摘要
油井流入动态能够描述产量与井底流压之间的相互作用和影响。低渗透油藏储层物性差、孔喉半径细小,流体需克服启动压力梯度才能流动,且开采过程中储层变形会导致油井附近渗透率进一步降低从而影响产能,由此导致了低渗透油藏的流入动态十分复杂,常规理论流入动态方法不能很好地表征其IPR曲线形态。文章在综合考虑启动压力梯度、应力敏感性等低渗透油藏渗流特征的基础上,针对目标区块建立了适用于三种不同类型生产特征的油气水三相流入动态模型。研究结果表明,理论预测结果与矿场统计IPR曲线散点数据拟合良好,能够适用于不同类型井组各个生产阶段的流入动态拟合与预测。研究对低渗透油藏不同开发方式下油井流入动态预测具有一定指导意义。
Inflow performance of oil wells is used to describe the relationship between production and bottom hole pressure.In low permeability reservoir which has small porous media,the recent researches believe that fluid has to overcome the starting pressure gradient to flow.Besides,the deformation characteristics of rocks will lead to the permeability decrease and low production.Due to the complexity of inflow performance in low permeability reservoir,the conventional inflow performance theories can't accurately describe IPR curve.Based on problems above and considering starting pressure gradient and stress sensitivity,the multiple phase inflow models suited for different types of producing wells in target area were established and the inflow performance of well group XL and H75 was calculated,and the results showed that the theoretical prediction fits well with field IPR data,it was suited for the inflow performance matching and prediction of different types of well groups in different development process in low permeability reservoir.
出处
《钻采工艺》
CAS
北大核心
2014年第2期60-63,118,共4页
Drilling & Production Technology
基金
长江学者和创新团队发展计划资助(IRT1294)
关键词
流入动态
IPR
低渗油藏
压力敏感
inflow performance
IPR
low permeability reservoir
stress sensitivity
