Improving CSS Performance with Preformed Foam: Teca - Cocorna Field Case
- Romel Perez (Ecopetrol S.A.) | Hector Rodriguez (Ecopetrol S.A.) | Carolina Barbosa (Universidad Industrial de Santander) | Eduardo Manrique (Ecopetrol S.A.) | Luis Garcia (Universidad Industrial de Santander) | Gabriel Rendon (Ecopetrol S.A.)
- Document ID
- Society of Petroleum Engineers
- SPE Latin American and Caribbean Petroleum Engineering Conference, 27-31 July, Virtual
- Publication Date
- Document Type
- Conference Paper
- 2020. Society of Petroleum Engineers
- 5 Reservoir Desciption & Dynamics, 4.7 Unconventional Production Facilities, 2.1.3 Completion Equipment, 5.4 Improved and Enhanced Recovery, 2.5.2 Fracturing Materials (Fluids, Proppant), 4 Facilities Design, Construction and Operation, 4.7.2 CO2 Capture and Management, 5.4.6 Thermal Methods, 6.5.3 Waste Management, 5.4 Improved and Enhanced Recovery, 2 Well completion, 5.10 Storage Reservoir Engineering, 2.4 Hydraulic Fracturing
- CCS Optimization, Heavy Oil, FOAM Injection, Thermal EOR, Conformance
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Cyclic Steam Stimulation (CSS), is the most applied thermal enhanced oil recovery (EOR) method worldwide. However, despite the vast experience gained over the last few decades CSS still has its challenges including but not limited to energy efficiency and operational costs. CSS has been evaluated for several years in Colombian heavy oil reservoirs. As CCS approaches its maturity, new alternatives and injection strategies are required to potentially extend the technical-economic limit of this recovery process.
This work is focused on the procedure implemented during the design, execution and monitoring of the hybrid technology of steam plus foam as a strategy to improve the performance of a mature CSS process. The strategy developed for experimental tests, numerical simulations and pilot test is described. The evaluation of well head configuration, injection facilities and schedules to assure a good quality and stability of the preformed foam is also discussed.
The CSS-foam injection pilot was performed in Teca - Cocorna field. The cumulative surfactant injection was between 3 to 5 tons distributed between two mature wells under CSS at a concentration of approximately 2500 ppm. The facilities used for the foam generation with nitrogen at surface conditions and well injectivity performance will be discussed.
Early incremental production due to foam injection has been positive. The first CSS-foam pilot tests allowed the assimilation of lessons learned to incorporate best practices for the continuous improvement in the operation of CSS processes. The performance of CSS-Foam will be updated based on the pilot results due to the level of uncertainties associated with the scaling of laboratory results. According to the performance of the pilot, Ecopetrol will continue evaluating this hybrid CSS technology to improve oil recovery and energy efficiency in fields with steam injection.
|File Size||963 KB||Number of Pages||14|