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煤层气弱凝胶和微固相双效钻井液体系

王道宽 彭斌 乌效鸣 惠增辉

王道宽, 彭斌, 乌效鸣, 惠增辉. 煤层气弱凝胶和微固相双效钻井液体系[J]. 钻井液与完井液, 2017, 34(6): 35-40. doi: 10.3969/j.issn.1001-5620.2017.06.007
引用本文: 王道宽, 彭斌, 乌效鸣, 惠增辉. 煤层气弱凝胶和微固相双效钻井液体系[J]. 钻井液与完井液, 2017, 34(6): 35-40. doi: 10.3969/j.issn.1001-5620.2017.06.007
WANG Daokuan, PENG Bin, WU Xiaoming, HUI Zenghui. Dual-effect Drilling Fluids with Weak Gel and Micro Solids for CBM Drilling[J]. DRILLING FLUID & COMPLETION FLUID, 2017, 34(6): 35-40. doi: 10.3969/j.issn.1001-5620.2017.06.007
Citation: WANG Daokuan, PENG Bin, WU Xiaoming, HUI Zenghui. Dual-effect Drilling Fluids with Weak Gel and Micro Solids for CBM Drilling[J]. DRILLING FLUID & COMPLETION FLUID, 2017, 34(6): 35-40. doi: 10.3969/j.issn.1001-5620.2017.06.007

煤层气弱凝胶和微固相双效钻井液体系

doi: 10.3969/j.issn.1001-5620.2017.06.007
基金项目: 

国家科技重大专项“山西重点煤矿区煤层气与煤炭协调开发示范工程”(2016ZX05067)和山西省煤基重点科技攻关项目“煤层气钻井关键技术及装备研发”(MQ2014-04)资助项目。

详细信息
    作者简介:

    王道宽,1989年生,工程师,主要从事电力工程岩土工程勘察设计工作。电话15002736599;E-mail:wangdaokuan891112@126.com。

  • 中图分类号: TE254.3

Dual-effect Drilling Fluids with Weak Gel and Micro Solids for CBM Drilling

  • 摘要: 为更好满足煤层气钻井液成膜护壁和尽可能地降低对煤层气储层的伤害,实现安全、高效钻进和保护储层的目的,提出了弱凝胶和微固相双效钻井液体系。室内对其性能进行了评价,结果表明:弱凝胶和微固相双效钻井液具有良好的基础性能;具有很好抑制性、抗温性(50℃)、抗盐(NaCl、CaCl2、MgCl2)侵性和抗煤屑侵性;在500 mL双效钻井液中加入纤维素酶、中性α-淀粉酶、复合酶(0.1 g:0.1 g:0.1 g),最终弱凝胶和微固相钻井液降解率分别可达90.9%和83.0%;具有很好的润滑性,润滑系数分别为0.17和0.12;渗透率恢复率可达到91.3%和82.3%;显微观测可知,增大了钻井液接触角,可很好防止水锁伤害;复合生物酶不仅能降低钻井液表观黏度,在后期通过降解泥皮来降低对煤储层裂隙的伤害,可大大减小对煤层气产出影响。

     

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出版历程
  • 收稿日期:  2017-08-22
  • 刊出日期:  2017-11-30

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