© 2019 Department of Petroleum Resources. All rights reserved Department of Petroleum Resources (DPR) PROCEDURE GUIDE

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109 | P a g e

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UTI- Ullage, Temperature and Interface

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GCV- Gross calorific value

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INJECTOR – Any producer of crude oil/condensate that pumps into a trunk
pipeline/terminal (Both operators and the third party)

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PRODUCTION METERS – Any DPR approved meters used for production accounting.

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ALLOCATION METER – Any DPR approved meter used for accounting of volumes
pumped into a trunk pipeline/terminal.

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CUSTODY TRANSFER METER – Any DPR approved meter that is used for the transfer of
ownership for handling/safe keeping.
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GCV (Volumetric) – The quantity of heat measured in Joules produced by complete
combustion in air of one cubic metre of anhydrous ideal gas taken at a 15◦c and at an
absolute pressure of 101.325 pascals.
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GCV (Mass) – The quantity of heat measured in joules produced by complete
combustion in air of one kilogram of anyhydrous ideal gas taken at 15◦C and in absolute
pressure of 101.325 pascals.
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WOBBE INDEX – The gross calorific value (Volumetric) of the Degasified LNG divided by
the square root of the molecular weight of the degasified LNG compare with air.
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Xi – is the concentration of component i.
• Recognized standard:
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Guidelines, Standards or similar documents that within a technical field, are international or
nationally recognised. Also, Acts or regulations, that are not directly applicable but which,
regulate corresponding or neighbouring areas of activity.
• Area of application:
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Any installation, a subsea installation or a terminal owned by Oil and/or Gas Operator where
Gas metering system is in operation.
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Place of Manufacture:
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Factory or a workshop where one or more of the measurement system’s main parts are
fabricated or constructed.
• Datafile:
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Groups of data stored in an electronic unit
• Computer part:
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The part of the measurement system, which comprises of digital computers and receives
digital metering signals from A/D converters or from digital instrument loops.
• Computer for administrative routines:
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Computer connected to one or more flow calculation computers. Information from the flow
calculation computers may be further processed for reporting purposes. Information may
be transferred from the administrative computer to the flow calculation device. The
administrative unit may include long and short-term data storage facilities.
• Flow computer:
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