海上稠油油田井网密度与采收率关系研究

海上油田开发的核心目标是在平台寿命期内实现最大经济采收率,需要尽早确定合理的井网密度。在借鉴中国石油勘探开发研究院根据中国144个油田或开发单元的资料回归的井网密度与采收率关系式基础上,考虑稠油水驱规律及特点,对前述关系式的驱油效率项进行了校正,进而形成了适合海上稠油油田特点的井网密度与采收率关系式。海上稠油油田验证结果表明,校正后的井网密度与采收率关系式能够准确描述不同井网加密阶段的标定水驱采收率的变化趋势。

A research on the relationship between well pattern density and recovery factor in offshore heavy oilfields

For the development of offshore oilfields,its core goal should be to achieve the maximum economic recovery factor during the life of an offshore platform,and it is required to determine the reasonable well pattern density.A regression expression of the relationship between pattern density and recovery factor was found for the data from 144 oilfields or developing units by Exploration and Production Research Institute,CNPC.The term of oil displacement efficiency in this regression expression,however,was revised by considering water drive behavoirs of heavy oil,thus resulting in a new expression of the relationship between pattern density and recovery factor for offshore heavy oilfields.Its application in some offshore heavy oilfields has demonstrated that the new expression can exactly describe the changes of the nominal water-drive recovery factor at different development stages of the oilfields.