WO2014090633A1 - Dispositif et procédé de stimulation et de nettoyage d'un trou de forage rempli de liquide - Google Patents

Dispositif et procédé de stimulation et de nettoyage d'un trou de forage rempli de liquide Download PDF

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Publication number
WO2014090633A1
WO2014090633A1 PCT/EP2013/075369 EP2013075369W WO2014090633A1 WO 2014090633 A1 WO2014090633 A1 WO 2014090633A1 EP 2013075369 W EP2013075369 W EP 2013075369W WO 2014090633 A1 WO2014090633 A1 WO 2014090633A1
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WO
WIPO (PCT)
Prior art keywords
combustion chamber
container
chamber
fuel
inflow opening
Prior art date
Application number
PCT/EP2013/075369
Other languages
German (de)
English (en)
Other versions
WO2014090633A9 (fr
Inventor
Vladimir Stehle
Konrad Siemer
Original Assignee
Wintershall Holding GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wintershall Holding GmbH filed Critical Wintershall Holding GmbH
Priority to EP13799295.4A priority Critical patent/EP2932025A1/fr
Priority to RU2015127890A priority patent/RU2015127890A/ru
Priority to US14/442,841 priority patent/US20150292287A1/en
Priority to CA2893313A priority patent/CA2893313A1/fr
Publication of WO2014090633A1 publication Critical patent/WO2014090633A1/fr
Publication of WO2014090633A9 publication Critical patent/WO2014090633A9/fr

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Classifications

    • 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
    • E21B27/00—Containers for collecting or depositing substances in boreholes or wells, e.g. bailers, baskets or buckets for collecting mud or sand; Drill bits with means for collecting substances, e.g. valve drill bits
    • 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
    • E21B37/00—Methods or apparatus for cleaning boreholes or wells
    • 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
    • E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
    • E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
    • E21B43/243—Combustion in situ
    • E21B43/247—Combustion in situ in association with fracturing processes or crevice forming processes

