摘要
低渗油藏存在启动压力梯度,严重影响了油藏开发效果,启动压力梯度越大,则储层动用程度越差。依据低渗透油藏流体渗流机理,采用单相渗流的生产动态数据及试井解释资料,利用试井方法求得研究区的启动压力梯度,并建立启动压力梯度与渗透率的相应关系。分析了典型反九点井组的注水井与边井及角井井间的驱动压力梯度变化特点,若得到注采排距过大,则在注采连线中点处的驱动压力梯度有可能小于启动压力梯度,在非主流线上驱动压力梯度就更小,从而导致无法建立有效的驱替系统,影响井间储量的动用。该方法采用定量分析低渗透油藏井间储量动用情况,为同类油藏确定井间剩余油分布及合理的井距提供了参考。
The presence of low permeability reservoirs and pressure gradient, seriously affect the development effects on reservoir, starting pressure gradient greater the reservoir extent the worse. The percolation mechanism based on the low- permeability reservoir fluid using the site bound water under the conditions of single-phase flow in the production of dynamic data and well test interpretation data, use of well test method and experience formula method, get the relationship between the start-up pressure gradient and permeability relationship of the study area, analysis of a typical well group pressure driven between the injection wells and side wells and angle wells gradient features, if get the injection-production row spacing is too large, the midpoint in injection-production cords of driving pressure gradient is less than start-up pressure gradient, likely in the mainstream line driving pressure gradient is smaller, leading to unable to establish an effective displacement system, af- fect the using cross-hole reserves. The method adopts the quantitative analysis of low permeability reservoir inter-well re- serves producing situation, for similar reservoir inter-well remaining oil distribution and reasonable well spacing provides ref- erence.
出处
《物探化探计算技术》
CAS
CSCD
2013年第5期605-609,共5页
Computing Techniques For Geophysical and Geochemical Exploration
关键词
低渗透油藏
启动压力梯度
试井方法
剩余油
合理井距
low permeability reservoir
start-up pressure gradient
well test methods
remain oil
reasonable well spac
