三维三相渗流数模在提高非均质油藏注水开发采收率中的应用

THE APPLICATION OF NUMERICAL SIMULATION OF THE 3-D AND 3-PHASE PERCOLATIONON INCREASING THE RECOVERY FACTOR OF HETEROGENEOUS WATER DRIVING RESERVOIR

强非均质油藏注水开发过程中随着水洗程度的加深,高渗层水淹严重,低渗层无法动用或动用程度较低,油层平面及纵向动用差异日益增大,严重影响注水开发效果.以强非均质油藏板9断块为例,针对油藏本身的流体特性及注水开发特点,从油、气、水三相渗流达西运动方程和物质守恒角度出发,建立了该断块油藏三维三相渗流数学模型,优化设计合理的网格系统以及算法组合对该断块进行了数值模拟研究,准确描述剩余潜力分布,有针对性的提出综合治理措施,使开发效果得到明显改善,为同类断块油藏的开发提供指导和借鉴.

Along with the water washing deepened in the process of water-driving development of severe heterogeneous reservoir, high permeable layers are severely flooded, but low permeable layers can not or poorly be developed, so the differences of reservoir development on plane and vertical direction are enlarged daily, and the water-flooded results are seriously affected. Taking Ban9 reservoir (a complex fault-block reservoir with strong heterogeneity) for example, the 3-D and 3-phase percolation mathematical model of Ban9 reservoir, which the fluid properties of reservoir itself and the water driving characteristics of heterogeneous reservoir are taken into consideration and oil, gas, water three-phase Darcy motion equation and material conservation theory are applied, is given. At the same time, the optimized and designed rational grid system and algorithm assembly are applied in the fine reservoir numerical simulation study of Ban9 reservoir, and the residual oil distribution is accurately described, what's more, the pertinence comprehension managing measures are put forward, and the better results are obtained. The developing guideline and basis are given for the same type fault-block reservoir.