Affiliation:
1. 1Department of Chemical Engineering of Isfahan University of Technology
2. 2IOR Research Institute, National Iranian Oil Company (NIOC), Tehran, Iran
3. 3Society of Petroleum Engineering
Abstract
Abstract
In this paper, three dimensional modeling of steam injection in a fractured carbonate reservoir containing heavy-oil was performed. The paper describes a numerical Technique that simulates three-dimensional heat transfer and three-dimensional, three-phase fluid flow in a reservoir.This model considered both capillary and gravity effects in the energy equation and a variable porosity. First, steam injection process was modeled in a non-fractured reservoir, then, the model accuracy was assessed. The results showed that steam injection in a non-fractured reservoir increases the oil recovery to 70 %. In the next step, steam injection process was modeled in a fractured reservoir. The amount of oil recovery in this reservoir was estimated about 30 %.The sensitivity analysis for identification and evaluation of steam injection process in both non-fractured and fractured reservoirs was performed. The results indicated that some parameters such as: injection pressure, steam quality, pre-heating, permeability and location of fracture effect on the oil recovery. Oil recovery from carbonate fractured reservoirs is less compared with non-fractured reservoirs, and breakthrough occurs sooner.
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