封堵封窜技术在孤东油田的应用

The Application of Plugging Off and Channelling Prevention Techniques in Gudong Oilfield

孤东油田是一个高渗透、河流相沉积的疏松砂岩油藏 ,经过多年的高速开发 ,采出程度较高 ,剩余油越来越少且分布零散 ,措施效果逐年下降。为了提高油田开发后期水驱油效率 ,挖掘层内、层间剩余油的潜力 ,控制含水上升速度 ,提高注水开发效果 ,1 998年以来 ,在深入开展油藏研究的基础上 ,充分应用PI决策和 RE决策技术 ,优化封堵方案和设计 ,同时开展封堵封窜技术研究和应用 。

Gudong oilfield is a loose sandstone reservoir of fluvial facies with high permeability With the rapid development for years,a ratio of tolal oil produced of OOIP is higher,remaining oil becomes less and less and its distribution is despersive and effect of stimulation decreases year after year In order to improve the efficiency of water driving in late time development of the oilfield, producing the potential remaining oil of inner layer and interlayer,controlling the increase rate of water cut and improving the effect of production by water injection,the techniques of pressure index and reservoir engineering decision have been fully used and plugging project and design have been optimized on the basis of reservoirs deeply studied.At the same time, the techniques of plugging off and channelling prevention are studied and used as well,by which better result is achieved for enhancing oil production and reducing water cut