Andrew Bryce Conway

US Patent:

20200224082, Jul 16, 2020

Filed:

Mar 26, 2020

Appl. No.:

16/831444

Inventors:

- Weatherford OK, US
Andrew Bryce Conway - Weatherford OK, US

Assignee:

Flex-Chem Holding Company, LLC - Weatherford OK

International Classification:

C09K 8/60
E21B 43/267
C09K 8/62
C09K 8/528

Abstract:

Formulations and methods for stimulating the production from wells in nano-darcy shale formations are described. In one embodiment, the method includes injecting a treatment mixture containing a metal complexing agent into a nano-darcy shale formation adjacent to a well at a pressure below the fracture pressure of the formation. A sufficient contact time is allowed and then the treatment mixture is pumped from the subsurface. This has been shown to stimulate well production in shale formations. Without being held to a particular theory it appears that the metal complexing agent is binding with naturally occurring metals in the shale formation, and particularly divalent metal ions, which are then extracted with the spent fluid. This removal of naturally occurring metals may be increasing the permeability of the formation in the contact region adjacent to the well, thereby causing the observed increased production.

US Patent:

20180155613, Jun 7, 2018

Filed:

Jan 19, 2018

Appl. No.:

15/875265

Inventors:

- Weatherford OK, US
Andrew Bryce Conway - Weatherford OK, US

International Classification:

C09K 8/60
E21B 43/267
C09K 8/528
C09K 8/62
C09K 8/72

Abstract:

This disclosure describes formulations and methods for stimulating the production from wells in nano-darcy shale formations. In one embodiment, the method includes injecting a treatment mixture containing a metal complexing agent into a nano-darcy shale formation adjacent to a well at a pressure below the fracture pressure of the formation. A sufficient contact time is allowed and then the treatment mixture is pumped from the subsurface. This has been shown to stimulate well production in shale formations. Without being held to a particular theory it appears that the metal complexing agent is binding with naturally occurring metals in the shale formation, and particularly divalent metal ions, which are then extracted with the spent fluid. This removal of naturally occurring metals may be increasing the permeability of the formation in the contact region adjacent to the well, thereby causing the observed increased production.

US Patent:

20160068745, Mar 10, 2016

Filed:

Sep 4, 2015

Appl. No.:

14/845696

Inventors:

- Weatherford OK, US
Andrew Bryce Conway - Weatherford OK, US

International Classification:

C09K 8/80

Abstract:

In a slick-water fracturing operation, a composition is used to prevent the interaction between a polymer in a water-based fracturing fluid and naturally-occurring metal ions. The composition includes a metal-complexing agent, such as a chelating agent. The chelating agent can also be biodegradable and is citric acid in embodiments. The metal-complexing agent can be coated with one or two coatings to create a time-released form. The time-released form prevents loss of the agent prior to delivery at the shale.

US Patent:

20150292308, Oct 15, 2015

Filed:

Apr 14, 2015

Appl. No.:

14/686237

Inventors:

- Weatherford OK, US
Andrew Bryce Conway - Weatherford OK, US

Assignee:

Flex-Chem Holding Company, LLC - Weatherford OK

International Classification:

E21B 43/16
C09K 8/60
E21B 47/06
C09K 8/62
E21B 43/26
E21B 43/267

Abstract:

This disclosure describes formulations and methods for stimulating the production from wells in nano-darcy shale formations. In one embodiment, the method includes injecting a treatment mixture containing a metal complexing agent into a nano-darcy shale formation adjacent to a well at a pressure below the fracture pressure of the formation. A sufficient contact time is allowed and then the treatment mixture is pumped from the subsurface. This has been shown to stimulate well production in shale formations. Without being held to a particular theory it appears that the metal complexing agent is binding with naturally occurring metals in the shale formation, and particularly divalent metal ions, which are then extracted with the spent fluid. This removal of naturally occurring metals may be increasing the permeability of the formation in the contact region adjacent to the well, thereby causing the observed increased production.

US Patent:

20150114653, Apr 30, 2015

Filed:

Oct 27, 2014

Appl. No.:

14/525038

Inventors:

Andrew Bryce Conway - Weatherford OK, US
Robert Easterly - Tulsa OK, US

International Classification:

E21B 43/26
E21B 47/06

US Classification:

1663082, 16625001

Abstract:

This disclosure describes formulations and methods for remediating subterranean-formed metal-polymer complexes in wells in subterranean formations. In one embodiment, the method includes injecting a metal-polymer complex remediation mixture containing a metal complexing agent into a subterranean formation adjacent to a well at a pressure below the fracture pressure of the formation. A sufficient contact time is allowed and then the metal-polymer complex remediation mixture is pumped from the subsurface. This has been shown to remediate polymer-containing, subterranean-formed metal-polymer complexes in shale formations. Without being held to a particular theory it appears that the metal complexing agent is forming metal complexes with the metals in the complexes, and particularly divalent metal ions. This removal of naturally occurring metals may be un-crosslinking and causing the metal-polymer complexes to go into solution, thereby removing the blockages caused by the metal-polymer complexes.