大庆长垣外围特低渗油藏开发及治理分类评价

CLASSIFICATION AND EVALUATION OF THE DEVELOPMENT AND TREATMENT FOR THE ULTRA-LOW PERMEABILITY OIL RESERVOIRS AROUND DAQING PLACANTICLINE

大庆长垣外围特低渗透油藏开发已进入中含水阶段,含水上升速度快。为达到稳油控水的目的,基于长垣外围特低渗透油藏分类结果,建立了分类标准,完善了特低渗透油藏水驱开发效果综合评价方法。通过对开发指标、注采系统、压力系统、动用状况和管理指标5大系统进行效果评价,找出了同类油藏中各区块开发效果的差异。应用对标方法,找差距、找问题、找潜力、定对策。结果表明:经过4年的治理,共有6个特低渗透区块实现了档次提升。

The ultra-low permeability oil reservoirs around Daqing Placanticline have entered into the middle watercut stage,the rise speed of the water cut is rather rapid. In order to achieve the purposes of keeping the oil production stable and controlling the watercut,on the basis of the classified results of the reservoirs around the Placanticline,the classifying standards were established,and the comprehensive evaluating method was improved for the water flooding development effects of the ultra-low permeability reservoirs. Through the effect evaluations on the following 5 large systems,such as the development index,injection-production system,pressure system,developed status and management index,the development effect differences between each blocks of the same kind of the oil reservoir were found out. Finally,the benchmarking methods were applied to find out the gap,the problem and the potential,and then set the countermeasure. The results show that after 4-year treatment,a total of 6 ultra-low permeability blocks have achieved the level upgrade.