EP1583887B1 - Method and device for intensifying the permeability of ground layers close to bore holes and filter bodies and filter layers in wells and other production wells - Google Patents
Method and device for intensifying the permeability of ground layers close to bore holes and filter bodies and filter layers in wells and other production wells Download PDFInfo
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- EP1583887B1 EP1583887B1 EP04700687A EP04700687A EP1583887B1 EP 1583887 B1 EP1583887 B1 EP 1583887B1 EP 04700687 A EP04700687 A EP 04700687A EP 04700687 A EP04700687 A EP 04700687A EP 1583887 B1 EP1583887 B1 EP 1583887B1
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- pulse generator
- pressure
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- pulse
- filter
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- 238000000034 method Methods 0.000 title claims abstract description 41
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 32
- 230000035699 permeability Effects 0.000 title claims abstract description 9
- 239000007788 liquid Substances 0.000 claims abstract description 36
- 230000000694 effects Effects 0.000 claims abstract description 6
- 238000000605 extraction Methods 0.000 claims abstract 10
- 238000011156 evaluation Methods 0.000 claims abstract 3
- 238000005259 measurement Methods 0.000 claims abstract 2
- 230000008929 regeneration Effects 0.000 claims description 17
- 238000011069 regeneration method Methods 0.000 claims description 17
- 230000001172 regenerating effect Effects 0.000 claims description 5
- 230000009471 action Effects 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000011065 in-situ storage Methods 0.000 claims 1
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- 238000006073 displacement reaction Methods 0.000 description 6
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- 235000020681 well water Nutrition 0.000 description 4
- 239000002349 well water Substances 0.000 description 4
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- 230000008859 change Effects 0.000 description 2
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- 229910052742 iron Inorganic materials 0.000 description 2
- 229910052572 stoneware Inorganic materials 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
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- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
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- 230000018109 developmental process Effects 0.000 description 1
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Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B28/00—Vibration generating arrangements for boreholes or wells, e.g. for stimulating production
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B37/08—Methods or apparatus for cleaning boreholes or wells cleaning in situ of down-hole filters, screens, e.g. casing perforations, or gravel packs
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B43/003—Vibrating earth formations
Definitions
- the invention relates to a method and a device with the aid of which the permeability of near-bottom soil layers as well as introduced into the bore filter bodies and filter layers in wells and other production wells can be intensified.
- German Patent DE 195 37 689 C2 describes a method for the regeneration of a well, in which a cylindrical body is lowered down between two wire disks as centering in the well, and by opening a valve in this body under high pressure gas is accelerated against the well wall. This amount of gas acts pulsating as a pressure wave against the well wall, the opening times of the valve, the exiting gas quantity and the gas pressure can be set firmly before the regeneration in the well.
- a disadvantage of this method is that while working in the well no simultaneous and immediate adjustment of the gas pressure, the amount of gas and the opening times of the valve can be done to the changing by machining after each pulse hydraulic properties of the well and its environment in the ground, and that the opening of the valve does not occur by a signal at a precisely defined time. Also, the specified pressure of 10 to 25 bar does not guarantee a high penetration depth into the bottom layers to be regenerated or into the filter bodies and filter layers.
- a further method which acts on at least one vertical bore portion in the well, which is delimited by two packers with respect to the remaining bore, with a gaseous or liquid pressure means pulse.
- the existing well water and / or the pressure medium is pressed through the filter walls into the surrounding filter gravel layers.
- a pressure vessel is used as a buffer for the pressure medium to avoid pressure losses in pressure lines.
- the operating principle for achieving a regeneration effect consists in this method in the pulse wise acting on the bore section with a gaseous or liquid pressure medium and thereby caused pressing the well water and / or the pressure medium through the filter slots in the filter gravel layers, that is, there is only a volume displacement through the Filter slots through.
- the patent application DE 198 43 292.5 further proposes a method in which pulses are released by means of the sudden release of a compressed gas or a liquid under pressure in the well. Due to the moving material used in the back pressure chamber is the opening and closing operation the device used to perform the method too slow to generate a kinetic energy pulse. Again, only a pressure-changing volume displacement is again effective as a regenerating effect.
- volume displacement limits the range of known methods in the bore environment, since the compressibility of liquids is known to be low. Only when explosives are used, the very high rate of chemical reaction of the explosive additionally generates an energy pulse in the liquid, which results in a long range of this process, but at the same time leads to a "hard” pulse due to the very rapid time course the drilling and the finishing materials involves a great risk.
- the invention is therefore an object of the invention to provide a method and apparatus for intensifying the permeability of near-bottom soil layers as well as Filterkörpem and filter layers in wells and other production wells, which compared with the known from the prior art methods and devices, a higher efficiency of Intensification of the permeability of near-bottom soil layers as well as filter bodies and filter layers is possible without there being any risk with regard to the destruction of the hole and its extensions.
- a hydraulic energy pulse E in the conveying region F of the production bore 11 is generated under metrologically precisely controllable and controllable parameters by means of a but very small volume of liquid applied by means of an underground pump 8 in the production well 11 continuously generated dynamic flow is enhanced in its effectiveness.
