Gas initially in place

'''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).<ref name="PRMS2011">{{cite book |last1=SPE |title=Guidelines for Application of the Petroleum Resources Management System |date=2011 |publisher=Society of Petroleum Engineers |pages=222}}</ref>

''Gas Initially In Place = Gross Rock Volume * Net/Gross * Porosity * average initial Gas Saturation / Formation Volume Factor''<ref>{{cite web |last1=Dutton |first1=John A. |title=5.2: Estimation of Original Gas In-Place, OGIP, Using the Volumetric Method |url=https://www.e-education.psu.edu/png301/node/538 |website=e-Education Institute |publisher=PennState College of Earth and Mineral Sciences |access-date=26 July 2022}}</ref>

==References== {{Reflist}}

{{Petroleum industry}}

Category:Petroleum production Category:Petroleum economics

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