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5002127 |
Placement aid for dual injection placement techniques
A method of controlling the permeability of underground well formations by the placement of a chemical barrier is provided. A first fluid and a second fluid are substantially simultaneously...
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4997487 |
High temperature set retarded well cement compositions and methods
Set retarded cement compositions which are substantially non-thinning at high temperatures are provided. The compositions are comprised of hydraulic cement, sufficient water to form a pumpable...
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4995461 |
Well kill treatment for oil field wellbore operations
A nonflowing crosslinked polymer gel is employed as a well kill material in a process for preventing or minimizing the intrusion of formation fluid into a wellbore while preventing or minimizing...
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4994194 |
Altering high temperature subterranean formation permeability
A method and composition for altering the permeability of a high temperature subterranean formation are provided. The composition of the invention is comprised of water, at least one water...
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4991652 |
Oil reservoir permeability profile control with crosslinked welan gum biopolymers
A composition capable of selectively plugging highly permeable zones in a subterranean formation. The composition forms a gel subsequent to its injection into the formation via an injection wall....
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4989673 |
Lost circulation fluid for oil field drilling operations
A flowing crosslinked polymer gel is employed as a lost circulation fluid in a process for reducing lost circulation during an oil field drilling operation. The lost circulation fluid comprises a...
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4986355 |
Process for the preparation of fluid loss additive and gel breaker
A melted polymer of hydroxyacetic acid with itself or with other hydroxy-, carboxylic acid-, or hydroxycarboxylic acid-containing moieties is subjected to high shear and injected into an organic...
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4984635 |
Thermal barriers for enhanced oil recovery
A process is described to direct heat towards a productive interval of a reservoir during a thermal enhanced oil recovery (EOR) operation. A chemical composition suitable for producing a rigid...
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4974677 |
Profile control process for use under high temperature reservoir conditions
A process for selectively plugging zones of high permeability within an oil-bearing subterranean formation. The process of the present invention comprises the steps of injecting into the formation...
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4972906 |
Method for selective plugging of a zone in a well
A mixture of a liquid epoxy material and a hardener is selectively placed in a well traversing a subterranean formation adjacent to a zone in said formation which is to be plugged. The mixture is...
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4969522 |
Polymer-coated support and its use as sand pack in enhanced oil recovery
A non-friable support, e.g., sand, coated with a polymer is prepared by contacting the support containing a polymerization catalyst with a monomer which is at least one multi-functional olefin,...
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4964465 |
Method employing liquidized sand for controlling lost circulation of drilling fluids
The disclosed invention is a method for reducing lost circulation in wellbores. In the method, a liquidized sand, comprised of a particulate material, a resin, and a carrier fluid comprising a...
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4958685 |
Method for plugging lost circulation areas and lost circulation material to be used therefor
A method for plugging the areas of lost circulation occurred during the drilling of a well with the use of a drilling mud, and a lost circulation material to be used therefor. The lost circulation...
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4957166 |
Lost circulation treatment for oil field drilling operations
A nonflowing crosslinked polymer gel is employed in a lost circulation treatment for reducing lost circulation during an oil field drilling operation. The nonflowing gel comprises a...
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4957165 |
Well treatment process
Hydroxyacetic acid condensation product is used as a fluid loss material in a well completion or workover process in which a fluid comprising a hydrolyzable aqueous gel is used. The hydroxyacetic...
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4951291 |
Semiconductor laser device with a protective film on the facets
A semiconductor laser device with a protective film on the facets, wherein said protective film is made of a multi-layered dielectric film composed of alternate layers consisting of at least two...
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4947933 |
Temperature activated polymer for profile control
A process for minimizing well recompletions in a hydrocarbonaceous fluid containing formation having an upper productive interval temperature in excess of 300° F. In this process, a temperature...
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4947935 |
Kill fluid for oil field operations
A flowing crosslinked polymer gel is employed as a kill fluid or as an additive to a kill fluid in a process for preventing the intrusion of formation fluid into a wellbore while minimizing...
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4942186 |
Continuously forming and transporting consolidatable resin coated particulate materials in aqueous gels
Methods of continuously forming and suspending consolidatable resin composition coated particulate material in a gelled aqueous carrier liquid and transporting the coated particulate material by...
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4940091 |
Method for selectively plugging a zone having varying permeabilities with a temperature activated gel
A process for closing pores in a heated steam swept zone of a formation having zones of varying permeabilities where a temperature activated aqueous gellable mixture is utilized following a steam...
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4936385 |
Method of particulate consolidation
The present invention provides a method of consolidating an incompetent subterrnean formation. An acid curable resin consolidating fluid is positioned within casing in a wellbore in the vicinity of...
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4934456 |
Method for altering high temperature subterranean formation permeability
A method and composition for altering the permeability of a high temperature subterranean formation are provided. The composition of the invention is comprised of water, at least one water...
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4930575 |
Method of protecting a permeable formation
A method of protecting a permeable formation penetrated by a well bore against damage by subsequent treatment operations. In protecting the formation against damage by cement used in installing a...
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4928763 |
Method of treating a permeable formation
A method of preventing intrusion of fluid into a horizontal well bore. A quantity of liquid composition capable of gelling and containing a breaker is introduced into a horizontal well bore up to a...
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4921576 |
Method for improving sweep efficiency in CO.sub.2 oil recovery
Volumetric sweep efficiency and oil recovery by CO 2 flooding processes may be increased by injecting a surfactant solution into the formation which will form a gel in-situ in the high...