- a liquid for example, in the case of a well, the water originating therefrom
- Pulse generator 1 is provided, which is provided with a large-area valve, which is able to open and close within 1 to 2 milliseconds, while a previously exactly definable, very small volume of liquid under high pressure (about 300 ml) in this short time unit in the liquid to be delivered, z. B. release the surrounding well water.
- volume displacement is small due to the small volume used, rather, the molecules of the well water are set in vibration by the abrupt initiation of the high kinetic energy released small amount of liquid, and the generated thereby hydraulic energy pulse E plants due to the physical appearance as Impulse flow through the filter slots into the surrounding in the wellbore 11 fluid continues and causes by the oscillation of the liquid molecules at their respective place a detachment of encrustations on the inside and outside of the filter tube and the movement of z.
- Fines from Filterkies is set in vibration by the abrupt initiation of the high kinetic energy released small amount of liquid, and the generated thereby hydraulic energy pulse E plants due to the physical appearance as Impulse flow through the filter slots into the surrounding in the wellbore 11 fluid continues and causes by the oscillation of the liquid molecules at their respective place a detachment of encrustations on the inside and outside of the filter tube and the movement of z.
- the uninterrupted pumping is made possible by the fact that no ascending gas bubbles are generated in the method according to the invention by using very small amounts of liquid.
- the pulse generator 1 is defined during the regeneration in the conveying tube 7 in the conveying region F by means of a hose winch 5 moves up and down.
- the control signal for opening the valve of the pulse generator 1 is passed from the control unit 9 as an electrical signal via a control cable 4 to the pulse generator 1.
- the electromagnet 14 is briefly energized and the valve plate 16 opens the working chamber 12, and the here previously accumulated and provided with kinetic energy amount of liquid occurs within 1 to 1.5 milliseconds through the outlet openings 13 in the surrounding liquid to be delivered.
- the lower valve disk 17 Due to the energization of the electromagnet 14, the lower valve disk 17 is simultaneously counteracted by the pressure of a liquid located in the valve-closing chamber 15 pressed down. Immediately after relaxation of the volume in the working chamber 12, the pressure prevailing in the valve closing chamber 15 presses the lower valve plate 17 abruptly back in the opposite direction, and the valve 13 is thus closed again after about 2 to 2.5 milliseconds.
- the liquid volume located in the valve-closing chamber 15 can be varied both in its quantity and in its pressure via a closing valve 18 which can be actuated by the control unit 9.
- the volume of the working chamber 12 is also variable under operating conditions of the control unit 9 from.
- the device can be adapted to all types of development of delivery bores 11 and their diameters in their physical parameters and thus in the strength of the generated kinetic energy pulse E.
- a limitation with regard to the depth of use in the production wells 11 does not exist for the process.
- a sensor 10 is arranged, which continuously detects the energetic and temporal course of the energy pulses E and sends via a measuring line 3 to the upper-day control unit 9.
- the operator has the option, based on the recorded by the sensor 10 course of the pulse action, the change of the dynamic fluid level in the well 11 and the registerable at the pump outlet discharge of dissolved Kolmatanten constantly triggering the energy pulses E, the working pressure of the pulse generator 1 pending liquid and to control the delivery rate of the downhole pump 8.
- the method according to the invention can be precisely controlled and thus able to adapt exactly during the regeneration of a production well 11 continuously and without interrupting the regeneration process to the conditions in the hydraulic system of the production well 11 that change during processing.
- inventive method can be adapted by the complex measurability and controllability of its physical parameters to any known construction material of the production well 11.
- the filter material very brittle, such.
- the hydraulic energy pulses may only have a low energy content, so that the brittle materials are neither damaged nor destroyed in this case.
- the filter layers are also very heavily clogged (eg due to excessively long operating time without regeneration or due to extreme iron contents in the pumped medium)
- the low energy content of the pulses results in a long processing time or the permeability of the filter bodies, Filter layers and near-bottom soil layers will not be intensified to the desired extent with a reasonable processing time.
- the well to be regenerated is first processed in the manner described above. Since the filter tube W of the well to be regenerated, which is shown schematically in dashed lines in Figure 3 in section, consists of very brittle material, the energy for the hydraulic energy pulses is chosen very low in order to avoid damage to the filter tube W in all cases. Due to the low energy input, the processing time would extend considerably. If, in addition, the filter layers are particularly heavily clogged, which can occur if the well is operated too long without regeneration or even with extremely high iron contents of the groundwater, it is possible that the processing takes a disproportionately long time with the low energy input and the Colinatants are not completely removed from the filter layers at a reasonable processing time.
- the previously described method is interrupted or interrupted after the inner surfaces are cleaned and the passage openings in the filter tube W were uncovered.
- the pulse generator 1 and the downhole pump 8 are temporarily removed from the production well 11, and the pulse generator 1 is provided at its lower and upper ends with packer discs P which correlate with the inner diameter of the filter tube W located in the production well 11. Then, provided with the Packerusionn P pulse generator 1 is lowered to an end portion of the filter tube W, and by means of the pressure unit 6 is a z. B.
