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深层常压页岩气工程技术新进展与发展建议

张文平 李双明 张金成 张彦仪 闵文宣

张文平, 李双明, 张金成, 张彦仪, 闵文宣. 深层常压页岩气工程技术新进展与发展建议[J]. 石油实验地质, 2023, 45(6): 1151-1159. doi: 10.11781/sysydz2023061151
引用本文: 张文平, 李双明, 张金成, 张彦仪, 闵文宣. 深层常压页岩气工程技术新进展与发展建议[J]. 石油实验地质, 2023, 45(6): 1151-1159. doi: 10.11781/sysydz2023061151
ZHANG Wenping, LI Shuangming, ZHANG Jincheng, ZHANG Yanyi, MIN Wenxuan. Progress and development suggestions of deep normal pressure shale gas engineering technology[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2023, 45(6): 1151-1159. doi: 10.11781/sysydz2023061151
Citation: ZHANG Wenping, LI Shuangming, ZHANG Jincheng, ZHANG Yanyi, MIN Wenxuan. Progress and development suggestions of deep normal pressure shale gas engineering technology[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2023, 45(6): 1151-1159. doi: 10.11781/sysydz2023061151

深层常压页岩气工程技术新进展与发展建议

doi: 10.11781/sysydz2023061151
基金项目: 

中国石化科技攻关项目 P22183

中国石化科技攻关项目 P22095

中国石化页岩油气钻完井及压裂重点实验室开放基金 35800000-23-ZC0613-0005

详细信息
    作者简介:

    张文平(1989—),男,副研究员,主要从事钻井工艺与井下工具研究。E-mail: zhangwp.sripe@sinopec.com

  • 中图分类号: TE2

Progress and development suggestions of deep normal pressure shale gas engineering technology

  • 摘要: 与中浅层页岩气勘探开发相比,深层页岩气埋藏深、构造复杂、压力体系多变,钻井提速难;储层可压性差、体积改造难。如何提高钻完井效率、降低钻完井成本,是实现深层页岩气经济效益开发最大的挑战。为明确当前深层常压页岩气钻完井技术水平和存在的问题,总结分析国内外深层页岩气钻完井工程新进展,指出了当前存在的问题并提出了发展建议。在四川盆地威荣、永川等区块已经实现了深层常压页岩气的经济效益开发,基本形成了以低成本高性能油基钻井液、强化钻井参数、配套大扭矩螺杆和个性化钻头、长水平井精准导向和高效控制、钻井实时监测与智能优化为核心的深层页岩气长水平井高效钻井技术体系,水平段最长长度达4 386 m,最长一趟钻进尺达4 225 m。但与北美地区先进钻井指标相比,国产螺杆寿命、旋转导向工具稳定性和可靠性、超级一趟钻技术与比率、近钻头推靠工具还存在一定差距,需进一步加大核心配套工具和技术研发,进一步提高深层页岩气井的钻井效率。北美地区受经济开发效益限制而较少开发4 200 m以深的深层页岩气,国内已经突破了4 700 m深层页岩气体积压裂技术,形成了以压裂工艺、分段工具、主体材料和监测技术为核心的独立自主的4 700 m以浅深层页岩气压裂技术体系。但在复杂构造区深层和超深层页岩储层中形成复杂裂缝网难度大,还需进一步完善裂缝扩展机理研究,研发降阻性能更好的压裂液体系和175 MPa压裂装备,以尽快突破4 700~6 000 m埋深页岩气井高效压裂瓶颈。

     

  • 表  1  北美页岩气工程概况

    Table  1.   Overview of shale gas drilling engineering in North America

    项目 区块
    Eagle Ford Haynesville Cana Woodford
    垂深/m 1 200~4 300 3 200~4 900 1 000~5 000
    水平段长/m 1 000~3 500 1 000~3 500 1 000~3 500
    压力系数 1.35~1.80 1.80~2.00 1.58
    钻井周期/d 7~35 18~28.8 20~25
    水平井/百万美元成本 6.9~7.7 7.4~9.5 7.5~10.0
    下载: 导出CSV

    表  2  典型深层页岩区块地质特征参数对比

    Table  2.   Comparison of geological characteristic parameters of typical deep shale blocks

    项目 区块
    白马(JY7HF井) 丁山(DY2HF井) 威荣(WY1HF井) 永川(YY1HF井) Cana Woodford Haynesville
    深度/m 3 903 4 363 3 587 3 988 4 115 3 658
    优质页岩厚度/m 49.5 33 27.5 30 50 45
    孔隙度/% 3.12 5.81 4.01 5.3 6.5 10
    ω(TOC)/% 2.84 3.65 3.2 5.57 9 4
    含气性/(m3/t) 4.52 4.48 3.3~6.47 6.79 12
    地层压力系数 1.38 1.55 1.96 1.70 1.58 1.90
    脆性指数/% 55 45 46 50 60
    杨氏模量/103 MPa 36.7 32.32 33.84 31.45 34 18
    泊松比 0.22 0.2 0.237 0.228 0.18 0.27
    两向水平主地应力差/MPa 13 18 14 16 6 8
    应力梯度/(MPa/m) 0.022 0.023 0.023 0.022 5 0.02 0.022 6
    地表条件 山地 山地 山地 山地 平原 平原
    下载: 导出CSV
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  • 收稿日期:  2023-07-20
  • 修回日期:  2023-10-08
  • 刊出日期:  2023-11-28

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