不同类型前置段塞聚合物浓度对驱油效果影响研究

摘要

This article depend on the simulation of ASP slug flooding conditions in Lamadian area of Daqing oil field. By changing the polymer concentration in the polymer pre-slug and the polymer/surfac-tant pre-slug,the effect of the pre-slug with different polymer concentration on the slug ensemble ASP flooding efficiency are studied by laboratory physical simulation experiment. The results show that for the same type pre-slug, the higher of the polymer concentration in the pre-slug, the higher of the efficiency of the ternary system and the lower of the water cut of the outlet. The P/S pre-slug is better than the polymer pre-slug in the flooding efficiency.%针对大庆油田喇嘛甸区块的三元复合驱多段塞注入开发现状,进行了室内物理模拟实验.通过改变一元(聚合物)、二元(聚合物+表面活性剂)两种不同类型前置段塞中聚合物浓度,研究了不同前置段塞对多段塞注入三元复合驱整体驱油效果的影响.结果表明,随着前置段塞中聚合物浓度增加,化学驱提高采收率幅度越大,出口端最低含水率逐渐降低;聚表二元前置段塞对采收率的提高程度优于单一聚合物前置段塞.