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.

气藏物质平衡方程是气藏工程的重要方法，可以确定气藏的原始地质储量和可采储量，也可以判断气藏的驱动类型，并预测气藏的开发动态。

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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.

采用直线回归的试算法确定气藏合理地质参数的范围，介绍了非线性最优化天然气储量的计算方法。

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