- the packer discs P are removed from the pulse generator 1 again after the pulses and pressing the regeneration liquid and the subsequent renewed removal of the pulse generator 1 and the downhole pump 8 from the production well 11, the pulse generator 1 and the underground pump 8 are again introduced into the production well, and the regeneration liquid is completely after a defined exposure time with upward and downward movement of the pulse generator 1 and simultaneous successive transmission of weak hydraulic energy pulses through the pulse generator 1 by means of the underground pump 8 together with the dissolved Kolmatanten pumped out.
- the method for intensifying the permeability of near-bottom soil layers as well as Filterkörpem and filter layers in the underground conveying area of wells and other production wells are then applied especially for well regeneration with advantage if the wells with particularly brittle filter tubes z. B. made of stoneware or aged PVC and the filter layers are also heavily kolmatiert.
Abstract
Description
Die Erfindung betrifft ein Verfahren und eine Vorrichtung, mit deren Hilfe die Durchlässigkeit von bohrungsnahen Bodenschichten sowie von in die Bohrung eingebrachten Filterkörpern und Filterschichten in Brunnen und anderen Förderbohrungen intensiviert werden kann.The invention relates to a method and a device with the aid of which the permeability of near-bottom soil layers as well as introduced into the bore filter bodies and filter layers in wells and other production wells can be intensified.
In Brunnen und anderen Förderbohrungen lagern sich während des Betriebes in den bohrungsnahen Bodenschichten sowie in den in die Bohrung eingebrachten Filterkörpern und Filterschichten Feststoffe und Inkrustationen ab, welche die Durchlässigkeit für das zu fördernde flüssige Medium zunehmend verschlechtern.In wells and other production wells, solids and incrustations deposit during operation in the soil layers close to the borehole as well as in the filter bodies and filter layers introduced into the borehole, which increasingly worsen the permeability to the liquid medium to be conveyed.
Um einer dadurch hervorgerufenen Verschlechterung der Förderleistung entgegenzuwirken, sind aus dem Stand der Technik verschiedene Verfahren und Vorrichtungen bekannt.In order to counteract a deterioration of the conveying performance caused thereby, various methods and devices are known from the prior art.
So beschreibt das deutsche Patent DE 195 37 689 C2 ein Verfahren zur Regenerierung eines Brunnens, bei dem ein zylindrischer Körper zwischen zwei Drahtscheiben als Zentrierung in den Brunnen hinabgesenkt wird, und durch Öffnung eines Ventils in diesem Körper ein unter hohem Druck stehendes Gas gegen die Brunnenwand beschleunigt wird. Diese Gasmenge wirkt dabei pulsierend als Druckwelle gegen die Brunnenwand, wobei die Öffnungszeitpunkte des Ventils, die austretende Gasmenge und der Gasdruck vor den Regenerierungsarbeiten im Brunnen fest eingestellt werden können.For example, German Patent DE 195 37 689 C2 describes a method for the regeneration of a well, in which a cylindrical body is lowered down between two wire disks as centering in the well, and by opening a valve in this body under high pressure gas is accelerated against the well wall. This amount of gas acts pulsating as a pressure wave against the well wall, the opening times of the valve, the exiting gas quantity and the gas pressure can be set firmly before the regeneration in the well.
Nachteilig bei diesem Verfahren ist, dass während der Arbeit im Brunnen keine zeitgleiche und sofortige Anpassung des Gasdruckes, der Gasmenge und der Öffnungszeitpunkte des Ventils an die sich durch die Bearbeitung nach jedem Impuls ändernden hydraulischen Eigenschaften des Brunnens und dessen Umgebung im Boden erfolgen können, und dass die Öffnung des Ventils nicht durch ein Signal zu einem exakt definierten Zeitpunkt erfolgt. Auch garantiert der angegebene Druck von 10 bis 25 bar keine hohe Eindringtiefe in die zu regenerierenden bohrungsnahen Bodenschichten bzw. in die Filterkörper und Filterschichten.A disadvantage of this method is that while working in the well no simultaneous and immediate adjustment of the gas pressure, the amount of gas and the opening times of the valve can be done to the changing by machining after each pulse hydraulic properties of the well and its environment in the ground, and that the opening of the valve does not occur by a signal at a precisely defined time. Also, the specified pressure of 10 to 25 bar does not guarantee a high penetration depth into the bottom layers to be regenerated or into the filter bodies and filter layers.
Aus dem DE 199 32 593 C1 ist ein weiteres Verfahren bekannt, welches mindestens einen senkrechten Bohrungsabschnitt im Brunnen, der durch zwei Packer gegenüber der übrigen Bohrung abgegrenzt wird, mit einem gasförmigen oder flüssigen Druckmittel pulsweise beaufschlagt. Das vorhandene Brunnenwasser und/oder das Druckmittel wird durch die Filterwände in die umgebenden Filterkiesschichten gepresst. Unmittelbar im Bereich des Bohrungsabschnittes wird dabei ein Druckbehälter als Pufferspeicher für das Druckmittel eingesetzt, um Druckverluste in Druckleitungen zu vermeiden.From DE 199 32 593 C1 a further method is known, which acts on at least one vertical bore portion in the well, which is delimited by two packers with respect to the remaining bore, with a gaseous or liquid pressure means pulse. The existing well water and / or the pressure medium is pressed through the filter walls into the surrounding filter gravel layers. Immediately in the region of the bore section while a pressure vessel is used as a buffer for the pressure medium to avoid pressure losses in pressure lines.
