US 11,754,518 B2
Methods and systems to determine tortuosity of rock and fluids in porous media
Andrea Valori, Al-Khobar (SA); Salah Mohammed Al-Ofi, Northern Khobar (SA); Wael Abdallah, Dhahran (SA); Marie Van Steene, As Sakhir (BH); Chengbing Liu, Dhahran (SA); and Shouxiang Ma, Dhahran (SA)
Assigned to SCHLUMBERGER TECHNOLOGY CORPORATION, Sugar Land, TX (US); and SAUDI ARABIAN OIL COMPANY, Dhahran (SA)
Appl. No. 17/429,711
Filed by Schlumberger Technology Corporation, Sugar Land, TX (US); and Saudi Arabian Oil Company, Dhahran (SA)
PCT Filed Feb. 11, 2020, PCT No. PCT/US2020/017689
§ 371(c)(1), (2) Date Aug. 10, 2021,
PCT Pub. No. WO2020/167783, PCT Pub. Date Aug. 20, 2020.
Claims priority of provisional application 62/803,902, filed on Feb. 11, 2019.
Prior Publication US 2022/0205937 A1, Jun. 30, 2022
Int. Cl. G01N 24/08 (2006.01); G01V 3/20 (2006.01); G01V 3/32 (2006.01); G01V 3/38 (2006.01)
CPC G01N 24/081 (2013.01) [G01V 3/20 (2013.01); G01V 3/32 (2013.01); G01V 3/38 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A method of characterizing tortuosity of a porous media, wherein the porous media is saturated with both a water phase and a hydrocarbon phase, comprising:
using results of at least one NMR measurement and at least one dielectric dispersion measurement performed on the porous media to determine data that characterizes tortuosity of a porous media and data that characterizes tortuosity of fluid phases in the porous media;
wherein the results of the at least one NMR measurement comprises Diffusion D-T2 data of the porous media;
analyzing a part of the Diffusion D-T2 data that is attributable to pores filled with water to determine an NMR-based water phase tortuosity;
determining a dielectric-based water phase tortuosity by inversion of the at least one dielectric dispersion measurement; and
using the dielectric-based water phase tortuosity as data that characterizes water phase tortuosity of the porous media and analyzing a part of the Diffusion D-T2 data that is attributable to pores filled with hydrocarbon to determine hydrocarbon phase tortuosity of the porous media.