深水油田高饱和油藏能量合理补充时机研究

Reasonable opportune moment of energy supplement of high saturation reservoirs in deepwater oilfield

基于深水油田高饱和油藏条件与开发要求,分析衰竭开发阶段储层流体不稳定渗流过程,采用稳定逐次逼近法研究储层中压力分布特点,以及衰竭开发的不同阶段储层弹性产出量的变化规律,提出不同条件下能量极限补充时机和有效补充时机,建立可满足开发要求的能量合理补充时机的计算方法.结合深水油田实际,研究不同条件下深水油田高饱和油藏能量补充时机的变化规律,根据油田流体性质和开发要求,确定一定条件下油藏能量的合理补充时机.

Based on the conditions and development requirements of high saturation reservoirs in deepwater oilfield and analyzing the unsteady flow of reservoir fluids under depletion development, the method of steady-state successive ap- proach to unsteady-state solution is adopted to analyze the distribution characteristics of pressure in reservoirs and variation of elastic production in different stages of depletion development. The limit and effective opportune moments of energy supplement are put forward. The calculation method is derived from reasonable opportune moment of energy supplement satisfying the development requirements of high saturation reservoirs in deepwater oilfield. Combined with first-hand observation of deepwater oilfields, the opportune moment of energy supplement in deepwater oilfield is studied with high saturation reservoirs and different conditions. The reasonable opportune moment of energy supplement in certain conditions is determined on the basis of fluid property and development requirements of such oilfields.