The volume of gas in a reservoir before production. OGIP is the abbreviation of original gas-in-place.
开采以前天然气气藏里的天然气容量。OGIP是原始天然气地质储量的缩写。
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The material balance equation for gas reservoir has been used to determine reserves and OGIP of gas reservoir, judge its driving type and predict its production performance.
Trial-and-error method of the linear regression is introduced to determine the reasonable range of geological parameters. And the nonlinear least square method to calculate OGIP.