Decline curve analysis

[dhiaa12]

Hello members i have question

General equation of decline curve is qt=qi/(1+bDit)1/b
So when the decline is exponential then b=0 ...my question is how the equation is going to be qt=qi exp-dt

When i subsitute b=0 i dont get the above equation!

[nmtruong93]

Dear Dhiaa12,

You could not substitute that.

You can refer to folow file.

Best regards
Truong

[FANARCO]

Thanx Truong,,

I spent many times to answer look into this quiz.

[nmtruong93]

Dear Fanarco & Dhiaa 12,

Production Analysis is topic in my honours project and my thesis. I have researched some methods in PA such as: DCA, Fetkovich, Agarwal - Gardner, Blasingame, Flowing Material Balance.

If anyone have questions about PA feel free to ask. I really would like to share my experience about that. I am not sure I can answer right, but we can discuss each other more and more.

I am sorry, my English not well

Thank you and best regards,
Trường

[FANARCO]

Dear Fanarco & Dhiaa 12,

Production Analysis is topic in my honours project and my thesis. I have researched some methods in PA such as: DCA, Fetkovich, Agarwal - Gardner, Blasingame, Flowing Material Balance.

If anyone have questions about PA feel free to ask. I really would like to share my experience about that. I am not sure I can answer right, but we can discuss each other more and more.

I am sorry, my English not well

Thank you and best regards,
Trường

Great,,

What is "Flowing Material Balance"

[jack]

does anybody has decline curve analysis in spreadsheet.it will be useful to many reservoir engineers.
I am interested in modified decline curve analysis

[FANARCO]

does anybody has decline curve analysis in spreadsheet.it will be useful to many reservoir engineers.
I am interested in modified decline curve analysis

What is modified DCA

[jack]

sorry it should be modified hyperbolic decline analysis
jack

[jack]

exponential decline gives conservative figure of reserves whereas hyperbolic gives reserves on higher side.Modified hyperbolic is in between two and nearer to realistic reserve estimates.There are software/programs,spreadsheet for modified hyperbolic decline curve analysis.I am looking for one
regrads
jack

[FANARCO]

Just provide me with the equation then i can create the sheet for you

[jack]

fanarco can you give me you your private e-mail as i am unable to attach excel file.In modified hyperbolic decline curve analysis we calculate Di,Dlim and b
regards
negijay@yahoo.com

[FANARCO]

mohamedgameel@hotmail.com

[petro]

Hello,

Could someone share how can we calculate Dlim, the decline rate at which the modrel switches from Hyperbolic to Exponential model.

I need sort of equation that can predict (estimate) Dlim.

Thank you!