Averaging PVT data

[dipak_m]

I have a reservoir where 3 sets of PVT data are availabe. These 3 data are different regarding FVF, GOR, Pb etc. How I pick up the real data. If all data are OK, how I average these data to use my simulation model?
Thanks

[cappy]

I would advice you liase with the service company that carry out the PVT analysis to tell you which of the results is more reasonable as it is unlikely to have three different PVT for the same reservoir, beside if you average it, you are unlikely to get a good analysis most expecially if the PVT data are not within the same range, there is no way you can average it otherwise you look for an offset well that produce from the same reservoir, and match it. This I believed will give you a better analysis than averaging all the three PVT Data, expecially if they are not within the same range.

[dipak_m]

thanks

[ahmedm]

you do have same oil in your reservoir assuming no compartments ... if it does make difference

from my experience we had two sets of PVT data
we did normalize them base on the values at Pb
what you can do lets say Bo as function of pressure you plot all of the three samples as a function of pressure
then you divide the values of Bo by the Boi so you'll have the values to max of 1 (will be Bob if Pi=Pb, saturated)
then you can make a trend goes throguh all data then get the equation then you can multiply the values comes out from the function
by the Boi or Bob to get the corresponding pressure point

hope it helps ... to simplify ... sometimes it is a lovely paint to keep

all the best

[dipak_m]

Thanks Ahmedm. I will try