高渗透油层端部脱砂压裂技术研究

STUDY ON TIP SCREENOUT FRACTURING TREATMENT IN HIGH PERMEABILITY RESERVOIR

端部脱砂是一种能够在一定程度上控制缝长的特殊压裂技术,广泛运用于高渗透地层压裂改造。从理论到应用系统地介绍了高渗透油层端部脱砂压裂的脱砂过程、脱砂机理、裂缝的防砂机理,并给出了端部脱砂压裂滤失和裂缝数学模型及其求解方法,最后用实例说明该工艺的增产效果,并对工艺的实施提出了要求和建议。

Tip screenout is a particular fracturing treatment which can control fracture length to a certain extent. It is widely applied in high permeability reservoir. This paper describes the process and mechanism of tip screenout fracturing in high permeability reservoir, explains the sand prevention mechanism of fracture. In addition to those , this paper also give the mathematics models and solutions of fracture extending before and after tip screenout. At last, the paper illuminates the effective of this technique by examples and propose some requiremerts and suggestion for the technology.