Definitions

  • the present invention relates to a device for cleaning a fluid-filled well comprising a tubular container, inside which at least one combustion chamber and at least one hollow chamber are arranged, which are arranged one behind the other in the longitudinal direction, wherein the combustion chamber at least partially filled with a fuel and having an igniter, and wherein the container has at least one inflow opening through which borehole fluid can flow from the outside into the container. Furthermore, the invention relates to a method for stimulating and cleaning a liquid-filled borehole using the device according to the invention.
  • the porous rock strata may silt during the drilling and cementing process, decreasing permeability.
  • the state of stress, compression and deformation of the rock changes, which causes zones of increased density and low permeability to form around the borehole in a circle around the borehole.
  • paraffin, asphaltenes and high viscosity tars often deposit in the rock, reducing the productivity of the well.
  • perforation technologies various perforation technologies, vibration and heat treatment, the use of chemically active substances and swabbing.
  • One type of perforation technology uses gas generators that run on solid fuels.
  • the devices are designed as jacketed or uncovered explosive charges and produce hot gases after ignition, resulting in a pressure increase in the borehole and the adjacent rock layers.
  • gas generators are used in the borehole at the level of winninghorizonte to cause due to the pressure increase new perforations in the rock or to expand existing perforations.
  • the device includes tubular cylindrical explosive charges, ignition charges, and a geophysical cable, a so-called logging cable, with explosive charge fasteners. When burning the cylindrical explosive charges in the borehole carried a thermo-chemical Treatment and air pressure treatment of the rock.
  • Document RU 2178065 C1 discloses another gas generator which is used in fluid-filled wells.
  • the gas generator contains fuel charges which, when burned, generate hot gas that escapes into the wellbore fluid surrounding the gas generator.
  • the liquid is heated and begins to boil.
  • valves on the inflator are opened so that fluid can quickly flow into its hollow interior. This causes a rapid pressure drop in the already boiling liquid, so that it comes to explosive evaporation of the liquid.
  • the document RU 221 1313 C1 also describes a hollow gas generator which is intended, after a thermo-chemical treatment of the surrounding borehole liquid, to take these into its hollow interior.
  • the interior of this gas generator is divided by membranes into several chambers.
  • the well fluid first flows into a first chamber. Due to the building up pressure, the membrane is destroyed, and the liquid flows into the next chamber. This results in a sequence of pressure surges that leads to the formation of new and enlarged cracks and holes in the rock.
  • the object was to provide a device and a method for well stimulation by means of which the permeability of the rock around a region of the well can be targeted and efficiently improved.
  • the device should be simple in construction and inexpensive to manufacture.
  • the device according to the invention for cleaning a liquid-filled borehole comprises a tubular container in the interior of which at least one combustion chamber and at least one hollow chamber are arranged, which are arranged one behind the other in the longitudinal direction, wherein the combustion chamber is at least partially filled with a fuel and has an igniter up.
  • the container has at least one inflow opening through which borehole fluid can flow from the outside into the container.
  • the at least one inflow opening is provided with a closure device which comprises at least one closure element which, in the case of overflow stepping a predetermined temperature loses its strength, so that the closure device opens.
  • the method according to the invention for stimulating and cleaning a fluid-filled borehole comprises the following steps:
  • the container is preferably attached to a geophysical cable, also referred to as a "logging cable.” With the aid of which, the container can be lowered by known means such as a winch from the surface of the bore into the well and removed therefrom.
  • step (a) the device is positioned in the borehole in such a way that the combustion chamber is located at the level of the perforation region of the conveying horizon.
  • the perforation area is understood here and below to mean the area of a conveying horizon in which perforation holes and perforation channels are already present.
  • the axial extent of the perforation region corresponds to the thickness of the rock layer from which the fluid, e.g. Oil or natural gas, to be promoted.
  • step (c) the device is positioned in the borehole such that the at least one inflow opening is located at the level of the perforation region of the conveying horizon.
  • step (c) is initiated only after the temperature of the outer wall of the device according to the invention has cooled in the region of the at least one combustion chamber to the boiling temperature of the borehole liquid in this area.
  • the time interval between the ignition of the fuel in the combustion chamber and the cooling of the outer wall below the boiling temperature of the borehole liquid can be estimated before the device is used. An exact temperature determination is not required.
  • the tubular container may be made in one piece or in several parts. Its outer wall is made of a material that can withstand the pressure and temperature loads during the combustion of the fuel. The choice of material and design parameters, such as the wall thickness, depend, among other things, on the conditions in the drill hole intended for use and on the properties and the quantity of fuel used. On the one hand, the container should be stable under the required conditions of use, on the other hand, the best possible heat transfer from the interior of the container to its outer wall is sought in order to use the energy generated by the combustion of the fuel as efficiently as possible.
  • the outer wall of the container is made of a steel, in particular of a high-strength, tough steel.
  • tubes which are usually used to convey oil or gas.
  • Such pipes are usually made of steel with an inner diameter of 8 to 40 cm and a length of 1 to 15 m.
  • Their wall thickness is usually 1 to 10 mm.
  • the diameter is advantageously chosen to be 10% to 30% smaller than the inside diameter of the borehole in the area in which the device is used.
  • the container preferably has a circular cross section. However, other cross-sectional shapes are also covered by the invention, in which case the outside diameter is understood to be the greatest distance between two points on the cross-sectional area.
  • the fuel can be present in different form in the combustion chamber, for example as a solid body, pasty mass or finely divided bulk material.
  • the solid body can be made for example by pressing with or without binder.
  • a metal-thermal mixture is used as the fuel.
  • metal-thermal mixtures here and below mixtures of metals with metal oxides are referred to, which react exothermically to form the metal originally contained in the metal oxide after activation of the redox reaction Depending on the fuel used, temperatures of far below the combustion chamber inside the combustion chamber above 1000 ° C.
  • a fuel is a subgroup of the metal-thermal mixtures in which aluminum is used as a reaction partner of the metal oxides.
  • mixtures are preferred which comprise aluminum as the reducing agent and CuO, FeO, Fe 2 O 3, Fe 3 O 4 , 2 O 2, O 3 and / or SiO 2 as the oxidizing agent.
  • Such alumi- thermal mixtures are inexpensive compared to other metallothermal mixtures and cover a wide range of applications with regard to the ignition temperature, the developing maximum temperature at the burning of the fuel and the burning rate.
  • the term "thermite” below refers to a mixture of iron (III) oxide and aluminum, which is produced, for example, by Elektro-Thermit GmbH & Co.
  • the patent RU 2291289 C2 discloses, in addition to the above-mentioned thermite mixtures, further metal-thermal mixtures such as nickel (II) oxide and magnesium, iron (III) oxide and silicon, chromium (III) oxide and magnesium, molybdenum ( VI) oxide and silicon and aluminum, vanadium (V) oxide and silicon. When these mixtures burn, temperatures of up to 2500 ° C may arise.
  • metal-thermal mixtures including iron oxide, aluminum powder, clay and a metal-phosphate binder is known from document RU 2062194 C1. These mixtures have a comparatively low specific heat generation and a maximum temperature during burning of about 1930 ° C.
  • At least one igniter for igniting the fuel is located in the combustion chamber.
  • the choice of igniter depends on the fuel used.
  • electric igniters such as electric arc igniters or spiral igniters, or chemical detonators can be used as long as they have sufficient activation energy.
  • Suitable chemical igniters are, for example, mixtures which are ignitable at temperatures which are below the ignition temperature of the fuel. Examples of suitable detonators are mixtures of (percentages by mass in parentheses):
  • Activation of the electrical detonators preferably occurs via a conductive cable which is routed along the logging cable or in the logging cable from the surface of the bore to the electrical detonator.
