Automatic Quantitative Measurement

Gross volumes frequently must be adjusted by quantitative measurements such as water content, temperature, pressure, and density before net volumes at standard conditions can be determined. Technical Data used in the field explained in diploma in petroleum technology. Several of these quantitative ammeters are necessary for automation of lease operations.

There are three types of quantitative (volume) devices commonly used for automatic liquid measurement on the lease: positive-volume meters, positive-displacement meters, and inferential meters. Positive-volume meters are essentially extensions of tank measurement with automatic “filling” and “running” functions. Positive displacement meters “trap” a fixed volume of liquid within moving elements of the meter. Inferential meters measure liquid by detecting some property of the moving stream that is a basis for determining volume indirectly. Some more details of diploma in petroleum technology are as under.

Positive-Volume Meters. Positive-volume meters operate on a “fill” and “dump” cycle rather than being a continuous operation. This type meter is essentially the automatic gauging of a tank by using level controls to move a fixed volume through the tank on each complete cycle. The volume that is “dumped” or measured is related to the displacement volume in the meter between the high “fill” point and the low “dump” point in the meter. Various types of level controls are used to control the fluid levels in the meter. Each complete “fill” and “dump” cycle is registered on a counter as a basis for total volume determination. Since the positive-volume meter is cyclic with a separate “fill” and “dump” period, allowance for handling produced volumes while the meter is in the “dump” cycle must be made. Continuous operation is possible by having a pair of meters that are sequenced to have alternating cycles. This essentially requires duplication of facilities and some increased complexity in the controls. A more common arrangement is to provide surge volume capacity upstream of a single meter.

Volume-type dump tanks or meters have been built in a variety of shapes and volumes. Capacities per dump have ranged from less than V bbl to several hundred barrels.

The metering chamber may be in a stand-alone vessel or it may be an integral portion of a vessel such as a separator or heater treater. The positive-volume meter is not as compatible with qualitative measurement as the positive-displacement and inferential meters since the volume measurement cannot be separated easily into smaller increments to drive sampling and other qualitative measurement devices. TSK Training for Skills and Knowledge is the best institute in Rawalpindi Islamabad for Pakistani Students who wants to join diploma in petroleum engineering,

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