中高含水期边底水砂岩油藏开采政策研究——以哈国Aryskum油田M-Ⅱ层北区为例

RESEARCH ON PRODUCTION POLICIES OF SANDSTONE RESERVOIRS WITH GAS CAPS, BOTTOM & EDGE WATER AT MID-TO-HIGH WATERCUT STAGES——TAKINGM-Ⅱ POSITION OF NORTH BLOCK OF ARYSKUM OILFIELD IN KAZAJGSTAN AS AN EXAMPLE

Aryskum油气田M-Ⅱ层为边底水砂岩油藏,其中北区采用边外注水,边底水水侵严重,目前处于中高含水阶段,产量递减大。为改善油田开发效果,通过油藏工程方法和数值模拟优化了注采井网和加密井位,确定了开采政策界限,并用流线数值模拟指导精细注水。

M-Ⅱ Horizon of North Block of Aryskum Oilfield is a sandstone reservoir with bottom /edge water,where severe bottom / edge water encroachment took place during water injection into aquifers in the Central North Block.At present the reservoir is in the mid-to-high watercut stage,with significant production decling.To improve the effectiveness of oilfield development,by using reservoir engineering methods and numerical simulation,the injection and production well patterns and infill wellsites have been optimized,the proper limits of production policies have been determined and accurate waterflooding can be guided by streamlined numerical simulation.