Well testing
Well testing
(OP)
1.Does anyone knows what is the best way or the most accurate way to test the production of an individual well?
2.What is the most accurate way to take the watercut percentage of an individual well?
wlka
2.What is the most accurate way to take the watercut percentage of an individual well?
wlka





RE: Well testing
A multiphase meter is probably the easiest way because you do not have to rely on quality of separation.
Depending on the type of flow ou have, viscosities, GVF, salinity changes in the water etc. there is a right multiphase flow meter for you.
It allows for well tests that can last as little as 20 minutes. Be warned that all MPFM's produce pressure drops and you have to make corrections due to the higher backpressure.
AF
RE: Well testing
Most wells (zones) in my area are water drive zones that are very pridictable using a modified Vogle correlation where the water is a stright line and the oil is Vogle (IPR.) For wells in this area the harder you pump them the lower the oil cut gets.
Any large service company like Slb, Baker, Weatherford etc. can do your testing for you.
Hope this helps.
David
RE: Well testing
to measure the accurate water cut, you could use the MultiPhase FlowMeter, which is using radiation and conudctivity meter to know the amount of water contained in the oil produced. in the water, there are salts dissolved that make the water has a conductivity, which differ from oil measured. But the problem is, we need to continuously maesure the conductivity of standard water wasted from the WTU in our production sites and make it as reference for the water conduictivity in MPFM program.
RE: Well testing
RE: Well testing
You are suggesting to avoid coriolis flowmeter when the water cut is high and gas/ oil is not separated
what is the water cut above which it is categorized as high
Once a separator is installed to separate the oil/water and gas the coriolis flowmeter should not be a problem.
in onshore coriolis flowmeter is the preferred one as far as i am aware
RE: Well testing
If this is a situation where you can't have a test separator and the associated switching manifold, then the inline 3 phase meters are your best bet. They can be fairly accurate, given the right conditions and the ability to calibrate for those conditions.
RE: Well testing
The 3-phase meters are useless in TEOR heavy oil production.
A wellhead jar cut/jar test is only a snapshot. In my experience most wells on rod pump do not produce a nice even cut; rather, the flow is in crude and water slugs.
If you can provide some answers to the above questions I can steer you in the (generally) right direction. Pete
Thanks!
Pete
RE: Well testing
RE: Well testing
There are so many different ways to test wells and the "best" way is to tailor it to fit the individual well coditions. I agree with 74Elsinore, we could use more details on the well and its production types, even the area it is in.
kahalikk,
A 2 phase separator separates production into a liquid (water/oil) and gas streams. A 3 phase separator separates production into water, oil and gas streams. Sampling the water cut as you have mentioned can be fairly accurate in certain high rate instances but in low rate instances is generally inaccurate.
Cliff
RE: Well testing
AMI