针对低渗油田的超破裂压力注水法

Overpressure Water Injection for Low Permeability Oilfield

随着我国石油行业的发展,低渗油田的开发所占比重越来越大。低渗透地层致密,吸水能力差,采用传统注水方式很难驱油。传统的注水一般要求注入压力小于地层破裂压力。本文提出一种新的注水方式——超破裂压力注水,即通过注水压力大于地层破裂压力使地层破裂,提高渗透率、增大地层能量以提高低渗油田产量的技术,并对超破裂压力注水技术的原理进行阐述,确定了超破裂压力注水技术的适用范围。

With the development of China’s oil industry, the proportion of low permeability oilfield development is increasing. The low permeability formation is dense and has poor water absorption capacity, so it is difficult to drive oil by traditional water injection method. Traditional water injection generally requires that the injection pressure is less than the formation fracture pressure. In this paper, a new water injection method, super fracture pressure water injection, is put forward,which is a technology to improve the production of low permeability oilfield by increasing the permeability and formation energy by making the formation fracture when the water injection pressure is greater than the formation fracture pressure. The principle of super fracture pressure water injection technology is described, and the application scope of super fracture pressure water injection technology is determined.