Difference between revisions of "Decline Curve Analysis"

Revision as of 15:32, 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]	: $q(t) = \frac{q_i}{(1+b\ D_i\ t)^{1/b}}$	: $Q = \frac{q^b_i}{D_i\ (1-b)} (q^{1-b}_i-q(t)^{1-b})$
Gas-oil ratio	Velarde	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.

↑ 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 8: / Line 8: @@
 == Math & Physics ==
-General form equation <ref name = DDA/>:
-:<math>q(t) = \frac{q_i}{(1+b\ D_i\ t)^{1/b}}</math>
-:<math> Q = \frac{q^b_i}{D_i\ (1-b)} (q^{1-b}_i-q(t)^{1-b})</math>
+<table width="100%" border="1" cellpadding="3" cellspacing="1">
+<tr>
+<th>Note</th>
+<th>Rate</th>
+<th>Cumulative</th>
+</tr>
+<tr>
+<td>General form equation <ref name = DDA/></td>
+<td>:<math>q(t) = \frac{q_i}{(1+b\ D_i\ t)^{1/b}}</math></td>
+<td>:<math> Q = \frac{q^b_i}{D_i\ (1-b)} (q^{1-b}_i-q(t)^{1-b})</math></td>
+</tr>
+<tr>
+<td>Gas-oil ratio</td>
+<td>[[Velarde correlation|Velarde]]</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>
+</tr>
+</table>
 == References ==