US 11,754,734 B2
Placing wells in a hydrocarbon field based on seismic attributes and quality indicators
Abdullah Alwusaibie, Dammam (SA); and Ali Almahozi, Al Qatif (SA)
Assigned to Saudi Arabian Oil Company, Dhahran (SA)
Filed by Saudi Arabian Oil Company, Dhahran (SA)
Filed on Jun. 15, 2020, as Appl. No. 16/901,833.
Prior Publication US 2021/0389488 A1, Dec. 16, 2021
Int. Cl. G01V 1/30 (2006.01); E21B 49/00 (2006.01); E21B 49/08 (2006.01); G01V 1/104 (2006.01); G01V 1/18 (2006.01); G01V 1/34 (2006.01)
CPC G01V 1/306 (2013.01) [E21B 49/00 (2013.01); E21B 49/087 (2013.01); G01V 1/104 (2013.01); G01V 1/181 (2013.01); G01V 1/345 (2013.01); G01V 2210/1212 (2013.01); G01V 2210/144 (2013.01); G01V 2210/6226 (2013.01); G01V 2210/642 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A method of placing wells in a hydrocarbon field based on seismic attributes and quality indicators associated with a subterranean formation of the hydrocarbon field, the method comprising:
generating seismic data representing the subterranean formation;
receiving seismic attributes representing the subterranean formation;
receiving seismic data quality indicators;
generating cutoffs for each seismic attribute and seismic data quality indicator;
assigning a weight to each seismic attribute and seismic data quality indicator;
aggregating the weighted seismic attributes and data quality indicators for each location in the hydrocarbon field;
assigning a risk ranking based on the weighted seismic attributes and data quality indicators associated with each location in the hydrocarbon field based on the cutoffs;
generating a map with each location on a surface of the subterranean formation being color-coded based on its assigned risk ranking; and
drilling at least one location whose risk ranking is in a lowest category of risk rankings;
wherein generating cutoffs comprises performing a feasibility analysis establishing a relationship between changes of values of a seismic attribute with respect to changes of a geological property of the subterranean formation; and
wherein assigning the risk ranking based on the cutoffs comprises removing seismic data that falls outside the cutoffs.