Das Wirkprinzip zur Erzielung eines Regenerierungseffektes besteht bei diesem Verfahren im pulsweisen Beaufschlagen des Bohrungsabschnittes mit einem gasförmigen oder flüssigen Druckmittel und dem dadurch hervorgerufenen Verpressen des Brunnenwassers und/oder des Druckmittels durch die Filterschlitze in die Filterkiesschichten, das heißt, es erfolgt lediglich eine Volumenverdrängung durch die Filterschlitze hindurch.The operating principle for achieving a regeneration effect consists in this method in the pulse wise acting on the bore section with a gaseous or liquid pressure medium and thereby caused pressing the well water and / or the pressure medium through the filter slots in the filter gravel layers, that is, there is only a volume displacement through the Filter slots through.
In der Patentanmeldung DE 198 43 292.5 wird weiterhin ein Verfahren vorgeschlagen, bei dem mittels plötzlicher Entspannung eines komprimierten Gases oder einer unter Druck stehenden Flüssigkeit im Brunnen Impulse freigesetzt werden. Auf Grund des in der Gegendruckkammer verwendeten bewegungsträgen Materiales ist der Öffnungs- und Schließvorgang der zur Durchführung des Verfahrens verwendeten Vorrichtung zu langsam, um einen kinetischen Energieimpuls zu erzeugen. Auch wird wiederum lediglich eine druckwechselnde Volumenverdrängung als Regeneriereffekt wirksam.The patent application DE 198 43 292.5 further proposes a method in which pulses are released by means of the sudden release of a compressed gas or a liquid under pressure in the well. Due to the moving material used in the back pressure chamber is the opening and closing operation the device used to perform the method too slow to generate a kinetic energy pulse. Again, only a pressure-changing volume displacement is again effective as a regenerating effect.
Schließlich ist ein Verfahren bekannt, bei dem zur Brunnenregenerierung Druckimpulse im Brunnen mittels Sprengladung erzeugt werden. Der Einsatz dieses Verfahrens ist auf keinen Fall bei jedem Brunnen möglich, da die erzeugten Druckimpulse sehr energiereich und kaum regelbar sind, und zu Zerstörungen des Ausbaumaterials führen können.Finally, a method is known in which pressure pulses are generated in the fountain by means of explosive charge for well regeneration. The use of this method is by no means possible with every well, since the generated pressure pulses are very energy rich and hardly controllable, and can lead to destruction of the expansion material.
Allen bekannten Verfahren liegt das gemeinsame Prinzip zugrunde, mittels kurzzeitiger und teilweise pulsierender Volumenverdrängung im Saugbereich einer Förderbohrung das dort befindliche Medium oder ein Fremdmedium durch die Filterschlitze hindurch in die umgebende Filter- und/oder Bodenschicht zu drücken. Die notwendige Volumenverdrängung wird durch die bei den einzelnen Verfahren unterschiedlich schnelle Freisetzung eines zumeist größeren Volumens eines unter Druck stehenden Fremdmediums (technisches Gas, Explosionsgas, Flüssigkeit) bewirkt.All known methods are based on the common principle, by means of short-term and partially pulsating volume displacement in the suction region of a production well to press the medium or a foreign medium through the filter slots into the surrounding filter and / or soil layer. The necessary volume displacement is effected by the release of a mostly larger volume of a pressurized foreign medium (technical gas, explosion gas, liquid) at different rates in the individual processes.
Das Prinzip der Volumenverdrängung grenzt dabei die Reichweite der bekannten Verfahren in die Bohrungsumgebung ein, da die Kompressibilität von Flüssigkeiten bekanntlich gering ist. Lediglich beim Einsatz von Sprengstoff wird durch die sehr hohe Geschwindigkeit der chemischen Umsetzung des Sprengstoffes zusätzlich ein Energieimpuls in der Flüssigkeit erzeugt, der eine große Reichweite dieses Verfahrens bewirkt, aber zugleich durch den sehr schnellen zeitlichen Ablauf zu einem "harten" Impuls führt, der für die Bohrung und die Ausbaumaterialien ein großes Risiko beinhaltet.The principle of volume displacement limits the range of known methods in the bore environment, since the compressibility of liquids is known to be low. Only when explosives are used, the very high rate of chemical reaction of the explosive additionally generates an energy pulse in the liquid, which results in a long range of this process, but at the same time leads to a "hard" pulse due to the very rapid time course the drilling and the finishing materials involves a great risk.
Der Erfindung liegt deshalb die Aufgabe zugrunde, ein Verfahren und eine Vorrichtung zur Intensivierung der Durchlässigkeit von bohrungsnahen Bodenschichten sowie von Filterkörpem und Filterschichten in Brunnen und anderen Förderbohrungen zu schaffen, die verglichen mit dem aus dem Stand der Technik bekannten Verfahren und Vorrichtungen eine höhere Effizienz der Intensivierung der Durchlässigkeit von bohrungsnahen Bodenschichten sowie von Filterkörpem und Filterschichten ermöglicht, ohne dass ein Risiko bezüglich der Zerstörung der Bohrung und deren Ausbauten besteht.The invention is therefore an object of the invention to provide a method and apparatus for intensifying the permeability of near-bottom soil layers as well as Filterkörpem and filter layers in wells and other production wells, which compared with the known from the prior art methods and devices, a higher efficiency of Intensification of the permeability of near-bottom soil layers as well as filter bodies and filter layers is possible without there being any risk with regard to the destruction of the hole and its extensions.
