WO2012021373A1 - Matériau à libération contrôlée - Google Patents
Matériau à libération contrôlée Download PDFInfo
- Publication number
- WO2012021373A1 WO2012021373A1 PCT/US2011/046574 US2011046574W WO2012021373A1 WO 2012021373 A1 WO2012021373 A1 WO 2012021373A1 US 2011046574 W US2011046574 W US 2011046574W WO 2012021373 A1 WO2012021373 A1 WO 2012021373A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- encapsulated
- materials
- aluminum
- capsule
- sulfur
- Prior art date
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- 239000004824 Multi-part adhesive Substances 0.000 description 1
- SNIOPGDIGTZGOP-UHFFFAOYSA-N Nitroglycerin Chemical compound [O-][N+](=O)OCC(O[N+]([O-])=O)CO[N+]([O-])=O SNIOPGDIGTZGOP-UHFFFAOYSA-N 0.000 description 1
- 208000002565 Open Fractures Diseases 0.000 description 1
- 108700026244 Open Reading Frames Proteins 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 229910001252 Pd alloy Inorganic materials 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 238000010796 Steam-assisted gravity drainage Methods 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- DHXVGJBLRPWPCS-UHFFFAOYSA-N Tetrahydropyran Chemical compound C1CCOCC1 DHXVGJBLRPWPCS-UHFFFAOYSA-N 0.000 description 1
- 238000010797 Vapor Assisted Petroleum Extraction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229920006397 acrylic thermoplastic Polymers 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000002318 adhesion promoter Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 238000009360 aquaculture Methods 0.000 description 1
- 244000144974 aquaculture Species 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 210000004666 bacterial spore Anatomy 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000006065 biodegradation reaction Methods 0.000 description 1
- 230000004071 biological effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229960000074 biopharmaceutical Drugs 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 229940041514 candida albicans extract Drugs 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- NLCKLZIHJQEMCU-UHFFFAOYSA-N cyano prop-2-enoate Chemical class C=CC(=O)OC#N NLCKLZIHJQEMCU-UHFFFAOYSA-N 0.000 description 1
- 238000002716 delivery method Methods 0.000 description 1
- 238000005137 deposition process Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000002355 dual-layer Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000007765 extrusion coating Methods 0.000 description 1
- 229940069931 ez-ox Drugs 0.000 description 1
- 230000004992 fission Effects 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010353 genetic engineering Methods 0.000 description 1
- 238000012248 genetic selection Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 229960003711 glyceryl trinitrate Drugs 0.000 description 1
- 239000001963 growth medium Substances 0.000 description 1
- 239000003721 gunpowder Substances 0.000 description 1
- 229940059442 hemicellulase Drugs 0.000 description 1
- 108010002430 hemicellulase Proteins 0.000 description 1
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 229910052741 iridium Inorganic materials 0.000 description 1
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 description 1
- HFGPZNIAWCZYJU-UHFFFAOYSA-N lead zirconate titanate Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ti+4].[Zr+4].[Pb+2] HFGPZNIAWCZYJU-UHFFFAOYSA-N 0.000 description 1
- 229910052451 lead zirconate titanate Inorganic materials 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 239000004200 microcrystalline wax Substances 0.000 description 1
- 235000019808 microcrystalline wax Nutrition 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 239000000615 nonconductor Substances 0.000 description 1
- 229910052762 osmium Inorganic materials 0.000 description 1
- SYQBFIAQOQZEGI-UHFFFAOYSA-N osmium atom Chemical compound [Os] SYQBFIAQOQZEGI-UHFFFAOYSA-N 0.000 description 1
- 238000005453 pelletization Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- 239000006223 plastic coating Substances 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000003380 propellant Substances 0.000 description 1
- 239000011253 protective coating Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000002455 scale inhibitor Substances 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 239000011359 shock absorbing material Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000007901 soft capsule Substances 0.000 description 1
- 210000004215 spore Anatomy 0.000 description 1
- 230000028070 sporulation Effects 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- ISXSCDLOGDJUNJ-UHFFFAOYSA-N tert-butyl prop-2-enoate Chemical compound CC(C)(C)OC(=O)C=C ISXSCDLOGDJUNJ-UHFFFAOYSA-N 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 230000036962 time dependent Effects 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 150000003673 urethanes Chemical class 0.000 description 1
- 239000012138 yeast extract Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/516—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls characterised by their form or by the form of their components, e.g. encapsulated material
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
- C09K8/536—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning characterised by their form or by the form of their components, e.g. encapsulated material
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/62—Compositions for forming crevices or fractures
- C09K8/70—Compositions for forming crevices or fractures characterised by their form or by the form of their components, e.g. foams
- C09K8/706—Encapsulated breakers
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/92—Compositions for stimulating production by acting on the underground formation characterised by their form or by the form of their components, e.g. encapsulated material
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
- E21B43/263—Methods for stimulating production by forming crevices or fractures using explosives
Definitions
- the present disclosure generally relates to the delivery of materials into oil well reservoirs.
