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Well and Reservoir Management Project |
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Salym Petroleum Development started commercial production of oil in November 2005. Since then, production grew steadily and quickly to reach 22 tons per day. About 350 wells have been drilled, including producer wells with ESPs, water injectors and supply wells.
The Company is in transition from a Development to an Operating Company, with plans for some 1000 wells, a production profile that shows a steep decline in oil production, and a corresponding increase in water production.
The Well and Reservoir Management (WRM) project aims for a structural and sustainable development of the fields across all SPD license areas to support the continued growth in well stock, whilst accelerating production, increasing reserves additions and containing operating costs.
Key enablers of the project are the implementation of the Smart Field Foundation Mark 1 (SFF Mk 1) programme, embedment of the LEAN methodology in the Company, and Management commitment. The SFF Mk 1 Project vision is that the Salym team will have the information, workflows, tools and capabilities to continuously optimise the Salym fields. The pilot phase was successfully deployed in December 2008 covering a total of 30 wells on two well pads.
In 2008 the following WRM activities were carried out:
a) Production System Optimization
On a weekly basis the production performance of all producers is reviewed, and opportunities identified to optimize the speed of the ESP by changing the frequency of the Variable Speed Drive. The associated production gains are tracked and for 2008 this resulted in an additional production of 150,646 m3 compared to 218,162 m3 in 2007.
b) Reduction of Locked In Production
Various wells are production constrained (and having a Locked In Potential - LIP) since they are completed with too small pumps. This is caused due to the uncertainty in the well productivity prediction (and therefore ESP sizing) during initial completion and/or due to increase of well productivity with time (due to pressure increase) as a result of water injection. During 2008 in 25 wells the ESP size was increased to reduce the LIP. This has resulted in a production gain of 230,000 m3 and a reduction of LIP of some 1600 m3/d gross.
c) Additional perforating / reperforating
Additional zones and/or existing zones were (re) perforated during workovers in 15 wells. This has resulted in a production gain of 49,500 m3.
d) Water shut offs
In three wells bridge plugs were installed and/or cement squeezes carried out to shut off water producing zones. This has resulted in a production gain of 40,600 m3.
e) Hydraulic fracturing
During 2008, 22 wells (9 wells in 2007) have been hydraulically fracced using diesel as frac fluid during initial completion or workover. This has resulted in a production gain of 144,600 m3.
f) Production Inflow during TCP perforating under drawdown
The production inflow performance of the well is being assessed during tubing conveyed perforating by measuring the speed of the fluid level rise of the annulus using Echometers. The data are used to verify the planned pumpsize based from logs.
The SFF Mk 1 project was expanded to cover all SPD producing and injection wells by May 2010. |
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INFORMATION |
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Copyright © 2004 Salym Petroleum Development N. V.
// Russia, 31, Novinsky blvd, Moscow,
Tel.: +7 (495) 518-97-20,
Email: info@spdnv.ru |
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