  • the longitudinal extent of the combustion chamber is selected such that it corresponds to the axial extent of the bore through the perforation region.
  • Combustion chamber and hollow chamber are arranged one behind the other in the longitudinal direction, where "longitudinal direction” is understood to mean the direction of the axis of the tubular container.
  • FIGS Alignment of the container in typical vertical boreholes
  • the hollow chamber and the combustion chamber may be directly adjacent to each other, with or without a separator between them.Other chambers may also be provided between the combustion chamber and the hollow chamber the tubular container has at least one inflow opening through which borehole fluid can flow from the outside into the container, the inflow opening being provided with a closure device which in turn comprises at least one closure element construction and material selection designed so that it loses its strength when exceeding a predetermined temperature, so that the shutter opens.
  • the closure device comprises, in addition to the closure element, a further component which closes the inflow opening, in particular a stopper which is located in the inflow opening.
  • the closure element connects the inflow opening with the further component. Once the closure member is exposed to a temperature exceeding a predetermined limit, the closure member loses its strength, and the further component is allowed to move out of the inflow opening under the pressure of the upcoming well fluid so that the liquid enters the interior of the container.
  • the closure element is preferably a weld seam or an adhesive bond.
  • the closure device consists only of the closure element, preferably in the form of a plug which closes the inflow opening, loses its strength when a predetermined temperature limit is exceeded, and consequently releases the inflow opening.
  • a closure element is advantageously made of a plastic or a metal, and the material selected so that its melting point corresponds to the predetermined temperature limit. Suitable materials include plastics having a melting temperature in the range of 150 ° C to 500 ° C or aluminum alloys with melting temperatures in the range of 600 ° C to 800 ° C.
  • each is provided with a closure device.
  • the closure devices can also be made continuous, for example in the form of a lining of the inner wall of the container, which extends over a plurality of inlet openings and is made of a material which loses its strength when the predetermined temperature limit value is exceeded.
  • the number of inflow openings is preferably from 1 to 10.
  • the total cross-sectional area of all inflow openings together is preferably at least as large as the cross-sectional area of the interior of the hollow chamber.
  • dividing elements are used to separate adjacent chambers from each other.
  • the separating elements preferably extend over the entire inner cross section of the container and extend substantially perpendicular to the longitudinal axis of the container.
  • Disk-shaped or cylindrical structures made of plastic or metal, whose outer diameter is slightly larger than the inner diameter of the container, are particularly preferably used as separating elements.
  • a combustion chamber can be produced, for example, by first filling fuel into the container and then forcing a separating element into the container so that the combustion chamber is closed.
  • the entire separating element is made of a material that loses its strength when a predetermined temperature is exceeded.
  • the temperature In the case of combustion of the fuel, the development of the temperature leads in this case to the fact that the separating element as a whole loses its strength.
  • only the means with which the separating element is secured in the rohrformigen container made of such a material. In this case, when the fuel burns, only the fastening of the separating element loses its strength, so that the separating element is free to move inside the container.
  • plastics having a melting temperature in the range of 150 ° C. to 500 ° C. or aluminum alloys having melting temperatures in the range of 600 ° C. to 800 ° C. are suitable for producing the separating elements or the means for their attachment for this embodiment.
  • the container is designed as a one-piece tube, in which the chambers are separated from one another by separating elements extending in the interior of the tube over the entire tube cross-section.
  • the container comprises two or more tubular containers, which form the chambers or parts of the chambers and whose end faces are connected via connecting elements.
  • the containers can be connected at their end faces in different ways via connecting elements.
  • An easy-to-implement way is that the containers are screwed by means of the connecting elements, for example by the containers are provided with an external thread on which a tubular connecting element is screwed with internal thread.
  • connection is provided in that the ends of the containers to be connected are each provided with a flange as connecting element, and the flanges are connected to each other, e.g. by screwing. With union nuts or a bayonet fitting, for example, connections between the rohrformigen containers can be easily produced.
  • a device according to the invention is first introduced into the borehole.
  • the device is preferably positioned in the borehole in such a way that the combustion chamber is located at the level of the perforation region of the conveying horizon.
  • the fuel is ignited in the combustion chamber.
  • the fuel burns in the combustion chamber, forming a reaction front, which runs through the combustion chamber in the course of burning.
  • the container is pulled upwards or downwards at a rate which corresponds to the speed of the reaction front in the segment of the container which is burning.
  • the wellbore fluid that surrounds the device in the region of the combustion chamber located in the combustion chamber strongly heated, preferably in temperature ranges of their boiling point.
  • the hot liquid and the resulting vapor clean the adjacent perforation area of the bore.
  • the closure element loses its strength due to the temperature increase in its surroundings.
  • the at least one inflow opening of the container is released, and borehole liquid flows into the interior of the container, in particular into the hollow chamber.
  • the device is removed from the borehole.
  • the arrangement and configuration of the inflow openings and, if appropriate, their closure elements ensure that the borehole liquid received in the interior of the container remains trapped in the container while it is being removed from the borehole.
  • the combustion chamber is located at the lower end of the tubular container.
  • the inflow opening with its closure device is arranged in the lower end side of the tubular container.
  • the hollow chamber is arranged above the combustion chamber, preferably it extends up to the upper end of the container.
  • the igniter is arranged in or on the fuel at the upper end of the combustion chamber.
  • the igniter is in the upper quarter of the fuel-filled volume of the combustion chamber.
  • the hollow chamber can connect directly to the combustion chamber.
  • the hollow chamber is preferably separated from the combustion chamber by a separating element that is made of a material that loses its strength when the fuel burns off.
  • the inflow opening is tapered from the inside to the outside, particularly preferably in the form of a cone.
  • the closure device comprises a plug adapted in shape to the inflow port and provided with a securing device which limits its axial movement away from the inflow port.
  • the plug is connected to the inside of the end face by a closing element, in particular a weld or gluing, thermally detachable.
  • the plug is made of a material that withstands the temperatures that prevail when burning the fuel. Only the closure element loses its strength during combustion of the fuel and releases the plug.
  • the securing device comprises a connecting element and a weight element, which is located outside of the container.
  • the connecting element is firmly connected to the weight element and the plug.
  • the connecting element may be rigid or flexible and is made of a material that withstands the temperatures prevailing during combustion of the fuel.
  • a rigid connecting element is preferably a rod, as a flexible connecting element, a chain or a rope used.
  • the connecting element is preferably made of a high-strength steel.
  • the radial extent of the weight element is greater at least in one spatial direction than the diameter of the inflow opening on the outside of the lower end face of the holds isses. This ensures that the weight element can not get inside the container.
  • the tubular container is first introduced into the borehole and preferably positioned such that the combustion chamber is located at the level of the perforation region of the conveying horizon. Subsequently, the fuel is ignited in the combustion chamber. Starting from the igniter, the fuel burns in the combustion chamber, forming a reaction front, which runs down in the course of burning through the combustion chamber. If a separator between see the combustion chamber and the hollow chamber is present, it loses its strength due to the temperature development during combustion of the fuel. As soon as the reaction front reaches the lower region of the combustion chamber in which the closure element is located, it loses its strength due to the temperature increase in its surroundings.