Die Aufgabe wird hinsichtlich des Verfahrens durch die kennzeichnenden Merkmale des Patentanspruches 1 und hinsichtlich der Vorrichtung durch die kennzeichnenden Merkmale des Patentanspruches 7 gelöst.The problem is solved in terms of the method by the characterizing features of
Vorteilhafte Ausgestaltungen des Verfahrens bilden die Merkmale der Unteransprüche 2 bis 6, während vorteilhafte Ausgestaltungen der Vorrichtung die Merkmale der Patentansprüche 8 bis 11 bilden.Advantageous embodiments of the method form the features of the
Die Erfindung soll nachfolgend anhand von bevorzugten Ausführungsbeispielen unter Bezugnahme auf die Figuren 1 bis 3 näher erläutert werden.
- Fig. 1
- zeigt schematisch einen Längsschnitt durch eine Förderbohrung mit einer darin angeordneten erfindungsgemäßen Vorrichtung;
- Fig. 2
- zeigt Einzelheiten der Struktur einer für die Durchführung des erfindungsgemäßen Verfahrens benutzten Vorrichtung.
- Fig. 3
- zeigt in einer der Fig. 1 ähnlichen Ansicht eine Förderbohrung mit einer darin angeordneten modifizierten erfindungsgemäßen Vorrichtung
- Fig. 1
- shows schematically a longitudinal section through a production well with a device according to the invention arranged therein;
- Fig. 2
- shows details of the structure of a device used for carrying out the method according to the invention.
- Fig. 3
- shows in a view similar to FIG. 1, a production well with a modified device according to the invention arranged therein
Bei dem erfindungsgemäßen Verfahren und der zugehörigen Vorrichtung wird unter messtechnisch exakt kontrollier- und steuerbaren Parametern mittels eines mit im Regelfall hoher kinetischer Energie beaufschlagten, jedoch sehr kleinen Flüssigkeitsvolumens ein hydraulischer Energieimpuls E im Förderbereich F der Förderbohrung 11 erzeugt, der durch eine mittels einer Untertagepumpe 8 in der Förderbohrung 11 kontinuierlich erzeugte dynamische Strömung in seiner Effektivität noch verstärkt wird. Entsprechend den Figuren 1 bis 3 wird von einem übertage befindlichen Druckaggregat 6 aus eine Flüssigkeit (z. B. bei einem Brunnen das aus diesem stammende Wasser) mit hohem Druck (bis zu 150 bar) in eine Druckleitung 2 eingepresst, an deren Ende sich ein Impulsgenerator 1 befindet, welcher mit einem großflächigen Ventil versehen ist, das in der Lage ist, innerhalb von 1 bis 2 Millisekunden sich zu öffnen und wieder zu schließen und dabei ein zuvor exakt definierbares, sehr kleines Volumen der unter hohem Druck stehenden Flüssigkeit (ca. 300 ml) in dieser kurzen Zeiteinheit in die zu fördernde Flüssigkeit, z. B. das umgebende Brunnenwasser freizusetzen. Der Effekt der Volumenverdrängung ist auf Grund der verwendeten kleinen Volumenmenge gering, vielmehr werden die Moleküle des Brunnenwassers durch den schlagartigen Anstoß der mit hoher kinetischer Energie freigesetzten kleinen Flüssigkeitsmenge in Schwingungen versetzt, und der dadurch erzeugte hydraulische Energieimpuls E pflanzt sich auf Grund der physikalischen Erscheinung als Impulsströmung durch die Filterschlitze hindurch in die in der Förderbohrung 11 umgebende Flüssigkeit fort und bewirkt dabei durch das Schwingen der Flüssigkeitsmoleküle an ihrem jeweiligen Platz ein Loslösen von Verkrustungen an Innen- wie Außenseiten des Filterrohres sowie das Bewegen von z. B. Feinkornanteilen aus Filterkiesschüttungen.In the method according to the invention and the associated apparatus, a hydraulic energy pulse E in the conveying region F of the
Da als Verfahrensbestandteil zeitgleich durch regelbares, kontinuierliches Abfördern mittels einer Untertagepumpe 8 eine Dynamik in der Förderbohrung 11 und ihrer Umgebung erzeugt wird, werden alle durch den hydraulischen Energieimpuls E von ihrem bisherigen Verweilort fortbewegten Bestandteile sofort abgefördert.Since as a process component at the same time by controllable, continuous removal by means of a downhole pump 8 a dynamics in the production well 11 and its environment is generated, all by the hydraulic energy pulse E of their previous residence moved away components are immediately removed.
