US 11,655,410 B2
Silicon dioxide Janus nanosheets relative permeability modifier (RPM) for reducing subterranean formation water permeability in carbonate and sandstone formations
Jin Huang, Dhahran (SA); Feng Liang, Cypress, TX (US); and Wengang Li, Khobar (SA)
Assigned to Saudi Arabian Oil Company, Dhahran (SA)
Filed by Saudi Arabian Oil Company, Dhahran (SA)
Filed on Jan. 19, 2022, as Appl. No. 17/579,142.
Application 17/579,142 is a division of application No. 16/904,211, filed on Jun. 17, 2020, granted, now 11,261,368.
Prior Publication US 2022/0135864 A1, May 5, 2022
Int. Cl. C09K 8/516 (2006.01); C09K 8/502 (2006.01); C09K 8/506 (2006.01); E21B 43/16 (2006.01)
CPC C09K 8/516 (2013.01) [C09K 8/502 (2013.01); C09K 8/506 (2013.01); E21B 43/16 (2013.01); C09K 2208/10 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A method for reducing water permeability of a carbonate formation, comprising:
introducing a carrier fluid comprising a silicon oxide Janus nanosheet relatively permeability modifier (RPM) into the carbonate formation, the silicon oxide Janus nanosheet relatively permeability modifier (RPM) comprising:
a silicon oxide nanosheet having a first side and a second side, wherein the silicon oxide nanosheet has a thickness in the range of in the range of 24 nanometers (nm) to 95 nm,
a functional group bonded to the first side, the functional group selected from the group consisting of COOH, COO, OH, or O; and
an alkyl group linked to the second side, the alkyl group selected from the group consisting of a C8-C30 alkyl, wherein the alkyl group is bonded to the second side by an oxygen atom and the degree of hydrophobic alkyl functionality of the second side is in the range of 0.01 weight (wt) % to 40 wt %.
 
4. A method for reducing water permeability of a sandstone formation, comprising:
introducing a carrier fluid comprising a silicon oxide Janus nanosheet relatively permeability modifier (RPM) into the carbonate formation, the silicon oxide Janus nanosheet relatively permeability modifier (RPM) comprising:
a silicon oxide nanosheet having a first side and a second side,
a functional group bonded to the first side, the functional group selected from the group consisting of NH2 and an amine;
an alkyl group linked to the second side, the alkyl group selected from the group consisting of a C8-C30 alkyl.