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US 12,187,958 B2Granted
Rheology modifiers for high fluid-loss squeeze lost circulation materials
AssigneeHalliburton Energy Services, Inc.
InventorsJay Paul Deville, Hui Zhou
Life of this patent
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Abstract
Methods and compositions for servicing a wellbore and, in certain embodiments, to the use of compositions in a wellbore to mitigate lost circulation. In some embodiments, the methods include providing a treatment fluid that includes an aqueous base fluid, a lost circulation material, and a rheology modifier that includes a nanocellulose material; introducing the treatment fluid into a wellbore penetrating at least a portion of a subterranean formation including a loss zone; and allowing the treatment fluid to rapidly defluidize in the loss zone.
Claims12
A method comprising:
- providing a treatment fluid with a 40 ml fluid loss or greater according to API filtration test that comprises:
- an aqueous base fluid, wherein the aqueous base fluid comprises at least one component selected from the group consisting of a monovalent brine-based fluid, a low-density divalent brine-based fluid having a density of less than about 10 pounds per gallon, and any combination thereof;
- a lost circulation material, wherein the lost circulation material has a specific gravity in the range of from about 0.7 to about 4.0 and a Brinell value in the range of from about 0.1 to about 10;
- 6 lb/bbl of fluid loss control agent;
- and
- a rheology modifier that comprises a nanocellulose material, wherein the nanocellulose material is present in the treatment fluid in an amount of from about 0.1 to about 5 pounds per barrel by weight of the treatment fluid;
- crosslinking the nanocellulose material by a crosslinker;
- introducing the treatment fluid into a wellbore penetrating at least a portion of a subterranean formation including a loss zone;
- and
- allowing the treatment fluid to defluidize in the loss zone.
7 more elements
A method comprising:
- providing a lost circulation pill with a 40 ml fluid loss or greater according to API filtration test that comprises:
- an aqueous base fluid that comprises at least one component selected from the group consisting of a monovalent brine-based fluid, a low-density divalent brine-based fluid having a density of less than about 10 pounds per gallon, and any combination thereof;
- a lost circulation material, wherein the lost circulation material has a specific gravity in the range of from about 0.7 to about 4.0 and a Brinell value in the range of from about 0.1 to about 10;
- 6 lb/bbl of fluid loss control agent;
- and
- a rheology modifier that comprises a nanocellulose material, wherein the nanocellulose material is present in the treatment fluid in an amount of from about 0.1 to about 5 pounds per barrel by weight of the treatment fluid and wherein the nanocellulose material is selected from the group consisting of a nanocrystalline cellulose, a nanofibrillar cellulose, a microfibrillar cellulose, a cellulosic blend of nanofibrillar and microfibrillar cellulose, a bacterial nanocellulose, and any combination thereof;
- crosslinking the nanocellulose material by a crosslinker;
- introducing the lost circulation pill into a wellbore penetrating at least a portion of a subterranean formation including a loss zone;
- and
- allowing the lost circulation pill to defluidize in the loss zone.
7 more elements
Dependencies are inferred from the claim text.