- Fiammante FR2548558, describes powdered products coated with a wax that melts at formation temperatures.
- Jacobs US4770796, uses an encapsulated breaker for cross-linked aqueous acid-polymer gel compositions containing the same and a method for using such compositions in fracture acidizing.
- Manalastas, US5102558 relates to encapsulated breaker chemicals which are used in a process for forming and enlarging fractures in a subterranean formation in oil well stimulation operations.
- Fodge US5551515, provide a hemicellulase that displays substantial biological activity under conditions of high temperature and high alkalinity.
- Ellis, US5604184 provide a resin system for coating proppants to use in hydraulic fracturing applications, for controlling the set time of resin-coated proppants in fractures, even at high temperatures, and for minimizing proppant flowback.
- Irwin, US6225262 provide encapsulated breakers in a slurry.
- Freeman, US6818594 developed active, and particularly catalytic, agents that can be made inert and remain inert under shear, temperature and prolonged exposure.
- Norman, US5373901 and US6357527 relates to a method for controllably breaking an aqueous based fracturing fluid utilized to stimulate a subterranean formation.
- Youngman, US6372678, provides preparing a spherical ceramic proppant pellet from spent fluid cracking catalyst particles.
- Murthy, WO2007002690 uses encapsulation and triggered- release of water-soluble or water-dispersible materials useful for controlled viscosity reduction.
- Rediger, US20080011477 uses thermoplastic materials as a coating on particulates (proppants). The thermoplastic coating provides the proppant with latent tackiness, such that the tackiness of the coating does not develop until the proppant is placed into the hydrocarbon-bearing formation.
- Barmatov, WO2009078745 provides a polymeric material for releasing a substance into a downhole fluid environment in a well.
- the material comprises a spherical, plastic chemical release capsule which is hard, permeable and may encapsulate a range of solids and/or liquids for subsequent release, including scale inhibitors.
- Pershikova WO2009134159, teaches a sintered spherical pellet ceramic proppant, prepared from a precursor mixture that includes alumina, and a second component that is a boron source.
- Willberg, WO2009079231 and WO2009792344 use a fluid composition comprising a multi-component article dispersed in a carrier fluid, the core having a softening point of at least 130°C; an outer sheath that is at least one of (a) inert relative to the carrier fluid or (b) degradable under the subterranean formation conditions; and an intermediate sheath positioned between the core and the outer sheath, the intermediate sheath having a softening point up to 130°C.
- Heath, US7196040 provides a substance release device comprising a polymeric material for releasing a substance into a downhole fluid environment in a well.
- Barron, US20090288820 describe a proppant having functional features beyond serving to "prop" open fractures in a subterranean rock formation.
- Bicerano, US20100038083 use a composite proppant compositions comprising from approximately 0.001% to approximately 75% by volume of a coating whose electromagnetic properties change under a mechanical stress such as the closure stress of a fracture, the electromagnetic properties are detected by means of any suitable technique, to track and monitor the locations of the proppants.
- the invention more particularly provides a method of delivering highly sensitive, mechanical, biological and chemical agents to subterranean formations.
- a rigid, impermeable capsule is used to deliver a variety of treatments to a subterranean formation.
- materials are delivered to a subterranean reservoir by encapsulating one or more materials in a protective capsule, injecting the encapsulated material into a subterranean formation; and injecting an activator to open the encapsulated material; and activating the encapsulated material.
- the protective capsule forms an impermeable shell protecting the encapsulated material during delivery to the subterranean formation.
- materials are delivered to a subterranean reservoir by encapsulating one or more materials in a first protective capsule, encapsulating one or more materials in a second protective capsule, injecting the first and second capsules materials into a subterranean formation, and activating the encapsulated materials.
- the protective capsules form an impermeable shell protecting the encapsulated material during delivery to the subterranean formation.
- materials are delivered to a subterranean reservoir by encapsulating one or more materials in a first protective capsule, coating the first protective capsule with one or more materials, encapsulating the entire pellet in a second protective capsule, injecting the encapsulated materials into a subterranean formation, and activating the encapsulated materials.
- the second protective capsule forms an impermeable shell protecting the encapsulated material during delivery to the subterranean formation.
- the encapsulated material can be one or more micro-machines, biological materials, explosives, foams, adhesives, chemo-active materials and the like.