Das ununterbrochene Abpumpen wird dadurch ermöglicht, dass beim erfindungsgemäßen Verfahren durch Verwendung kleinster Flüssigkeitsmengen keine aufsteigenden Gasblasen erzeugt werden. Der Impulsgenerator 1 wird während der Regenerierung im Förderrohr 7 im Förderbereich F mittels einer Schlauchwinde 5 definiert auf und ab bewegt.The uninterrupted pumping is made possible by the fact that no ascending gas bubbles are generated in the method according to the invention by using very small amounts of liquid. The
Das Steuersignal zum Öffnen des Ventils des Impulsgenerators 1 wird von der Steuereinheit 9 als elektrisches Signal über ein Steuerkabel 4 zum Impulsgenerator 1 geleitet.The control signal for opening the valve of the
Durch das Steuersignal wird der Elektromagnet 14 kurzzeitig energetisiert und der Ventilteller 16 öffnet die Arbeitskammer 12, und die hier zuvor angestaute und mit kinetischer Energie versehene Flüssigkeitsmenge tritt innerhalb von 1 bis 1,5 Millisekunden durch die Austrittsöffnungen 13 in die umgebende zu fördernde Flüssigkeit aus.By the control signal, the
Durch die Energetisierung des Elektromagneten 14 wird gleichzeitig der untere Ventilteller 17 gegen den Druck einer in der Ventilschließkammer 15 befindlichen Flüssigkeit nach unten gedrückt. Sofort nach Entspannung des Volumens in der Arbeitskammer 12 drückt der in der Ventilschließkammer 15 herrschende Druck den unteren Ventilteller 17 nunmehr wieder schlagartig in die umgekehrte Richtung zurück, und das Ventil 13 wird somit nach ca. 2 bis 2,5 Millisekunden wieder geschlossen. Das in der Ventilschließkammer 15 befindliche Flüssigkeitsvolumen kann sowohl in seiner Menge als auch in seinem Druck über ein von der Steuereinheit 9 betätigbares Schließventil 18 verändert werden.Due to the energization of the
Das Volumen der Arbeitskammer 12 ist ebenfalls unter Betriebsbedingungen von der Steuereinheit 9 aus veränderbar. Dadurch ist die Vorrichtung an alle Ausbauarten von Förderbohrungen 11 und deren Durchmesser in ihren physikalischen Parametern und somit in der Wirkungsstärke des erzeugten kinetischen Energieimpulses E anpassbar. Eine Eingrenzung hinsichtlich der Einsatztiefe in den Förderbohrungen 11 besteht für das Verfahren nicht.The volume of the
An dem Impulsgenerator 1 ist ein Sensor 10 angeordnet, der den energetischen und zeitlichen Verlauf der Energieimpulse E kontinuierlich erfasst und über eine Messleitung 3 an die übertägige Steuereinheit 9 sendet. Hier hat der Bediener die Möglichkeit, anhand des vom Sensor 10 erfassten Verlaufes der Impulswirkung, der Veränderung des dynamischen Flüssigkeitsspiegels in der Förderbohrung 11 und des am Pumpenauslauf registrierbaren Austrages von gelösten Kolmatanten ständig die Auslösung der Energieimpulse E, den Arbeitsdruck der am Impulsgenerator 1 anstehenden Flüssigkeit und die Förderleistung der Untertagepumpe 8 zu steuern.At the
Durch die mittels des Sensors10 erfassbaren Parameter ist das erfindungsgemäße Verfahren exakt steuerbar und damit in der Lage, während der Regenerierung einer Förderbohrung 11 sich ständig und ohne Unterbrechung des Regeneriervorganges an die sich im Verlauf der Bearbeitung verändernden Bedingungen im hydraulischen System der Förderbohrung 11 exakt anzupassen.As a result of the parameters detectable by means of the
Weiterhin kann das erfindungsgemäße Verfahren durch die komplexe Messbarkeit und Steuerbarkeit seiner physikalischen Parameter an jedes bekannte Ausbaumaterial der Förderbohrung 11 angepasst werden.Furthermore, the inventive method can be adapted by the complex measurability and controllability of its physical parameters to any known construction material of the production well 11.
Ist das Filtermaterial sehr spröde, wie z. B. bei Steinzeug oder gealtertem PVC, dürfen die hydraulischen Energieimpulse nur einen geringen Energieinhalt aufweisen, damit die spröden Materialien auch in diesem Fall weder beschädigt noch zerstört werden. Sind bei solchem sehr spröden Filtermaterial die Filterschichten auch noch besonders stark kolmatiert (z. B. durch zu lange Betriebszeit ohne Regenerierung oder durch extreme Eisengehalte im Fördermedium), ergibt sich durch den geringen Energieinhalt der Impulse eine lange Bearbeitungsdauer bzw. die Durchlässigkeit der Filterkörper, Filterschichten und bohrungsnahen Bodenschichten wird bei vertretbarer Bearbeitungsdauer nicht im gewünschten Maße intensiviert.Is the filter material very brittle, such. As with stoneware or aged PVC, the hydraulic energy pulses may only have a low energy content, so that the brittle materials are neither damaged nor destroyed in this case. With such a very brittle filter material, if the filter layers are also very heavily clogged (eg due to excessively long operating time without regeneration or due to extreme iron contents in the pumped medium), the low energy content of the pulses results in a long processing time or the permeability of the filter bodies, Filter layers and near-bottom soil layers will not be intensified to the desired extent with a reasonable processing time.
