注聚合物井压力响应特征分析  

Study on pressure response feature in polymer injection well

作　　者：刘新科[1] 程时清[1] 岳世俊[1] 

机构地区：[1]中国石油大学,北京102249

出　　处：《特种油气藏》2011年第1期76-78,139,共3页Special Oil & Gas Reservoirs

基　　金：国家"863"基金项目"海上油田化学驱油藏评价技术"(2008ZX05024-002-012)

摘　　要：考虑聚合物的浓度变化、吸附等物化机理及不同地层条件、工作制度等因素,建立相应的试井解释模型,用有限差分法对渗流方程进行数值求解,并绘制了相应的压力响应图版。研究表明:随着聚合物的浓度增加,压力和压力导数曲线上移;地层对聚合物吸附量增加,压力和压力导数曲线下移;在均质地层下,注纯聚合物和注入聚合物段塞相比,注纯聚合物在导数曲线后期上翘更加明显,且过渡段结束的时间要早;当注采井间存在高渗条带时,相对于均质地层,过渡段更加陡峭。A well test interpretation model has been established by taking into account polymer concentration and adsorption,different formation conditions and flow regime.The flow equations have been solved by using finite difference method,and the corresponding pressure response chart has been plotted.The study shows that as the increasing of polymer concentration,the curves of pressure and pressure derivative rise up;when polymer adsorption to the formation increases,the curves of pressure and pressure derivative drop down;in homogeneous formation,the later part of the derivative curve rises more obviously in the case of pure polymer injection compared to injecting polymer slug,and the transition section ends earlier;when there is a high permeability zone between injector and producer,the transition section appears steeper compared to homogeneous formation.

关 键 词：聚合物驱 段塞驱 试井 压力响应 数值求解 高渗透带 

分 类 号：TE345[石油与天然气工程—油气田开发工程]