- the protective capsule may be made with one or more hard waxes, polypropylenes, polyethylenes, nylons, vinyls, Teflon, glass, plastics, thermoplastics, rubbers, varnish, paints, cellulose, lignins, starches, polymers, conductive polymers, metals, electrically active materials, and the like.
- the protective capsule can be one or more layers applied as a spray mist, drop coating, electrostatic coating, thin film, extrusion, and the like.
- the encapsulated material can be components of a binary explosive with a fuel including aluminum, aluminum and sulfur, aluminum and iron oxide, aluminum and magnesium, aluminum and charcoal, cellulose, charcoal, charcoal and sugar, charcoal and sulfur, coal, coal and lignin, coal and starch, coal and sugar, glycerine, iron, iron and aluminum, lignin, magnesium, magnesium and sulfur, phosphorus sesquisulfide, polyvinylchloride (PVC), starch, sugar, sugar and aluminum, sugar and charcoal, sugar and magnesium, sulfur, sulfur and aluminum, sulfur and magnesium, sulfur and starch, zinc, zirconium hydride, combustible powder, fuel oil, nitromethane, nitroethane, and mixtures thereof; and an oxidizer including oxides, peroxides, nitrates, perchlorates, permanganates, chromates, dichromates, bromates, iodates, magnesium oxide (Mg0 2 ), ammonium perchlorate, barium
- the encapsulated material can be components of an adhesive with an adhesive resin including polyester, vinylester, urethane, polyurethane, rubber, acrylic, cyanoacrylate, epichlorohydrin, and the like; and a hardener including polyamines, bisphenol-A, triethylenetetramine (TETA), diethylenetetramine (DETA), and the like.
- an adhesive resin including polyester, vinylester, urethane, polyurethane, rubber, acrylic, cyanoacrylate, epichlorohydrin, and the like
- a hardener including polyamines, bisphenol-A, triethylenetetramine (TETA), diethylenetetramine (DETA), and the like.
- the encapsulated material can be a biological agent selected from the group consisting of an Archae, Bacteria, yeast, Ascomycota, unicellular organisms, Escherichia, E. coli, Clostridia, C. acetobutylicum, Candida albicans, Saccharomyces cerevisiae, S. Pombe, C. difficile, C. perfringens, A.
- a biological agent selected from the group consisting of an Archae, Bacteria, yeast, Ascomycota, unicellular organisms, Escherichia, E. coli, Clostridia, C. acetobutylicum, Candida albicans, Saccharomyces cerevisiae, S. Pombe, C. difficile, C. perfringens, A.
- the encapsulated material can be a micro electro mechanical system with a radio-frequency transmitter, gravitometer, magnetometer, piezoelectric device, accelerometer, Peltier heating element, pH meter, thermometer, thermocouple, pressure sensor, inertial sensor, detonator, battery, a microchip with an antennae, a microchip with a battery and antennae, a microchip with a receiver and transmitter, a microchip with a receiver, transmitter and a battery, and combinations of these systems.
- Two or more encapsulated materials can be injected simultaneously.
- a detonator MEMS system may be injected with an explosive to achieve detonation in situ
- a pH meter MEMS system may be injected with a biological agent to monitor pH during biodegradation
- a thermometer MEMS system may be injected with an adhesive to monitor curing temperatures.
- Johnston, US3958638 provides an aqueous solution of a polymer that can be crosslinked to produce a gel that is passed through a wellbore and into the formation along with an encapsulated gelation agent in sufficient quantities to cause gelling of the polymer upon contact.
- Swanson, US4246124 uses gelled compositions that are stable and have gelation rates that can be controlled by the choice of phenolic compounds.
- Moradi-Araghi US6387986, describes an encapsulated crosslinking agent and methods of Cramer and associates, US20100147512, use electrically active (EA) proppants, activate the EA proppants using a controlled electric source, and detect the electromagnetic (EM) signal with a surface antennae to determine the precise location of an artificially induced fracture in a subsurface reservoir.
- EA electrically active
- EM electromagnetic
- Capsule is a solid envelope that encloses a separate compartment containing the material to be delivered to the subterranean formation.
- the capsule may be constructed or applied by spray mist, extrusion, extrusion coating, or other method.
- the capsule must be sufficient to provide both physical resistance to pressure and prevent release of capsule contents until released in formation.
- the capsule contains multiple compartments with a variety of encapsulated materials.
- the capsule contains an inner, shock absorbing material and a hard outer shell similar to a chicken's egg.
- Capsule envelope comprises polypropylene, polyethylene, nylon, vinyl, Teflon, plastics, thermoplastics, rubber, varnish, paint, cellulose, lignin, starches, conductive polymers, metal, and electrically active materials. Capsule materials will vary greatly and are dependent upon the use and unique requirements for the encapsulating material encountered during delivery and in situ.
