水驱砂岩油藏开发后期经济实用井网密度的确定

Determination of economical well spacing density for water-flooded sandstone reservoir at last stage

根据水驱砂岩油藏最终采收率与井网密度的关系式,利用将来净现值法计算油田的经济实用井网密度。该方法不仅考虑了投资、每年管理费用和原油销售收入的利息,而且综合考虑了老井在主开发期内的维修及管理费用、原油的税率、操作成本、产量递减等因素的影响,并应用公式对某一区块的经济实用井网密度进行了计算。

Based on an equation describing the relationship between the ultimate recovery and the well spacing density for water-flooded sandstone reservoir,the future net present value method is used to calculate the economical well spacing density for oilfield.This approach considers not only the interests of investment,overhead expenses per year and sale incomes of crude oil,but also synthetically the influence of maintenance and management cost for historical well in main development period,tax rate and operating expense of crude oil,production decline,etc.An example is presented to calculate the economical well spacing density by the equation.