万荣晖

摘 要：萨南开发区油藏属普通稠油油藏，油层存在油层厚度小、连通状况差、层间矛盾大等特点。若采用笼统注聚，非主力油层受层间干扰的影响，吸聚量少，对油井见效晚，开发效果差。因此采用分层注聚技术，使聚合物驱注聚剖面得到有效改善，从而解决主力油层与非主力油层间吸聚量差异大的问题，实现层间合理配注，延长注聚区的有效期，进而提高阶段采收率。采用ECLIPSE软件模拟分层注聚，并给出分层聚驱措施优化，包括分层措施时机优化和分层注聚强度优化，使分层注聚效果达到最优。

关 键 词：稠油油藏；聚驱；分层注聚；措施优化

中图分类号：TE 122 文献标识码： A 文章编号： 1671-0460（2015）07-1531-03

Optimization of Separate-layer

Polymer Injection Measures for TypeⅡReservoirs

WAN Rong-hui

（Northeast Petroleum University， Heilongjiang Daqing 163000， China）

Abstract： Reservoir in Sanan development area is a common heavy oil reservoir； the reservoir has the characteristics of small reservoir thickness， poor connectivity， and big interlayer contradiction and so on. If using the general injection process， because the non-main layer is affected by interlayer interferenc， its absorbing polymer amount is less， so development effect is poor. The separate-layer polymer injection technology can improve the injection profile of polymer flooding， and solve the problem of large absorbing amount difference between main and non-main layers to achieve interlayer reasonable match injection and extend the period of validity of polymer injection region to improve the recovery rate. In this paper， ECLIPSE software was used to simulate the separate-layer polymer injection， and the measures to optimize the stratification of polymer flooding were put forward to achieve the optimal effect of separate-layer polymer injection， including hierarchical measure time and hierarchical injection strength optimization.

Key words： Heavy oil reservoir； Polymer flooding； Separate-layer polymer injection； Optimization measures

聚驅措施优化包括分层、解堵、压裂以及分微相注聚，本文将着重分析分层聚驱措施优化。同水驱采油一样，聚合物驱采油也存在层间矛盾，若采用笼统注聚开采方式，聚合物溶液将主要进入主力油层，因此会对油井见效早；而非主力油层，因受层间干扰的影响，吸聚量少，对油井见效晚，注聚开采效果差。分层注聚能有效改善注聚剖面，使聚合物溶液沿高渗层突进现象得到控制，并解决主力油层与非主力油层吸聚量差异大的问题，使非主力油层得到有效开发，实现层间合理配注，延长注聚区的有效期，可进一步提高采收率[1-5]。

1 试验区地质概况及开发现状

萨南开发区油藏属普通稠油油藏，油层表现为油层厚度小、连通状况差、层间矛盾大等特点。试验区控制面积0.24 km2，孔隙体积39.88×104 m3，地质储量18.77×104 t。……