US 12,378,881 B2
Method for determining rock matrix and fracture permeability by using poroelastodynamics and density averaging schemes
Chao Liu, Brookshire, TX (US); Vladimir Kazei, Houston, TX (US); Dung T. Phan, Brookshire, TX (US); and Younane N. Abousleiman, Norman, OK (US)
Assigned to SAUDI ARABIAN OIL COMPANY, Dhahran (SA)
Filed by ARAMCO SERVICES COMPANY, Houston, TX (US)
Filed on May 26, 2022, as Appl. No. 17/804,273.
Prior Publication US 2023/0383648 A1, Nov. 30, 2023
Int. Cl. E21B 49/08 (2006.01); E21B 49/00 (2006.01); G01N 33/24 (2006.01); G01V 1/30 (2006.01)
CPC E21B 49/088 (2013.01) [E21B 49/005 (2013.01); G01N 33/241 (2013.01); G01V 1/306 (2013.01); E21B 2200/20 (2020.05)] 12 Claims
OG exemplary drawing
 
1. A method comprising:
obtaining a petrophysical characterization of a formation sample;
measuring a first elastic wave velocity of the formation sample at a first frequency and measuring a second elastic wave velocity of the formation sample at a second frequency, wherein the first frequency is lower than the second frequency;
calculating, based on the petrophysical characterization, an average rock matrix density and an average porosity of the formation sample;
determining a first set of calculated elastic wave velocities at the first frequency over a range of candidate rock matrix permeabilities using the average rock matrix density and the average porosity;
determining a second set of calculated elastic wave velocities at the second frequency over a range of candidate fracture permeabilities using the average rock matrix density and the average porosity;
determining a rock matrix permeability based on the first set of calculated elastic wave velocities, the range of candidate rock matrix permeabilities, and the first elastic wave velocity;
determining a fracture permeability based on the second set of calculated elastic wave velocities, the range of candidate fracture permeabilities, and the second elastic wave velocity; and
performing a reservoir fluid flow simulation based on at least one of the rock matrix permeability or the fracture permeability;
determining a wellbore path based on the reservoir fluid flow simulation; and
drilling, using a drilling system, a wellbore guided by the wellbore path.