复杂断块小气顶油藏注水试验研究及合理注入量确定

RESEARCH ON WATER INJECTION TEST FOR COMPLEX FAULT BLOCK SMALL GAS CAP RESERVOIR AND DETERMINATION OF REASONABLE INJECTION RATE

衰竭式开发的小气顶油藏由于天然能量不足,随着开发生产的进行,油井产量下降快,整体采出程度低,开发效果不理想。ZSG油田Z3断块地层压力保持水平低,油井大多间开低液生产,有必要开展注水试验,优选合理注采井网,鉴于地下亏空大,采用弥补地下亏空和采出孔隙体积两种算法优化合理注入量,注采试验区块现场实施表明,注水后油井产量上升,增油见到明显效果,注水试验区块的成功对ZSG油田全面实施注水开发具有一定的指导意义。

Due to shortage of natural energy about depletion development small gas cap reservoir. As the developing of the production, the well production decreases fast, reservoir recovery rate is low, which results in worsedevelopment effect. Most wells intermittent produce with low liquid due to low reservoir pressure level. It is necessary to start water injection test by analyzing production features of Z3 block in ZSG oil filed. After choosing reasonable injection-production pattern, reasonable injection is optimized by means of covering underground deficit and produced pore volume. The field applications show that oil production increased is obvious. The successof the water injection test block has a certain guiding significance to waterflood development for ZSG oil field.