纳米封堵剂性能评价及机理分析
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摘要
页岩气开发中,保证井壁稳定是其关键技术之一,钻井液良好的封堵能力是井壁稳定的基础,而封堵剂则是钻井液良好封堵能力的基本保障。但泥页岩地层微裂缝微孔隙发育多,通常处于纳微米级,渗透率极低,普通封堵剂固相颗粒粒径较大,难以进入泥页岩地层形成有效的封堵,而纳米级封堵剂则能对泥页岩地层表现出良好的封堵性能。文章在分析前人对封堵剂评价方法基础上,采用不同级配固相颗粒人造滤饼的方法来模拟泥页岩低孔低渗的特性,对3种封堵剂(聚合醇JH-1,纳米LAT,纳米Fe_3O_4)在不同的温度及浓度加量条件下进行了封堵性能评价,确定了3种封堵剂的适用温度和最佳加量,并对它们的封堵机理进行了简单的分析。
In the development of shale gas,it is key to ensure the borehole stability. A good plugging performance of drilling fluid is the foundation of wellbore stability,and the plugging agent is the basic guarantee. However,the micro pores d and cracks,usually in nanometer-scale,are developed a lot in mudstone and shale,the formation permeability is very low. The solid particles of ordinary blocking agent are larger in diameter and difficult to enter into shale formation to form an effective plugging. The nanoscale plugging agent can form a good plugging. In this paper,based on the analysis of previous evaluation methods for plugging agents,the artificial mud cakes with different graded solid particles are used to simulate the characteristics of low porosity and low permeability shale. Three kinds of blocking a-gents( polyalcohol polyol JH-1,Nano-LAT and Nano Fe3 O4)are used to evaluate their plugging performance under different temperatures and at different concentrations. The applicable temperatures and the optimum dosage of the three plugging agents are determined,and their plugging mechanism are analyzed briefly.
In the development of shale gas,it is key to ensure the borehole stability. A good plugging performance of drilling fluid is the foundation of wellbore stability,and the plugging agent is the basic guarantee. However,the micro pores d and cracks,usually in nanometer-scale,are developed a lot in mudstone and shale,the formation permeability is very low. The solid particles of ordinary blocking agent are larger in diameter and difficult to enter into shale formation to form an effective plugging. The nanoscale plugging agent can form a good plugging. In this paper,based on the analysis of previous evaluation methods for plugging agents,the artificial mud cakes with different graded solid particles are used to simulate the characteristics of low porosity and low permeability shale. Three kinds of blocking a-gents( polyalcohol polyol JH-1,Nano-LAT and Nano Fe3 O4)are used to evaluate their plugging performance under different temperatures and at different concentrations. The applicable temperatures and the optimum dosage of the three plugging agents are determined,and their plugging mechanism are analyzed briefly.
引文
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[10]张勇,褚奇,陈勇,等.低荧光防塌封堵剂的研制及评价[J].石油钻采工艺,2014(3):45-47.
[11]石秉忠,胡旭辉,高书阳,等.硬脆性泥页岩微裂缝封堵可视化模拟试验与评价[J].石油钻探技术,2014(3):32-37.
[12]付艳,黄进军,武元鹏,等.钻井液用纳米粒子封堵性能的评价[J].重庆科技学院学报(自然科学版),2013(3):30-31.
[13]李伟,王平全,王波,等.复配重晶石对水基钻井液滤饼质量的影响[J].重庆科技学院学报(自然科学版),2014(4):69-72.
[2]卢双舫,张亚念,李俊乾,等.纳米技术在非常规油气勘探开发中的应用[J].矿物岩石地球化学通报,2016(1):28-36.
[3]贾新驰,陆现彩,杨侃,等.泥质岩石纳米孔隙对孔内流体的局限效应[J].矿物岩石地球化学通报,2016(1):70-78.
[4]孙金声,张希文.钻井液技术的现状、挑战、需求与发展趋势[J].钻井液与完井液,2011(6):67-76.
[5]Zakaria M,Husein M M,Harland G.Novel Nanoparticle-Based Drilling Fluid with Improved Characteristics.[C].SPE 156992,2012.
[6]邓明毅,徐琳,郭拥军,等.纳米封堵剂在钻井液中的应用进展研究[J].应用化工,2016(4):1-5.
[7]陈斌,赵雄虎,李外,等.纳米技术在钻井液中的应用进展[J].石油钻采工艺,2016(3):315-321.
[8]张婷,白小东,肖丁元,等.纳米材料在钻井液中的应用研究进展[J].钻采工艺,2014(2):89-92.
[9]张洪伟,左凤江,李洪俊,等.微裂缝封堵剂评价新方法及强封堵钻井液配方优选[J].钻井液与完井液,2015(6):43-45.
[10]张勇,褚奇,陈勇,等.低荧光防塌封堵剂的研制及评价[J].石油钻采工艺,2014(3):45-47.
[11]石秉忠,胡旭辉,高书阳,等.硬脆性泥页岩微裂缝封堵可视化模拟试验与评价[J].石油钻探技术,2014(3):32-37.
[12]付艳,黄进军,武元鹏,等.钻井液用纳米粒子封堵性能的评价[J].重庆科技学院学报(自然科学版),2013(3):30-31.
[13]李伟,王平全,王波,等.复配重晶石对水基钻井液滤饼质量的影响[J].重庆科技学院学报(自然科学版),2014(4):69-72.
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