摘要
为了合理地开发外围低渗透油气田,建立有效驱动体系,提供可借鉴的实验分析和渗流解释,通过室内实验研究分析了低渗透储层岩样在单相油驱、两相水驱油以及气驱油条件下的启动压力特征;系统地研究和评述了大庆外围油田油水、油气两相流体渗流特征,利用STONE标准化概率模型预测了低渗透储层油、气、水三相共存时油相渗流变化特点和规律。结果表明,对于低渗透岩样,无论是单相还是两相驱替实验都存在着启动压力,两相流体渗流启动压力大干单相流动时启动压力,三相流动时要比两相渗流阻力大,任意两相渗流系统的共渗透范围均大于三相渗流时共渗透范围,在低渗透油气田开发时应避免三相流动的发生。
In order to develop reasonably low permeability oil-gas fields in Daqing peripheral area and establish the effective driving system to provide useful experimental analysis and seepage interpretation, laboratory researches on the start up pressure gradient of low permeable core sample under the conditions of mono-phase oil flow, two-phase fluids of oil/water and of oil/gas have been car ried out. The characteristics of two phase fluids of oil/water and oil/gas in Daqing peripheral low permeability oilfields have been systematically analyzed. By means of STONE probability model, variable characteristics and rules for oil phase seepage in the coexistence of water/oil/gas in low permeability reservoirs have been predicted. Results indicate that whenever in mono-phase or in two- phase driving experiments, there always is a start-up pressure gradient for low permeable rock sample. The start-up pressure gradient in two-phase flow is larger than that of mono-phase. Three-phase seepage resistance is larger than that of two phase and syngenesis flow range of two-phase flow is larger than that of three-phase, so three-phase flows should be avoided during development of low permeability oilfield.
出处
《石油学报》
EI
CAS
CSCD
北大核心
2006年第B12期124-128,共5页
Acta Petrolei Sinica
基金
中国石油天然气股份有限公司科技攻关项目(030127)部分研究成果。
关键词
低渗透
启动压力梯度
相对渗透率
STONE概率模型
水驱油
三相相对渗透率
low permeability
start-up pressure gradient
relative permeability
STONE probability model
water flooding experiment three-phase relative permeability
