Arps递减规律下的优化注水

Optimal Injection Allocation for Regular Pattern of Arps Decline

优化配注是油田高产、稳产的保证,而油田的整体优化配注工作一直是一个难题。从Arps递减规律出发,并结合累积产油量与累积注水量呈半对数、双对数线性关系,推导了注水量与产油量、累积产油量的关系和3种递减规律下的配注公式,并建立了3种递减规律下的优化配注方法。最后,通过实例分析说明应用效果较好,对油田递减后期优化注水工作有较好的指导意义。

Optimal injection allocation is the guarantee of high and stable production, but it is challenging work all the time for oilfield. This paper begins with the regular pattern of Arps decline and combines cumulative oil production with cumulative water injection, which shows linear relationship of semi-logarithm and double logarithm, and deduces relationship among water injection, oil production and cumu- lative oil production as well as formulae according to regular pattern of Arps decline, and builds up three methods for optimal injection allo- cation for the regular pattern. Finally, the case study indicates that the deduced method is reliable, being as a guide for water injection allo- cation of decline period of oilfield.