- Capsule size may range from the size of a grain of sand to approximately golf ball sized, or from approximately 0.1 millimeters or about 4/1000ths inch to about 50 millimeters or approximately 2 inches in diameter. Capsules may require one or more layers to prevent early release due to shear forces, temperatures, and conditions encountered during transport, pumping, fracturing, and other processes with the encapsulated materials.
- Encapsulated materials include micro-machines, biological materials, explosives, foams, adhesives, chemo-active materials and the like.
- Micro-machines include vibrators, heaters, detonators, radio emitters, piezoelectric materials, microchips, gravitometers, accelerometers, antennae, batteries, and the like.
- Nuclear decay, fusion or fission may be used in situ to generate a detectable signal, pressure, heat, or combinations thereof. Additionally, nuclear activity may degrade the capsule and release the contents in a time dependent manner.
- a capsule contains a sensitive material and has a protective coating.
- one or more capsules contain at least one or more compartments, each with one half of a binary complex.
- a capsule may contain an explosive, adhesive, foaming agents, hygroscopic material, mechanical device, and the like.
- two capsules may each contain one half of a binary explosive, adhesive, foaming agent, crosslinking reagent, or other chemical reaction.
- one capsule may contain two or more compartments each compartment containing a separate ingredient for a binary explosive, adhesive, foaming agent, crosslinking reagent, or other chemical reaction.
- Soft wax and hard wax coatings can be created by modifying the ratio of ingredients in the coating material.
- a wax coating contains paraffin, hydrocarbon wax, microcrystalline wax, oils, solvents, hardeners, and other modifiers that can be used to change the properties of the wax including hardness, melting point, and other qualities.
- Hardness is the firmness produced by cohesion of the wax as evidenced by its inflexibility or resistance to indentation, distortion, or scratching. Fatigue and resistence to cracking may also be influenced by the materials in the wax.
- a soft wax coating under one set of conditions may behave as a hard wax coating for other conditions.
- a hard wax coating is created at cooler temperatures, the coating becomes pliable at higher temperatures, and even be liquefied at a higher temperature.
- the wax coating may be spray misted onto the material or pellet to be encapsulated then cooled to form a hard wax capsule that softens and melts at reservoir temperatures.
- Explosive materials deflagrate or explode after ignition or detonation including fulminated mercury, nitroglycerine, dynamite, plastic explosives, binary explosives, and the like.
- the reaction of explosives and deflagrants (fuels) may be controlled by the rate of combustion, materials contained in the mixture, presence and rate of oxygen production, shape of the material, surface area of the material, pressure under which the reaction is initiated, and many other factors.
- Explosives detonate at supersonic speeds, creating an expansion shock wave.
- Deflagrants decompose at subsonic speeds providing a more controlled release of energy and heat. Decreased pressure, temperature, diffusion and other conditions may decrease the speed of reaction and cause an explosive to deflagrate.
- Binary explosives comprise a separate fuel source and a separate oxidizer with optional fillers.
- Commonly known binary explosives include liquid oxygen/combustible powder (Oxyliquit), ammonium nitrate/fuel oil (ANFO), ammonium nitrate/nitromethane (Kinestik), ammonium nitrate/aluminum (Tannerite, US6848366), nitroethane/physical sensitizer (FIXOR) and other explosive combinations of fuel and oxidizer.
- Deflagrants include gunpowder, black powder, propellants, cordite, carbon, sulphur, epoxies, rubbers, sugars, magnesium, zinc, iron, aluminum and plastics.
- Metals, charcoal, coal, sugar, starches, plastics, and the like may be atomized, dust, fine mesh, coarse mesh, powder, or a variety of grain sizes dependent upon the surface area required, desired properties, and materials used.
- Fuels include aluminum, aluminum and sulfur, aluminum and iron oxide, aluminum and magnesium, aluminum and charcoal, cellulose, charcoal, charcoal and sugar, charcoal and sulfur, coal, coal and lignin, coal and starch, coal and sugar, glycerine, iron, iron and aluminum, lignin, magnesium, magnesium and sulfur, phosphorus sesquisulfide, polyvinylchloride (PVC), starch, sugar, sugar and aluminum, sugar and charcoal, sugar and magnesium, sulfur, sulfur and aluminum, sulfur and magnesium, sulfur and starch, zinc, zirconium hydride, and mixtures thereof.
- the deflagrant fuel may also be the encapsulating material providing both a hard outer shell and a fuel for reaction with oxygen.
