莫北2井区侏罗系三工河组油藏数值模拟

准噶尔盆地莫北2井区侏罗系三工河组油藏为一典型的气顶油藏,气顶体积是油环的0.91倍。应用数值模拟方法，围绕确定气顶油藏的合理开发方式展开研究。在经过历史拟合修正地质模型的基础上,围绕三工河组油藏采用衰竭式开采、注水开发及注水方式、注采比、气顶开发等进行方案设计模拟。模拟结果表明，该油藏宜采用在油水界面内缘与油气界面外缘部署两排注水井注水开发,注采比保持在1.0,同时应在气顶布署一口平衡气井开发油环可获得较高的采出程度。

Numerical Simulation of Jurassic Sangonghe Reservoir in Mobei-2 Wellblock,Junggar Basin

The Jurassi c Sangonghe reservoir in Mobei-2Wellblock is a typical gas-cap pool where the g as cap volume is0.91times as big as its oil ring's.With the application of reservoir numerical simulation method,the rational development process for gas-cap pool is studied.The sim-ulation and design of various processes such as depletion drive,waterflooding,injection-withdrawal ratio and gas-cap product ion,etc.,are per-formed,based on modified geological model by production hi story matching of Sangonghe reservoir.The simulated results show that it is the most favorable to adopt waterflooding process that two rows of injection wel ls are arranged respectively in inner part of oil-water contact and out-er par t of oil-gas contact,and keep injection-withdrawal ratio of1.0;simultaneo usly,an equilibrium gas well to be drilled on the gas cap for oil ring developm ent is available to obtain higher recovery percent of reserves.