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Multiphase Flow Meter for emulsified crude oil Production

MIANCH

Chemical
Joined
Aug 8, 2002
Messages
172
Location
LY
Hi Als,
Can anyone explain for the application and accuracy of multiphase flow measurement for emulsified crude oil production fields.
Best Regards
 
Application - you can estimate the quantities of oil gas and water in a single pipe.

Accuracy - varies widely depending on the metering technique used, the ratio of oil / water / gas and the vendor claims. You often find that a certain meter or vendor is good for one ratio of components, but once you vary that by 30-40% the accuracy versus a separator gets more variable

Personally I don't think it gets much better than 10% and often a whole heap less in the field as the conditions vary so much, including how much slugging is going on.

An emulsified liquid phase would be difficult I suspect or need some sort of radioactive measurement device.

Best to do a trawl of the relevant vendor product data sheets and see how it matches your particular fluid.
 
As I review the literature, I’ve observed that the dielectric constant tends to vary frequently due to changes in conductivity and fluid density as well. This variability could significantly affect the accuracy of production flow measurements. I would appreciate hearing from field experts regarding their practical experiences. How have such variations impacted your measurement accuracy in real-world applications.
 
You're possibly in the wrong forum for that.

There is a Petroleum.set of forums allied more to field issues than plant issues
 
If this meter is only for 2 phase oil / water mix with minimal gas content, then a diff head meter may do the job, provided you have a flow weighted sampling device ( such as a Welker sampler ) which you can send to the plant lab for oil-water content determination. Then do a correction for the reading you've got from the head meter.

Multiphase meters in gas - oil - water mix application is a waste of money.
 
The issue of emulsion is the key question to ask the vendors.

Is it a stable emulsion?

How do you deal with it at the processing plant?
 
emulsion is stable, I collected sample and now even pass 30 hrs, still no separation occurred yet.
 

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