中原油田开发后期改善注水井吸水剖面的途径探讨

Injection Profile Improvement in Late Production Period in Zhongyan Oilfield

油田进入特高含水阶段，由于储层的非均质影响，平面、层间及层内吸水状况极不平衡。如何改善注水井吸水剖面，提高注水波及系数，从而提高水驱采收率，是油田开发后期亟待解决的重大课题。文中认真分析了中原油田历年注水井吸水剖面变化趋势，并从理论和实践两个方面阐述了影响吸水剖面的主要因素，提出了改善注水吸水剖面的有效途径，为油田增产挖潜指明了方向。

In the development period with ultra -high water cut,water absorption in plane, interbeds and in -layers are sevearly unbalanced due to reservoir inhomogeneity.How to improve iulection profile,raise sweep effciency of iulected water and improve waterflood recovery factor,are the major problems that have to be settled urgently in late period of development. This paper analyzes the changing trend of injection profile over the years in Zhongyuan oilfield, discusses the main influential factors of injection profile both in theory and in practice, and presents the effective way of improving injection profile and the direction to further tap the production potential of the field.