High-performance thermal self-healing cements prove successful in extreme conditions
Reversing the natural process of pressure decline in hydrocarbon deposits and decreasing damage in the sandface caused by drilling, production, etc. are the most significant operator objectives for maximizing the extraction of hydrocarbon reserves. This paper discusses the successful application of cementing technologies in thermal wells to maximize the life of the well.
In areas, such as the Orinoco Belt, the implementation of cyclic and continuous steam injection helps decrease oil viscosity and improves oil-relative permeability to increase production. Because conditions downhole vary dramatically, it is recommended that cement slurry designs be based on the position in the hole and the conditions to which slurries will be subjected during their lifetime. To help overcome these challenges, combinations of optimized treatment procedures and technologies were applied to wells in extreme conditions, demonstrating improved results.
In fields where conditions do not allow the drainage of oil reserves by natural production mechanisms, the application of improved recovery methods can provide benefits in terms of crude properties and productivity of the well. Using new-generation integral zero running force centralizers attached to the casing helped improve centralization. High-performance thermal self-healing cements were the most suitable choice for cementing under these conditions. Temperatures encountered by the cement slurry during and after placement were estimated using a simulator, which considers the heat transfer phenomena. Displacement of mud was enhanced using a state-of-the-art three-dimensional (3D) simulator to design a custom-fit solution.
Applications of these technologies have been successful, providing zonal isolation at production zones and minimizing remedial work.
These technologies can be applied using appropriate modifications for different global regions where similar challenges are encountered; additionally, they have the potential to provide cost benefits.
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Source: SPE Thermal Well Integrity and Design Symposium, 23-25 November, Banff, Alberta, Canada
Authors: Rodrigo M. López (Halliburton) | Rafael J. Urbaneja (Halliburton) | Asdruelys Marquez (Petrocedeño)