Measurement of 3 Phase Flow
Measurement of 3 Phase Flow
(OP)
Production (Water, H/C Liquid and Gas) from a well is to be measured; a three phase metering system is one possibility but due to complications it is at low priority. The other possibility I am looking at is that the gas be separated prior to metering skid by installing a riser on the production line, as indicated in the attached sketch. The riser is then be Tied – in to the production separator outlet. In this line up the liquid will follow the normal path (through manifold) to separator and gas through riser. Further to stop the liquid carry over a liquid trap can be installed on the gas riser before gas metering. I would like to know if someone has used this option. I will appreciate your comments and suggestions.





RE: Measurement of 3 Phase Flow
RE: Measurement of 3 Phase Flow
Thanks for your response, I agree to your point that it will take ther least resistance path. This question is posted to gain the knowledge about how to balance the split flow for metering purpose.
Following are the reasons which is restricting us not to flow the 3 phase through normal path. a) The cost of multiphase meter, b) accuracy, c)maintenance of the meter, d) variable the (GOR) gas to oil ratio d) the meter is highly sensitive, e) the driving source of the meter is radioactive.
RE: Measurement of 3 Phase Flow
Or how about this http:
RE: Measurement of 3 Phase Flow
It is being measure after separator but this measuremnt is for the entire field and not for a single well. There is a test separator as well and routinely each well is checked as well. The production would like to reconcile daily production figure with daily production from each well that is why metering on each well production line is required.
RE: Measurement of 3 Phase Flow
These guys has one:
htt
and these
http://www.phasedynamics.com/ccm.html
But im sure its the one i once looked at so theres propably more out there.
These guys have a very differen approach that i find interesting:
http://www.multiphase.com/products/p_vmetering.htm
They take already known measurements at various points in the process and uses them to calculate flow but chosing the one that give the best result based on operating conditions.
E.g. when flowing wellhead pressure is high dP across the choke is used and when flowing wellhead pressure is low bottom hole pressure and flowing wellhead pressure is used - combined with appropriate flow models.
Best regards
Morten
RE: Measurement of 3 Phase Flow
Std_m3/hr x (Pstd/Pact) x (Tstd/Tact)
But on using for thesame model I got a totally different actual flow rate, but at standard conditions they seem similar. Can anybody please tell me how to go about such problem, 'cos from what I noticed in the HYSYS model, some of the gas has dissolved in the HC-crude, making the volume to be smaller, thereby increasing the volume of the HC crude
Can anybody in the house give me an acceptable way of calculating gas flow from a 3-phase separator, that can be used as verification for gas meter meter rading at different inlet flow rates, if you have GOR, watercut HC fluid daily production rate
Will be very happy for any contribution.......thanks
RE: Measurement of 3 Phase Flow
Consider the Agar multi-phase flow meters. I have never bought one but keep Agar in mind if ever needed.
RE: Measurement of 3 Phase Flow
RE: Measurement of 3 Phase Flow
narj
RE: Measurement of 3 Phase Flow
The way you are doing seems to be normal however, the crude will have high RVP as the gases will dissolve in crude as the pressure goes high.May be you find or draw a graph of your crude solubility from hysis simulataion at different pressures or get a lab draw you a graph based on the crude RVP and then add that value in your model
RE: Measurement of 3 Phase Flow
thanks I will get the lab, to provide info on the crude solubilty graph, 'cos i need to get to the bottom of this.......thanks