- Oxygen releasing compounds include oxides, peroxides, nitrates, perchlorates, permanganates, chromates, dichromates, bromates, iodates, and the like.
- a catalyst may be supplied with the oxygen releasing compound to increase the rate of oxygen production, promote release of the oxygen, or to drive the oxygen release reaction to completion.
- Proprietary oxygen releasing compounds are commercially available and include ORC ® (Regenesis, San Clemente, California), ORC ® Advanced (Regenesis), EHC-O ® (Adventus Group, Freeport, Illinois), O-Sox ® (Adventus), EZ-Ox ® (Geovation Engineering, P.C., Florida, New York) and many others.
- Oxygen releasing compositions may be purchased in bulk for a variety of applications from aquaculture and bioremediation to in-flight and hospital oxygen supplies.
- Multipart adhesives use a resin and a hardener or catalyst to form an adhesive material with a variety of expansion properties, hardening rates, and porosities.
- a variety of resin/hardener combinations are available including epoxy resins and amine hardeners.
- Adhesive resins include polyesters, vinylesters, urethanes, polyurethanes, rubbers, acrylics, cyanoacrylates, epichlorohydrin, and the like.
- Hardeners and catalysts include polyamines, bisphenol-A, triethylenetetramine (TETA), diethylenetetramine (DETA), and the like .
- Silver-filled epoxies can be used as an electrical conductor, but most adhesives are typically electrical insulators.
- Fillers and additives may be used to modify the properties of the adhesive including flexibilizers, viscosity reducers, colorants, thickeners, accelerators, adhesion promoters, and the like including talc, silica, alumina, (Handbook of epoxy resins, Lee and Neville).
- biological agents which include whole cells, cellular extracts, enzymes, and other biological complexes would be delivered to the reservoir by encapsulation.
- Whole cells are living or sporulated biological cells that may include Escherichia such as E. coli, Clostridia such as C. acetobutylicum, yeast such as Candida albicans and Saccharomyces cerevisiae, and other unicellular and multicellular organisms.
- Unicellular organisms particularly Archae, Bacteria, Ascomycota, including many extremophiles, iron-reducing bacteria, denitrifying bacteria, sulfate-reducing bacteria, Desulfovibrio, Desulfobacteriaceae, and the like are easily manipulated and may thrive under a variety of pressures, temperatures, and conditions experienced during delivery or in situ.
- Bacteria may be selected for the products produced, like acetobutylicum, methanobacteria, methanobaccilus, methanococcus, methanosarcina, and the like
- Commercially available Archae, Bacteria and Yeast are frequently manipulated either through genetic engineering, selection or natural life cycles to form spores, salt resistent, temperature resistant and combination strains that can be used in situ to perform a variety of functions including bioremediation or degredation of larger bitumens and tars into smaller fuel length hydrocarbons.
- NCBI National Center for Biotechnology Information
- ATCC American Type Culture Collection
- EBI European Bioinformatics Institute
- micro-machines are protected with protective capsules for delivery in situ. Care is taken when encapsulating micro-machines to ensure the encapsulation process does not damage the micro-machine and materials used do not damage the micromachine.
- a radio-frequency transmitter, gravitometer, magnetometer, piezoelectric device, accelerometer, peltier heating element, pH meter, thermometer, pressure sensor, inertial sensor, and other micro electro mechanical systems (MEMS) individually or interconnected to perform various actions in situ.
- Wireless transmitters are available from a variety of sources that interact directly with a variety of sensors to convert detected changes into radio signals and with very low voltage requirements.
- a power source may be provided in the well bore, MEMS within the formation may be powered from the well bore power source through electrical induction.
- the pellet itself is a micro- machine.
- a magnetic material is encased in a wax pellet, then coated with a polyethylene, Teflon, or other hard exterior. At formation temperatures, the wax melts and the magnetic core may be vibrated at various frequencies with changing electromagnetic pulses. The in situ seismic signal is then detected at the surface using standard geophones.
- a micro-detonator is encapsulated in an explosive material with a hard impermeable shell.
- Several micro-detonators dispersed through one or more of the above referenced explosive systems provide an ignition system that can ignite all of the explosive throughout the formation simultaneously.
- an encapsulated product is injected with proppant into a new fracture.
- the capsule is injected with water during normal waterflooding procedures.
- Protective capsules are designed to be chemically, thermally, or electrically degraded releasing the contents of the capsule rapidly and without damage to the contents of the capsule.
- the protective capsule is ruptured by formation closure.
