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Surface production equipment (view source)
Revision as of 18:50, 14 January 2014
, 18:50, 14 January 2014→Tank batteries and metering
==Tank batteries and metering==
==Tank batteries and metering==
[[file:surface-production-equipment_fig6.png|thumb|{{figure number|6}}Orifice meter for gas measurement.]]
Tanks must be provided to hold both oil and water for shipping or disposal. Usually, at least two oil tanks are used, one for shipping and one for filling. The volume of oil being shipped is sometimes determined by simply measuring the height of the fluid in the tank, or “strapping” the tank. Many of the more modern production facilities have lease automatic custody transfer (LACT) units installed. These stations continuously measure the flow into the shipping point and periodically sample the product being shipped so that oil gravity, temperature, pressure, and water content are known. The metering in this case is done with a positive displacement meter.
Tanks must be provided to hold both oil and water for shipping or disposal. Usually, at least two oil tanks are used, one for shipping and one for filling. The volume of oil being shipped is sometimes determined by simply measuring the height of the fluid in the tank, or “strapping” the tank. Many of the more modern production facilities have lease automatic custody transfer (LACT) units installed. These stations continuously measure the flow into the shipping point and periodically sample the product being shipped so that oil gravity, temperature, pressure, and water content are known. The metering in this case is done with a positive displacement meter.
The measurement of gas is usually done with an orifice meter. Figure 6 shows such an installation. For a given meter installation, the gas flow rate depends on the pressure on both sides of the orifice and the temperature of the gas. These pressures and temperatures are normally recorded on a circular chart. This chart is later used to determine the total gas flow over a particular time period. Many installations today have digital flow calculating and recording devices installed at the meter. These installations have proven to be accurate, and they provide for the telemetering of the flow information from a remote installation.
The measurement of gas is usually done with an orifice meter. [[:file:surface-production-equipment_fig6.png|Figure 6]] shows such an installation. For a given meter installation, the gas flow rate depends on the pressure on both sides of the orifice and the temperature of the gas. These pressures and temperatures are normally recorded on a circular chart. This chart is later used to determine the total gas flow over a particular time period. Many installations today have digital flow calculating and recording devices installed at the meter. These installations have proven to be accurate, and they provide for the telemetering of the flow information from a remote installation.
==See also==
==See also==