Numerical Simulation of Weak Gel Flooding for Fractured Reservoir Based on Fracture-matrix Coupling
ZHAO Dongfeng1, LIAO Xinwei1, WANG Shaoping2, YIN Dandan3, WANG Xiaoming4, YE Heng1
1. Key Laboratory of Petroleum Engineering, Ministry of Edncation, China University of Petroleum(Beijing), Beijing 102249, China;2. The 2nd Oil Production Plant, Changqing Oilfields, China National Petroleum Corporation, Qingyang 745100, Gansu Province, China;3. Research Institute of Enhanced Oil Recovery, China University of Petroleum (Beijing), Beijing 102249, China;4. Northeast Petroleum Pipelines Company, Shenyang 110031, China
Abstract:Due to the fact that the method of black oil model equivalent treatment fracture is unable to reflect the property of crack in the reservoir quite well, based on the theory of fracture-matrix coupling seepage, a 3D numerical model for oil-water two-phase fractured reservoir is established. By using the numerical model, the effect of different reservoir geology and development conditions on the weak gel modulation drive is researched, and the distinctiveness evaluation for the main influential factors is conducted, and the reservoir conditions for fractured reservoir appropriate flooding are put forward. By taking Jiangsu Oilfield as an example, the orthogonal analysis method is used to process the optimization design for real reservoir displacement parameters, the study results involving the utilization of weak gel modulation for fractured reservoir are able to improve recovery efficiency and have practical significance.