Patent ID: 11866641
Assignee: KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS
Field: Basic materials chemistry (Chemistry)
Classification: CPC C | IPC C

Claim 0:
1. A method of fracking a subterranean geologic formation, comprising:
injecting an oil and gas well servicing fluid into an oil and gas well in the subterranean geologic formation,
wherein the injecting is at a pressure above the fracture point of the subterranean geologic formation;
wherein the oil and gas well servicing fluid comprises:
an aqueous base fluid; and
a surfactant of formula (I), wherein:
each of R1 and R2 are independently H or an optionally substituted C1 to C6 alkyl,
R3 and R4 are independently an optionally substituted C1 to C6 alkyl;
x is 6;
y is an integer in a range of from 7 to 10;
z is 6;
n is an integer in a range of from 3 to 4;
A is an anionic headgroup selected from the group consisting of, wherein the oil and gas well servicing fluid has a total dissolved solids content in a range of from 50,000 to 350,000 ppm,
wherein the surfactant is present in a range of from 0.045 to 2 wt. %, relative to a total weight of the oil and gas well servicing fluid,
wherein the surfactant has a number average molecular weight in a range of from 600 to 1200 g/mol, and
wherein, during the injecting, the surfactant has a concentration in a range of from 3×10−5 to 5×10−4 M.