王场油田王广区周期注水矿场试验效果的认识

On understanding of cyclic waterflooding pilot testing effect in Wangguang Area of Wangchang Oilfield

王场油田王广区为薄层低渗透砂岩岩性油藏。1971年投入试采,采用不规则大井距面积井网开发。根据油田动态反映,1998年对主力油层进行注采系统调整,加密完善井网,提高了采油速度,但油井含水上升较快。为了进一步降水采油,改善注水开发效果,对部分注采井组进行了周期注水矿场试验,见到良好效果。

Wangguang Area of Wangchang Oilfield is a lithologic sandstone reservoir with low permeability and thin layers. In 1971,it was brought into production test and utilized irregular dispersed well pattern of wide spacing for exploitation. Based on oilfield performance reactions,we adjusted some injection-production systems of main oil layers in 1998,infilled and perfected some well patterns,then oil recovery rate was improved,but water cut of oil well increased quickly. In order to reduce water cut and increase oil production further,to improve water drive development effect,cyclic waterflooding pilot testing have been adopted in some well patterns of this area,and good effects have been gained.