Challanging Question for all Reservoir Engineer

[zaheer.jamali]

Gas condensate reservoir

4 BHP survey were conducted
+13000
+12000
+11000

the above bhp survey content water gradient with oil and gas.

but we conducted a BHP survey two days before
Reservoir pressure drop to 5000 and well is producing oil and water and gas
but in bhp survey there was no water gradient why ?well is producing WGR 200 and CGR 70 but all the pressure gradient were near 0.12 psi/ft

intial pressure were droped due to withdrawl but last 5000 pressure drop just 0.1 bcf

[darcyoil]

An abrupt drop in reservoir pressure? Please re-phrase the question

[brhm]

pls describe your observations in more detail.
It could well be
well completion problem,
condensate banking but I am not expert on that
I know some some fields in Pakistan where fracture mechanics changes after sometime and water starts moving in.
it is not an easy question.
What is the source of water? Do you know formation salinities?
and more importantly how long you have been producing this well? Are you just recovering your drilling losses and still on the cleaning phase?

[brhm]

pls describe your observations in more detail.
It could well be
well completion problem,
condensate banking but I am not expert on that
I know some some fields in Pakistan where fracture mechanics changes after sometime and water starts moving in.
it is not an easy question.
What is the source of water? Do you know formation salinities?
and more importantly how long you have been producing this well? Are you just recovering your drilling losses and still on the cleaning phase?

[zaheer.jamali]

yes there is completion problem and CGR has been droped from 100 to 50 it shows condensate banking (may be).
there is an abrupt drop in reservoir pressure from 10000 psi to 5000 psi.
we can do psp job, we dont have dst data due to high pressure temp and H2S dst was terminated.
there is restriction in tubing cant do PSP job. there is question mark on water source.