一种提高低渗透非均质多层油藏水驱储量动用程度的有效方法

An efficient method for increasing the reserves producing degree of heterogeneous multi-layer low-permeability reservoirs

提高低渗透非均质多层油藏水驱储量动用程度是高效开发此类油藏的主要措施方向.基于此类油藏存在启动压力梯度,每一层都有一极限注采井距的情况,充分考虑多层低渗油藏的纵向非均质性,建立了多层低渗油藏水驱储量动用程度计算模型,分析了影响纵向非均质多层低渗油藏水驱储量动用程度的因素,指出缩小井距和增大注采压差是提高其水驱储量动用程度的有效方法.方法简便、实用、易操作.

Increasing the reserves producing degree of heterogeneous multi-layer low-permeability reservoirs is the main measures to high efficiently develop this type of reservoirs.Based on the fact that there is the threshold pressure gradient and every layer has a limit injection-production well-spacing,a model for calculating the water-driving reserves producing degree of the heterogeneous multi-layer low-permeability reservoirs is established,and the factors influencing the reserves producing degree are analyzed.It is shown that decreasing the injection-production well spacing and increasing the injection-production pressure difference are the efficient methods to increase the water-driving reserves producing degree of heterogeneous multi-layer low-permeability reservoirs.This methods are simple and practical.