- Example 1 In situ explosive capsules
- Delivering explosives to a formation can be risky. Explosives can detonate accidentally, get damaged during handling, or become disoriented during delivery. Downhole, explosives are typically delivered in the well bore and do not penetrate to a great extent into the formation. To improve explosive delivery to the formation, a binary explosive can be encapsulated within impermeable capsules that do not rupture prematurely and remain sealed until released by conditions within the formation.
- an aluminum powder is pressed with paraffin to generate an aluminum powder pellet.
- the aluminum powder pellet is spray mist coated with one or more coats of a hard varnish or polyurethane encapsulating material.
- Aluminum nitrate is packaged separately in a polypropylene pellet.
- the aluminum nitrate powder pellet is coated with one or more coats of hard polypropylene or polyethylene to generate an encapsulated pellet.
- the aluminum powder pellet and aluminum nitrate pellet can then be mixed and handled without risk.
- the two pellets may be transported separately and mixed immediately prior to delivery.
- the density and size of the pellets may be regulated to obtain a similar size distribution, density and transportation characteristics.
- the pellets are delivered with a fracture fluid that is maintained below the melting point of the varnish, polypropylene, and paraffin. After the pellets have penetrated the formation the temperature may be increased or a solvent may be delivered, allowing the aluminum and aluminum nitrate to mix deep within the formation. Application of heat, friction or electrical spark can ignite the Tannerite. A detonator within the well bore can initiate the explosion which will propagate through the formation to all of the mixed aluminum and aluminum nitrate.
- the aluminum powder pellet is mixed with dark flake aluminium powder, Titanium powder and zirconium hydroxide.
- 90% 600-mesh dark flake aluminium powder, 5% 325-mesh Titanium sponge and 5% 200-mesh zirconium hydroxide are used to create pellets that are subsequently coated with a hard, impermeable wax.
- the aluminum nitrate may be a mixture of ammonium nitrate and ammonium perchlorate.
- the aluminum nitrate pellet contains 85% 200-mesh ammonium nitrate and 15% ammonium perchlorate. Ratios of explosive and oxidizer can be optimized for formation properties including temperature, pressure, and hydrocarbons present.
- a single pellet is manufactured that contains an exact ratio of reactant and catalyst/oxidizer.
- a pellet of FIXORTM flammable liquid is cooled below freezing and coated with a hard wax.
- FIXOR is made up of two parts, a flammable liquid (FIXOR Liquid, U.N. 2842, NSN 1375-21-920-4587) and unreactive powder (FIXOR Powder, NSN 1375-21-920-4638).
- the wax pellet is coated with FIXORTM dry powder mixed with a soft wax.
- the entire pellet is then coated with a hard wax or polyurethane.
- the paraffin wax Once pumped into the formation, the paraffin wax will melt, dispersing the FIXORTM powder within the liquid to create an explosive. Once detonated through electrical shock, electrical detonators, detonation cord or other detonation method, the explosion will propagate throughout the formation. Undetonated FIXOR with deactivate over time removing the risk of accidental detonation during subsequent formation treatments.
- deflagration may be used to heat the formation rapidly in a controlled manner.
- a flammable material and an oxygen source as described above either in individual capsules delivered simultaneously or as an interior capsule and an outer coating.
- the oxygen source may either be on the exterior of the dual layer pellet or on the interior with the deflagration agent on the surface.
- the rate of oxygen release can control the rate of phosphorous combustion thus controlling the heat of the reaction.
- Pelletizing polypropylene powder with sodium chlorate and iron powder creates an oxygen generating bead.
- Deflagrants may be corned into small spherical balls or extruded into cylinders or flakes. The properties of the deflagrant are greatly influenced by the size and shape of its grains.
- the surface of the grains influences the speed of burning, and the shape influences the surface and its change during burning.
- By selection of the grain shape it is possible to influence the pressure vs time curve as the deflagrant burns.
- Combining the oxygen generating bead with the extruded deflagrant in a hard wax mixture provides a sustainable burning material that can be used to increase formation temperature rapidly in a controlled manner. Ignition of the beads surrounding the bore hole will provide heat and ignition for the adjacent beads, allowing the deflagration reaction to propagate throughout the formation. Because the reaction is slowed, each bead igniting adjacent beads, the pressure can be released, maintained or allowed to increase as the reaction progresses simply be releasing or retaining pressure at the well bore.
- combinations of fuel and oxidizer may be delivered in separate sealed compartments and activated in situ.
- Activation in situ means the explosives are easier to handle and damage to the materials, moisture, and the like can be prevented until the capsules are activated and the explosives are ignited. This provides a more active composition that is protected from the environment and can be injected deep into the formation
- a binary chemical reaction can be used exsolve a foaming adhesive within the formation.
- a pellet comprising commercially available Gorilla GlueTM in a cellulose gel capsule is coated with a hard wax coating.
