Non-damaging fluid-loss pill and method of using the same
OwnerMathew Samuel, Richard Marcinew +1inventors
InventorsMathew Samuel, Richard Marcinew, Zhijun Xiao
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Abstract
A fluid-loss pill that includes a brine solution and an effective amount of a viscoelastic surfactant is disclosed. The viscoelastic surfactant preferably includes at least one compound selected from the family of compounds described by 1 where R1, R2, R3, R4 and R5 are carbon atom or carbon chains, saturated or unsaturated, single or multiple unsaturation, straight chain, branched chain or cyclic including aromatic or alicyclic groups, and R1 contains 16-26 carbon atoms, R2 contains 2-10 carbon atoms, R3, R4 and R5 contains 1-6 carbon atoms. Methods of treating a well that include injecting fluid-loss pill into a well to control lost-circulation or to kill a well.
Claims40
A fluid loss control, lost-circulation pill comprising:
- An aqueous solution;
- and
- A viscoelastic surfactant added in an effective amount to provide an increase of viscosity at near-static reservoir conditions.
A method of controlling loss circulation in a well comprising injecting a fluid loss pill comprising:
- An aqueous solution;
- and
- A viscoelastic surfactant added in an effective amount to provide an increase of viscosity at near-static reservoir conditions.
A method of killing a well comprising injecting a fluid loss pill comprising:
- An aqueous solution;
- and
- A viscoelastic surfactant added in an effective amount to provide an increase of viscosity at near-static reservoir conditions.
A method of pre-conditioning a well in a high-permeable reservoir prior to performing the injection of a polymer-base fluid comprising injecting a fluid loss pill
- An aqueous solution;
- and
- A viscoelastic surfactant added in an effective amount to provide an increase of viscosity at near-static reservoir conditions.
- to minimize to the volume of polymer invasion into the formation before the formation of the polymer-containing filter cake.
A method of packing a well comprising the placement of solids comprising the use of a fluid comprising
- An aqueous solution;
- and
- A viscoelastic surfactant added in an effective amount to provide an increase of viscosity at near-static reservoir conditions.
Dependencies are inferred from the claim text.