  • the plug separates from the inlet opening and releases it so that borehole fluid can flow into the hollow chamber.
  • the container is removed upwardly from the wellbore. Under the effect of gravity, the plug sinks back into the inlet opening due to its own weight and closes it. This effect is optionally enhanced by the weight of the weight member pulling down on the plug during removal of the container.
  • the wellbore fluid poured into the container is enclosed therein and can be carried to the surface. This embodiment of the invention is particularly suitable for cleaning the bottom hole.
  • the combustion chamber is located at the lower end of the tubular container. Above the combustion chamber, the hollow chamber is arranged. Again above the hollow chamber, an opening chamber is arranged, which is separated from the hollow chamber by a separating element. In the wall of the opening chamber is at least one inflow opening with its closure device. In the opening chamber, a further igniter and further fuel is present, which generates a temperature at its combustion, in which both the at least one closure element and the partition element to the hollow chamber lose their strength.
  • the combustion chamber is completely filled with fuel in this variant, and the igniter is mounted in or on the fuel at the upper end of the combustion chamber.
  • the hollow chamber can connect directly to the combustion chamber.
  • the hollow chamber is preferably separated from the combustion chamber by a separating element that is made of a material that loses its strength when the fuel burns off. In both cases after firing, in addition to the hollow chamber, the part of the combustion chamber not filled with burnt residues is also available for receiving wellbore fluid.
  • the opening chamber is attached to the upper end of the tubular container and the at least one inflow opening is provided at the upper end of the opening chamber. Most preferably, a plurality of inflow openings are provided.
  • the device according to the invention is first introduced into the borehole and preferably positioned such that the combustion chamber is located at the level of the perforation region of the conveying horizon. Subsequently, the fuel is ignited in the combustion chamber. Starting from the igniter, the fuel burns out in the combustion chamber, forming a reaction front that runs down through the combustion chamber in the course of the burn-off. If a separating element between the combustion chamber and the hollow chamber is present, it loses its strength due to the temperature development during combustion of the fuel. After completion of the burnup in the combustion chamber, the further fuel is ignited with the aid of the further igniter in the opening chamber. By burning a temperature is generated in which both the closure elements and the partition to the hollow chamber lose their strength.
  • the inlet openings are thereby released, and well fluid flows into the interior of the container.
  • the closing of the inlet openings after the inflow of the borehole liquid is not required, since the inflow openings are located at the upper end of the container.
  • the wellbore fluid is trapped inside the container and can be removed from the wellbore with the container up.
  • the igniters of the combustion chamber and the opening chamber are independently ignitable. This allows staggered phases of the well stimulation by combustion of the fuel in the combustion chamber on the one hand and the cleaning of the well by influx of contaminated well fluid on the other hand.
  • the two phases can be adapted flexibly to the respective local circumstances.
  • the heat given off to the wellbore fluid during the burnup phase typically causes the wellbore fluid to heat above its boiling point and begin to boil.
  • the thermal opening of the inlet openings is introduced only after the temperature of the outer wall of the device has cooled in the region of the at least one combustion chamber to the boiling temperature of the borehole liquid in this area.
  • the at least one inflow opening with its closure element is located in a central region of the container.
  • a stop element is arranged on the outside of the container.
  • a jacket tube is arranged around the container, which is attached to the outer wall of the container with a thermally releasable fastening element.
  • an upper combustion chamber containing a further igniter and other fuel, which generates a temperature at its combustion, in which the fastener loses its strength.
  • the device according to the invention is first introduced into the borehole and preferably positioned such that the combustion chamber is located at the level of the perforation region of the conveying horizon. Subsequently, the fuel is ignited in the combustion chamber. Starting from the igniter, the burner burns substance in the combustion chamber. After the combustion of the fuel in the combustion chamber, the closure element of the at least one inflow opening is thermally opened, so that borehole liquid flows into the interior of the container. Since the at least one inflow opening is located in the middle region of the container, it is advantageous to close off the inflow opening before removing the device from the borehole. This is done by igniting the further fuel in the upper combustion chamber.
  • the outer wall of the container in the region of the upper combustion chamber heats up to such an extent that the fastening element on the outer wall loses its strength.
  • the jacket tube becomes free and, due to gravity, slides along the outer wall of the container down to the stop element.
  • the length of the jacket tube is dimensioned so that all inflow openings are closed when the jacket tube is seated on the stop element. Since the upper combustion chamber is equipped with its own fuel and detonator, the closing of the inflow openings can take place independently of the firing process and the inflow of the borehole liquid. After closing the single-flow orifices, the wellbore fluid is trapped inside the container and can be removed with the container upwardly out of the wellbore.
  • the fastening element which secures the jacket tube to the outer wall of the container, can be applied externally to the outer wall, for example as a glued or welded connection.
  • the fastening element is at least one plug or screw connection between the jacket tube and the wall of the container, which is made of a material which loses its strength when a predetermined temperature limit is exceeded, for example a plastic.
  • a support ring is fixed in or on the outer wall of the container, which holds the jacket tube. In this case, the support ring is made of a material that loses its strength when a predetermined temperature limit is exceeded, such as a plastic.
  • the stop element is firmly connected to the outer wall of the container, for example screwed, riveted or welded. It is designed so that it can absorb the forces acting on it upon impact of the sliding down jacket tube, without causing damage to the stop element.
  • the stop element is made of a steel.
  • the stop element is a component which extends radially outwards in the form of a collar from the outer surface of the container. The collar may consist of individual components or be designed as a rotating component.
  • the combustion chamber and the hollow chamber are arranged between the lower end side of the container and the upper combustion chamber from bottom to top, wherein the combustion chamber is separated from the hollow chamber by a separating element. Furthermore, the at least one inflow opening are arranged at the upper end of the combustion chamber and the igniter at the lower end of the combustion chamber.
  • the fuel is selected so that it burns after ignition from bottom to top and burned of the fuel at the upper end of the combustion chamber generates a temperature at which both the at least one closure element and the partition element to the hollow chamber lose their strength.
  • the inflow openings are opened due to the burning off of the fuel in the combustion chamber as soon as the reaction front reaches the region of the inflow openings.
  • the combustion chamber, a separation chamber, an opening chamber and the hollow chamber are arranged between the lower end side of the container and the upper combustion chamber from bottom to top.
  • the hollow chamber is bounded above and below by separating elements.
  • the opening chamber is arranged at the level of the at least one inflow opening and has a further igniter and further fuel, which generates a temperature at its combustion, in which both the at least one closure element and the partition element to the hollow chamber lose their strength.
  • the combustion of the fuel in the combustion chamber and the opening of the inlet openings can be controlled independently of each other in time. This is made possible by the separation chamber, which contains no fuel and thereby ensures a thermal decoupling between the burning fuel and the other fuel in the opening chamber.
  • the separation chamber may be separated from the combustion chamber and the opening chamber by dividing elements.
  • the separation chamber may also be a region of the combustion chamber that is not filled with fuel.
