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- W2092980969 abstract "Abstract VICO Indonesia operates the Sanga-Sanga Block in Indonesia as a Production Sharing Contractor to PERTAMINA, the Indonesian National Oil Company. The Sanga-Sanga Block is located in East Kalimantan near the city of Balikpapan and consists of four major fields producing approximately 1.3 BCFD of gas and 50,000 BLPD. The processed gas is delivered into a pipeline system that carries the gas to the Bontang liquefaction plant. The gas is converted to LNG for distribution and sales throughout the Asia Pacific Rim. The main geological depositional system is fluvio-deltaic. Nilam and Badak, the two largest fields, contain numerous stacked pay intervals that can total up to 1,000 net feet of pay in 50 separate reservoirs that are distributed over as much as 7,000 vertical feet. The reservoirs are in a sand/shale sequence deposited in a channel sand and point bar environment. There are some oil accumulations, but the majority of the reservoirs are gas. There are a few large reservoirs in the hundreds of BCF range, but most are smaller reservoirs, less than 20 BCF. For over twenty years, VICO Indonesia drilled and completed conventional gas wells that included dual tubing strings and multiple packers. The large number of individual reservoirs and their small size makes dedicating a well to a single reservoir impractical. Numerous workovers are required with this type of geology and the dual completions are complicated and expensive. As the fields age, the number and cost of the workovers continuously increase. Because of the mechanical limitations in dual tubing string completions, the options for stimulation are limited and the potential for formation damage during workover operations is substantial. In 1996, a multi disciplinary team was formed to evaluate the benefits and risks of various new well architectures for future Nilam Field development. The study concluded that a monobore or tubingless completion was the best option. The 4-1/2 monobore completion eliminates all packers, nipples and sliding sleeves and is especially appropriate for gas production because water handling and artificial lift is usually not required. This new well architecture has been implemented and successfully reduces drilling and completion cost by 20%. It also allows significant improvement in completion techniques, eliminates rig workovers, increases reserve recovery per well, and reduces the number of future drilling wells. The tubingless completion also allows better reservoir evaluation and selective zone stimulation or isolation. This paper will review the monobore evaluation process, benefits, and results to date." @default.
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- W2092980969 date "2000-10-16" @default.
- W2092980969 modified "2023-10-16" @default.
- W2092980969 title "New Well Architecture Successfully Optimizes the Development of Fluvio-Deltaic Multi-Layered Gas Field" @default.
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- W2092980969 doi "https://doi.org/10.2118/64394-ms" @default.
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