[12] Patent
[11] Patent No.:GC0013792  
[45] Date of Publishing the Grant of the Patent: 9/Sep /2025                102/2025  		 Number of the Decision to Grant the Patent:2025/203334
Date of the Decision to Grant the Patent:14/Aug/2025

[21] Application No.:GC 2019-37218

[22] Filing Date:18/3/2019

[30] Priority:

[33] State [32] Priority date [31] Priority No.
US
US
19/3/2018
15/3/2019
 US 62/644,807
US 16/354,510

[72] Inventors:1- Lirio Quintero،2- Henry Nguyen،3- Oleksandr V. Kuzentsov

[73] Owner: Baker Hughes, a GE company, LLC, 17021 Aldine Westfield,Texas 77073 , Houston, USA

[74] Agent: Saba & Co. T.M.P

  

 

   

[51]IPC:
Int. Cl.: C09K 8/60; E21B 41/00, 43/20, 49/00 (2006.01)

[56] Cited Documents:

-WO 2011149789 A (John C. Hutchison Patrick Shane Wolfe) 01 December 2011
-US 20170319663 A1 (Tal Atarot Michal Olshansky) 09 November 2017
-US 20160319663 A1 (Sanja Natali) 3 November 2016
-EP 3000862 A1 (Pim MUL Hidde Cornelis Willem ROMMENS) 30 March 2016
-NEGIN, CHEGENIZADEH et al., Most common surfactants employed in chemical enhanced oil recovery 2017  
Examiner: Eng. Sattam M.AlMutairi

[54] SELECTION OF OPTIMAL SURFACTANT BLENDS FOR WATERFLOOD ENHANCEMENT
[57] Abstract: A method of providing an optimal surfactant blend to improve waterflood efficiency comprises selecting candidate surfactant blends based on one or more of the following: a reservoir condition; information of a crude oil; information of an injection fluid; or information of a formation fluid, each candidate surfactant blends comprising at least two surfactants, one surfactant having a higher relative affinity for the crude oil than for the injection fluid and at least one surfactant having a higher affinity for the injection fluid than for the crude oil; evaluating phase behavior of the candidate surfactant blends to select surfactant blends that form a Winsor III system with the crude oil and the injection fluid at a reservoir temperature; and evaluating the selected surfactant blends in a porous media to select an optimal surfactant blend which achieves at least an additional 10% crude oil recovery after waterflood.
No. of claims: 12     No. of figures: 6


 

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