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松藻矿区多煤层合采储层压降特征及启示

吴国代 郭东鑫 程礼军 程军 朱长生 谢庆明 刘代喜 王开文

吴国代, 郭东鑫, 程礼军, 程军, 朱长生, 谢庆明, 刘代喜, 王开文. 松藻矿区多煤层合采储层压降特征及启示[J]. 煤田地质与勘探, 2018, 46(5): 123-128. doi: 10.3969/j.issn.1001-1986.2018.05.019
引用本文: 吴国代, 郭东鑫, 程礼军, 程军, 朱长生, 谢庆明, 刘代喜, 王开文. 松藻矿区多煤层合采储层压降特征及启示[J]. 煤田地质与勘探, 2018, 46(5): 123-128. doi: 10.3969/j.issn.1001-1986.2018.05.019
WU Guodai, GUO Dongxin, CHENG Lijun, CHENG Jun, ZHU Changsheng, XIE Qingming, LIU Daixi, WANG Kaiwen. Characteristics and revelation of pressure drop of reservoir during combined CBM production of multi-coal seams in Songzao mining area[J]. COAL GEOLOGY & EXPLORATION, 2018, 46(5): 123-128. doi: 10.3969/j.issn.1001-1986.2018.05.019
Citation: WU Guodai, GUO Dongxin, CHENG Lijun, CHENG Jun, ZHU Changsheng, XIE Qingming, LIU Daixi, WANG Kaiwen. Characteristics and revelation of pressure drop of reservoir during combined CBM production of multi-coal seams in Songzao mining area[J]. COAL GEOLOGY & EXPLORATION, 2018, 46(5): 123-128. doi: 10.3969/j.issn.1001-1986.2018.05.019

松藻矿区多煤层合采储层压降特征及启示

doi: 10.3969/j.issn.1001-1986.2018.05.019
基金项目: 

重庆市国土资源和房屋管理局科技计划项目(KJ-2015017,KJ-2018030)

详细信息
    第一作者:

    吴国代,1982年生,男,湖北通城人,高级工程师,从事煤层气开发地质研究.E-mail:miahwu@qq.com

  • 中图分类号: P618.11

Characteristics and revelation of pressure drop of reservoir during combined CBM production of multi-coal seams in Songzao mining area

Funds: 

Science and Technology Plan of Chongqing Land Resource and House Administration(KJ-2015017,KJ-2018030)

  • 摘要: 西南地区晚二叠世龙潭组煤层气勘探开发取得较好的成效,该层位弱含水性制约着煤层气的排采。为揭示多煤层合采条件下煤储层的压降特征,以平面径向渗流理论为指导,利用松藻矿区Q1井地质工程数据,基于井底流压、套压、日产水量、日产气量数据的综合分析,建立了纵向上不同储层的井底流压数学模型,并分析不同储层的压降特征。研究表明:M6、M7、M8煤层的初始产气时间分别为45d、162d、217d;储层压力和渗透率控制储层供液能力,导致压降效果随层位的降低而降低;储层临界解吸压力相差较大(4.07 MPa)和日产水量低(0.23 m3)影响多煤层的合采效果。加强选层综合研究、产水特征分析和注水时机研究,开展递进排采相关工艺设备研发和工程探索是弱含水煤层群合采的重要工作方向。

     

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  • 收稿日期:  2018-06-15
  • 发布日期:  2018-10-25

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