- the pellets are mixed with the fracturing fluid. If the fracturing fluid is aqueous, it should be kept below the melting temperature of the hard wax coating.
- the appropriate ratio of aqueous solution and Gorilla GlueTM are then delivered to the reservoir. Under the heat of the reservoir, the wax melts, the cellulose dissolves in the aqueous solution, and the Gorilla GlueTM is released. Once released, the glue is activated in aqueous solution.
- a two-part structural adhesive is prepared by extruding thermoplastic pellets filled with liquid urethane.
- a second thermoplastic pellet is filled with liquid TETA.
- the thermoplastic pellets which may be a variety of colors, are mixed to achieve a desired ratio of urethane and TETA which can vary greatly dependent upon the final properties desired. The mixed pellets are injected with a fracture fluid until the desired fracture pressure is reached.
- thermoplastic pellets Once fracture pressure is achieved, the formation is sealed and the temperature of the thermoplastic pellets increases until the urethane and TETA are released. Upon mixing the urethane and TETA expand, generating heat and pressure causing more thermoplastic pellets to rupture while maintaining fracture pressures for an extended period. Once the urethane is set, the pressure may be released and the fractures are maintained by the foamed adhesive and incorporated thermoplastic materials.
- Biological materials may be packaged using care when generating the protective capsules. Once the capsules are delivered, the biological material may be released and activated in situ to achieve desired byproducts, convert the heavy oils and bitumens into lighter oils and fuels that can be more easily produced.
- Species like acetobutylicum can live in an oxygen free environment (anaerobic) and will survive in the formation dependent upon the nutrients that are available or supplied.
- S. cerevisiae may live in either an aerobic or anaerobic environment producing different products dependent upon the growth conditions. E. coli will undergo rapid growth with oxygen (aerobic) generating products while oxygen is present but will grow more slowly or go dormant once oxygen is depleted.
- C. acetobutylicum containing a cellulase selection vector is grown to density under anaerobic conditions with a cellulose carbon source.
- On the cellulase selection vector is one expression construct (promoter and open reading frame) comprising the cellulase gene and one expression construct comprising the one or more alkane response (alk) genes.
- alkane response (alk) genes Alternatively, C. difficile, C. perfringens, A. baumannii or other known species may be similarly prepared dependent upon the growth characteristics required in situ.
- One or more genes may be expressed from either native genes or expression vectors.
- the expression vector may be selectable, as in the cellulase/alkane construct described above, or it may be incorporated through recombination into the genome.
- the cells above are grown to density and sporulation is induced.
- the sporulated cultures are dried, powdered, and mixed with growth media before encapsulation in a cellulose shell.
- the hard cellulose shell is permeable to aqueous solutions, but impervious to exterior pressures and shear forces.
- the bacterial spores are completely protected until the cellulose pellets are exposed to an aqueous solution.
- the cellulase enzyme in the bacteria degrades the hard shell, and the alkane expressing acetobutylicum can begin degrading long alkane chains in tar and bitumen formations.
- a mutated Desulfobacteriaceae is selected for temperature, pressure, and acid resistance.
- the selected bacteria is grown to density, pelleted, and resuspended in a 10% glycerol solution.
- the resuspended cells are quickly freeze dried in a lyophilizer and subsequently powdered.
- the powdered cells are mixed with nutrients, a powdered yeast extract or LB broth, and packed into capsules.
- These soft capsules are then coated in material with a protective, water resistant, outer shell, either a urethane or hard wax.
- the coated particles may be mixed with fracturing fluid or other delivery solution that does not appreciably dissolve the hard shell during the delivery process.
- the hard shell will protect the cells inside the capsule during delivery, like an egg. These materials would be delivered to the well site, once delivered to the subterranean reservoir, pressure within the reservoir is reduced and the compacting formation will apply uneven pressure to the hard shell, cracking the hard shell. This leaves the soft, water soluble capsule exposed to any aqueous solutions within the formation.
- the capsule dissolves and the biological agent, resistant Desulfobacteriaceae, is activated in situ.
- biological agents at depth can be used to convert heavy oils to lighter agents and fuel oils.
- Desulfobacteriaceae digest alkanes within tar layers producing smaller fuel grade byproducts.
- the field of biological agents is very broad, so these examples are merely demonstrative examples of the principals involved. They are not construed to be an exhaustive list of uses.
- Micro-mechanical devices are available in a variety of formats to achieve a variety of functions.
- a MEMS device may be designed for use in situ that accounts for formation conditions, delivery conditions, desired activity and other factors.
