During Oil & Gas production, crude oil flow from individual wells to manifolds, trunk lines, separators, dehydrators, and export lines, etc., before they reach processing facilities. Following challenges are encountered by an oil production company
Conventional flow meters deployed were ONLY designed for stage of process to control the movement of crude oil in the system.
As instrumentation ages and process conditions change, measurement errors and balancing discrepancies occur that ultimately impact efficiencies and cash flows.
Volumetric measurement of crude oils require compensation for pressure and temperature changes since it affects both density and viscosity
Presence of solid particles, sand and sour gas in crude oil
All of this leads to :-
Increase in Instrument maintenance frequency
Increase in Instrument calibration frequency
Frequent replacement of flow meters (Owing to change in process conditions)
Additional instrument requirements
Inaccurate measurement in hydrocarbon accounting
Increase in type of flow meter inventory
The client then opted for Clamp on type Ultrasonic Flow Meters as it provided solution to above issues:-
No maintenance requirement
Reduced instrument calibration
No early replacement of flow meters (Since these clamp on meters are suitable for wide variation of process parameters
Measurement was more accurate since these meters are immune to most of process changes
Minimum instrument inventory was required since clamp on meter is non wetted meter.
Volumetric correction owing to pressure and temperature fluctuations
The client replaced the clamp on meters everywhere in crude system where existing instrument performance had been deteriorated that too without any existing pipework modifications.
Client was able to do online volumetric correction by using these clamp on meters as they had inbuilt algorithms based on international standards to compensate for changes in densities and viscosities owing to fluctuations in pressure and temperature.
There was considerable amount of saving for the client since the operating expenditure OPEX came down by USD $100000 per month based on benefits derived by using clamp on meters.
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