  • the hollow chamber, the combustion chamber and a separation chamber are arranged between the lower end side of the container and the upper combustion chamber from bottom to top.
  • the hollow chamber is separated from the combustion chamber by a separating element.
  • the at least one inflow opening is arranged at the lower end of the combustion chamber.
  • the fuel in the combustion chamber is selected such that it generates a temperature during combustion in the lower end of the combustion chamber, in which both the at least one closure element and the partition element to the hollow chamber lose their strength.
  • the separation chamber can be as a separate, separated with separating elements chamber or be realized as part of the combustion chamber, which is not filled with fuel.
  • the separation chamber fulfills the function of thermal decoupling of the combustion chamber and the upper combustion chamber.
  • the thermal opening of the inlet openings is caused by an explosive charge.
  • the explosive charge may be embedded in the fuel and ignite due to the evolution of heat.
  • the explosive charge is used in place of the fuel and is ignited by a separate detonator.
  • This design variant is particularly advantageous in embodiments with a separate opening chamber.
  • the at least one inflow opening and its closure device are designed such that the closure element is pressed out of the inflow opening by the increase in pressure and temperature after demolition.
  • the inflow opening is designed widening from the inside to the outside, particularly preferably in FIG Shape of a cone. If necessary, existing separating elements are to be designed so that they lose their strength due to the pressure and temperature increase after demolition
  • the device according to the invention can be manufactured beforehand in individual parts and transported to the borehole, for example individual pipe sections which are filled with fuel or form the hollow chamber. On site, the items can be easily assembled and adapted to the specific requirements, for example, by depending on requirements, a corresponding number of pipe sections are bolted together. Lengths of individual pipe sections of one to three meters are preferred from a manufacturing point of view and with a view to easy transport to the borehole. The total length of the device depends on the particular requirements and can be, for example, from two to about fifty meters.
  • the device can be introduced into the borehole by known means such as winch and logging cable and removed again therefrom. In addition to the aforementioned preferred embodiments, other embodiments are also covered by the invention, for example combinations or modifications of the illustrated embodiments.
  • the device according to the invention is characterized by a simple construction which is cost-effective to produce and easy to use. A large part of the components can be reused several times.
  • the device can be made to stock, possibly in individual parts, and stored without problems for a long time. In particular, when using an alumino-thermal mixture as fuel, no potentially harmful gases are emitted when burning off the fuel.
  • the borehole liquid which surrounds the device in the region of the combustion chamber in the combustion is strongly heated.
  • the well fluid begins to boil and evaporates at least partially.
  • the hot liquid and the resulting vapor penetrate into the perforation channels and create turbulence and pressure pulses in the rock.
  • encrustations and / or high-viscosity deposits are released from the rock and the perforation channels thus cleaned.
  • This effect is intensified as soon as the inlet openings are opened and the pressure in the vicinity of the inlet openings drops drastically.
  • the detached contaminants are discharged from the perforation openings in the borehole liquid, taken into the interior of the device according to the invention and transported from the bore to the surface.
  • the method according to the invention effects a targeted and efficient stimulation and cleaning of the perforation region of the delivery horizon.
  • the fluids to be delivered such as crude oil or natural gas
  • the fluids to be delivered can again flow and be conveyed more easily through the perforation channels into the borehole.
  • Fig. 1 embodiment of a device according to the invention with an inflow opening in the lower end face of the container
  • Fig. 2 embodiment of a device according to the invention with an inflow opening at the upper end of the container
  • Fig. 3 embodiment of a device according to the invention with an inflow opening in the central region of the container
  • Fig. 4 variant of the embodiment with an inflow opening in the central region of the container
  • Fig. 5 variant of the embodiment with an inflow opening in the central region of the container
  • closure device
  • Figures 1 to 5 are schematic sectional views of a well in an underground deposit.
  • the well 10 is provided with a liner 11, for example a steel pipe.
  • the liner 1 1 prevents loose rock adjacent to the wellbore from falling into the wellbore and usually breaking pressurized formation fluids such as formation water in large quantities into the wellbore.
  • the lining 1 1 has a plurality of perforation openings 12.
  • By known methods such as ball perforation or jet perforation perforation channels 13 were generated in the conveying horizon 14.
  • the inner wall of the liner 1 1 is cylindrical or stepwise cylindrical designed with a circular cross-section. In a stepwise cylindrical configuration, the diameter of the circular cross section gradually decreases in the axial direction downwards.
  • the tubular container 21 is connected via a suspension with the logging cable 20, which can be moved by a winch on the surface. The latter is not shown in the figures, corresponding devices are known in the art. With the help of the winch, the container 21 can be moved in the borehole 10 in the axial direction.
  • the outer diameter of the container 21 is preferably 10% to 30% smaller than the inner diameter of the lining 11 in the region of the conveying horizon 14.
  • FIG. 1 a to 1 d show a first preferred embodiment of a device according to the invention for cleaning a liquid-filled borehole.
  • a tubular container 21 is attached via a suspension.
  • the container 21 is designed as a multi-part tube, of which two tube segments 22 are shown in the figure.
  • the tube segments 22 are connected to each other via segment connectors 23, for example by flange connections or threaded connections.
  • the tube segments 22 may be made of steel tubes commonly used in oil production and referred to as "tubing", for example of the type H-40, C-75, N-80 or P-105.
  • a combustion chamber 30 which is filled with a fuel 31 and closed at the top by a separating element 24.
  • the fuel is preferably a aluminothermic mixture comprising the components Al, FeO, Fe203, FE30 4 and / or S1O2 and is present as a bed or pressed blocks in the combustion chamber. Particular preference is given to a thermal bed or pressed thermite blocks.
  • the amount of fuel 31 can range from a few kilograms to several hundred kilograms and is then determined by how large the amount of heat to be introduced into the well fluid.
  • the separating element 24 extends over the entire pipe cross-section and is made of a material which loses its strength during combustion of the fuel.
  • Suitable materials include plastics, aluminum or a low melting point iron alloy.
  • the separating element closes off the combustion chamber 30 and thus protects the fuel from moisture, for example.
  • the space above the separating element 24 to the upper end of the container is not filled with fuel and forms a hollow chamber 25.
  • an igniter 32 is arranged in the fuel, which is suitable to ignite the fuel 31, for example an electric Igniter, such as an arc igniter or spiral igniter, or a chemical detonator.
  • the activation or ignition temperature is dependent on the composition of the fuel and may be in an aluminothermic mixture, for example, from 600 ° C to 1300 ° C.
  • the igniter can be ignited via a line which is guided by the igniter on the logging cable 20 to the surface.
  • an inflow opening 41 is arranged with its closure device 42.
  • Fig. 1b shows a more detailed view of the lower end of the container.
  • the inflow opening 41 is designed as tapering from the inside to the outside.
  • the closure device 42 comprises a plug 44 adapted in shape to the inflow opening and provided with a securing device 45 which limits its axial movement away from the inflow opening.
  • the securing device 45 comprises a weight element 46, which is located outside of the tubular container 21 and is connected via a steel cable as a flexible connecting element 47 fixed to the plug.
  • the weight element consists of a truncated cone-shaped basic body, on which three rods are mounted, projecting radially outwards and distributed uniformly over the circumference.
  • the length of the rods is dimensioned such that the diameter of the circumference around the rod ends is greater than the outer diameter of the inflow opening 41.
  • the weight element 46 can also be designed differently, for example with a spherical or disc-shaped basic body with or without lateral projections.
  • the main body may also consist of rods, which are preferably crossed together firmly connected.
  • the weight element is made of a metal, in particular iron or steel, and has a mass of 20 to 40 kg.
  • the flexible connecting element 47, in particular steel cable, preferably has a length of 0.5 m to 2 m.
