Emulsified resin-based loss circulation materials for low pressure formations

Patent metadata

Field	Value
Publication number	US-2022267664-A1
Application number	US-202117185000-A
Country	US
Kind code	A1
Filing date	Feb 25, 2021
Priority date	Feb 25, 2021
Publication date	Aug 25, 2022
Grant date	—

Abstract

Lost circulation material (LCM) compositions may include an epoxy resin, an emulsifier comprising a polyaminated fatty acid, water, a crosslinker, and an optional cementitious and/or weighting agent. These LCM compositions may have a density of from about 63 pounds per cubic foot (pcf) to about 99 pcf and may be capable of being injected through a drill bit of a drill string into a lost circulation zone in wellbores. Corresponding methods of eliminating or reducing lost circulation in a lost circulation zone from a well may include introducing these LCM compositions into the well.

First claim

1 . A lost circulation material (LCM) composition comprising:
an epoxy resin; an emulsifier comprising a polyaminated fatty acid; water; a crosslinker; and an optional cementitious and/or weighting agent, wherein the LCM composition has a density of from about 63 pounds per cubic foot (pcf) to about 99 pcf and is capable of being injected through a drill bit of a drill string into a lost circulation zone in wellbores.

2 . The LCM composition of claim 1 , where the LCM composition has a density of from about 70 pcf to about 79 pcf.

3 . The LCM composition of claim 1 , where the LCM composition comprises from about 0.1 weight percent to about 1.5 weight percent of crosslinker.

4 . The LCM composition of claim 1 , where the LCM composition has a thickening time of less than about 4 hours.

5 . The LCM composition of claim 1 , where the epoxy resin comprises at least one of bisphenol-A-epichlorohydrin epoxy resin, C 12 -C 14 alkyl glycidyl ether derivatives, 2,3-epoxypropyl o-tolyl ether, 1,6-hexanediol diglycidyl ether, butyl glycidyl ether, cyclohexanedimethanol diglycidyl ether, or combinations of these.

6 . The LCM composition of claim 1 , where the epoxy resin comprises bisphenol-A-epichlorohydrin epoxy resin and C 12 -C 14 alkyl glycidyl ether.

7 . The LCM composition of claim 1 further comprising a reactive diluent comprising oxirane mono [(C 12 -C 14 )-alkyloxy) methyl] derivatives.

8 . The LCM composition of claim 1 , where the crosslinker comprises at least one of diethylenetriamine (DETA), diethyltoluenediamine (DETDA), polyoxypropylene diamine, or combinations of these.

9 . The LCM composition of claim 1 , where the cementitious and/or weighting agent comprises class G cement, barite (barium sulfate), calcium carbonate (CaCO 3 ), ilmenite, or combinations of these.

10 . The LCM composition of claim 1 , where the LCM composition comprises about 5 wt % to about 75 wt % epoxy resin, from about 0.01 wt % to about 10 wt % crosslinker, from about 0.1 wt % to about 20 wt % emulsifier comprising a polyaminated fatty acid, from about 5 wt % to about 25 wt % water, and from 0 wt % to about 70 wt % cementitious and/or weighting agent.

11 . A method of eliminating or reducing lost circulation in a lost circulation zone from a well, the method comprising:
introducing a first lost circulation material (LCM) composition into the well, the first LCM composition comprising:
an epoxy resin;
an emulsifier comprising a polyaminated fatty acid;
water;
a crosslinker; and
an optional cementitious and/or weighting agent,

wherein the first LCM composition has a density of from about 63 pounds per cubic foot (pcf) to about 99 pcf.

12 . The method of claim 11 , further comprising thickening the first LCM composition in the well.

13 . The method of claim 12 , where the first LCM composition has a thickening time of less than about 4 hours.

14 . The method of claim 12 , where the first LCM composition has a thickening time of from about 2 hours to about 4 hours.

15 . The method of claim 12 , further comprising introducing a second LCM composition in the well after the thickening of the first LCM composition.

16 . The method of claim 11 , where the first LCM composition has a density of from about 70 pcf to about 79 pcf.

17 . The method of claim 11 , where the lost circulation zone is located in formations having pressures of from about 63 pcf to about 99 pcf.

18 . The method of claim 11 , where the lost circulation zone is located at a depth of up to 5000 feet.

Assignees

• Saudi Arabian Oil Co

Inventors

• Al-Safran Ali
• Alanqari Khawlah A
• Wagle Vikrant
• Al-Joher Abdulwahab
• Al-Yami Abdullah S

Classifications

• C09K8/508

  macromolecular compounds {(C09K8/512 takes precedence)} · CPC title

• C09K8/5045 Primary

  containing inorganic compounds · CPC title

• C09K8/512 Primary

  containing cross-linking agents · CPC title

• E21B33/138

  Plastering the borehole wall; Injecting into the formation · CPC title

• E21B21/003

  Means for stopping loss of drilling fluid (plastering the borehole wall E21B33/138) · CPC title