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纳米孔缝下压裂液对页岩中甲烷运移的影响

王海燕 郭丽梅 胥云 刘萍 管保山 吴家全 薛延萍

王海燕, 郭丽梅, 胥云, 刘萍, 管保山, 吴家全, 薛延萍. 纳米孔缝下压裂液对页岩中甲烷运移的影响[J]. 钻井液与完井液, 2018, 35(3): 105-109. doi: 10.3969/j.issn.1001-5620.2018.03.018
引用本文: 王海燕, 郭丽梅, 胥云, 刘萍, 管保山, 吴家全, 薛延萍. 纳米孔缝下压裂液对页岩中甲烷运移的影响[J]. 钻井液与完井液, 2018, 35(3): 105-109. doi: 10.3969/j.issn.1001-5620.2018.03.018
WANG Haiyan, GUO Limei, XU Yun, LIU Ping, GUAN Baoshan, WU Jiaquan, XUE Yanping. Effect of Fracturing Fluid on the Migration of Methane in Shale with Nano-sized Fractures[J]. DRILLING FLUID & COMPLETION FLUID, 2018, 35(3): 105-109. doi: 10.3969/j.issn.1001-5620.2018.03.018
Citation: WANG Haiyan, GUO Limei, XU Yun, LIU Ping, GUAN Baoshan, WU Jiaquan, XUE Yanping. Effect of Fracturing Fluid on the Migration of Methane in Shale with Nano-sized Fractures[J]. DRILLING FLUID & COMPLETION FLUID, 2018, 35(3): 105-109. doi: 10.3969/j.issn.1001-5620.2018.03.018

纳米孔缝下压裂液对页岩中甲烷运移的影响

doi: 10.3969/j.issn.1001-5620.2018.03.018
基金项目: 

国家重大项目“井筒工作液新材料新体系基础研究”(2016A-3903),国家重大专项“储层改造关键流体研发”(2017ZX05023003)

详细信息
    作者简介:

    王海燕,高级工程师,1972年生,毕业于中国石油大学(北京)油气井工程专业,现主要从事压裂酸化产品开发及应用。电话(010)69213729;E-mial:wanghaiy69@petrochina.com.cn。

  • 中图分类号: TE357.12

Effect of Fracturing Fluid on the Migration of Methane in Shale with Nano-sized Fractures

  • 摘要: 压裂体积改造以及页岩自身性质都会产生大量纳米级微孔缝,通过模拟计算、实验数据并结合现场数据研究水滞留在页岩中对甲烷解吸运移的影响,通过经验公式计算得出,纳米环境下甲烷以间隙填充和水合溶解方式与水形成水溶气。分子动力学模拟显示水在纳米环境中分子有序度增加,链间氢键力减少,流动阻力小,扩散系数比宏观环境增大2个数量级;纳米通道内水中溶入甲烷后,扩散系数比单纯纳米环境中水大2个数量级,链间氢键力更小,流动几乎无阻力。页岩的毛细渗透可以使水进入纳米孔缝,吸附在页岩表面无法返排,造成返排率低。水进入页岩中竞争吸附置换甲烷,减少甲烷吸附量,有利于产能,但在低含水饱和度环境下,甲烷在水中溶解会造成一定永久残留,预吸水活性炭吸附解吸实验数据显示,当水量与孔容体积相当时,与干活性炭比较,甲烷吸附量减少60%,而溶解等综合因素无法解吸的甲烷残留最高为13.5%,几乎无自由水返出,综合结果水的存在正向贡献大。

     

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出版历程
  • 收稿日期:  2017-01-05
  • 刊出日期:  2018-05-30

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