US 11,719,844 B2
System and method for analyzing reservoir changes during production
Behrang Koushavand, Calgary (CA)
Assigned to Cenovus Energy Inc., Calgary (CA)
Filed by Husky Oil Operations Limited, Calgary (CA)
Filed on Sep. 15, 2020, as Appl. No. 17/21,596.
Claims priority of provisional application 62/901,044, filed on Sep. 16, 2019.
Prior Publication US 2021/0080607 A1, Mar. 18, 2021
Int. Cl. G01V 1/50 (2006.01); G06N 3/08 (2023.01); G01V 1/30 (2006.01)
CPC G01V 1/50 (2013.01) [G01V 1/308 (2013.01); G06N 3/08 (2013.01); G01V 2210/612 (2013.01)] 23 Claims
OG exemplary drawing
 
1. A method of analyzing reservoir changes during production to increase reservoir production efficiency, comprising:
obtaining a seismic baseline of a reservoir prior to the production;
acquiring at least one seismic monitor of the reservoir after the production has started;
aligning the at least one seismic monitor with the seismic baseline to correlate one or more geological features of the reservoir;
generating a 3D seismic volume of differences by subtracting the seismic baseline from the aligned at least one seismic monitor;
utilizing a sliding window to generate a plurality of 2D image slices from the 3D seismic volume of differences and a mask;
training an artificial neural network utilizing the plurality of 2D image slices to generate a prediction model that predicts the reservoir changes during the production of the reservoir based on the seismic baseline and observed differences;
using the prediction model generated by the artificial neural network to generate actionable data to increase the reservoir production efficiency; and
using the actionable data to alter production methods in order to increase the reservoir production efficiency.