Printable View
alslam Alikom
I have a well drilled in new formation and have logs data, porosity and permeability data from core analysis
there are two other formations above and below this new one and they are already producing
how can I get information about current reservoir pressure
and I want to calculate overburden pressure to applied in the lab to measure phi and K at OBP(overburden pressure)
please help if you know and thanks in advance
If you want the pressures only for the purpose of core property meassurements then you can use 20kPa/m for overburden and 10kPa/m for pore presure. The resulting net overburden will differ very little from actual numbers and results will be the same for most of the rock samples. This aproach is not good for anomalous gelogical areas and/or unconsolidated samples.
If you want the pressures for production analysis or similar then the formation pressure has to be measured and the overburden has to be calculated from logs (density log)
[QUOTE=Yengineer;268854]If you want the pressures only for the purpose of core property meassurements then you can use 20kPa/m for overburden and 10kPa/m for pore presure. The resulting net overburden will differ very little from actual numbers and results will be the same for most of the rock samples. This aproach is not good for anomalous gelogical areas and/or unconsolidated samples.
If you want the presures for production analysis or similar then the formation pressure has to be measured and the overburden has to be calculated from logs (density log)[/QUOTE]
first thanks a lot for your reply
seconded what is the meaning of anomalous geological areas and if you do not mind how can I calculate overburden from density log in details
thanks brother
Anomalous geological areas are some geological areas were the nature has decied to play tricks on you. The nature f.e. at some point in time has uplifted the whole reservoir and then the pore pressure is higher then it should be. But then again you know those tricks, you are a petroleum engineer, right?
[QUOTE=Yengineer;268862]Anomalous geological areas are some geological areas were the nature has decied to play tricks on you. The nature f.e. at some point in time has uplifted the whole reservoir and then the pore pressure is higher then it should be. But then again you know those tricks, you are a petroleum engineer, right?[/QUOTE]
ah ok I understand it now, yes I am a petroleum engineer
what about calculating overburden from density log?