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低压低渗煤层气多分支水平井开发关键技术研究——以沁水盆地郑庄区块15号煤层为例

齐恭, 李杨, 高鹏举, 董向宇. 2023. 低压低渗煤层气多分支水平井开发关键技术研究——以沁水盆地郑庄区块15号煤层为例. 钻探工程, 50(6): 108-113. doi: 10.12143/j.ztgc.2023.06.014
引用本文: 齐恭, 李杨, 高鹏举, 董向宇. 2023. 低压低渗煤层气多分支水平井开发关键技术研究——以沁水盆地郑庄区块15号煤层为例. 钻探工程, 50(6): 108-113. doi: 10.12143/j.ztgc.2023.06.014
QI Gong, LI Yang, GAO Pengju and DONG Xiangyu, . 2023. Analysis and understanding of factors affecting sandstone-type thermal storage recharge. DRILLING ENGINEERING, 50(6): 108-113. doi: 10.12143/j.ztgc.2023.06.014
Citation: QI Gong, LI Yang, GAO Pengju and DONG Xiangyu, . 2023. Analysis and understanding of factors affecting sandstone-type thermal storage recharge. DRILLING ENGINEERING, 50(6): 108-113. doi: 10.12143/j.ztgc.2023.06.014

低压低渗煤层气多分支水平井开发关键技术研究——以沁水盆地郑庄区块15号煤层为例

  • 基金项目:

    国家自然科学基金项目“煤矿采空区遗煤生物气化利用机理研究”(编号:42102218);山西省基础研究计划项目(自由探索类)“煤层气解吸-扩散-渗流气固耦合机理及多尺度模型研究”(编号:202303021211209);2022年晋城市重点研发计划(高新领域)项目”煤层气低效井改造潜力评价及增产技术研究“(编号:20220118)

详细信息
    作者简介: 齐恭,男,汉族,1971年生,高级工程师,探矿工程专业,从事水文水井钻探工作,河北省衡水市红旗大街808号,57006594@qq.com。

Analysis and understanding of factors affecting sandstone-type thermal storage recharge

  • 沁水盆地太原组15号煤层总体低压低渗低饱和,煤储层相对较薄,地质条件复杂,煤层气井产量普遍偏低。以沁水盆地郑庄区块为研究对象,依据本区15号煤层LDP-22H多分支水平井的成功开发经验,全面论述低压低渗煤储层煤层气钻完井工艺、标志层判定、井眼轨迹控制等关键技术。结果表明:采用钻井-录井-测井一体化地质导向技术可以有效卡准目的煤层,同时实时修正钻头轨迹,煤层平均钻遇率在97%以上,极大地提升了煤层有效进尺。865 d的排采实践表明,LDP-22H多分支水平井日产气量突破15万m3,日产气量稳定在8万m3左右,全程累计产气量为2091.5469.3 万m3,实现了超高产和稳产,标志着多分支水平井在低压低渗煤储层煤层气高效开发上有较好的适用性。另一方面,多分支水平井要优化井位,加强水平井底部位排采能力,稳定压降速率,减小对煤储层渗透率敏感性伤害,提高排采的连续性,减少停泵和检修作业频次,保证产能的延续性。
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出版历程
收稿日期:  2023-03-24
修回日期:  2023-06-19

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