US 11,859,484 B2
Enhanced recovery method for stratified fractured reservoirs
Abdulaziz S. Al-Qasim, Dammam (SA); Subhash C. Ayirala, Dhahran (SA); and Dong Kyu Cha, Dhahran (SA)
Assigned to SAUDI ARABIAN OIL COMPANY, Dhahran (SA)
Filed by SAUDI ARABIAN OIL COMPANY, Dhahran (SA)
Filed on Feb. 17, 2022, as Appl. No. 17/651,538.
Prior Publication US 2023/0258065 A1, Aug. 17, 2023
Int. Cl. E21B 43/14 (2006.01); E21B 43/25 (2006.01); E21B 43/267 (2006.01); E21B 43/00 (2006.01)
CPC E21B 43/267 (2013.01) [E21B 43/003 (2013.01); E21B 43/14 (2013.01); E21B 43/25 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A method for enhancing productivity of a stratified subterranean wellbore, the method comprising:
introducing a mixture comprising water and a first set of nanoparticles to a first target zone of the stratified subterranean wellbore, where the first set of nanoparticles is reactive to high frequency acoustic waves and has a size in a range of about 10 to about 100 nm, and where the first target zone is located in a high permeability layer of the stratified subterranean wellbore;
providing a first stimulation to the first set of nanoparticles to promote a reacting of the first set of nanoparticles, where the first stimulation comprises acoustic waves having a frequency range of 1 kHz to about 10 kHz;
introducing water to the first target zone;
introducing a mixture comprising water and a second set of nanoparticles to a second target zone of the stratified subterranean wellbore, where the second set of nanoparticles has a size in a range of about 1 to about 10 nm, and where the second target zone is located in a medium permeability layer of the stratified subterranean wellbore;
providing a second stimulation to the second set of nanoparticles to promote a reacting of the second set of nanoparticles, where the second stimulation comprises acoustic waves having a frequency range of 100 Hz to about 1 kHz; and
introducing water to the second target zone.