폴리머 공법에 의한 유동도 제어 프로세스의 수치 시뮬레이션
Numerical Simulation of Mobility Control Process by Polymer Flooding
0
조회
0
다운로드
6
인용
0
참고문헌
키워드
초록
Injection of polymer solutions has been recognized as an effective mobility control process to increase the recovery of oil in mature fields. Polymer flooding is a way to reach the residual oil saturation more quickly or allow it to be reached economically. Evaluating whether a polymer flood is suitable for a given field and developing the optimal design, a considerable analysis using extensive numerical simulations is required prior to full-scale implementation. This paper presents numerical investigations of a two-well model in a five-spot pattern operating under polymer flood process. UTCHEM, a three-dimensional numerical model for fluid flow and mass transport, is used to analyze the performance of the reservoir. The model includes the effects of polymer concentration-dependent viscosities, shear-thinning rheology of the polymer solution, and inaccessible pore volume. This paper places an emphasis on the design and reservoir parameters including slug design, oil viscosity, and absolute permeability. For different parameters of the system, performances were compared in terms of cumulative oil recovery and water-oil ratio at the production well and pressure drop at the injection well. Results of numerical calculations indicate that properties of polymer bank such as concentration and size are shown to impact the predicted recovery. The results also show the effectiveness of using a buffer zone of grading polymer concentration to lessen the unfavorable mobility ratio between the chase water and the polymer solution. It is noted that although an increased recovery is obtained with a lower permeability, the significant increase in the amount of pressure drop at the injection well makes the application impractical.
Abstract
Injection of polymer solutions has been recognized as an effective mobility control process to increase the recovery of oil in mature fields. Polymer flooding is a way to reach the residual oil saturation more quickly or allow it to be reached economically. Evaluating whether a polymer flood is suitable for a given field and developing the optimal design, a considerable analysis using extensive numerical simulations is required prior to full-scale implementation. This paper presents numerical investigations of a two-well model in a five-spot pattern operating under polymer flood process. UTCHEM, a three-dimensional numerical model for fluid flow and mass transport, is used to analyze the performance of the reservoir. The model includes the effects of polymer concentration-dependent viscosities, shear-thinning rheology of the polymer solution, and inaccessible pore volume. This paper places an emphasis on the design and reservoir parameters including slug design, oil viscosity, and absolute permeability. For different parameters of the system, performances were compared in terms of cumulative oil recovery and water-oil ratio at the production well and pressure drop at the injection well. Results of numerical calculations indicate that properties of polymer bank such as concentration and size are shown to impact the predicted recovery. The results also show the effectiveness of using a buffer zone of grading polymer concentration to lessen the unfavorable mobility ratio between the chase water and the polymer solution. It is noted that although an increased recovery is obtained with a lower permeability, the significant increase in the amount of pressure drop at the injection well makes the application impractical.
참고문헌 (14)
- Anderson, G.A., "Simulation of Chemical Flood Enhanced Oil Recovery Processes Including the Effects of Reservoir Wettability, M.S. Thesis, U. of Texas at Austin, Austin, TX", ~
- Center for Petroleum and Geosystems Engineering, "UTCHEM-9.0 A Three-Dimensional Chemical Flood Simulator, U. of Texas at Austin, Austin, TX", ~ (2000)
- Delshad, M., "A Compositional Simulator for Modeling Surfactant Enhanced Aquifer Remediation, 1 Formulation", J. of Contaminant Hydrology, 23, pp.303~327 (1996)
- Giavedoni, M.D., "Directional Modelling of Oil Recovery through Polymer Flooding" (1986), unsolicited paper
- Green, D.W., "Enhanced Oil Recovery, Soc. Pet. Eng., Richardson, TX", ~ (1998)
- Kaminsky, R.D., "Guidelines for Polymer Flooding Evaluation and Development", pp.4~6 (2007), paper presented at the International Petroleum Technology Conference
- Needham, R.B., "Polymer Flooding Review", J. of Petroleum Tech, pp.1503~1507 (1987)
- Takaqi, S., "Simulation of a Successful Polymer Flood in the Chateaurenard Field", pp.4~7 (1992), paper presented at the SPE Annual Technical Conference and Exhibition
- Wang, M., "Laboratory Investigation of Factors Affecting Residual Oil Saturation by Polymer Flooding", 석사, pp.1995
- Wang, D., "Producing by Polymer Flooding More Than 300 Million Barrels of Oil, What Experiences Have Been Learnt?", pp.8~10 (2002), paper presented at the SPE Asia Pacific Oil and Gas Conference and Exhibition
- Wang, D., "Key Aspects of Project Design for Polymer Flooding", pp.11~14 (2007), paper presented at the SPE Annual Technical Conference and Exhibition
- Wang, Y., "Commercial Success of Polymer Flooding in Daqing Oilfield-Lessons Learned", pp.11~13 (2006), paper presented at the SPE Asia Pacific Oil and Gas Conference and Exhibition
- Yang, F., "High Concentration Polymer Flooding Is Successful", pp.18~20 (2004), paper presented at the SPE Asia Pacific Oil and Gas Conference and Exhibition
- Yang, F., "Study on High-Concentration Polymer Flooding to Further Enhance Oil Recovery", pp.24~27 (2006), paper presented at the SPE Annual Technical Conference and Exhibition