Physical Simulation of Cold Recovery of Edge Water Heavy Oil Reservoir After Steam Stimulation

doi:10.11885/j.issn.1674-5086.2019.04.15.01

Abstract

Abstract: Aiming at limited effect of thermal recovery of the edge water heavy oil reservoir with, the development method of cold recovery after steam stimulation is put forward. The physical simulation experiment of heavy oil reservoir with edge water is carried out by using the high temperature and high pressure three-dimensional physical simulation system. The temperature field of the steam stimulation process under the influence of the edge water and the production dynamic characteristics before and after the chemical cold recovery are studied. The results show that in the process of steam huff and puff development of heavy oil reservoir with edge-water, the heating range of oil layer is asymmetric due to the influence of edge-water intrusion. With the increase of steam stimulation cycle, the heating range of the oil layer near the edge water is obviously shrinking, and the water channel is gradually formed, which makes the oil layer in the vicinity of the water intrusion area deteriorate. There is a mutual influence and restriction between the heating range of oil layer and the intrusion of edge-water. Viscosity reducer plays the role of emulsifying, reducing viscosity and weakening water invasion. Combined with the law of water penetration and rational utilization of edge-water energy, the recovery rate can be increased by 34% by transforming steam stimulation into cold production. At the same time, the range of reservoir suitable for this technique is determined by numerical simulation. The results of this study can be used for reference in the development of heavy oil reservoirs with edge water.

Key words: heavy oil, steam stimulation, chemical cold recovery, edge water, physical simulation

CLC Number:

TE345

WANG Yanwei, LIU Huiqing, DONG Xiaohu, ZHANG Qichen. Physical Simulation of Cold Recovery of Edge Water Heavy Oil Reservoir After Steam Stimulation[J]. 西南石油大学学报(自然科学版), 2020, 42(1): 91-100.

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