An Efficient Downhole Oil/Water-Separation System with Sucker-Rod Pump
- Minzheng Jiang (Northeast Petroleum University) | Tiancai Cheng (Northeast Petroleum University) | Kangxing Dong (Northeast Petroleum University) | Jintang Liu (Daqing Oilfield Company) | Huaiyu Zhang (Daqing Oilfield Company)
- Document ID
- Society of Petroleum Engineers
- SPE Production & Operations
- Publication Date
- June 2020
- Document Type
- Journal Paper
- 2020.Society of Petroleum Engineers
- quaternary oil recovery, cyclic displacement, sucker-rod pump, downhole oil-water separation, high water cut
- 8 in the last 30 days
- 18 since 2007
- Show more detail
- View rights & permissions
|SPE Member Price:||USD 5.00|
|SPE Non-Member Price:||USD 35.00|
At present, many oil fields in China have entered the high-water-cut production period, and the water cut of oil wells has continued to rise. Therefore, how to reduce the water cut of the produced liquid, reduce the amount of surface water treatment, shorten the ineffective water circulation, and reduce the comprehensive production cost have become the key problems restricting the sustainable economic exploitation of a high-water-cut oil field. To this end, the development model of circular displacement and the oil-recovery technology of a downhole oil/water-separation system with sucker-rod pump (DOWS-SRP) are proposed. The technology system consists of downhole oil/water-separation devices, an injection/production pump-string system, a sealing system, and downhole data-test system, mainly applied to separating the oil and water in the well through the separation device. The separated water is then directly injected into the formation and the separated concentrated liquid is lifted to the ground so the water injection and oil recovery are completed simultaneously in the same wellbore. The field-test data show that after the implementation of injection/production technology in the same well, the surface liquid-production volume decreased by 90%, the water-cut decreased by 27%, and the water/oil ratio decreased by 93%. In addition, the liquid volume of lifting, gathering, and treatment was greatly reduced, as well as the surface infrastructure investment, to achieve the purposes of cost saving, energy saving, and consumption reduction. At the same time, the downhole reinjection replaces surface water injection, transforming ineffective surface water circulation into effective internal displacement power in the reservoir and improving the yield and recovery rate. The successful application of the quaternary-oil-recovery block has made it possible to redevelop a large number of abandoned oil reservoirs, providing a potential basis for quaternary oil production. In addition, the preliminary energy-saving effect and economic-benefit analysis are performed. The data show that the energy-saving effect of this technology is obvious and good economic benefit is obtained.
|File Size||5 MB||Number of Pages||15|
Amini, S., Mowla, D., Golkar, M. et al. 2012. Mathematical Modelling of a Hydrocyclone for the Down-Hole Oil–Water Separation (DOWS). Chem Eng Res Des 90 (12): 2186–2195. https://doi.org/10.1016/j.cherd.2012.05.007.
Bao, Q., Zhang, Z., and Zhang, B. 2003. Discuss of Downhole Oil–Water Separation and Reinjection Through Same Well Technology. Oil Drilling & Production Technology 2: 70–72.
Bowers, B. E., Brownlee, R. F., and Schrenkel, P. J. 2000. Development of a Downhole Oil/Water Separation and Reinjection System for Offshore Application. SPE Prod & Fac 15 (2): 115–122. SPE-63014-PA. https://doi.org/10.2118/63014-PA.
Chen, H. 2018. Study on Downhole Oil/Water Separation Technology. Petrochemical Industry Technology 25 (1): 91.
Chen, X. 2017. Sedimentary Facies Describing Method for the Horizontal Well in the Thin Low-Abundance Oil Reservoirs of South Gulong. Petroleum Geology & Oilfield Development in Daqing 36 (4): 26–32.
Denney, D. 2004. Downhole Oil/Water Separation Systems in High-Volume/High-Horsepower Application. J Pet Technol 56 (3): 48–49. SPE-0304-0048-JPT. https://doi.org/10.2118/0304-0048-JPT.
Dong, K., Jiang, M., Cheng, T. et al. 2019. Rational Matching Injection and Production Pump for Rod Pump Injection-Production Systems. Chem Technol Fuels Oils 55 (4): 473–482. https://doi.org/10.1007/s10553-019-01053-1.
Gu, L. 2016. Historical Review and Future Tendency of Oil Production in China. Acta Petrolei Sinica 37 (2): 280–288. https://doi.org/10.7623/syxb201602016.
Gu, Z. and Shen, L. 2001. Downhole Oil/Water Separation and Reinjection Dual-Action Pump Pumping System. China Petroleum Machinery 29 (6): 52–54.
Jiang, L. 2014. Fine Characterizing Method of the Reservoirs for the Horizonal Well in Low-Abundance Oil Reservoirs. Petroleum Geology & Oilfield Development in Daqing 33 (4): 70–73.
