US 11,668,182 B1
Determining sweet spots and ranking of a basin
Mohammed Boudjatit, El Kennar (DZ); Ihab S. Mahmoud Aly, Dhahran (SA); and Mustafa A. Basri, Dhahran (SA)
Assigned to Saudi Arabian Oil Company, Dhahran (SA)
Filed by Saudi Arabian Oil Company, Dhahran (SA)
Filed on Nov. 24, 2021, as Appl. No. 17/535,211.
Int. Cl. E21B 47/003 (2012.01); E21B 47/10 (2012.01)
CPC E21B 47/003 (2020.05) [E21B 47/10 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for determining sweet spots in a subterranean formation, the method comprising:
drilling a plurality of wellbores in the subterranean formation using a drill tool;
measuring at least a permeability and a fluid viscosity of each of the plurality of wellbores by lowering a logging tool in each of the plurality of wellbores to collect measurements using the logging tool;
generating petrophysical logs of the plurality of wellbores based on at least the permeability and the fluid viscosity of each of the plurality of wellbores;
calculating a reservoir quality index parameter for each wellbore of the plurality of wellbores based on the permeability and the fluid viscosity of each respective wellbore from the petrophysical logs;
creating a reservoir quality index map using the petrophysical logs;
calculating a linear flow index parameter for each wellbore of the plurality of wellbores based on production data provided by the petrophysical logs;
correlating the reservoir quality index parameter and the linear flow index parameter for each wellbore of the plurality of wellbores to locate sweet spots; and
ranking a basin based on the located sweet spots and the correlated parameters.