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Upstream Natural Gas Sales Verification Producer and Pipeline Perspectives

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February 16, 2014

Within the upstream sector of the oil and gas indus- try, the custody transfer of natural gas is usually de- termined by orifice measurement which is governed by a sales agreement between the producer and pipeline company. In most cases, the gas sales agreement references a combination of American Gas Association (AGA), American Petroleum Insti- tute (API), and Gas Processors Association (GPA) standards which are to be incorporated into the cus- tody measurement procedures. Verification that the physical deliveries of natural gas are accurate and accountable, for both parties, is fundamental to the business cycle that occurs each month. This paper reviews the relationships between producer and pipeline, the varying responsibilities of each party, and some useful methods to produce more accurate and accountable natural gas measurement results.

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