摘要:
Treating fluids comprising sulfonated gelling agent polymers, and methods of use in treating subterranean formations, are provided. The treating fluids comprise water and one or more sulfonated gelling agent polymers. In one embodiment, the methods comprise providing a treating fluid that comprises water and one or more sulfonated gelling agent polymer; and introducing the treating fluid into a subterranean formation.
摘要:
This invention relates to methods for preparing slurries that include depolymerized polysaccharides and depolymerized and derivatized polysaccharides that may be useful in subterranean well operations including fracturing, gravel packing, and frac-packing. One embodiment of the present invention provides a method for making a slurry, comprising combining a polysaccharide with an organic solvent to form a slurry; and, depolymerizing the polysaccharide in the slurry. Another embodiment of the present invention provides a method of treating subterranean formation with slurry comprising the steps of creating a slurry using a method comprising the steps of combining a polysaccharide with an organic solvent to form a slurry; and, depolymerizing the polysaccharide in the slurry; and, placing that slurry into a subterranean formation.
摘要:
A process of increasing the viscosity of a gel, or the yield of a hydratable material includes heating a hydratable material, an aqueous component or both, prior to mixing the hydratable material with the aqueous component. In certain instances, the aqueous component is heated to a temperature of at least about 100° F., and the hydratable material component and the heated aqueous component are mixed together to form a gel in certain instances, the hydratable material component is heated to a temperature of at least about 100° F., and the heated hydratable material component and the aqueous component are mixed together to form a gel.
摘要:
The present invention provides methods of preparing and using viscous gelled well treating fluids devoid of insoluble gelling agent residue and compositions. A viscous gelled treating fluid composition devoid of insoluble gelling agent residue basically comprises water, a hydrated gelling agent and the water insoluble residue therefrom, a base for raising the pH of the water so that the water insoluble residue is dissolved therein, and additional water to lower the amount of the gelling agent in the treating fluid relative to the amount of water therein and to lower the pH thereof.
摘要:
The present invention provides a method of reducing the viscosity of a viscosified treatment fluid comprising the steps of: providing a viscosified treatment fluid that comprises water, a crosslinked gelling agent, and a delinking composition capable of delinking at least a portion of the crosslinked gelling agent wherein the delinking composition comprises a delinking agent; and allowing the crosslinked gelling agent and the delinking composition to interact so as to delink at least a portion of the crosslinked gelling agent. The present invention also provides methods of reusing viscosified treatment fluids, methods of fracturing subterranean formations, and methods of gravel packing subterranean formations. The present invention also provides delinking compositions capable of delinking at least a portion of a crosslinked gelling agent; and a viscosified treatment fluid comprising water, a crosslinked gelling agent, and a delinking composition capable of delinking at least a portion of the crosslinked gelling agent wherein the delinking composition comprises a delinking agent.
摘要:
The invention provides a method of treating a subterranean formation penetrated by a wellbore, the method comprising the steps of: (a) mixing a particulate and an active material to obtain an at least partially coated particulate, wherein: (i) water forms a contact angle of less than 90 degrees with a surface of the particulate, (ii) the active material is capable of forming a coating on the particulate, (iii) the active material forms a contact angle less than 90 degrees with the particulate, and (iv) water forms a contact angle of greater than 90 degrees with a layer of the active material; (b) mixing the at least partially coated particulate and a carrier fluid to obtain a treatment fluid; and (c) introducing the treatment fluid into the subterranean formation through the wellbore to deposit the at least partially coated particulate into the subterranean formation.
摘要:
In one embodiment, the present invention provides a method of increasing the viscosity of a treatment fluid comprising the steps of: adding a networking agent to the treatment fluid, wherein the networking agent is represented by the formula: Y—X—[B(OR)2]n, wherein: Y is at least partially capable of forming a crosslink between a gelling agent molecule, a second networking agent, and/or a combination thereof; X is at least partially capable of preventing or inhibiting a reaction represented by the formula: ROH+R′B(OR)2→R′OH+B(OR)3; R and R′ are a hydrogen, an alkyl group, an aryl group, or a combination thereof; and n is a positive integer greater than or equal to 1; allowing at least one crosslink to form between the networking agent and a gelling agent molecule, a second networking agent, and/or a combination thereof; and allowing the viscosity of the treatment fluid to increase. Methods of treating a portion of a subterranean formation, networking agent compositions, and treatment fluid compositions also are provided.
摘要:
Methods and compositions for sealing subterranean zones having temperatures in the range of from about 80° F. to about 300° F. are provided. A method of the invention is basically comprised of the steps of providing a subterranean zone sealing composition that becomes substantially rigid when exposed to subterranean zone temperatures above about 80° F. and has a pH above about 8.5 comprised of water, a substantially fully hydrated depolymerized polymer and a cross-linking agent. The sealing composition is introduced into the subterranean zone whereby it becomes rigid and seals the zone. The sealing composition can subsequently be removed by contact with a fluid having a pH below about 8 when a boron compound is utilized as the cross-linking agent.
摘要:
Provided are methods of modifying the surface stress-activated reactivity of proppant particulates used in subterranean operations. In one embodiment, the methods comprise: providing a plurality of particulates, at least one of which comprises a mineral surface; providing a surface-treating reagent capable of modifying the stress-activated reactivity of a mineral surface of a particulate; and allowing the surface-treating reagent modify the stress-activated reactivity of at least a portion of the mineral surface of at least one particulate. In other embodiments, the methods comprise the use of particulates comprising a modified mineral surface in fluids introduced into subterranean formations.
摘要:
Provided are methods of modifying the stress-activated reactivity of subterranean fracture faces and other surfaces in subterranean formations. In one embodiment, the methods comprise: providing a treatment fluid that comprises a base fluid and a surface-treating reagent capable of modifying the stress-activated reactivity of a mineral surface in a subterranean formation; introducing the treatment fluid into a subterranean formation; and allowing the surface-treating reagent to modify the stress-activated reactivity of at least a portion of a mineral surface in the subterranean formation.