坪北油田动态分析法剩余油描述

Description of Remaining Oil in Pingbei Oilfield by Means of Dynamic Analysis Method

坪北油田已进入高含水开发期,挖潜剩余油是目前及今后有效开发的重要方向。结合坪北油田实际,开展储层裂缝特征和注水开发见效见水特征研究,并利用矿场生产资料和动态监测资料对剩余油的成因进行了分析。分析认为平面剩余油分布受开发井网、储层物性和裂缝控制,剖面剩余油受射孔井段和纵向渗透性控制,建议在低渗透油藏部署井网排距时要充分考虑储层的渗透性,在注采井排建立有效驱替压力梯度,采取细分层的开发方式规避层间矛盾,提升开发效果。

Tapping the potential of remaining oil is an important task from now to the future for Pingbei Oilfield which has gone into high water cut development stage.This paper conducts a research on the characteristics of reservoir fracture and waterflood response in Pingbei Oilfield and analyzes the origine of remaining oil by using the oilfield production data and dynamic monitoring data.This paper believes that plane remaining oil distribution is controlled by well pattern,reservoir physical property and fracture and sectional remaining oil by perforation interval and longitudinal permeability.On this account,it suggests that reservoir permeability be taken into full consideration while deploying well pattern,that effective displacement pressure gradient be established in injection and production well array and that reservoir subdivision development mode be adopted to avoid conflicts between layers and promote development effect.