Original Gas in Place : OGP or OGIP, the entire volume of gas contained in a reservoir, whether or not it is currently recoverable with state of the art technology or ability to produce
George E. King Engineering, 5000 Oilfield Terms: A Glossary of Petroleum Engineering Terms, Abbreviations and Acronyms, US 2010. http://gekengineering.com/Downloads/Free_Downloads /Glossary_of_Petroleum_Engineering_Terms_25_August _2010.pdf, (Oil - Amer) {593}