海上油田稀井网大井距聚合物驱应用与分析

为改善海上X油田产量递减现状,在室内评价及小井组试验的基础上,进行了中高含水期的早期聚合物驱矿场试验,提出了海上油田注入井分层分质注入、分层调剖,油井提液引效的措施。研究表明,稀井网大井距聚合物驱主要以扩大平面波及体积为主;从边部油井的见效特征分析可知,聚合物注入可有效压制边水入侵,但对改善纵向层间矛盾效果有限。X油田早期聚合物驱试验为海上同类油田的开发提供了重要参考依据。

Polymer flooding practice and analysis for offshore oilfield with large well spacing

The offshore X oilfield has shown production decline and medium-high water cut,so that polymer flooding field test is conducted based on laboratory evaluation and small well group test.Proposed measures for the offshore oilfield include separate injection,separate zone profile control and pump-induced lifting.Researches indicate that polymer flooding with large well spacing can expand swept volume;the responses in edge oil wells show that polymer injection can effectively control edge water invasion,but has little effect to mitigating vertical interlayer interference.The polymer flooding practice in the X oilfield offers important reference for development of analogous offshore oilfields.