Technology solutions and challenges for marginal development of heavy oil fields in CuuLong basin, offshore Vietnam
- Authors: An Hai Nguyen 1*, Vinh The Nguyen 2, Thang Manh Pham 3
1 PetroVietnam Exploration Production Corporation (PVEP), Hanoi, Vietnam
2 Faculty of Oil and Gas, Hanoi University of Mining and Geology, Vietnam
3 CuuLong Joint Operating Company (CLJOC), Ho Chi Minh City, Vietnam
- Keywords: Development, Diesel injection, Dong Do field, ESP, Heavy oil.
- Received: 29th-Apr-2022
- Revised: 11st-Aug-2022
- Accepted: 10th-Sept-2022
- Online: 31st-Dec-2022
- Section: Oil and Gas
The production of heavy oil at Dong Do field located in CuuLong basin is a success in the application of advanced technologies. Dong Do field is a marginal project in Vietnam, so its development requires to overcome several challenges, such as high water-cut from early stage, highly unconsolidated sandstone reservoir, flow assurance problems of sour and viscous crude oil, high power artificial lift system, and complex crude treatment at topsides, among others. Over the past decades, production technology application in heavy oil production has been widely deployed in the industry. Apart from the thermal method, the combination of gaslift and ESP technology makes the remarkable advances by enlarging the draw-down created over the conventional pumping lift in heavy oil projects. In fact, heavy oil production with a high flow rate has appeared water-coning in near wellbore region that made the water breakthrough early and water-cut increased rapidly. The pilot test of injecting diesel into heavy oil wells has been applied to producers with the positive results while significantly reduced water-cut comparing before wells shutin. This paper provides a thorough analysis of the new technologies that are applied to Dong Do field, highlighting its key difficulties and how they were resolved through a successful pilot and testing of the cutting-edge advanced solutions, improving the project reliability and thus motivating the consortium to move on to the new field. Also, the updated new heavy oil field schedule is described, highlighting the challenges to be faced during the next projects of marginal development.
Dennis, B. (2009). Waterflooding viscous oil reservoirs. SPE Reservoir Evaluation and Engineering, 12(5), 689-701. DOI: 10.2118/113132-PA.
El-Moniem, A. (2020). Heavy Oil Production, Review Paper. Emirates Journal for Engineering Research, 25(4), 5.
Lamson JOC. (2016). ThangLong-Dong Do field update reserves assessment report.
Manoj, D. V., Kumar, P. A., Matla, S., and Rao, K. S. (2021). Design and Simulation Studies on An ESP System. International Journal of Engineering Research and Technology, 10(08).
Nguyen, H. A., Tran, A. Q., Nguyen, H. D., Nguyen, T. V., Nguyen, V. T. (2020). Studying and testing on diesel injection into water - coning zone to reduce water-cut in heavy oil production wells from Middle Miocene reservoir, CuuLong basin. Earth sciences and Natural resources for sustainable development. November, Hanoi, Vietnam, 1-7.
Santos, R., Loh, W., Bannwart, A. C., and Trevisan, O. V. (2014). An overview of heavy oil properties and its recovery and transportation methods. Brazilian Journal of Chemical Engineering, 31, 571-590.
Speight, J. G. (2006). The Chemistry and Technology of Petroleum, CRC Press. Boca Raton.
Sun, Y., Li, Z., Sun, Y., and Wang, S. (2021). Viscosity reduction of offshore heavy oil by application of a synthesized emulsifier and its microscopic mechanism during thermal recovery. Petroleum Science and Technology, 39(11-12), 421-429.
Swadesi, B., Ahmad Muraji, S., Kurniawan, A., Widiyaningsih, I., Widyaningsih, R., Budiarto, A., and Aslam, B. M. (2021). Optimizing the development strategy of combined steam flooding and cyclic steam stimulation for enhanced heavy oil recovery through reservoir proxy modeling. Journal of Petroleum Exploration and Production Technology, 11(12), 4415-4427.
Tran, S. T., Vu, H. V., Le, V. M., Nguyen, T. N., Nguyen, L. H., Prajunla, P., and Dong, H. M. (2016, November). Hybrid system of ESP and gas lift application from conceptual design pilot test to system analysis. In SPE Middle East Artificial Lift Conference and Exhibition. OnePetro.
Wang, J., Feng, L., Steve, M., Tang, X., Gail, T. E., and Mikael, H. (2015). China's unconventional oil: A review of its resources and outlook for long-term production. Energy, 82, 31-42.
Zhang, J., Zhang, F., Kang, X., and Li, B. (2019). Development and application of chemical EOR technologies in China offshore oil fields. In Enhanced Oil Recovery Processes-New Technologies. IntechOpen.