裂发育程度/(条/km2) 地层产状/(°) 埋深/m 最大主应力方向
    焦石坝 箱状背斜 <0.05 <10 2 500~3 500 近东西向
    江东 高陡斜坡 <0.1 5~20 3 000~4 000 近东西向
    平桥 窄陡背斜 <0.1 5~30 2 500~4 000 北西—南东向
    白马 窄陡背斜、高陡斜坡窄陡向斜、宽缓向斜 >0.3 5~50 2 000~4 800 北东—南西向北西—南东向
    下载: 导出CSV

    表  3  四川盆地涪陵地区断裂带方解石U-Pb定年数据

    Table  3.   U-Pb dating of calcites from fracture zone in Fuling area, Sichuan Basin

    断裂方向 典型断层 同位素年/Ma 构造期次 挤压方向
    北东向断裂 齐岳山断层 135.43±8.12 燕山晚期 南东—北西向
    47.67±5.58 喜马拉雅早期 北西—南东向
    南北向断裂 乌江断层 27.8±4.8 喜马拉雅晚期 近东西向
    下载: 导出CSV

    表  4  四川盆地白马区块页岩气开发选区地质参数体系

    Table  4.   Geological parameter system of shale gas development area selection in Baima block, Sichuan Basin

    类别 含气性评价参数 可压性评价参数
    孔隙度/% 压力系数 含气饱和度/% 埋深/m 天然裂缝(曲率) 应力性质
    Ⅰ类 ≥4.0 ≥1.3 ≥60 ≤3 500 低值斑点状曲率
    非均质性弱
    中—弱挤压
    Ⅱ类 3.0~4.0 1.1~1.3 50~60 3 500~4 000 空白曲率或中值条带状曲率
    非均质性弱
    中—弱拉张
    Ⅲ类 2.0~3.0 0.9~1.3 40~50 4 000~4 500 单方向高值条带状曲率
    非均质性强
    强挤压
    强拉张
    Ⅳ类 <2.0 <0.9 <40 >4 500 多方向高值条带状曲率
    非均质性强
    强挤压
    强拉张
    下载: 导出CSV
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出版历程
  • 收稿日期:  2023-08-31
  • 修回日期:  2023-10-12
  • 刊出日期:  2023-11-28

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