Coated proppants and methods of making and use thereof

Patent metadata

Field	Value
Publication number	US-10954434-B2
Application number	US-202016830989-A
Country	US
Kind code	B2
Filing date	Mar 26, 2020
Priority date	Apr 10, 2019
Publication date	Mar 23, 2021
Grant date	Mar 23, 2021

Abstract

Methods for producing proppants with block copolymer proppant coating include coating proppant particles with the block copolymer proppant coating to produce coated proppants with block copolymer proppant coating. The block copolymer proppant coating is a block copolymer composition having at least one copolymer backbone. Each copolymer backbone comprises at least two hard segments and a soft segment disposed between the at least two hard segments. Additionally, a proppant comprising a proppant particle and a block copolymer proppant coating is provided. The block copolymer proppant coating is a block copolymer composition having at least one copolymer backbone, in which each copolymer backbone comprises at least two hard segments. A soft segment is disposed between the at least two hard segments. The copolymer backbone has at least one anhydride group grafted onto the soft segment. Furthermore, the anhydride group is crosslinked by an amine-containing crosslinker.

First claim

What is claimed is:

1. A coated proppant comprising:
a proppant particle comprising sand, ceramic material, or combinations thereof; and
a block copolymer proppant coating coating the proppant particle, in which
the block copolymer proppant coating is a block copolymer composition having at least one copolymer backbone, each copolymer backbone comprising at least two hard segments, and a soft segment disposed between the at least two hard segments, wherein the copolymer backbone has at least one anhydride group grafted onto the soft segment, and the anhydride group being crosslinked by an amine-containing crosslinker.

2. The coated proppant of claim 1 , in which:
the block copolymer comprises styrene-ethylene-butylene-styrene (SEBS) block copolymer, polyether block amide (PEBA) block copolymer, or both; and
the anhydride group comprises a succinic anhydride group, a maleic anhydride group, or combinations thereof.

3. The coated proppant of claim 1 , in which the block copolymer having the grafted anhydride group comprises styrene-ethylene-butylene-styrene (SEBS) block copolymer in which the anhydride group comprises a succinic anhydride group and the anhydride group is grafted onto one of a secondary carbon or a tertiary carbon of the soft segment.

4. The coated proppant of claim 1 , in which:
the coated proppant has a crush percentage of less than 10% at 6000 psi,
the coated proppant has a crush percentage of less than 25% at 8000 psi; and
the block copolymer proppant coating has a tensile strength of from 3000 to 5000 psi.

5. The coated proppant of claim 1 , in which the block copolymer proppant coating further comprises a tracer material comprising at least one of thorium dioxide (ThO 2 ), barium sulfate (BaSO 4 ), diatrizoate, metrizoate, iothalamate, ioxaglate, iopamidol, iohexol, ioxilan, iopromide, iodixanol, and ioversol.

6. A method for increasing a rate of hydrocarbon production from a subsurface formation comprising:
producing a first rate of production of hydrocarbons from the subsurface formation;
introducing a hydraulic fracturing fluid comprising a plurality of the coated proppants of claim 1 into the subsurface formation; and
increasing hydrocarbon production from the subsurface formation by producing a second rate of production of hydrocarbons from the subsurface formation, in which the second rate of production of hydrocarbons is greater than the first rate of production of hydrocarbons.

Assignees

• Saudi Arabian Oil Co

Inventors

• Reddy B Raghava
• Liang Feng

Classifications

• E21B43/267

  reinforcing fractures by propping · CPC title

• C09K8/805 Primary

  Coated proppants · CPC title

• C08G81/022

  containing sequences of polymers of conjugated dienes and of polymers of alkenyl aromatic compounds · CPC title

• C09K8/62

  Compositions for forming crevices or fractures · CPC title

• C08G81/025

  containing polyether sequences · CPC title