Difference between revisions of "Decline Curve Analysis"

Revision as of 15:34, 26 October 2017

Decline Curve Analysis DCA is an empirical method for rate decline analysis and rate forecasting published by Arps in 1945 ^[1].

DCA is applied for Wells and Reservoirs production forecasting.

Note	Rate	Cumulative
General form equation ^[2]	$q(t) = \frac{q_i}{(1+b\ D_i\ t)^{1/b}}$	$Q = \frac{q^b_i}{D_i\ (1-b)} (q^{1-b}_i-q(t)^{1-b})$
Exponential decline, b = 0	$q(t) = {q_i}^{-D_i\ t}$	$q(t) = {q_i}^{-D_i\ t}$

↑ Arps, J. J. (1945). "Analysis of Decline Curves". Transactions of the AIME. Society of Petroleum Engineers. 160 (01).
↑ "KAPPA Dynamic Data Analysis (DDA) book".

@@ Line 22: / Line 22: @@
 <tr>
-<td>Gas-oil ratio</td>
+<td>Exponential decline, b = 0</td>
-<td>[[Velarde correlation|Velarde]]</td>
+<td><math>q(t) = {q_i}^{-D_i\ t}</math></td>
-<td>Velarde, J., Blasingame, T.A., and McCain Jr., W.D. 1997. Correlation of Black Oil Properties At Pressures Below Bubble Point Pressure - A New Approach. Presented at the Annual Technical Meeting of CIM, Calgary, Alberta, 8–11 June. PETSOC-97-93.</td>
+<td><math>q(t) = {q_i}^{-D_i\ t}</math></td>
 </tr>