An Invention of Special Liner Completion Technology with Deeper Stimulation Capabilities for Tight Carbonate Reservoir Productivity and Injectivity Enhancement

Abstract Tight carbonate reservoir productivity and injectivity enhancement along with sustainability has been a challenge in the oil and gas industry for an extended period. Limited entry liner technology is one of the technologies that can stimulate the horizontal section up to 4 ft only. This technology is a onetime application only and allows near well bore penetration of acid to connect the sublayers and natural fractures within the target zone limiting the sustainability. New liner completion technology, consisting of partly liner subs to introduce special needles that can penetrate deeper into the formation up to 40 ft, and remaining liner subs with special holes that can jet the acid up to 4 ft is under piloting. This innovative technology has the capability to connect sublayers and natural fractures that improves the poor vertical communication (low Kv/Kh) within the target zone, and simultaneously can stimulate the horizontal section to bypass the near well bore damage. In addition, this technology provides a flexible option for deep stimulation of the reservoir during installation, followed by near well bore stimulation using liner holes as a second step after a certain production duration. This flexibility provides a backup option for regaining sustainability after a production period. This innovative technology pilot is under implementation at field A. The reservoir is a tight carbonate reservoir with a permeability range of 1-2 md. The present strategy is to install limited entry liner completions as part of the field development. However, the successful implementation of the new pilot with special liner completion expected to increase the production rate by three times, providing the opportunity to revise the field development plan with special liner technology in the upcoming new well drilling campaign. This paper will provide the details of the technology, well selection, completion design, implementation steps, pilot results along with lessons learned for inclusion as part of the next phase of implementations. It will further discuss the well monitoring plan, data collection and performance evaluation of the pilot. In summary, this technology will provide a backup option to conduct stimulation in case the sustainability of well productivity needs to be reestablished and overcome the current limitation of advanced completion stimulation techniques. This technology is an invention that combines deep acid stimulation technique and near well bore jetting with an option to execute them either together or separately.