Loss circulation materials for high pressure formations

Patent metadata

Field	Value
Publication number	US-11905458-B2
Application number	US-202217675747-A
Country	US
Kind code	B2
Filing date	Feb 18, 2022
Priority date	Feb 18, 2022
Publication date	Feb 20, 2024
Grant date	Feb 20, 2024

Abstract

Lost circulation material (LCM) compositions may include a resin; an emulsifier selected from the group consisting of ethoxylated phenol, sodium salt of modified tall oil fatty amide, carboxylic acid terminated fatty polyamide, modified amidoamine, tall oil fatty acid, oxidized tall oil fatty amidoamine, ether carboxylic acid, and combinations thereof; a crosslinker, a cementitious and/or weighting agent; a retarder; a dispersant; and a silicon-based defoamer. The LCM compositions may have a thickening time of from about 3 hours than about 6 hours by reaching a Bearden consistency of 100 Bc. 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

What is claimed:

1. A lost circulation material (LCM) composition comprising:
from about 1% to about 15% bwoc of a resin having an epoxy value in a range from 4.5 epoxy equivalents per kilogram of resin to 5.5 epoxy equivalents per kilogram of resin and an epoxy equivalent weight in a range from 170 to 350 grams of resin per epoxy equivalent (g/eq);
from about 0.01% to about 5 bwoc of an emulsifier selected from the group consisting of ethoxylated phenol, sodium salt of modified tall oil fatty amide, carboxylic acid terminated fatty polyamide, modified amidoamine, tall oil fatty acid, oxidized tall oil fatty amidoamine, ether carboxylic acid, and combinations thereof;
from about 0.01% to about 5% bwoc of a crosslinker to crosslink the resin, where the crosslinker comprises at least one amine group;
a cementitious and/or weighting agent;
from about 0.01% to about 0.5% bwoc of a retarder, where the retarder is selected from the group consisting of lignosulfonates, organic acids, phosphonic acid derivatives, copolymers of 2-acrylamido-2-methylpropane sulfonic acid (“AMPS”) and unsaturated carboxylic acids, inorganic borate salts, and combinations thereof;
from about 0.1% to about 2.0% bwoc of a dispersant; and
from about 0.001% to about 0.5% bwoc of a silicon-based defoamer,
wherein the LCM composition has a thickening time of from about 3 hours than about 6 hours by reaching a Bearden consistency of 100 Bc in a lost circulation zone of 4000 psi.

2. The LCM composition of claim 1 , where the LCM composition has a thickening time of from about 3 hours than about 5 hours by reaching a Bearden consistency of 70 Bc.

3. The LCM composition of claim 1 , where the resin comprises at least one of bisphenol-A-epichlorohydrin 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.

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

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

6. The LCM composition of claim 1 , where the LCM composition comprises from about 0.10 weight percent to about 0.20 weight percent of crosslinker.

7. The LCM composition of claim 1 , where the cementitious and/or weighting agent comprises class G cement and/or silica sand.

8. The LCM composition of claim 7 , where the cementitious and/or weighting agent further comprises barite and/or manganese tetraoxide.

9. The LCM composition of claim 1 , where the LCM composition has a density of from about 115 pounds per cubic foot (pcf) to about 150 pcf.

10. A method of eliminating or reducing lost circulation in a lost circulation zone from a well, the method comprising:
introducing a lost circulation material (LCM) composition into the well, the LCM composition comprising:
from about 1% to about 15% bwoc of a resin having an epoxy value in a range from 4.5 epoxy equivalents per kilogram of resin to 5.5 epoxy equivalents per kilogram of resin and an epoxy equivalent weight in a range from 170 to 350 grams of resin per epoxy equivalent (g/eq);
from about 0.01% to about 5% bwoc of an emulsifier selected from the group consisting of ethoxylated phenol, sodium salt of modified tall oil fatty amide, carboxylic acid terminated fatty polyamide, modified amidoamine, tall oil fatty acid, oxidized tall oil fatty amidoamine, ether carboxylic acid, and combinations thereof;
from about 0.01% to about 5% bwoc of a crosslinker to crosslink the resin, where the crosslinker comprises at least one amine group;
a cementitious and/or weighting agent;
from about 0.01% to about 0.5% bwoc of a retarder, where the retarder is selected from the group consisting of lignosulfonates, organic acids, phosphonic acid derivatives, copolymers of 2-acrylamido-2-methylpropane sulfonic acid (“AMPS”) and unsaturated carboxylic acids, inorganic borate salts, and combinations thereof;
from about 0.1% to about 2.0% bwoc of a dispersant; and
from about 0.001% to about 0.5% bwoc of a silicon-based defoamer,
wherein the LCM composition has a thickening time of from about 3 hours than about 6 hours by reaching a Bearden consistency of 100 Bc in a lost circulation zone of 4000 psi.

11. The method of claim 10 , further comprising thickening the LCM composition in the well.

12. The method of claim 11 , where the LCM composition has a thickening time of from about 3 hours than about 5 hours by reaching a Bearden consistency of 70 Bc.

13. The method of claim 11 , where the LCM composition has a density of from about 115 pounds per cubic foot (pcf) to about 150 pcf.

14. The method of claim 10 , where the lost circulation zone is located at a depth of up to 15,000 feet.

Assignees

• Saudi Arabian Oil Co

Inventors

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

Classifications

• C09K8/512 Primary

  containing cross-linking agents · CPC title

• C09K8/516

  characterised by their form or by the form of their components, e.g. encapsulated material · CPC title

• E21B21/003

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

• C09K8/03 Primary

  Specific additives for general use in well-drilling compositions · CPC title

• C09K8/426

  for plugging · CPC title