TY - BOOK AU - Bankston, G.C. TI - Estimating and defining underground hydrocarbon reserves. En : Seminar on reserves and productive capacity U1 - 333.823 PY - 1975/// CY - Washington PB - API KW - HIDROCARBUROS KW - RESERVAS DEL PETROLEO N1 - 05232 N2 - The paper reviews some problems associated with estimating and defining underground petroleum reserves. First, it reviews something of the nature of petroleum reserves. Principally in the category of the inexact character of the estimates themselves. Then, it covers the different types of petroleum activities for which reserve estimates are prepared in order to understand the diverse purposes of the estimates ER -