  • the plug 44 is connected to the inside of the front side by a closure element 43 thermally releasable.
  • the closure element 43 is preferably designed as a weld or gluing. With regard to the strength, the closure element 43 is designed in such a way in that the connection between the inside of the end face and the plug 44 at least withstands the hydrostatic pressure of the wellbore fluid surrounding the container, as long as the fuel in the combustion chamber is not ignited. In this case, the weight force that exerts the fuel mass on the plug 44, be taken into account.
  • the plug 44 itself is made of a material that withstands the temperatures that prevail in the combustion of the fuel.
  • the tubular container 21 is first introduced into the borehole.
  • the container When the cleaning of the bottom of the hole 15 is in the foreground, the container is positioned so that its lower end is 0.5 m to 5 m above the bottom of the hole.
  • the connecting element 47 is in this case preferably dimensioned so that the weight element 46 rests on the bottom of the hole after the positioning of the container. If, on the other hand, the cleaning of the perforation region of the conveying horizon 14 is in the foreground, the container 21 is positioned in such a way that the combustion chamber 30 is located at the level of the perforation region of the conveying horizon 14. In the illustrated example, both requirements are present in combination, the bottom hole 15 is located just below the conveying horizon 14.
  • the weight element 46 of the securing device 45 rests on the bottom hole 15.
  • the fuel 31 is ignited in the combustion chamber 30.
  • the fuel burns in the combustion chamber, wherein a reaction front 33 forms, which runs in the course of the burn down through the combustion chamber.
  • a reaction front 33 forms, which runs in the course of the burn down through the combustion chamber.
  • temperatures are reached, which cause the separating element 24 loses its strength, in particular thermally destroyed.
  • the wellbore fluid that surrounds the device in the region of the burning combustion chamber 30 is strongly heated, so that it at least partially begins to boil. The hot liquid and the resulting vapor penetrate through the perforations 12 in the perforation channels 13 and generate pressure pulses in the rock.
  • the fluids to be delivered such as oil or natural gas, can again flow more easily through the perforation channels into the borehole.
  • the stimulated turbulence transports the detached contaminants from the perforation channels into the wellbore and is located in the wellbore fluid.
  • Borehole fluid transports particulate matter removed from the perforation channels as well as sand and mud from the bottom of the well into the interior of the container.
  • the inflow process may take from one to about ten minutes.
  • the total length of the container 21 is selected so that the uppermost segment projects beyond the liquid level of the borehole liquid.
  • an opening is provided, via which the interior of the container communicates with the ambient air, so that inside the container atmospheric pressure prevails. During the inflow, the air inside the container can escape, which shortens the Einströmzeit.
  • the container 21 according to the invention is designed as a riser string. This variant is advantageously used when the liquid column in the borehole is more than 100 meters high.
  • a package is used around the container 21, which extends in the radial direction from the container outer wall to the inner wall of the borehole. This limits the area of the wellbore fluid stimulated by the combustion of the fuel in the combustion chamber, resulting in more intense stimulation of the perforation channels.
  • the mass of the weight element 46 is dimensioned such that the weight force is greater than the flow forces, so that the weight element remains lying on the bottom hole during the inflow process.
  • the total mass of plug 44, connecting element 47 and weight element 46 is selected so that after the thermal release of the closure element 43, the plug and the weight element attached to it via the connecting element by the pressure of the adjacent well fluid in the direction of the interior of the container 21 are pulled. Since the radial extent of the weight element 46 in at least one spatial direction is greater than the diameter of the inflow opening 41 on the outside of the lower end side of the container, the weight element can not reach the interior of the container. This limits the axial movement of the plug away from the inlet opening. In this case, the weight element 46 is designed such that it does not completely block the inflow opening 41, but the well fluid can flow around the weight element abutting the inflow opening into the container.
  • the container 21 After completion of the inflow, the container 21 is removed upwardly from the wellbore. Under the effect of gravity, the plug 44 sinks back into the inflow opening 41 due to its own weight and closes it. This effect is enhanced by the weight of the weight member 46 which pulls down during removal of the container 21 on the plug. This situation is shown schematically in Fig. 1 d.
  • the borehole liquid which has flowed into the container 21 and contains the dirt particles contained therein. none and / or the sand and mud is trapped in it and can be carried to the surface. This process can be repeated several times as needed. In this way, the perforation channels 13 and the bottom hole 15 are effectively cleaned.
  • FIGS. 2a and 2b show a second preferred embodiment of a device according to the invention for cleaning a fluid-filled borehole.
  • a tubular container 21 is attached via a suspension, which is designed as a multi-part tube, of which two tube segments 22 are shown in the figure.
  • the pipe segments 22 are connected to one another via segment connectors, for example by flange connections or threaded connections.
  • Both end faces of the container 21 are closed and made of a material that withstands the temperatures generated during the combustion of the fuel. From the inner surface of the lower end face upwards extends a combustion chamber 30, which is filled with a fuel 31 and closed at the top by a separating element 24.
  • the same fuels are preferably used as described above with respect to FIG.
  • the separating element 24 extends over the entire pipe cross-section and is made of a material which loses its strength during combustion of the fuel.
  • the separating element closes off the combustion chamber 30 and thus protects the fuel from moisture, for example.
  • an igniter 32 is arranged in the fuel, which is suitable for igniting the fuel, for example an electric igniter such as an arc igniter or spiral igniter, or a chemical igniter.
  • the igniter can be ignited via a line which is guided by the igniter on the logging cable 20 to the surface.
  • the length of the combustion chamber preferably corresponds to the axial extent of the perforation region of the delivery horizon 14 and may be several meters.
  • the space above the separating element 24 is not filled with fuel and forms a hollow chamber 25.
  • Their length can be significantly longer than the length of the combustion chamber and be, for example, from a few meters to about 50 meters.
  • the hollow chamber 25 is closed at the top by a further separating element 24.
  • the space above the further separating element to the upper end side of the container 21 is provided with further fuel 48, in particular a Thermitmischung, and another igniter 49 and forms the opening chamber 40.
  • Their length can be up to about one meter.
  • a plurality of inflow openings 41 with their closure devices 42 are arranged in the region of the opening chamber 40. In the illustrated example, the inflow openings 41 are arranged distributed in two rows one above the other evenly over the circumference of the container.
  • Each inflow opening 41 is designed as a cone tapering from inside to outside.
  • the closure devices 42 each comprise only one closure element which, as a plug, is adapted in its shape to the inflow opening and is made of a material which loses its strength when the further fuel 48 burns off.
  • the closure devices can also analogously to the embodiment of FIG. 1 as Plug with additional closure element, which is thermally detachably connected to the inside of the wall of the opening chamber and the plug, be designed.
  • the tubular container 21 is first introduced into the borehole and positioned such that the combustion chamber 30 is located at the level of the perforation region of the conveying horizon 14. Subsequently, the fuel 31 is ignited in the combustion chamber 30. Starting from the igniter 32, the fuel burns in the combustion chamber, wherein a reaction front is formed, which runs in the course of burning down through the combustion chamber. During the combustion of the fuel in the upper region of the combustion chamber 30 temperatures are reached, which cause the separating element 24 between the combustion chamber and the hollow chamber 25 is thermally destroyed. Depending on the application, the amount of fuel can be from 10 kg to 300 kg.
  • the further fuel 48 is ignited by means of the further igniter 49 in the opening chamber 40.
  • this ignition is waited until the outside temperature of the container falls below the boiling point of the borehole liquid again.
  • By burning a temperature is generated at which both the closure elements and the partition member 24 to the hollow chamber 25 lose their strength.