- a MEMS chip is synthesized with a wireless radio receiver/transmitter and a sensor. Once the microchip is designed and synthesized, the wafer containing one or more microchip, typically hundreds of microchips, is cut and the individual chips may be packaged. In one embodiment the chips are wrapped in a soft wax to protect the circuitry and allow the wax to be shaped without damage.
- a hard shell is applied to the outer wax, the hard shell may be a spray mist of urethane or the sensor may be encased in Teflon to create an impervious shell.
- the microchip is encased in Teflon while the membrane sensor is encased in a hard wax. Once in situ, the hard wax melts, exposing the sensor membrane to the formation conditions.
- a batch of pH sensitive sensors is synthesized where each microchip comprises a wireless receiver/transmitter, a pH sensitive membrane and a small in-board battery.
- Hundreds or thousands of sensors may be assembled on one or more wafers, reducing costs while increasing reproducibility.
- the microchip and electrical components of the sensor are protected in a rubber, polypropylene, Teflon, or other plastic coating.
- the membrane is protected with a soft wax coating.
- the entire device is coated with a hard wax layer. The hard wax and soft wax having a relatively low melting point below formation temperature, yet the melting point is higher than the waterflooding solution.
- One or more of the sensors may be calibrated to formation conditions by placing the sensor at in waterflooding solution and increasing the temperature and pressure to that of the formation.
- the pH is then recorded at one or more known pH standars, the pH standards in some cases are above and below the maximum and minimum pH values to be measured in situ.
- One or more pH sensors may be delivered in situ to assess waterflooding conditions. After delivery of the pH sensors to the formation, the temperature of the waterflood solution may be raised above the melting point of the wax coating. Waterflooding may then progress until a desired pH is measured throughout the formation.
- a temporary or permanent relay may be placed in the wellbore to receive measurements from the pH sensors in the formation. The pH may be modified and monitored over a period of time as formation treatments change.
- a temperature sensitive sensor is designed with a thermocouple, a wireless receiver/transmitter, a small in-board battery.
- a thermocouple As described above, hundreds or thousands of microchips may be manufactured on one or more wafers. As previously stated, decreasing size increases reliability while decreasing costs. Because the thermocouple does not need to be exposed to measure temperature, the entire microchip may be encased in a Teflon or glass coating through an extrusion or deposition process. The protected thermocouple may be delivered in situ with other sensors to monitor a wide range of temperatures.
- the thermocouple may be encased in a durable ceramic shell that can withstand pyrolysis temperatures used in some thermal production methods like SAGD, VAPEX, in situ combustion, and the like. In some cases the entire thermocouple and wireless transmitter should be manufactured out of high temperature resistant materials. In other systems, a battery may not be used and instead the thermocouple and wireless transmitter respond passively to radio frequency transmissions.
- lead zirconate titanate crystals are electroplated with a conductive material, gold, gold/palladium alloy, platinum, osmium, iridium, tungsten, chromium, graphite, or the like.
- a second wax coating impregnated with graphite, or other conductive material is layered on the electroplated piezoelectric crystals. Once protected the electroplated crystals are injected into the wellbore. An electrical charge is applied with varying frequency and a signal is generated within the reservoir. Alternative, the piezoelectric material is vibrated rapidly, generating frictional heat.
- micro-machines, explosives, adhesives, and/or biological materials may be injected simultaneously to achieve active systems in situ.
- a micro- detonator comprising a detonation circuit and explosive as desribed above is injected with the components of a deflagrant and a temperature resistant thermocouple.
- the explosive can be ignited and temperature monitored simultaneously ensuring that the explosive is completely detonated and the entire formation has reached a sufficient temperature.
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Abstract
La présente invention concerne des matériaux qui sont distribués dans des réservoirs de puits de pétrole. Des agents mécaniques, biologiques et chimiques très sensibles peuvent être distribués dans des formations souterraines avec des capsules imperméables rigides. Différents traitements peuvent être distribués dans une formation souterraine.
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US37310710P | 2010-08-12 | 2010-08-12 | |
US61/373,107 | 2010-08-12 | ||
US13/197,879 US20120037368A1 (en) | 2010-08-12 | 2011-08-04 | Controlled release proppant |
US13/197,879 | 2011-08-04 |
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WO2012021373A1 true WO2012021373A1 (fr) | 2012-02-16 |
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WO2014049018A1 (fr) * | 2012-09-27 | 2014-04-03 | Wintershall Holding GmbH | Composition coulante, procédé pour la fabriquer, ainsi que procédé de fracturation d'une formation souterraine en utilisant cette composition coulante |
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GB2532884A (en) * | 2013-08-27 | 2016-06-01 | Halliburton Energy Services Inc | Encapsulated explosives for drilling wellbores |
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