物质平衡法在海上油田生产水回注研究中的应用

Application of Material Balance Method to Study on Reinjection of Produced Water in Offshore Oilfields

随着北部湾油田群规模的扩大及老油田的含水上升,需处理的生产水越来越多。为此,从油藏方面对生产水回注进行探讨,为海上油田生产水回注已开发油藏提供可行性依据,通过对物质平衡方程的推导,建立了回注目的储层累积亏空量(累积回注量)与地层压力的线性关系。结果表明WZ-A油田南块涠洲组在废弃后进行生产水回注可以满足北部湾油田群生产水回注的要求。

With the enlarging in the scale of field group and increasing in water cut in produced fluids from old oil fields in Beibuwan area, it is necessary to treat more and more produced water. In this paper, reinjection of produced water is discussed from the point of reservoirs in order to provide basis for reinjection of produced water into the old offshore oilfield. Derivated from material balance equation, the linear relationship between accumulative shortfall （accumulative reinjection） and formation pressure in the reinjected target reservoir has been established. The results show that reinjection of produced water into Weizhou Formation in southern block ofWZ-A Oilfield can meet the requirement for reinjection of produced water in Beibuwan Fields.