  • the inflow openings 41 are thereby released, and well fluid with the contaminant and / or sand particles contained therein flows into the interior of the container 21.
  • the volume of the combustion chamber 30, which is not filled with residues 34 of the burnup is also available for receiving borehole liquid.
  • Fig. 2b shows the device according to the invention after completion of the inflow.
  • the closing of the inflow openings 41 is not required after the inflow of the borehole liquid, since the inflow openings are located at the upper end of the container 21.
  • the wellbore fluid is trapped inside the container and can be removed from the wellbore with the container up.
  • FIGS. 3a to 3c A third preferred embodiment of a device according to the invention for cleaning a liquid-filled borehole is shown in FIGS. 3a to 3c.
  • a tubular container 21 On a logging cable 20, a tubular container 21 is attached via a suspension, which is designed as a multi-part tube, of which two tube segments 22 are shown in the figure.
  • the tube segments 22 are connected to each other via segment connectors, for example by flange connections or threaded connections.
  • Both end faces of the container 21 are closed and made of a material that withstands the temperatures generated during the combustion of the fuel.
  • a combustion chamber 30 which is filled with a fuel 31 and is closed at the top by a separating element 24.
  • the separating element 24 extends over the entire pipe cross-section and is made of a material which loses its strength during combustion of the fuel.
  • the separating element 24 closes off the combustion chamber 30 and thus protects the fuel from moisture, for example.
  • Below the separating element are located at the upper end of the combustion chamber 30 a plurality of inflow openings 41 with their closure devices 42. With respect to the axial extent of the container 21, the inflow openings 41 are in the central region of the container 21.
  • the inflow openings 41 in two rows one above the other evenly distributed over the circumference of the container 21.
  • Each inflow opening 41 is designed as a cone tapering from inside to outside.
  • the closure devices 42 comprise in this example in each case only one closure element, which is adapted as a stopper in its shape to the inflow opening and made of a material which loses its strength during combustion of the fuel 31 in this area.
  • the closure devices 42 may also be analogous to the embodiment of FIG. 1 as a plug with additional closure element, which is thermally releasably connected to the inside of the wall of the container and the plug, designed.
  • an igniter 32 is arranged in the fuel, which is suitable for igniting the fuel, for example an electric igniter such as an arc igniter or spiral igniter, or a chemical detonator.
  • the igniter can be ignited via a line which is guided by the igniter on the logging cable 20 to the surface.
  • the length of the combustion chamber preferably corresponds to the axial extent of the perforation region of the delivery horizon 14 and may be several meters.
  • the fuel 31 is selected so that it burns after ignition from bottom to top and generates a temperature at the top of the combustion chamber during combustion, at which both the closure elements of the closure devices 42 and the separator 24 lose their strength.
  • the space above the separating element 24 is not filled with fuel and forms a hollow chamber 25.
  • the hollow chamber is closed at the top by a further separating element 24.
  • the space above the further separating element to the upper end side of the container 21 is connected to further fuel 51, in particular a Thermitmischung, and a further ignition 52 and forms the upper combustion chamber 50.
  • the axial extent of the upper combustion chamber is preferably from 0.5 m to 1 m.
  • a jacket tube 53 is arranged around the container, which is fastened with a thermally releasable fastening element 54 on the outer wall of the container.
  • the upper combustion chamber 50 is located inside the container, at the level of the fastening element 54.
  • the fuel 51 in the upper combustion chamber 50 generates a temperature at which it burns, at which point the fastening element loses its strength.
  • the fastener 54 is a series of spot welded joints that hold the jacket tube 53 in its axial position at the top of the container 21. The weld points are designed such that they melt at the temperatures prevailing during combustion of the fuel 51 in the upper combustion chamber 50.
  • a stop element 55 is arranged on the outside of the container 21 and fixedly connected thereto.
  • the stop element 55 is executed in this example as a circumferential collar made of steel, which is welded to the outer wall of the container.
  • the amount of fuel can be from 10 kg to 300 kg.
  • the wellbore fluid surrounding the device in the region of the burnt combustion chamber 30 is strongly heated, so that it at least partially begins to boil. The hot liquid and the resulting vapor penetrate through the perforation openings 12 into the perforation channels 13 and clean them.
  • Fig. 3b shows the device according to the invention after completion of the inflow. Since inflow openings 41 are located in the middle region of the container 21, it is advantageous to close the inflow openings prior to removal of the device from the borehole. This is done by igniting the further fuel 51 in the upper combustion chamber 50.
  • the outer wall of the container in the region of the upper combustion chamber heats up to such an extent that the fastening element 54 on the outer wall loses its strength.
  • the jacket tube 53 becomes free and, due to gravity, slides along the outer wall of the container down to the stop element 55. This state is shown in FIG. 3c.
  • the length of the jacket tube 53 is dimensioned such that all inflow openings 41 are closed when the jacket tube is seated on the stop element.
  • the length of the jacket tube is 1.5 times to twice the axial extent of the inlet openings on the outside of the container, for example two meters with an extension of the inlet openings of one meter.
  • the closing of the inflow openings can be timed independently of the burning off operation and the inflow of the borehole liquid.
  • the wellbore liquid is trapped inside the container and can be removed with the container upwardly out of the wellbore.
  • FIG 4 shows a variant of the third preferred embodiment in which the combustion chamber 30, a separation chamber 26, an opening chamber 40 and the hollow chamber 25 are arranged between the lower end face of the container 21 and the upper combustion chamber 50 from the bottom to the top.
  • the hollow chamber 25 is bounded above and below by separating elements 24.
  • the opening chamber 40 is arranged at the level of the inlet openings 41 and has a further igniter 49 and further fuel 48.
  • the separation chamber 26 is separated from the combustion chamber 30 and the opening chamber 40 by separators in this example. It can also be realized in other ways, for example by an upper section of the combustion chamber is not filled with fuel.
  • a stop element 55 is attached to the outside of the container 21.
  • a jacket tube 53 is arranged, which is fastened with a thermally releasable fastening element 54 on the outer wall of the container.
  • the process is carried out similarly as described with reference to FIGS. 3a to 3c.
  • the difference lies in the fact that in the embodiment according to FIG. 4, the phases of fuel burn-up in the combustion chamber 30 and the phase of the flow of borehole liquid into the container 21 can be controlled independently of one another.
  • the combustion of the fuel 31 in the combustion chamber is started. This is the Separating element to the separation chamber 26 thermally destroyed.
  • the separation chamber is dimensioned such that the heat generated during combustion of the fuel 31 is not sufficient to destroy the separator to the opening chamber 40 or to ignite the other fuel 48 in the opening chamber.
  • the further fuel 48 is ignited in the opening chamber 40 by means of the further igniter 49.
  • this ignition is waited until the outside temperature of the container falls below the boiling point of the borehole liquid again.
  • a temperature is generated in which both the closure elements of the closure devices 42 and the separating elements to the hollow chamber 25 and to the separation chamber 26 lose their strength.
  • the inflow openings 41 are thereby released, and borehole liquid with the contaminating and / or sand particles contained therein flows into the interior of the container 21.
  • the volume of the combustion chamber 30 which is not filled with residues 34 of the exhaust is also present.
  • FIG. 5 a further variant of the third preferred embodiment is shown in which between the lower end face of the container 21 and the upper combustion chamber 50 from bottom to top, the hollow chamber 25, the combustion chamber 30 and a separation chamber 26 are arranged.
  • the hollow chamber 25 is separated from the combustion chamber 30 by a separating element 24.
  • At the lower end of the combustion chamber inlet openings 41 are arranged with their closure devices 42.
  • a stop element 55 is attached to the outside of the container 21.
  • a jacket tube 53 is arranged, which is fastened with a thermally releasable fastening element 54 on the outer wall of the container.