In diesem Falle werden das erfindungsgemäße Verfahren und die erfindungsgemäße Vorrichtung in der Weise modifiziert wie dies in Fig. 3 dargestellt ist und im folgenden beschrieben werden soll.In this case, the method according to the invention and the device according to the invention are modified in the manner shown in FIG. 3 and will be described below.
Bei der in Figur 3 dargestellten Förderbohrung 11 handelt es sich um einen Brunnen zur Trinkwassergewinnung.In the production well 11 shown in Figure 3 is a well for drinking water.
Der zu regenerierende Brunnen wird zunächst in der zuvor beschriebenen Weise bearbeitet. Da das Filterrohr W des zu regenerierenden Brunnens, welches in Figur 3 mit gestrichelten Linien im Schnitt schematisch dargestellt ist, aus sehr sprödem Material besteht, wird die Energie für die hydraulischen Energieimpulse sehr niedrig gewählt, um Beschädigungen des Filterrohres W auf alle Fälle zu vermeiden. Durch den geringen Energieeintrag würde sich die Bearbeitungsdauer beträchtlich verlängern. Kommt nun noch hinzu, dass auch die Filterschichten besonders stark kolmatiert sind, was bei zu langer Betriebszeit des Brunnens ohne Regenerierung oder auch bei extrem hohen Eisengehalten des Grundwassers auftreten kann, ist es möglich, dass die Bearbeitung bei dem geringen Energieeintrag unverhältnismäßig lange dauert und die Kolinatanten bei vertretbarer Bearbeitungsdauer nicht vollständig aus den Filterschichten entfernt werden.The well to be regenerated is first processed in the manner described above. Since the filter tube W of the well to be regenerated, which is shown schematically in dashed lines in Figure 3 in section, consists of very brittle material, the energy for the hydraulic energy pulses is chosen very low in order to avoid damage to the filter tube W in all cases. Due to the low energy input, the processing time would extend considerably. If, in addition, the filter layers are particularly heavily clogged, which can occur if the well is operated too long without regeneration or even with extremely high iron contents of the groundwater, it is possible that the processing takes a disproportionately long time with the low energy input and the Colinatants are not completely removed from the filter layers at a reasonable processing time.
Deshalb wird in solchen Fällen das zuvor beschriebene Verfahren abgebrochen oder unterbrochen, nachdem die Innenflächen gereinigt und die Durchlassöffnungen im Filterrohr W freigelegt wurden. Der Impulsgenerator 1 und die Untertagepumpe 8 werden aus der Förderbohrung 11 vorübergehend entnommen, und der Impulsgenerator 1 wird an seinem unteren und oberen Ende mit Packerscheiben P versehen, die mit dem Innendurchmesser des in der Förderbohrung 11 befindlichen Filterrohres W korrelieren. Dann wird der mit den Packerscheiben P versehene Impulsgenerator 1 bis zu einem Endabschnitt des Filterrohres W abgesenkt, und mittels des Druckaggregates 6 wird eine z. B. handelsüblich zur Verfügung stehende Regenerierflüssigkeit, über den Druckschlauch 2 und den Impulsgenerator 1 mit schwachen Energieimpulsen E durch die freigelegten Durchlassöffnungen des Filterrohres W hindurch in die Umgebung der Förderbohrung 11, d. h. bei der Brunnenregenerierung in den Aquifer A hineingepulst bzw. hineingepresst. Dies geschieht abschnittweise, jeweils aufeinander folgend etwa im Abstand der Packerscheiben P am Impulsgenerator 1, bis das andere Ende des Filterrohres W erreicht ist. Danach wird der Impulsgenerator 1 mit den daran befestigten Packerscheiben P aus der Förderbohrung 11 wieder entnommen, und die Untertagepumpe 8 wird wieder in die Förderbohrung 11 eingebracht. Nach definierter Einwirkungszeit der Regenerierflüssigkeit wird dann die Untertagepumpe 8 wieder in Gang gesetzt, und die Regenerierflüssigkeit wird zusammen mit den gelösten Kolmatanten vollständig abgepumpt. Danach wird, wie nach jeder Brunnenregenerierung üblich, eine Intensiventnahme von Wasser vorgenommen.Therefore, in such cases, the previously described method is interrupted or interrupted after the inner surfaces are cleaned and the passage openings in the filter tube W were uncovered. The
Um den Reinigungseffekt des vorstehend beschriebenen modifizierten erfindungsgemäßen Verfahrens noch weiter zu verstärken, werden nach dem Einpulsen und Einpressen der Regenerierflüssigkeit und der darauf folgenden erneuten Entnahme des Impulsgenerators 1 und der Untertagepumpe 8 aus der Förderbohrung 11 die Packerscheiben P vom Impulsgenerator 1 wieder entfernt, der Impulsgenerator 1 und die Untertagepumpe 8 werden erneut in die Förderbohrung eingebracht, und die Regenerierflüssigkeit wird nach definierter Einwirkungszeit unter Auf- und Abwärtsbewegen des Impulsgenerators 1 und unter gleichzeitiger sukzessiver Aussendung von schwachen hydraulischen Energieimpulsen durch den Impulsgenerator 1 mittels der Untertagepumpe 8 zusammen mit den gelösten Kolmatanten vollständig abgepumpt.To further enhance the cleaning effect of the above-described modified method according to the invention, the packer discs P are removed from the
Mittels der beiden letztgenannten modifizierten Ausführungsformen der Erfindung kann das Verfahren zur Intensivierung der Durchlässigkeit von bohrungsnahen Bodenschichten sowie von Filterkörpem und Filterschichten im untertägigen Förderbereich von Brunnen und anderen Förderbohrungen auch dann vor allem zur Brunnenregenerierung mit Vorteil angewandt werden, wenn die Brunnen mit besonders spröden Filterrohren z. B. aus Steinzeug oder aus gealtertem PVC versehen und die Filterschichten zusätzlich stark kolmatiert sind.By means of the latter two modified embodiments of the invention, the method for intensifying the permeability of near-bottom soil layers as well as Filterkörpem and filter layers in the underground conveying area of wells and other production wells are then applied especially for well regeneration with advantage if the wells with particularly brittle filter tubes z. B. made of stoneware or aged PVC and the filter layers are also heavily kolmatiert.
