Convert Annual Decline Rate Equation to Monthly

[djwall1]

Hi There

I have yearly production numbers from an oil and gas type curve from which I have "generated" (using an excel chart) an equation that defines the % decline per annum
=> y = 0.8489x^-0.964 (graphic attached).

y = decline
x = years

Sample data
x y

1	0.800
2	0.433311
3	0.297654
4	0.226736
5	0.18312
6	0.153582
7	0.132251
8	0.116123
9	0.103502
10	0.093355

What I am hoping to do is convert this to an equation that can define the decline on a monthly basis - having some issues though..

Any help appreciated.

Dave

 

[Deleted member 4993]

Hi There

I have yearly production numbers from an oil and gas type curve from which I have "generated" (using an excel chart) an equation that defines the % decline per annum
=> y = 0.8489x^-0.964 (graphic attached).

y = decline
x = years

Sample data
x y

1	0.800
2	0.433311
3	0.297654
4	0.226736
5	0.18312
6	0.153582
7	0.132251
8	0.116123
9	0.103502
10	0.093355

What I am hoping to do is convert this to an equation that can define the decline on a monthly basis - having some issues though..

Any help appreciated.

Dave

What are your thoughts?

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[stapel]

I have yearly production numbers from an oil and gas type curve from which I have "generated" (using an excel chart) an equation that defines the % decline per annum

=> y = 0.8489x^-0.964 (graphic attached).

y = decline
x = years

Is "decline" measured as year-on-year, or with respect to come fixed point?

Sample	data
x	y
1	0.800000
2	0.433311
3	0.297654
4	0.226736
5	0.183120
6	0.153582
7	0.132251
8	0.116123
9	0.103502
10	0.093355

What I am hoping to do is convert this to an equation that can define the decline on a monthly basis - having some issues though.

What are the "issues" that you're "having"?

When you reply, please include a clear listing of your thoughts and efforts so far. Thank you!