Compositions of hydraulic fracturing fluid and method thereof

Patent metadata

Field	Value
Publication number	US-2020369952-A1
Application number	US-202016933955-A
Country	US
Kind code	A1
Filing date	Jul 20, 2020
Priority date	Oct 25, 2018
Publication date	Nov 26, 2020
Grant date	—

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.

First claim

What is claimed is:

1 . A method of hydraulic fracturing comprising
formulating a hydraulic fracturing fluid comprising
a liquid solvent,
at least one surfactant,
a liquid phase proppant-forming compound, and
at least one curing agent;
injecting the hydraulic fracturing fluid into a wellbore; wherein the proppant is generated from a liquid system in-situ under down hole conditions; and wherein the liquid phase proppant-forming compound forms pillars in a two-dimensional structure capable of maintaining conductive fractures in the downhole environment.

2 . The method of claim 1 , wherein the liquid solvent is selected from the group consisting of water, seawater, brine containing monovalent, divalent, and multivalent salts, an alcohol such as ethanol, propanol, and butanol, and combinations thereof.

3 . The method of claim 1 , wherein the surfactant is selected from the group consisting of anionic surfactants, cationic surfactants, nonionic surfactants, amphoteric surfactants and combinations thereof.

4 . The method of claim 1 , wherein the liquid phase proppant-forming compound is selected from the group consisting of aliphatic epoxides, anhydrides, glycidyl amine epoxide, cycloaliphatic epoxides, epoxy functional resins, polyurethane resins, phenol-formaldehyde resin, bis-phenol A diglycidyl ether, poly glycidyl ethers, acrylic resin, glycidyl ethers, bis-phenol F diglycidyl ethernovalac resins, and combinations thereof.

5 . The method of claim 1 , wherein the curing agent is selected from the group consisting of isophorone diamine, boron tri-fluoride derivatives, imidazolines, mercaptans, hydrazides, polyamides, functional resins, mono ethanol amine, benzyl dimethylamine, lewis acids, tertiary amines, cycloaliphatic amines, amidoamines, aliphatic amines, aromatic amines, isophorone, imidazoles, sulfide, amides and their derivatives.

6 . The method of claim 1 , further comprising a pH control agent.

7 . The method of claim 6 , wherein the pH control agent is selected from the group consisting of mineral acids, fluoroboric acid, sulfonic acids, carboxylic acids and combinations thereof.

8 . The method of claim 1 , further comprising a viscosity modifier.

9 . The method of claim 8 , wherein the viscosity modifier is selected from the group consisting of nanoparticles and water-soluble polymers.

10 . The method of claim 1 , further comprising a strength enhancing additive.

11 . The method of claim 10 , wherein the strength enhancing additive is selected from the group consisting of silicon particles, graphene particles, carbon black, ceramic particles, and combination thereof.

12 . The method of claim 1 wherein in the hydraulic fracturing fluid further comprises:
31 wt % sea water,
31 wt % resin comprising: 90-100% Phenol, 4-(1-methylethylidene) Bis, polymer with (chloromethane) oxerane, 1-20% epoxide Diluent, 0-10% Modified Epoxy Novalac, 0.1-0.5% Non-Silicone Additive,
31 wt % curing agent comprising: 5-15% Benzyl Alcohol, 15-35% isophoronediamine adduct, 50-60% Aliphatic amine adduct
7 wt % cationic detergent comprising 99% benzethonium chloride and 1% water.

13 . The method of claim 1 , wherein the hydraulic fracturing fluid further comprises: 23 wt % Poly(Bisphenol A-CO-Epichlorohydrin), Glycidyl End-Capped, 50 wt % 10% Sodium chloride solution, 5 wt % surfactant comprising 35% alkyl imino dipropionic acid, monosodium salt in 65% water, 5 wt % 50% Sodium hydroxide, 15 wt % fatty amine comprising 95-99% tall oil hydroxyethyl imidazoline and 1-5% aminoethylethanolamine, and 2 wt % Isophorone diamine

14 . The method of claim 1 , wherein the liquid phase proppant-forming compound forms individual solid beads.

Assignees

• Cnpc Usa Corp

Inventors

• Lin Lijun
• Huang Jiangshui
• Bai Litao
• Yu Stephanie
• Liu Fuchen
• Yin Congbin
• Gong Wei

Classifications

• C09K8/665

  containing inorganic compounds (proppants C09K8/80) · CPC title

• C09K8/685

  containing cross-linking agents · CPC title

• C09K8/602

  containing surfactants · CPC title

• C09K8/80 Primary

  Compositions for reinforcing fractures, e.g. compositions of proppants used to keep the fractures open · CPC title

• C09K8/68

  containing organic compounds · CPC title