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4921047 |
Composition and method for sealing permeable subterranean formations
A mixture of an epoxy material and two hardeners is placed in a subsurface zone in which it is desired to form an impermeable zone, and the epoxy is thereafter allowed to harden. The epoxy material...
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4920192 |
Polyurethane quasi prepolymer for proppant consolidation
A method of preparing a consolidating agent in the form of a polyurethane prepolymer for consolidating a proppant in a subterranean formation about a well employing the improvement characterized by...
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4917186 |
Altering subterranean formation permeability
Methods and compositions for altering the water permeability of subterranean formations are provided. The compositions are comprised of water, at least one polymer capable of being gelled when...
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4917185 |
Method to improve matrix acidizing in carbonates
A process for improved acidizing in carbonate formations, where controlled pulse fracturing (CPF) is utilized in combination with a retarded acid and a solidifiable gel. The solidifiable gel forms...
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4917188 |
Method for setting well casing using a resin coated particulate
An improved method for completing wells formed in both consolidated and unconsolidated formations is disclosed. Further, methods are disclosed for completing deviated wells formed in consolidated...
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4915170 |
Enhanced oil recovery method using crosslinked polymeric gels for profile control
A method for controlling the permeability profile of a subterranean oil-bearing formation utilizing polymeric gel-forming compositions which gel in-situ. The method comprises the steps of...
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4909324 |
Block copolymers useful for enhanced oil recovery processes
Polymers and gels useful for permeability control in subterranean formations, said polymers having structural forms of ABA triblocks and (AB) n multiblock are disclosed.
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4907656 |
Method for preventing steam channelling into a non-aquifer bottom water zone
A process for closing pores in a bottom water zone where steam is directed so as to by-pass a zone of the formation containing hydrocarbonaceous fluids. Once a portion of the bottom water zone has...
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4903767 |
Selective gelation polymer for profile control in CO.sub.2 flooding
A process for the selective gelation of a polymer for profile control during carbon dioxide flooding. First, a size selective gel is formed ex-situ. Upon entering a thief zone or a more permeable...
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4904125 |
Process for strengthening geological formations
The present invention is directed to a process for the strengthening of geological formations in underground workings and mines by the introduction of reaction mixtures which react to form...
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4903768 |
Method for profile control of enhanced oil recovery
A process for profile control in a high permeability zone of a formation. A water flooding or carbon dioxide stimulation enhanced oil recovery (EOR) process is conducted in an an oil-containing...
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4899818 |
Method to improve use of polymers for injectivity profile control in enhanced oil recovery
A method for minimizing blockage in a zone of lesser permeability when injecting gels into a formation during profile control. A solidifiable gel which comprises a hydroxyproyl guar gum containing...
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4899819 |
Method for suspending wells
A process for killing and suspending mixtures of hydrocarbonaceous fluid production, particularly oil, in a formation containing same which minimizes formation damage. First, a "spacer volume" of...
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4898242 |
Method for suspending wells
A process for killing and suspending mixtures of hydrocarbonaceous fluid production, particularly oil, in a formation containing same which minimizes formation damage. First, a "spacer volume" of...
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4898750 |
Processes for forming and using particles coated with a resin which is resistant to high temperature and high pH aqueous environments
We have found that it is possible to produce resin coated particular matter having uniform coating of resin to protect the particles against erosion or dissolution on contact with high pH fluids....
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4896723 |
Cross-linked polyvinyl alcohols and oil reservoir permeability control therewith
A novel cross-linked polymer is obtained by cross-linking polyvinyl alcohol with a cross-linking agent which is a mixture of a phenolic component and an aldehyde or a mixture of a naphtholic...
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4895207 |
Method and fluid for placing resin coated gravel or sand in a producing oil well
Disclosed are fluid and method for suspending resin coated sand in order to place the sand adjacent to a production well for the purpose of forming a permeable consolidated gravel pack. The fluid...
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4888240 |
High strength particulates
A high strength self-consolidating particle comprised of a particulate substrate, a substantially cured inner resin coating and a fusible curable outer resin coating.
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4885103 |
Cross-linking titanium & zirconium chelates & their use
Water-soluble N,N-bis-(2-hydroxyethyl)-glycine/metal chelates represented by the formula: ##STR1## wherein R is H or alkyl (1-12C); M is Ti or Zr; k is a number in the range between 0 and 1, p is a...
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4884636 |
Delaying the gelation of water soluble polymers
A process is disclosed for delaying the rate at which water soluble polymers are gelled by an aldehyde and a phenolic compound and for increasing the mechanical strength of these gels which...
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4883605 |
Zirconium chelates and their use for cross-linking
A water-soluble zirconium chelate formed from a tetraalkyl zirconate and hydroxyethyl-tris-(hydroxypropyl) ethylene diamine, and use of the chelate as cross-linking agents in hydraulic fracturing...
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4875525 |
Consolidated proppant pack for producing formations
A porous, consolidated proppant pack which can be formed within the fractures of a producing formation and/or within the wellbore of an earthen well adjacent a producing formation wherein both...
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4865129 |
High temperature profile modification agents and methods for using same
A new and improved composition and method for profile modification of subterranean formations characterized by high reservoir temperatures and/or harsh brine conditions are disclosed. The new and...
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4858693 |
Compositions and methods for reducing the permeability of underground strata
Compositions and methods are used for reducing the permeability of high fluid permeability segments of underground strata, the compositions being injected into the high permeability segments in...
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4851143 |
Amino resin modified xanthan polymer gels for permeability profile control
A composition of matter wherein amino resins such as melamine formaldehyde ("MF") resins modify polysaccharide polymers thereby forming gels with transitional metal ions useful for profile control...
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