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Oil and Gas Systems, a supplier of equipment for onshore and offshore installations, has purchased Able McCrometer V-Cone meters for its gas metering skid for the new Oselvar production module.

The module is due to be installed on the BP-operated Ula platform.

The decision to purchase the Able McCrometer V-Cone meters was made by BP, Aker Offshore Partnership and SGC.

The V-Cone flowmeters will be used to meter the produced gas, with two 100 per cent meter runs.

In view of the required turndown, each meter will consist of two V-Cone flowmeters – one for high-flow measurement and one for low-flow measurement.

Provisions for spot sampling are also included downstream of the outlet header.

The Oselvar field is located in the PL274 licence and is operated by Dong E and P Norge.

Appraisal wells on Oselvar were drilled in 2007-08 to investigate the reservoir’s deliverability and to acquire the fluid characterisation.

The appraisal well was drilled to a total depth of 10,787ft (3,288m) and stopped in sediments of the Early Paleocene age.

The reservoir thickness and the expected reservoir characteristics were confirmed; these characteristics helped to establish that Oselvar contained oil and associated gas.

The Oselvar field base case plan is for a subsea development with three horizontal production wells; the subsea facilities will terminate at the riser bottom.

Production is expected to start in the fourth quarter of 2011.

Control and chemicals will be provided by the Ula host installation via an integrated electro-hydraulic umbilical.

The well stream will arrive at the Ula facilities at a pressure of approximately 30bar and at a minimum temperature of +25C.

The Oselvar production will be processed at Ula and the gas will be either re-injected or exported via the UGIP pipeline to the Gyda and Ekofisk facilities.

Able was chosen because it was project approved and had the ability to supply in duplex SS to Norsok specifications.

Along with the minimal straight-pipe-run requirements needed by the V-Cone, this choice was important because of the combination of the harsh environment and the process conditions.

The meters are the primary measuring device on the gas skid produced by Oil and Gas Systems.

The differential-pressure (DP) measurement derived from the meters is transmitted to the flow computers and, along with pressure, temperature and other measurements, is used to accurately calculate the flow through the metering skid.

The Able McCrometer V-Cone flowmeter is an advanced DP instrument, which is said to be ideal for use with liquid, steam or gas media in rugged conditions where accuracy, low maintenance and cost are important.

With its DP built-in flow conditioning design, the V-Cone is useful in tight-fit and retrofit installations in which the long runs of straight pipe required by orifice plates, Venturi tubes and other technologies are either impractical or unavailable.

The V-Cone is designed for challenging oil and gas production, chemical, food and beverage, plastics, pharmaceuticals, district heating, ventilation and air-conditioning (HVAC), textile, power and water and wastewater applications.

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