Modified vegetable oil as fluid loss control additive
AssigneeHalliburton Energy Services, Inc.
InventorsSharad Bhimrao Gotmukle, Nivika Rajendra Gupta, Jeffrey J Miller
Life of this patent
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Abstract
Invert emulsions can be used in oil and gas operations. A fluid loss control additive (FLCA) is a component of the fluid that can be utilized to control or minimize fluid loss into a subterranean formation. The FLCA can be a chemically modified vegetable oil that is biodegradable. Vegetable oils having some or all of the functional groups sulfonated can be used as FLCA. A water-soluble salt that has been dissolved in the discontinuous phase of the invert emulsion can combine with the FLCA to form a wax-like, solid mass.
Claims20
A treatment fluid comprising:
- a continuous phase comprising a hydrocarbon liquid;
- a discontinuous phase comprising water and a water-soluble salt;
- and
- a fluid loss control additive, wherein the fluid loss control additive is a water-insoluble vegetable oil, wherein one or more functional groups of the vegetable oil are chemically modified to form a chemically modified vegetable oil, and wherein the fluid loss control additive comprises Turkey red oil,
- wherein the treatment fluid has a high-pressure, high-temperature fluid loss less than 15 milliliters per 30 minutes at a testing temperature in the range of 93.3° C. to 176.7° C. and a testing pressure of 500 psi (3.45 MPa), and wherein the treatment fluid has a water phase salinity in the range of 100,000 to 400,000 parts per million.
A method of treating a portion of a subterranean formation comprising:
- introducing a treatment fluid into a wellbore that penetrates the subterranean formation,
- the treatment fluid comprising:
- a continuous phase comprising a hydrocarbon liquid;
- a discontinuous phase comprising water and a water-soluble salt;
- and
- a fluid loss control additive, wherein the fluid loss control additive is a water-insoluble vegetable oil, and wherein one or more functional groups of the vegetable oil are chemically modified to form a chemically modified vegetable oil, and wherein the fluid loss control additive comprises Turkey red oil, wherein the treatment fluid has a high-pressure, high-temperature fluid loss less than 15 milliliters per 30 minutes at a testing temperature in the range of 93.3° C. to 176.7° C. and a testing pressure of 500 psi (3.45 MPa), and wherein the treatment fluid has a water phase salinity in the range of 100,000 to 400,000 parts per million;
- and
- causing or allowing the fluid loss control additive to reduce fluid loss of the continuous phase and the discontinuous phase of the treatment fluid into the subterranean formation.
Dependencies are inferred from the claim text.