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A study by a real-time monitoring company showed that many coiled-tubing strings are retired with a lot of life left in them. It suggested companies could lower costs by using pipe for a longer time and could benefit from multicompany studies showing how their decisions compare to the competition. A coiled-tubing selective perforating and activation system that transmits critical downhole data and measurements in real time is enabling well interventions that previously could not have been executed. This year’s papers provide examples of efficiencies that have been brought about in coiled-tubing operations. The papers demonstrate how problem-solving techniques have been applied to improve such aspects as on-site processes, fit-for-purpose equipment, and more-effective treatment placement.
A study by a real-time monitoring company showed that many coiled-tubing strings are retired with a lot of life left in them. It suggested companies could lower costs by using pipe for a longer time and could benefit from multicompany studies showing how their decisions compare to the competition. This paper describes the integrated approach taken by Petronas to reinforce effective management of fatigue. The installation of flowlines in ever-deeper and -more-remote areas requires specific technologies for precommissioning. Coiled tubing can be a solution, but long durations may affect tubing stress and fatigue.
Plug-and-abandonment (P&A) operations can be expensive, leading to negative net present value. Historically, P&A operations in the North Sea—estimated to hold some 3,000 wells of declining production—were performed with either drilling or workover rigs. Larger-diameter coiled tubing recently has been used to perform millouts because of its improved set-down force and increased annular velocities for cleanout purposes. Service companies and operators have reduced the number of wiper trips when using larger-diameter CT, to save time and money.
A study by a real-time monitoring company showed that many coiled-tubing strings are retired with a lot of life left in them. It suggested companies could lower costs by using pipe for a longer time and could benefit from multicompany studies showing how their decisions compare to the competition. This paper describes a methodology for classification of artificial-lift-system (ALS) failures and addition of a commonly used root-cause failure classification. The great majority of wells do not pollute.
Thank you for attending the SPE Workshop. Across the Middle East and North African region, wells are being drilled at ever increasing depths and lengths. Wells that several years ago would have been unthinkable to reach with traditional intervention techniques are now becoming the norm, and novel techniques, equipment, tools, and products are being developed and implemented to reach even further. Stimulation and chemical placement continue to drive production recovery in some areas, while the application of digital tool technologies and extended reach interventions allows unlocking some well potential. The coiled tubing utilisation is also becoming evident for supporting frac-ing activity both conventional and unconventional reservoirs.
The complete paper discusses an advanced matrix-stimulation work flow that brings reliability and flexibility to the acidizing of tight carbonate water injectors and has delivered injectivity improvements tight carbonate onshore reservoirs in the Middle East. This paper describes a coiled tubing gas lift (CTGL) technique successfully used to restart production from two pilot wells in a mature field in Pakistan that had been shut in since 2015. Some well-testing operations are executed by performing multiple runs in hole using slickline and coiled tubing (CT). A technology has been developed that combines many of these operations, including contingency stimulation activities, into one run. The papers summarized in this year’s feature demonstrate the application and versatility of coiled-tubing-based solutions to different phases of a well’s lifecycle, from exploration through production and, finally, to abandonment.
This seminar will begin with a very brief review and refresher of basic CT equipment and well control components. The remainder and primary focus of the seminar will be on job design consideration, safety considerations, and job execution of common CT intervention job types including: Nitrogen lifting, Proppant or fill cleanout, Milling, Acid Stimulation, logging, and perforating. You should attend this seminar to expand your knowledge of coiled tubing applications and engineering design considerations that can directly affect your operations both positively and negatively. There are great cost savings to be realized when CT interventions are conducted safely and efficiently. Equally, poorly understood and planned CT interventions create costly and sometimes dangerous problems during a CT intervention.