南断阶低渗透油藏有效开发技术经济界限研究

Study on technical and economic limits of effective development for low-permeable reservoirs in south fault terrace

应用盈亏平衡分析理论,研究建立了油藏有效开发的技术经济界限模型和系列图版,并结合南断阶油藏低渗-特低渗的特点,分析研究了南断界油藏在不同储量规模、油藏埋深、油价、操作成本、稳产期、递减率等条件下,油藏的单井初始日产油界限、增储界限以及注水开发油价界限;然后在该地区储层综合评价研究结果的基础上,对该地区投入注水开发的物性下限进行了分析研究,并结合主流喉道半径、可动流体饱和度、启动压力梯度3个主要参数,综合确定了该地区投入注水开发的物性下限。

A technical and economic limit model of effective development for low - permeable reservoirs was estab- lished by break - even analysis. Limits of initial oil - production per day, increasing production and oil price of water flooding were studied under different conditions such as reserve scales, reservoir depth, oil prices, operation cost, stable produc- tion periods and decline rates, and so on. On the basis of previous comprehensive evaluation results, the lower limit of physical property for water flooding was determined by considering three main parameters of throat radius, movable fluid satura- tion and starting pressure gradient.