压裂液对致密油储层人工裂缝渗透率的影响分析

对于致密油储层来说,目前国内外对其开采主要是通过压裂形成人工裂缝增加储层的渗流能力,提高原油产量。然而在压裂施工的过程中势必会造成压裂液对地层的伤害及对支撑裂缝导流能力的伤害。弄清压裂液对人工裂缝渗透率的影响因素,对于提高致密油储层压裂改造效果及提高原油产量有着重要的意义。本文是针对致密油储层的真实岩心人工裂缝,进行室内试验研究,主要从压裂液破胶液对人工裂缝的伤害出发,研究了破胶液对人工裂缝的伤害及对渗透率的影响,支撑剂的分布对人工裂缝渗透率的影响及破胶液对支撑剂分布的影响等几个方面进行了系统的研究。并得出了影响人工裂缝渗透率的主要因素是裂缝断面粗糙度、支撑剂的运移及裂缝表面的性质等。

Analysis the impact of fracturing fluid tight oil reservoir artificial fracture permeability

For tight oil reservoirs,the current method is mainly through fracturing to increase flow capacity and improve oil production in the domestic and abroad.However,in the fracturing process will inevitably lead to fracturing fluid formation damage and propped fracture conductivity damage.Understand the factors of the fracturing fluid affecting the artificial fracture permeability,for improving the effect of tight oil reservoir fracturing and enhanced oil production has important significance.This paper is aimed at the real core of artificial fractures in tight oil reservoirs,indoor test and research,mainly from the fracturing fluid gel breaking liquid on the damage of the artificial fracture,the gel breaking liquid on the artificial fracture damage and influence on permeability,the distribution of proppant of artificial fracture permeability and gel breaking liquid on the influence of the distribution of the proppant from several aspects such as the study of the system.And reached the main factors affecting the artificial fracture permeability is the fracture section roughness,the transport of proppant and the fracture in the surface properties.