SMOOTHING METHOD AIDS GAS-INVENTORY VARIANCE TRENDING

Robert G.Mason Transcontinental Gas Pipe Line Corp. Houston A method for determining gas-storage inventory and variance in a natural-gas storage field uses the equations developed to determine gas-in-place in a production field. The calculations use acquired data for shut-in pressures, reservoir pore volume, and storage gas properties. These calculations are then graphed and trends are developed. Evaluating trends in inventory variance can be enhanced by use of a technique, described here, that

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