Jiang, M., Duan, T., Liu, J. et al. 2017. Application and Node Mechanics Analysis of Sucker Rod Pump Injection/Production System. China Petroleum Machinery 45 (7): 97–100.
Jiang, M., Zhang, D., Feng, Z.-M. et al. 2019. Dynamic Model and Analysis of a Sucker-Rod Pump Injection-Production System. Tehnicki Vjesnik 26 (5): 1451–1460. https://doi.org/10.17559/tv-20190215172608.
Kjos, T., Sangesland, S., Michelet, J. F. et al. 1995. Down-Hole Water-Oil Separation and Water Reinjection Through Well Branches. Paper presented at the SPE Annual Technical Conference and Exhibition, Dallas, Texas, USA, 22–25 October. SPE-30518-MS. https://doi.org/10.2118/30518-MS.
Liu, B. 2013. Structure Optimization and Experimental Research of Multicup Isoflux Oil-Water Separator. PhD dissertation, Northeast Petroleum University, Daqing, China.
Liu, D., Wang, W., Gong, L. et al. 2014. Analysis of Development Status of Same Well Injection Technology in Oil and Gas Wells. Chemical Enterprise Management 29: 243.
Liu, H., Gao, Y., Pei, X. et al. 2018. Progress and Prospect of Downhole Cyclone Oil/Water Separation with Single-Well Injection/Production Technology. Acta Petrolei Sinica 39 (4): 463–471. https://doi.org/10.7623/syxb201804010.
Liu, H., Hao, Z., Wang, L. et al. 2015. Current Technical Status and Development Trend of Artificial Lift. Acta Petrolei Sinica 36 (11): 1441–1448. https://doi.org/10.7623/syxb201511014.
Liu, X., Wang, Z., and Jin, Y. 2007. Application and Prospect of Downhole Oil/Water Separation Technology. China Petroleum Machinery 35 (2): 51–53.
Matthews, C. M., Chachula, R., Peachey, B. R. et al. 1996. Application of Downhole Oil/Water Separation Systems in the Alliance Field. Paper presented at the SPE Health, Safety and Environment in Oil and Gas Exploration and Production Conference, New Orleans, Louisiana, USA, 9–12 June. SPE-35817-MS. https://doi.org/10.2118/35817-MS.
Peachey, B. R., Solanki, S. C., Zahacy, T. A. 1998. et al. Downhole Oil/Water Separation Moves into High Gear. J Can Pet Technol 37 (7): 34–41. PETSOC-98-07-03. https://doi.org/10.2118/98-07-03.
Ren, M., Cheng, J., Zhang, Z. et al. 2004. Downhole Oil/Water Separation Production Technology. Oil Drilling & Production Technology 26 (6): 62–64.
Tian, N., Fan, H., and Ma, T. 2011. Application of Downhole Oil/Water Separation Technology in Caofeidian Oilfield. Oil-Gasfield Surface Engineering 30 (12): 95–96.
Veil, J. A. 2000. Downhole Oil/Water Separators—What’s New? Oral presentation given at the Produced Water Seminar, Houston, Texas, USA, 19–21 January.
Veil, J. A., Langhus, B. G., Belieu, S. et al. 1999a. DOWS Reduce Produced Water Disposal Costs. Oil & Gas J. 97 (12): 76–85.
Veil, J. A., Langhus, B. G., Belieu, S. et al. 1999b. Feasibility Evaluation of Downhole Oil/Water Separator (DOWS) Technology. Technical Report ANL/EA/RP-97345, Argonne National Laboratory, Argonne, Illinois, USA, January 1999.
Wang, D. 2010. New Developments in Improved Oil Recovery. Journal of Daqing Petroleum Institute 34 (5): 19–26.
Wang, L. and Wang, L. 2002. Design of Gravity Separation Downhole Oil/Water Separator. China Petroleum Machinery 30 (3): 36–38.
Yan, T., Li, Z., Wang, H. et al. 2000. Design of Oil/Water Separation System for Electric Submersible Pump Downhole. China Petroleum Machinery 28 (9): 5–7.
Zhang, F., Zhang, Y., Li, T. et al. 2019. Deformation Stability Analysis of Packer Rubber Cylinder. Lubrication Engineering 44 (5): 34–39.
Zhao, C. W. and Li, Z. L. 2011. Design of Down-Hole Oil-Water Separation and Reinjection in the Same Well System with Surface Driving Single Screw Pump. Adv Mater Res 339: 595–602. https://doi.org/10.4028/www.scientific.net/AMR.339.595.
Zhao, L., Song, G., Xu, B. et al. 2015. Optimization of Two-Stage Tandem Tubing String for Downhole Oil/Water Cyclone Separation. China Petroleum Machinery 43 (10): 76–80.