Methods and compositions for clay control
AssigneeHalliburton Energy Services, Inc.
InventorsJimmie D. Weaver, Philip D. Nguyen
Life of this patent
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Abstract
Stabilizing a subterranean formation containing water-sensitive clays with methods including introducing a leading-edge fluid comprising a first base fluid and a first clay stabilizer solution wherein the first clay stabilizer is present in the first base fluid at a first concentration; and then introducing a treatment fluid comprising a second base fluid and a second clay stabilizer solution wherein the second clay stabilizer is present in the second base fluid at a second concentration, wherein the first concentration of clay stabilizer solution is higher than the second concentration of clay stabilizer solution.
Claims20
A method of stabilizing a subterranean formation containing water-sensitive minerals comprising:
- introducing a leading-edge fluid comprising a first base fluid and a first clay stabilizer wherein the first clay stabilizer is present in the first base fluid at a first concentration;
- then, directly after the leading-edge fluid, introducing a treatment fluid comprising a second base fluid and a second clay stabilizer wherein the second clay stabilizer is present in the second base fluid at a second concentration;
- and
- wherein the first concentration of the first clay stabilizer is higher than the second concentration of the second clay stabilizer;
- and
- wherein the first clay stabilizer and the second clay stabilizer each independently comprise at least one selected from the group consisting of a polymer, a resin, a soluble organic stabilizing compound, and any combination thereof.
A method of stabilizing a subterranean formation containing water-sensitive minerals comprising:
- introducing a leading-edge fluid into a subterranean formation above a matrix pressure,
- wherein the leading-edge fluid comprises a first base fluid and a first clay stabilizer and wherein the first clay stabilizer is present in the first base fluid at a first concentration;
- and
- then, directly after the leading-edge fluid, introducing a treatment fluid into the subterranean formation above the matrix pressure,
- wherein the treatment fluid comprises a second base fluid and a second clay stabilizer and wherein the second clay stabilizer is present in the second base fluid at a second concentration, and
- wherein the first concentration of the first clay stabilizer is higher than the second concentration of the second clay stabilizer;
- and
- wherein the first clay stabilizer and the second clay stabilizer each independently comprise at least one selected from the group consisting of a polymer, a resin, a soluble organic stabilizing compound, and any combination thereof.
A method comprising:
- introducing a leading-edge fluid into a subterranean formation below a matrix pressure, the leading-edge fluid comprising a clay stabilizer at about 5% to about 15% v/v of the leading-edge fluid;
- then, directly after the leading-edge fluid, introducing a fracturing fluid into the subterranean formation above the matrix pressure, the fracturing fluid comprising the clay stabilizer at about 0.001% to about 1% v/v of the fracturing fluid;
- and
- wherein the clay stabilizer comprises at least one selected from the group consisting of a polymer, a resin, a soluble organic stabilizing compound, and any combination thereof.
Dependencies are inferred from the claim text.