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Title: Gauging, Testing And Running Of Lease Tanks
Author: Jane Williams
Source: 2008 International School of Hydrocarbon Measurement
Year Published: 2008
Abstract: Many production sites do not have metering facilities for custody transfer. Metering facilities require additional capital expenditures but minimize the labor costs over the life of the lease. If metering is not available at the field location the custody transfer measurement is generally performed by manual tank gauging. In this case, after gauging the tank can be emptied into a truck or into a pipeline. Another method which is used occasionally is to have a meter on the truck which serves as the custody transfer. However, the majority of locations which do not have a LACT (Lease Automatic Custody Transfer) Unit utilize the tank gauge as the means of custody transfer. The procedure for gauging of tanks is covered by API (American Petroleum Institute) MPMS (Manual of Petroleum Measurement Standards) Chapter 3. Verification of the equipment utilized in the gauging process against certified test standards which are traceable to the NIST is now required.