Author(s)

Xiaolin Zhu, Zhiqiang Meng, Pingzhi Gong, Guanglong Li, Xinran Wang

Tianjin Branch of CNOOC (China) Limited, Tianjin, China.

In order to understand the water-flooding characteristics of different fracture systems in metamorphic rock buried hill reservoirs and the mechanism of improving water-flooding development effect, a three-dimensional physical model of fractured reservoirs is established according to the similarity criterion based on the prototype of metamorphic buried hill reservoirs in JZ Oilfield in Bohai Bay Basin. Combined with the fractured reservoir characteristics of JZ Oilfield, the water displacement characteristics of the top-bottom staggered injection-production well pattern in different fracture network mode and different fracture development degree of buried hill reservoir are studied. The experimental results show that: 1) the more serious the fracture system irregularity is, the shorter the water-free oil production period is and the lower the water-free oil recovery is. After water breakthrough of production wells, the water cut rises faster, and the effect of water flooding development is worse; 2) under the condition of non-uniform fracture development, the development effect of the bottom fracture undeveloped is better than that of the middle fracture undeveloped. Water injection wells are deployed in areas with relatively few fractures, while oil wells are deployed in fractured areas with higher oil recovery and better development effect.

Metamorphic Buried Hill Reservoir, Different Fracture Systems, 3D Physical Simulation, Water Flooding Characteristics

Zhu, X. , Meng, Z. , Gong, P. , Li, G. and Wang, X. (2020) 3D Physical Simulation of Water Flooding Characteristics of Buried Hill Reservoir with Different Fracture Systems. Journal of Power and Energy Engineering, 8, 1-13. doi: 10.4236/jpee.2020.85001.