Landscapes

  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Air Bags (AREA)
  • Feeding And Controlling Fuel (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

L'invention concerne un dispositif de nettoyage d'un trou de forage (10) rempli de liquide. Le dispositif comprend un contenant tubulaire (21) à l'intérieur duquel se trouve au moins une chambre de combustion (30) et au moins une cavité (25) qui sont disposées l'une à la suite de l'autre dans la direction longitudinale. La chambre de combustion (30) est remplie au moins partiellement d'un combustible (31) et comporte un allumeur (32). Le contenant (21) présente au moins un orifice d'entrée par lequel le liquide du trou de forage peut s'écouler depuis l'extérieur à l'intérieur du contenant (21). L'au moins un orifice d'entrée est muni d'un dispositif de fermeture (42) qui comporte au moins un élément de fermeture qui perd de sa résistance mécanique lorsqu'une température prédéterminée est dépassée de sorte que le dispositif de fermeture (42) s'ouvre. L'invention concerne en outre un procédé de stimulation et de nettoyage d'un trou de forage rempli de liquide par utilisation d'un dispositif selon l'invention.
PCT/EP2013/075369 2012-12-13 2013-12-03 Dispositif et procédé de stimulation et de nettoyage d'un trou de forage rempli de liquide WO2014090633A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP13799295.4A EP2932025A1 (fr) 2012-12-13 2013-12-03 Dispositif et procédé de stimulation et de nettoyage d'un trou de forage rempli de liquide
RU2015127890A RU2015127890A (ru) 2012-12-13 2013-12-03 Устройство и способ для стимуляции и очистки буровой скважины, заполненной жидкостью
US14/442,841 US20150292287A1 (en) 2012-12-13 2013-12-03 Device and process for stimulation and cleaning of a liquid-filled well
CA2893313A CA2893313A1 (fr) 2012-12-13 2013-12-03 Dispositif et procede de stimulation et de nettoyage d'un puits rempli de liquide

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP12197048.7 2012-12-13
EP12197048 2012-12-13

Publications (2)

Publication Number Publication Date
WO2014090633A1 true WO2014090633A1 (fr) 2014-06-19
WO2014090633A9 WO2014090633A9 (fr) 2014-08-14

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PCT/EP2013/075369 WO2014090633A1 (fr) 2012-12-13 2013-12-03 Dispositif et procédé de stimulation et de nettoyage d'un trou de forage rempli de liquide

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Country Link
US (1) US20150292287A1 (fr)
EP (1) EP2932025A1 (fr)
CA (1) CA2893313A1 (fr)
RU (1) RU2015127890A (fr)
WO (1) WO2014090633A1 (fr)

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US2254443A (en) * 1938-06-14 1941-09-02 Mabel E Richart Method of treating wells
RU2062194C1 (ru) 1994-06-15 1996-06-20 Сальников Вадим Михайлович Состав безгазового термитного топлива
RU2178065C1 (ru) 2000-10-23 2002-01-10 Падерин Михаил Григорьевич Способ перфорации и обработки призабойной зоны скважины и устройство для его осуществления
RU2211313C1 (ru) 2001-12-29 2003-08-27 Общество с ограниченной ответственностью "ЮганскНИПИнефть" Устройство для депрессионной перфорации скважин
RU2291289C2 (ru) 2005-02-18 2007-01-10 Василий Петрович Кобяков Термоимпульсный способ обработки призабойной зоны нефтяных скважин
RU2311529C2 (ru) 2006-01-10 2007-11-27 Федеральное казенное предприятие "Пермский пороховой завод" (ФКП "Пермский пороховой завод") Газогенератор на твердом топливе для обработки нефтегазовых скважин
EP2194227A2 (fr) * 2008-12-03 2010-06-09 Halliburton Energy Services, Inc. Système et procédé pour vérifier l'état d'un canon perforateur avant de perforer un trou de forage
EP2460975A2 (fr) * 2010-12-02 2012-06-06 Wintershall Holding GmbH Dispositif et procédé pour la stimulation du puits.
WO2012150906A1 (fr) * 2011-05-03 2012-11-08 Rusinko Pte Ltd Générateur thermique à impulsions

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US2740478A (en) * 1953-02-24 1956-04-03 Haskell M Greene Pressurizing of wells by gaseous release
US2781099A (en) * 1954-04-08 1957-02-12 Aerojet General Co Oil well tool
US3254715A (en) * 1962-07-12 1966-06-07 Gulf Research Development Co Process for consolidating incompetent subsurface formations
US3721191A (en) * 1970-10-21 1973-03-20 J Hastings Well screen cleaning device
US3712378A (en) * 1971-10-01 1973-01-23 Shell Oil Co Wire line method and apparatus for cleaning well perforations
US6543539B1 (en) * 2000-11-20 2003-04-08 Board Of Regents, The University Of Texas System Perforated casing method and system

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2254443A (en) * 1938-06-14 1941-09-02 Mabel E Richart Method of treating wells
RU2062194C1 (ru) 1994-06-15 1996-06-20 Сальников Вадим Михайлович Состав безгазового термитного топлива
RU2178065C1 (ru) 2000-10-23 2002-01-10 Падерин Михаил Григорьевич Способ перфорации и обработки призабойной зоны скважины и устройство для его осуществления
RU2211313C1 (ru) 2001-12-29 2003-08-27 Общество с ограниченной ответственностью "ЮганскНИПИнефть" Устройство для депрессионной перфорации скважин
RU2291289C2 (ru) 2005-02-18 2007-01-10 Василий Петрович Кобяков Термоимпульсный способ обработки призабойной зоны нефтяных скважин
RU2311529C2 (ru) 2006-01-10 2007-11-27 Федеральное казенное предприятие "Пермский пороховой завод" (ФКП "Пермский пороховой завод") Газогенератор на твердом топливе для обработки нефтегазовых скважин
EP2194227A2 (fr) * 2008-12-03 2010-06-09 Halliburton Energy Services, Inc. Système et procédé pour vérifier l'état d'un canon perforateur avant de perforer un trou de forage
EP2460975A2 (fr) * 2010-12-02 2012-06-06 Wintershall Holding GmbH Dispositif et procédé pour la stimulation du puits.
WO2012150906A1 (fr) * 2011-05-03 2012-11-08 Rusinko Pte Ltd Générateur thermique à impulsions

Also Published As

Publication number Publication date
WO2014090633A9 (fr) 2014-08-14
EP2932025A1 (fr) 2015-10-21
CA2893313A1 (fr) 2014-06-19
US20150292287A1 (en) 2015-10-15
RU2015127890A (ru) 2017-01-16

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