压裂液对低渗砂岩气藏的水敏性伤害实验研究

刘彦学, 王宝峰, 刘建坤

刘彦学, 王宝峰, 刘建坤. 压裂液对低渗砂岩气藏的水敏性伤害实验研究[J]. 石油钻探技术, 2013, 41(1): 70-75. DOI: 10.3969/j.issn.1001-0890.2013.01.014
引用本文: 刘彦学, 王宝峰, 刘建坤. 压裂液对低渗砂岩气藏的水敏性伤害实验研究[J]. 石油钻探技术, 2013, 41(1): 70-75. DOI: 10.3969/j.issn.1001-0890.2013.01.014
Liu Yanxue, Wang Baofeng, Liu Jiankun. Experimental Study on Water Sensitive Damage of Fracturing Fluid to Low Permeability Gas Reservoirs[J]. Petroleum Drilling Techniques, 2013, 41(1): 70-75. DOI: 10.3969/j.issn.1001-0890.2013.01.014
Citation: Liu Yanxue, Wang Baofeng, Liu Jiankun. Experimental Study on Water Sensitive Damage of Fracturing Fluid to Low Permeability Gas Reservoirs[J]. Petroleum Drilling Techniques, 2013, 41(1): 70-75. DOI: 10.3969/j.issn.1001-0890.2013.01.014

压裂液对低渗砂岩气藏的水敏性伤害实验研究

详细信息
    作者简介:

    刘彦学(1966-),男,吉林公主岭人,1991年毕业于石油大学(华东)钻井工程专业,高级工程师,主要从事石油工程技术研究及现场技术管理等方面的工作。联系方式(0431)87984428,yxuel@163.com。

  • 中图分类号: TE357.1

Experimental Study on Water Sensitive Damage of Fracturing Fluid to Low Permeability Gas Reservoirs

  • 摘要: 为了客观准确地评价压裂液对低渗砂岩气藏的水敏性伤害,开展了伤害机理研究。以压裂液"平行液"为实验液体,基于X衍射、扫描电镜及岩心流动实验结果,将核磁共振技术应用于水敏性伤害机理,对胍胶压裂液和酸性压裂液造成的水敏性伤害进行了评价。结果表明:两种压裂液对应"平行液"对岩心造成的水敏性伤害均值分别为12.68%和12.77%;伤害程度大小主要取决于岩心中伊/蒙间层、伊利石的绝对含量以及黏土矿物的总含量,而与压裂液"平行液"类型无严格关系;返排程度与水敏性伤害有一定关系,返排量为0~2倍孔隙体积时,伤害率表现出增大的趋势,返排量为2~10倍孔隙体积时,伤害率趋于稳定;不同孔隙类型岩心由于不同类型压裂液入侵造成水敏性伤害后,表现出不同的核磁共振特征。通过研究,提供了一种定性评价压裂液对油气储层水敏性伤害的新方法。
    Abstract: Water sensitivity damage mechanism is investigated to accurately assess damage from fracturing fluid to low permeability gas reservoirs.Based on results of X-ray diffraction,scanning electron microscopy and core flow test results,nuclear magnetic resonance(NMR)technique was employed in the experiment to evaluate water sensitivity damage caused by guar gum fracturing fluid and acidic fracturing fluid.The results show that the average water sensitivity damage caused by the two fracturing fluids is 12.68% and 12.77%,respectively.The degree of sensitivity damage depends on the content of illite/smectite mixed layer or absolute illite content and total clay content,but has little relation to the type of fracturing fluid.There is a certain relationship between water sensitivity damage and flow back degree.The damage rate showed a rising tendency when the flow back volume is 0-2 times that of pore volume,and the damage rate was primarily stable when the flow back volume is 2-10 times that of pore volume.Water sensitivity experimental results of different types of pores and different fracturing fluids show different nuclear magnetic resonance(NMR)features.Through this study,a new qualitative approach to evaluate water sensitivity damage from fracturing fluids is proposed.
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出版历程
  • 收稿日期:  2012-05-31
  • 修回日期:  2012-11-22
  • 刊出日期:  1899-12-31

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