海上油田开发投资大、成本高、风险大,为获得较高的经济效益,有必要对不同开发方式进行组合和优化.根据以往水驱、聚合物驱、热力采油等经济技术界限研究成果,以原油黏度为一级决策、渗透率为二级决策、油藏深度为三级决策,建立了海上油田高效开发方式组合多级决策树,确定出适合海上油田高效开发的4大类26套组合模式;通过数值模拟方法得到了各种组合模式的采收率,结合经济评价优化确定了8套不同油藏条件的最优组合模式,并提出了各模式的生产动态典型特征曲线.绥中36-1油田实际区块应用结果表明,优化得到的高效开发组合模式具有较好的实用性,可以为海上油田开发模式优选提供借鉴.
It is necessary to combine and optimize different development modes for offshore oilfield in order to obtain high profit due to high development cost and risk.According to the previous research results of economic and technological limit for water flooding,polymer flooding,thermal recovery,taking oil viscosity,permeability and reservoir depth as the first,second and third level of decision-making,respectively,multilevel decision tree of efficient development method for offshore oilfield is established,and 26 sets of 4 kinds of combination modes are identified.The recovery factors of various combination modes are obtained by numerical simulation.Combined with economic evaluation,8 sets of different reservoir conditions are optimized and determined,and the modes of production dynamic type curves are put forward.The application in SZ36-1 oilfield shows that the optimized combination mode of efficient development has good practicability,and can provide reference for development mode optimization in offshore oilfield.