# US 11,999,906 B2 · Method of hydraulic fracturing utilizing a hydraulic fracturing fluid with a single phase liquid proppant

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- Number: US 11,999,906 B2
- Document ID: US11999906B2
- Status: Granted
- Kind: B2
- Application number: 18/109,082
- Filed: 2023-02-13
- Published: 2023-06-22
- Granted: 2024-06-04
- Earliest claimed: 2018-10-25
- Assignees: CNPC USA Corporation; Beijing Huamei, Inc.; China National Petroleum Corporation
- Applicants: CNPC USA Corporation; Beijing Huamei, Inc.; China National Petroleum Corporation
- Inventors: Lijun Lin; Jiangshui Huang; Litao Bai; Stephanie Yu; Fuchen Liu; Congbin Yin; Wei Gong
- Web page: https://patentgrep.com/patent/US11999906B2

## CPC

- C09K 8/80: Compositions for reinforcing fractures, e.g. compositions of proppants used to keep the fractures open
- C09K 8/665: {containing inorganic compounds (proppants C09K8/80)}
- C09K 8/68: containing organic compounds
- C09K 8/685: {containing cross-linking agents}
- E21B 43/267: reinforcing fractures by propping
- C09K 2208/10: Nanoparticle-containing well treatment fluids
- 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

A hydraulic fracture fluid is provided. The fluid can include a liquid solvent, one or more surfactants, a proppant-forming compound, and one or more curing agents. The liquid reacts to form proppant in-situ under downhole conditions.

## Claims

### Claim 1

A method of hydraulic fracturing comprising
formulating a hydraulic fracturing fluid comprising:
a liquid solvent comprising seawater;
at least one surfactant comprising an alkoxylate based surfactant and an ethoxylated isotridecanol based surfactant;
a liquid phase proppant-forming compound comprising a modified bisphenol A epoxy resin;
at least one curing agent comprising an amine modified curing agent; and
injecting the hydraulic fracturing fluid into a wellbore;
generating a product of agglomerated individual solid beads from the alkoxylate based surfactant and the ethoxylated isotridecanol based surfactant in the hydraulic fracturing fluid in-situ under down hole conditions; and
forming pillars from islands generated by the product of in-situ formed agglomerated individual solid beads in a two-dimensional structure capable of maintaining conductive fractures in a downhole environment.

### Claim 2 (depends on 1)

The method of claim 1 wherein the alkoxylate based surfactant is polysorbate 20.

### Claim 3 (depends on 1)

The method of claim 1 wherein the ethoxylated isotridecanol based surfactant further comprises 1-5% solvent naphtha and 0.1-1% by weight naphthalene.

### Claim 4 (depends on 1)

The method of claim 1 wherein the modified bisphenol A epoxy resin comprises 90-100% by weight phenol, 4-(1-methylethylidene) Bis, Polymer with (Chloromethane) Oxerane, 1-5% by weight epoxidize diluent reactive, 0-10% by weight epoxidize cresylglyciderether modified, and 0.1-0.5% by weight non-silicone additive.

### Claim 5 (depends on 1)

The method of claim 1 wherein the amine modified curing agent comprises 5-15% by weight benzyl alcohol, 15-35% by weight isophoromediamine adduct, and 50-60% by weight aliphatic amine adduct.

### Claim 6 (depends on 1)

The method of claim 1 wherein an effective liquid to solid conversion rate is greater than 95%.