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水力压裂是低渗透储层改造的重要技术手段,在实践应用中的重要性渐渐被人们认可。在油田开发过程中,自水力压裂技术应用以来,它已经成为并且还将继续成为提高单井产量的基本手段之一。但是这种技术也会产生一定的不利影响,例如压裂液的虑失会使井筒底层附近表皮系数增加,进而对底层造成伤害,并且会使储层中支撑剂的支撑效率增加,要降低这种不利影响就必须需找合适的办法解决,目前大多采用裂缝强制闭合技术。本文在总结前人已有成果的基础上,对裂缝强制闭合模型进行了研究,研究成果对于丰富压裂设计模型具有理论意义,对指导压裂液返排有一定的现实意义。
Hydraulic fracturing is an important technological means for the transformation of low permeability reservoirs, and its importance in practical applications is gradually recognized. In the field of oilfield development, since the application of hydraulic fracturing technology, it has become and will continue to be one of the basic means to improve single-well production. However, this technique also has some adverse effects. For example, the loss of fracturing fluid will increase the coefficient of the skin near the bottom of the wellbore and further damage the bottom layer, and will increase the proppant supporting efficiency in the reservoir. The adverse effects must be found in the right way to solve, most of the current use of forced closure technology cracks. Based on the conclusion of previous achievements, this paper studies the forced closure model of fractures. The research results have theoretical significance for enriching fracturing design models and have certain practical significance for directing fracturing fluid return.