中国石化不同类型断块油藏水驱采收率分析

以中国石化所属油田的中高渗稀油砂岩断块油藏452个开发单元为对象．从油藏开发角度，将断块油藏类型划分为天然能量开发的边底水断块油藏、注水开发的简单断块油藏、复杂断块油藏和极复杂断块油藏．分析不同类型断块油藏井网形式和水驱采收率的关系．回归出不同类型断块油藏采收率计算公式，分析了提高采收率的潜力，为断块油藏挖潜提供决策依据。图3参4

The water displacement recovery in different kinds of fault block sandstone reservoirs, Sinopec

The 452 development units of fault block sandstone reservoirs in Sinopec, which are characterized by medium-high permeability and ordinary viscosity, are subdivided into edge/bottom water fault block reservoirs driven by natural energy, simple fault block reservoirs, complicated fault block reservoir sand extra-complicated fault block reservoirs, all of latter three are water-driven. The relations between the water displacement recovery and well pattern of fault block reservoirs are analyzed. by which the formulae of oil recovery efficiency of different kinds of fault block reservoirs are regressed. The potential of EOR is analyzed. The study offers some reference for decision making of tagging remaining-oil.