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绒囊流体控制煤岩储层水力裂缝形态研究

聂帅帅,  郑力会,  孟尚志,  魏攀峰,  张贺,  孙昊

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文章导航 > 钻井液与完井液  > 2019 >  36(5): 639-645
聂帅帅, 郑力会, 孟尚志, 魏攀峰, 张贺, 孙昊. 绒囊流体控制煤岩储层水力裂缝形态研究[J]. 钻井液与完井液, 2019, 36(5): 639-645. doi: 10.3969/j.issn.1001-5620.2019.05.020
引用本文: 聂帅帅, 郑力会, 孟尚志, 魏攀峰, 张贺, 孙昊. 绒囊流体控制煤岩储层水力裂缝形态研究[J]. 钻井液与完井液, 2019, 36(5): 639-645. doi: 10.3969/j.issn.1001-5620.2019.05.020
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NIE Shuaishuai, ZHENG Lihui, MENG Shangzhi, WEI Panfeng, ZHANG He, SUN Hao. Control the Crack Morphology of Hydraulic Fracture by Fuzzy-ball Fluid in Coal Seam[J]. DRILLING FLUID & COMPLETION FLUID, 2019, 36(5): 639-645. doi: 10.3969/j.issn.1001-5620.2019.05.020
Citation: NIE Shuaishuai, ZHENG Lihui, MENG Shangzhi, WEI Panfeng, ZHANG He, SUN Hao. Control the Crack Morphology of Hydraulic Fracture by Fuzzy-ball Fluid in Coal Seam[J]. DRILLING FLUID & COMPLETION FLUID, 2019, 36(5): 639-645. doi: 10.3969/j.issn.1001-5620.2019.05.020
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绒囊流体控制煤岩储层水力裂缝形态研究

doi: 10.3969/j.issn.1001-5620.2019.05.020

  • 1. 中国石油大学(北京)石油工程学院, 北京 102249;

  • 2. 承德石油高等专科学校石油工程系, 河北承德 067000;

  • 3. 中联煤层气有限责任公司, 北京 100011

基金项目: 

国家科技重大专项"三气"合采钻完井技术与储层保护"（2016ZX05066002）

详细信息
    作者简介:

    聂帅帅,硕士,1992年生;主要研究储层伤害治理方法和关键技术。电话(010)89731026;E-mail:lihuilab@lihuilab.com

  • 中图分类号: TE357.12

Control the Crack Morphology of Hydraulic Fracture by Fuzzy-ball Fluid in Coal Seam

  • 1. College of Petroleum Engineering, China University of Petroleum, Beijing, Beijing 102249;

  • 2. School of Petroleum Engineering, Chengde Petroleum College, Chengde, Hebei 067000;

  • 3. China United Coalbed Methane Corp., Ltd., Beijing 100011

    摘要
  • 摘要: 煤岩储层水力裂缝易随割理和天然裂缝转向延伸，致使水力裂缝形态不规则且横向延伸较短。欲采用绒囊流体作为压裂液，在压裂过程中暂堵割理和天然裂缝，使压力向垂直于井筒的方向传递，从而形成规则长缝。室内测试绒囊压裂流体暂堵煤岩柱塞剖缝承压能力18 MPa，能够阻止裂缝向割理和天然裂缝方向偏转；绒囊压裂流体伤害煤基质渗透率恢复值86%，满足压后产气要求；φ0.9 mm陶粒在绒囊压裂流体中的沉降速率0.003 cm/s，满足携砂要求。X井压裂现场配制绒囊压裂流体520 m3，采用井筒加砂分隔的方式分层压裂山西组和太原组煤层。绒囊携砂液泵注过程中，施工压力稳定在14.64~15.99 MPa之间，表明水力裂缝延伸过程中未出现堵塞和转向。压后模拟发现，太原组缝长155.7 m，缝高41.3 m；山西组缝长163.9 m，缝高47.5 m。因此，绒囊流体能够作为压裂液形成规则长缝，解决了煤岩储层造缝不理想的难题。

     

    Abstract: The direction of hydraulic fractures in the coal seam is diverted along the direction of cutting and natural fractures, the crack morphology of hydraulic fracture is irregular and elongated. Using Fuzzy-ball temporary plugging natural cracks to form regular cracks. Laboratory tests show that the settlement rate of φ0.9 mm ceramsite in Fuzzy-ball fluid is 0.003 cm/s, meeting the requirements of carrying sand; The pressure capacity of the crack plugged with Fuzzy-ball is 18 MPa, able to prevent hydraulic fractures extending in the direction of cleat or natural fractures. Fuzzy-bal fluid damage coal rock permeability recovery value is 86%, satisfying gas production requirements. Field preparation apparent Fuzzy-ball fluid 520 m3. Separate Shanxi and Taiyuan coal seams by sand for stratified fracturing. During the pumping process of sand carrying liquid, the pump pressure is stable at 14.64-15.99 MPa, indicating that there is no blockage and diversion in the process of hydraulic fracture extension. The simulation results show that the fracture length and height of Taiyuan Formation are 155.7 m and 41.3 m respectively, and the fracture length and height of Shanxi coal seams are 163.9 m and 47.5 m respectively. Therefore, Fuzzy-ball fluid can be used to produce a long crack in coal seam, solving the problem of unsatisfactory hydraulic fracturing effect in coal seam.

     

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