油田转向压裂用暂堵剂研究进展

暂堵剂能够暂时封堵高渗层,迫使工作液转向压裂低渗层,进而实现储层的均匀改造,具有封堵强度大、对地层无伤害、施工工艺简单等优点。根据暂堵剂在裂缝中作用机理的不同,本文将暂堵剂分为颗粒类、纤维类、胶塞类和复合类等四种类型,综述了四种类型暂堵剂的暂堵机理、技术特点以及现场应用情况。

Advancement of Temporary Plugging Agent for Fracturing in Oilfield

Temporary plugging agent can divert the fracturing fluid into lower permeability layer by plugging higher permeability layer, then the uniform stimulating in reservoir can be achieved. Temporary plugging agent had the properties of high plugging strength, no damage to formation and simple construction. In this paper, according to the different mechanism in plugging reservoir fracture, temporary plugging agents were divided into four types which included particle type, fiber type, gel type and compound type. Furthermore, various temporary plugging agents were reviewed from the aspects of the temporary plugging mechanism, technical characteristics and application.