基于分层注水数学模型的油藏数值模拟

为模拟油田注水开发历史,提高分层动用状况及剩余油模拟结果的可靠程度,根据油田分层注水资料,分析水嘴的嘴损特性,建立考虑启动压差、水嘴直径等嘴损特性的分层注水数学模型,计算分层注水井各层段嘴前流压,实现嘴损方程与井—网格压力方程的耦合;考虑分层注水油藏数值模拟线性系统生成,实现井筒流动与井—油藏流动相耦合,提出分层注水油藏数值模拟方法,在PBRS(并行黑油模拟器)实现数值模拟功能.结果表明:模型能够反映分层注水开采开发效果,对缓解油田层间动用矛盾、改善注水开发效果具有指导意义.

Reservoir simulation model based on stratified water injection and its application

To improve hierarchical the disposable position and reliability of the simulation results of the remaining oil for accurate simulation of water flooding history,combined with the oilfield layered water injection data to analyze the characteristics of the faucets mouth loss,set up to consider starting differential pressure,water nozzle diameter and loss characteristics of the mouthstratified water injection numerical simulation model,layers paragraphs front of the mouth of the stratified injection wells flow pressure the mouth loss equation well-grid pressure equation coupled;consider layered the waterflood reservoir simulation linear system generates wellbore flow well-reservoir flow coupling stratified water injection reservoir simulation and stratified water injection analog functions in PBRS(parallel black oil simulator).The simulation results show that the model can reflect the role and development of mining stratified water injection effect,to alleviate the oilfield layer utilized contradiction between to improve waterflooding development effects.