By The Petroleum Society of the Canadian Institute of Mining, Metallurgy and Petroleum
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Extra resources for Determination of Oil and Gas Reserves
1-2. Each term is defined in this chapter. 1-2 and its related definitions. 1-1 4 Resources sub-classifications. Reserves ownership is also discussed in this chapter. 2 RESOURCES Resources are the total quantities of oil and gas and related substances that are estimated, at a particular time, to be contained in, or that have been produced from, known accumulations, plus those estimated quantities in accumulations yet to be discovered. 1-1), are those quantities of oil and gas and related substances that are estimated, at a particular time, to be initially contained in known accumulations that have been penetrated by a wellbore.
It is valuable to understand the production recovery . mechanism of the formation (or the same formations in the area) and the various characteristics of the well (net pay, permeability, and zone of completion). Also, each specific interpretation is a function of the experience, integrity and objectivity of the individual doing the evaluation. Determining reserves from historical graphs of production data that exhibit strong consistent decline characteristics should be straightforward. 3-9, proved reserves only would be assigned.
For most reservoirs, the composition of the produced gas will not significantly change with time. For these reservoirs, the only test of recoverability of NGLs relates to whether they will be recovered as liquids or remain in the natural gas. This is also a second test for those reservoirs previously mentioned where the NGL content of the produced gas will change with time. The first criterion in terms of their classification as reserves is that NGLs can only be categorized as proved ifthe raw gas from which they are to be removed will, after processing, result in marketable gas that is categorized as remaining proved reserves.
Determination of Oil and Gas Reserves by The Petroleum Society of the Canadian Institute of Mining, Metallurgy and Petroleum