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Smart Wells |
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First Smart Wells in Russia
One of the advantages of SPD as a Joint Venture company with foreign capital is the possibility to have access to the state-of-the-art technologies tested elsewhere by oil producing companies of Shell, which is one of the founders and shareholders of SPD. The company is making use of this possibility in the development of Vadelyp field. In December 2006, SPD started construction of smart wells at Vadelyp, the first smart wells in Russia, and currently two smart wells are producing.
What are smart wells?
Smart wells are where equipment is installed downhole to measure real time data at surface and allow control of flow from or injection into different intervals. Standard wells cannot achieve this and infrequent measurements are required with data gathering and control only by well intervention or expensive workovers, which results in oil deferment and downtime.
By using and adjusting downhole equipment from surface, SPD will be able to combine production from different reservoir intervals in the same well. This will also allow measurement of flow from each interval and when necessary the ability to open and close production per interval to minimise water production or interference between zones.
The main equipment devices used are downhole flowmeters and downhole interval control valves, which can then transmit data to surface or be operated from surface.
Why SPD is using Smart Wells in Vadelyp
In the Vadelyp field it is planned to produce from several reservoirs. The reservoir engineers need to understand how much production is coming from each reservoir so that predictions can be made about future oil recovery and the field properly managed. The field operations staff need to monitor and allocate production to different reservoirs to optimize production and to comply with statutory requirements. Without smart wells it would be necessary to drill separate wells into each reservoir to get the same data gathering and control. This will also bring both environmental and economic advantages as fewer well pads and roads will have to be constructed.
Since smart wells are new to Russia, SPD will start using downhole flowmeters in the first few Vadelyp wells with control by intervention and then introduce downhole control valves in the later stages. Once proven in Vadelyp then smart wells could be applied in other Salym fields to allow monitoring and control of production from the different reservoirs, and help optimize well production and improve the ultimate recovery through better control of the sweep in the reservoir.
Ultimately, SPD will move to three zone producer completions measuring flow from each zone and controlling production per interval from surface. Similarly for water injectors SPD will be able to measure injection into each reservoir interval and control where the water is being injected to maximize oil recovery.
The Future - Smart Fields
The Smart Well project is an important part of a potential larger Smart Fields initiative in SPD. The term "Smart Fields" describes the manner through which SPD aims to maximize the lifecycle value of an asset, such as Vadelyp, through continuous optimization of all its components: wells, reservoirs, pipelines and facilities. Smart Fields is about the ability to measure and control and its principle is captured in the Smart Fields Value Loop.
This value loop is applied by assessing the key decisions, which are to be made to optimize life cycle value. The measurements from the wells and facilities (eg. pressure, zonal flow rates, composition, temperature) are stored and processed as data are fed into real time models (subsurface, well inflow and outflow, surface facilities models) that can be used to understand the current and future behavior of the wells and reservoirs.
Subsequently, these models can be used to generate and evaluate options to improve this behavior with respect to the project’s drivers and constraints and make decisions on the optimum setting of the integrated production system. When smart fields technology is applied correctly, these options will result in a reduction in life cycle cost, optimized production and increased recovery. Smart wells, as the key link to the reservoirs, are instrumental to achieve this kind of smart development of a field.
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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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