Volume Expansivity 1

[kpj]

I have an oilfield problem where I have trapped pressure between two concentric strings - the fluid is diesel. I need to calculate the pressure increase due to a 20 deg C increase in temperature.

I'm a bit rusty on equations of state and other thermodynamic principles but it should be easy for the expert.

Pressure of 200 psi trapped in 5000 ft of 9 5/8'' x 13 3/8'' annular space. Original temperature is 20 deg C. This temperature is increased to 40 deg C without any bleed off facility. Ignoring the deformation effects on the steel casing what is the pressure increase? I assume you use volume expansivity & isothermal compressivity coeffcients though cannot find values. Thats as far as I got!

Regards
kpj

 

[MortenA]

Look in the FAQ section. I have posted one on the (frequently re-occuring) question.

Best Regards

Morten

 

[kpj]

I've been looking through texts all week for this explaination (without getting into partial differentials).

Thanks for the pointer - I'll go home from work tonight a happy man.