Gas initially in place explained

Gas initially in place (GIIP) or original gas in place (OGIP) denote the total estimated quantity (volume) of natural gas contained in a "subsurface" asset prior to extraction (production).[1]

Gas Initially In Place = Gross Rock Volume * Net/Gross * Porosity * average initial Gas Saturation / Formation Volume Factor[2]

Notes and References

  1. Book: SPE . Guidelines for Application of the Petroleum Resources Management System . 2011 . Society of Petroleum Engineers . 222.
  2. Web site: Dutton . John A. . 5.2: Estimation of Original Gas In-Place, OGIP, Using the Volumetric Method . e-Education Institute . PennState College of Earth and Mineral Sciences . 26 July 2022.

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