摘要
大庆油田萨中开发区目前处于特高含水期开发阶段,近几年地层压力逐渐降低,油层脱气严重,开采难度加大,影响油田稳产,因此需要明确在保持产量前提下的合理地层压力界限。利用油藏工程理论、数值模拟等研究手段,结合室内试验及国内外同类型油田矿场资料分析,综合确定了采收率最大原则下的合理地层压力,即保持在饱和压力附近,同时考虑油田产量需求,确定了萨中开发区合理地层压力界限为10.1MPa,并确定了在最大注水能力下采液量不变时地层压力合理恢复速度。该方法可为特高含水各开发区制定不同的调整对策及挖潜方法提供一定的指导意义。
The Central Development Area in Daqing Oilfield has been currently at the extra-high water-cut stage.The formation pressure has been gradually reduced in recent years with serious reservoir degassing and arduous exploitation,which influenced the stable production.Therefore,the reasonable formation pressure limits should be determined under the condition of stable yield.The reservoir engineering theory,numerical simulation and other research methods were used,combined with laboratory experiment and the analysis on the field data both from internal and external oilfields of the same type the reasonable formation pressure under the principle of maximum oil recovery factor was determined synthetically,which was kept closed to the saturation pressure.At the same time,the needs of oilfield production was taken into consideration,reasonable formation pressure limit in Development Area of Central Sa'ertu Oilfield was determined to be 10.1MPa.The reasonable recovery rate of formation pressure was determined as fluid production remained unchanged under the condition of maximum water injection capacity.This method can provide guidance for taking adjustment measures and tapping the potential with different methods in the oilfields at high water-cut stage.
出处
《长江大学学报（自科版）（中旬）》
2016年第12期53-56,共4页
Journal of Yangtze University(Nature Science Edition)
基金
国家科技重大专项(2011ZX05010-002
2011ZX05052)
中国石油天然气股份有限公司重大科技项目(2011E1205)
关键词
特高含水期
水驱油藏
地层压力
采收率
井底流压
extra-high water-cut stage
water flooding reservoir
reservoir pressure
recovery rate
bottom-hole flowing pressure
