五里湾D1油藏控制注水应用效果及评价

Application effect and evaluation of controlled water injection in Wuliwan D1 reservoir

靖安油田五里湾油藏以开发三叠系D1油藏为主,储层为湖成三角洲沉积,属于低渗透油藏,油藏平面、剖面非均质性较强。开发以注水为主,随着注入、采出程度的增大,油藏的平面单向突进、剖面上层内、层间矛盾日益突出,水驱油效率逐渐下降,从而影响着油田的稳产和开发效果。本文重点总结了D1油藏压裂试验区实施控制注水,降低注入强度,结合剖面综合治理取得的控水稳油效果,为后期整个D1油藏提高注水有效性,控制含水上升提供方向。

The Wuliwan oil reservoir in Jing'an oilfield is mainly developed for Triassic D1 oil reservoir.The reservoir is composed of lacustrine delta deposits.It is a low-permeability reservoir with strong heterogeneity in the plane and profile of the reservoir.Development is mainly based on water injection.As the degree of injection and production increases,the in-plane unidirectional penetration of the reservoir,the contradictions between the upper layers of the profile,and the layers have become increasingly prominent,and the water drive efficiency has gradually decreased,thus affecting the stable production and production of the oilfield development effect.This article focuses on the implementation of controlled water injection in the fracturing test area of the D1 reservoir,reducing the injection intensity,combined with the comprehensive management of the profile to achieve water control and oil stabilization,and provide directions for improving the effectiveness of water injection and controlling the rise of water cut in the entire D1 reservoir in the later period.