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• W4212784258 abstract "Abstract A variety of cleanout methods have been developed in the past to remove scale and sand fill accumulation from the wellbore section to restore well potential. The success rate for such operation is impacted by multiple factors, such as fluid properties, limited annular velocities, particle size, reservoir pressure and wellbore diameter. In addition, this process commonly involves applying excess hydrostatic pressure on the formation to circulate wellbore fluids which can result in lost circulation and formation damage. This paper aims to share the technical details along with the field results for a novel vacuuming system with integrated real-time data, which can be operated in three different modes to remove both undesirable liquids and solids. The process involves pumping a low cost cleanout fluid down the internal string through a jet pump and venturi nozzle assembly. A localized pressure drawdown is created at the bottomhole assembly (BHA), drawing wellbore liquids and solids into the return flow, and the entrained flow is returned up the outer coiled tubing string to surface. Several cleanout jobs have been successfully performed in the field using this technique. The use of empirical correlations that have been developed and incorporated into an existing proprietary solids transport computer algorithm which played a vital role in the optimization of the hole cleaning process. Post job results will be discussed in this paper including fill diagnostic process, assessment of cleanout method, job design, selection of fluids, CT bottomhole assembly tools, job execution, field experience and post-cleanout performance evaluation. This paper will describe a reliable alternative combining an integrated vacuuming system and real-time monitoring that can effectively remove scale and sand fill accumulation caused by excessive sand production and fines migration in large wellbore diameter where annular fluid velocity and lifting efficiency is a major challenge. The novelty of this approach is its ability to create a wellbore vacuuming system that can provide efficient lifting capabilities while eliminating the need for high cost fluids and large quantities of N2 in deep horizontal extended reach wells. Recommendations and lesson learned from several field cases are also shared to further improve the cleanout process." @default.
• W4212784258 created "2022-02-24" @default.
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• W4212784258 date "2022-02-21" @default.
• W4212784258 modified "2023-09-27" @default.
• W4212784258 title "Improved Sand Fill Cleanout Utilizing an Integrated Vacuuming System and Real-Time Monitoring in Horizontal Extended Reach Wells" @default.
• W4212784258 doi "https://doi.org/10.2523/iptc-22344-ms" @default.
• W4212784258 hasPublicationYear "2022" @default.
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