Practice and Understanding of Separate-Layer Polymer Injection in Daqing Oil Field
- Yaning Liang (MOE Key Laboratory of Production Engineering in China University of Petroleum) | Shicheng Zhang (MOE Key Laboratory of Production Engineering in China University of Petroleum) | Xiaohan Pei (Research Institute of Petroleum Exploration & Development, PetroChina) | Hong Duan (Daqing Oilfield Company Limited, PetroChina)
- Document ID
- Society of Petroleum Engineers
- SPE Production & Operations
- Publication Date
- August 2011
- Document Type
- Journal Paper
- 224 - 228
- 2011. Society of Petroleum Engineers
- 5.4.7 Chemical Flooding Methods (e.g., Polymer, Solvent, Nitrogen, Immiscible CO2, Surfactant, Vapex), 4.1.2 Separation and Treating, 4.1.5 Processing Equipment
- production engineering
- 5 in the last 30 days
- 714 since 2007
- Show more detail
- View rights & permissions
|SPE Member Price:||USD 12.00|
|SPE Non-Member Price:||USD 35.00|
Daqing oil field is one of the earliest to develop displacement technology by polyacrylamide (HPAM). One tonne of polymer can increase 100 to 120 tonnes of oil; the recovery increases from 40% (OOIP) to 50% (OOIP). In view of the geological and physicochemical characteristics, a series of technologies have been developed, such as polymer-flooding mechanism, productivity forecasting, proposal optimization, domestic excellent-quality polymer production, surface injection, downhole separate-layer injection, and separate-layer testing during injection. The oil field is characterized as a heterogeneous multilayer sandstone reservoir. During polymer flooding, separate-layer injection technology is also needed to mitigate the interlayer differences, enhance oil recovery, and improve the whole development effect.
After polymer flooding in main oil layers, polymer flooding in Daqing oil field turned to lower-permeability layers. To obtain a better displacement effect, the injected-polymer molecular weight is usually determined according to the injectivity of high-permeability layers. However, if polymer solution with the same molecular weight is injected in each layer, it will cause blockage in low-permeability layers. In order to solve this problem, a new technology is developed that can control both separate-layer polymer molecular weight and injection rate; the injection profile was improved greatly in later field applications.
This paper introduces the development and practice of separate-layer polymer-injection technologies, and presents the principle, string structure, and parameters of eccentric different-molecular-weight polymer-injection technology and its field applications in Daqing oil field.
|File Size||460 KB||Number of Pages||5|
Chen, P., Shao, Z. and Liu, Y. 2005. Determination Method for RelativePolymer Molecular Weight in Medium and Low Permeability Layers. PetroleumGeology & Oilfield Development in Daqing 24 (3):95-96.
Cui, H. 1995. Engineering Fluid Mechanics. Beijing: PetroleumIndustry Press.
De Bons, F.E. and Braun, R.W. 1995. Polymer Flooding: Still a Viable IORTechnique. Proc., 8th European IOR Symposium, Vienna, Austria, 15-17May, 1995, 57-66.
Du, Y. and Guan, L. 2004. Field-scale Polymer Flooding: Lessons Learned andExperiences Gained During Past 40 Years. Paper SPE 91787 presented at the SPEInternational Petroleum Conference in Mexico, Puebla Pue, Mexico, 7-9 November.doi: 10.2118/91787-MS.
Gaillard, N., Giovannetti, B., and Favero, C. 2010. Improved Oil RecoveryUsing Thermally and Chemically Protected Compositions Based on co- andter-polymers Containing Acrylamide. Paper SPE 129756 presented at the SPEImproved Oil Recovery Symposium, Tulsa, 24-28 April. doi: 10.2118/129756-MS.
Heemskerk, J., Rosmalen, R.J., Janssen-van, R., Hotslag, R.J., and Teeuw, D.1984. Quantification of Viscoelastic Effects of Polyacrylamide Solutions. PaperSPE 12652 presented at the SPE/DOE Enhanced Oil Recovery Symposium, Tulsa,15-18 April. doi:10.2118/12652-MS.
Hu, B., Liu, H., and Li, L. 1997. Production Engineering in PolymerFlooding. Beijing: Petroleum Industry Press.
Jiang, Y., Cheng, Y., Yuan, F., and Zhu, Y. 2001. Research on separate zonepolymer flooding. Petroleum Geology and Recovery Efficiency 8 (6): 65-67.
Jin, Y. 1985. Oilfield Separate Layer Production. Beijing: PetroleumIndustry Press.
Kaminsky, R.D., Wattenbarger, R.C., Szafranski, R.C., and Coutee, A.S. 2007.Guidelines for Polymer Flooding Evaluation and Development. Paper IPTC 11200presented at the International Petroleum Technology Conference, Dubai, 4-6December. doi:10.2523/11200-MS.
Littman, W. 1988. Polymer Flooding, No. 24. Amsterdam, TheNetherlands: Developments in Petroleum Science, Elsevier Science PublishersB.V.
Qi, L. 1998. Study on Numerical Simulation of Polymer FloodingEngineering. Beijing: Petroleum Industry Press.
Seright, R.S., Seheult, M., Kelco, C.P., and Talashek, T. 2009. InjectivityCharacteristics of EOR Polymers. SPE Res Eval & Eng 12(5): 783-792. SPE-115142-PA. doi:10.2118/115142-PA.
Shao, Z., Fu, T., and Wang, D. 2001. The Determination Method for ReasonablePolymer Volume. Petroleum Geology & Oilfield Development in Daqing 20 (2): 60-62.
Sorbie, K.S. 1991. Polymer-Improved Oil Recovery. Glasgow, Scotland:Blackie & Sons.
Xu, Z., Wang, D., Chen, F., and Hao, Y. 2001. Evaluation on the Potential ofPolymer Flooding. Petroleum Geology & Oilfield Development in Daqing20.