页岩微裂缝模拟实验评价
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摘要
封堵技术一直是研究的重点,现如今在封堵问题上难有重大突破的主要原因之一为没有一个统一有效的评价方法,现今的评价方法都只适用于某个特定的对象和环境。随着对页岩气开发的需求,国内外没有一个针对超低渗地层的纳米级微裂缝封堵评价。文章在前人的研究基础上,拓展新的思路,在人造滤饼上进行人工造缝,重点是对裂缝的制备过程,通过模拟地层微裂缝来进行封堵性评价,用实验方法控制滤饼质量和强度来控制滤饼渗透率,从而来接近泥页岩真实渗透率,达到实现模拟低渗环境的目的。该评价方法的建立对封堵剂的优选、研制以及封堵效果评价都有着十分重要的指导意义,同时对其他裂缝型地层的封堵性能评价同样适用。
Plugging technology has been the focus of the study,but due to the lack of a unified evaluation method it is difficult to have a major breakthrough. The current evaluation methods are only suitable for certain objects and environment.For shale gas development,there is no nanocrack plugging evaluation method for extremely low permeability formations at home and abroad. As introduced in this paper,the artificial cracks are made on artificial mud cakes to study the plugging evaluation.The focus is on the preparation of cracks, the quality and strength of the mud cake are controlled by experiments to simulate a permeability environment close to the actual. The establishment of this evaluation method is of great significance for the selection,development and evaluation of the plugging agents,and it is also suitable for other fractured formations.
Plugging technology has been the focus of the study,but due to the lack of a unified evaluation method it is difficult to have a major breakthrough. The current evaluation methods are only suitable for certain objects and environment.For shale gas development,there is no nanocrack plugging evaluation method for extremely low permeability formations at home and abroad. As introduced in this paper,the artificial cracks are made on artificial mud cakes to study the plugging evaluation.The focus is on the preparation of cracks, the quality and strength of the mud cake are controlled by experiments to simulate a permeability environment close to the actual. The establishment of this evaluation method is of great significance for the selection,development and evaluation of the plugging agents,and it is also suitable for other fractured formations.
引文
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[2]陈爱云.分段压裂技术在高压深层页岩油井中的应用[J].云南化工,2018,45(2):150.
[3]马骁,高慧杰,常学平,等.井壁失稳机理分析及技术对策[J].化工管理,2017(4):111.
[4]邱正松,刘均一,周宝义,等.钻井液致密承压封堵裂缝机理与优化设计[J].石油学报,2016,37(s2):137-143.
[5]李媛珺,聂松.陕北地区页岩气成藏特征描述与资源预测[J].云南化工,2018,45(1):201.
[6]侯佳丽,邓明毅,张炜筠,等.硬脆性泥页岩微裂缝模拟研究[J].广东化工,2016,43(23):14-17.
[7]侯杰.硬脆性泥页岩微米-纳米级裂缝封堵评价新方法[J].石油钻探技术,2017(3):32-37.
[8]彭莹江.浅析页岩气钻完井存在问题及对策分析[J].云南化工,2018,45(1):121.
[9]王平全,马瑞.滤饼质量的影响因素研究[J].钻井液与完井液,2012,29(5):21-25.