# US 10,479,927 B2 · Treatment of kerogen in subterranean formations

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- Number: US 10,479,927 B2
- Document ID: US10479927B2
- Status: Granted
- Kind: B2
- Application number: 16/382,089
- Filed: 2019-04-11
- Published: 2019-08-29
- Granted: 2019-11-19
- Earliest claimed: 2015-09-03
- Assignees: Saudi Arabian Oil Company
- Applicants: Saudi Arabian Oil Company
- Inventors: Katherine Leigh Hull; Ghaithan A. Al-Muntasheri; Younane N. Abousleiman; David Jacobi
- Web page: https://patentgrep.com/patent/US10479927B2

## CPC

- C09K 8/58: Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
- C09K 8/032: {Inorganic additives}
- C09K 8/665: {containing inorganic compounds (proppants C09K8/80)}
- C09K 8/805: {Coated proppants}
- E21B 43/26: by forming crevices or fractures
- C09K 2208/26: Gel breakers other than bacteria or enzymes
- C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS

## Abstract

Provided in this disclosure, in part, are methods, compositions, and systems for degrading organic matter, such as kerogen, in a subterranean formation. Further, these methods, compositions, and systems allow for increased hydraulic fracturing efficiencies in subterranean formations, such as unconventional rock reservoirs. Also provided in this disclosure is a method of treating kerogen in a subterranean formation including placing in the subterranean formation a composition that includes a first oxidizer including a persulfate and a second oxidizer including a bromate.

## Claims

### Claim 1

A method of fracturing a subterranean formation penetrated by a wellbore, comprising:
specifying a concentration of a bromate in a composition correlative with an amount of kerogen to be treated in the subterranean formation and correlative with an amount of iron sulfide in the subterranean formation;
treating the kerogen in the subterranean formation with the composition comprising a first oxidizer comprising a persulfate and a second oxidizer comprising the bromate, wherein the persulfate has a concentration of about 0.00005 M to about 1.0 M in the composition and the bromate has a concentration of about 0.00005 M to about 0.20 M in the composition; and
fracturing the subterranean formation.