Claims (11)
- Method for intensifying the permeability of ground layers (B) close to boreholes and of filter bodies and filter layers (W) in the underground extraction area (F) of water wells and other production wells (11), whereby liquid is continuously pumped away in the extraction area (F) of the borehole (11) by an underground pump (8), and the liquid thus displaced is successively impinged upon by energy pulses (E) in the direction of the borehole walls, the filter bodies and the filter layers (W) by continuously moving a pulse generator (1) up and down in the extraction area (F),
characterised in that the effect of each energy pulse (E) is evaluated by means of seismic measurements, and the parameters of the following energy pulses (E) are determined according to the evaluation of the measuring results obtained for the previous energy pulse (E). - Method according to claim 1,
characterised in that the energy pulses (E) are generated by a surface pressure unit (6) that is connected in leak-proof manner via a pressure line (2) with the pulse generator (1) moved in the extraction area (F), said pressure unit (6) exerting a high pressure on a liquid which is introduced via the pressure line (2) in the pulse generator and ejecting said liquid at a defined pressure and for a defined period out of the pulse generator (1) into the liquid to be extracted. - Method according to claim 1 and/or 2,
characterised in that the effect of each energy pulse (E) is registered by means of a seismic sensor (10) installed in situ on the pulse generator (1), transmitted via an instrument lead (3) to a control unit (9) located at the surface and evaluated there, and that after evaluation of the measuring signals, the parameters of the following energy pulse (E) are defined by adjusting the pressure exerted by the pressure unit (6) and by at least one control signal that is transmitted via a control cable (4) and triggers the pulse generator (1) at the defined time. - Method according to at least one of the preceding claims,
characterised in that a plurality of control signals are transmitted to the pulse generator (1) to trigger the pulse generator (1) at the defined time, to set the liquid volume for the hydraulic pulse and to define the duration of the energy pulse (E). - Method according to at least one of the preceding claims,
characterised in that regeneration work is performed with weak energy pulses and, after the internal surfaces have been cleaned and the apertures in the screen (W) unclogged, is discontinued or interrupted, that the pulse generator (1) and the underground pump (8) are temporarily withdrawn from the production well (11) and the pulse generator (1) provided at its upper and lower ends with packer disks (P) that correspond to the internal diameter of the screen (W), that thereafter, the pulse generator (1) provided with the packer disks (P) is lowered to a terminal section of the screen (W) and, by means of the pressure unit (6), a regenerating liquid is pulsed or pressed via the pressure hose (2) and the pulse generator (1) with weak energy pulses (E) through the unclogged apertures in the screen (W) into the surroundings of the production well (11), i.e. into the aquifer (A), this procedure being repeated successively in sections corresponding approximately to the distance between the packer disks (P) on the pulse generator (1) until the other end of the screen (W) has been reached, that the pulse generator (1) is then withdrawn again from the production well (11), the underground pump (8) lowered once more into the production well (11) and the regenerating liquid, after a defined period of action, pumped out completely along with the dissolved colmatants by the underground pump (8). - Method according to claim 5,
characterised in that after the pulsing and pressing in of regenerating liquid and the subsequent withdrawal of the pulse generator (1) and the underground pump (8) from the production well (11), the packer disks (P) are detached again from the pulse generator (1) and the pulse generator (1) and the underground pump (8) then lowered once more into the production well, and that the regenerating liquid, after a defined period of action during concurrent up-and-down movement of the pulse generator (1) and simultaneous, successive emission of weak hydraulic energy pulses by the pulse generator (1), is pumped out completely, along with the dissolved colmatants, by means of the underground pump (8). - Device for carrying out the method of claims 1 to 4, a pulse generator (1) that can be lowered into the extraction area (F) of the borehole (11) and moved up and down in said extraction area (F), and an underground pump (8) that can be lowered into the extraction area of the borehole (11),
characterised by a seismic sensor (10) installed on the pulse generator (1), a surface-located control unit (9) that is connected via an instrument lead and a control cable (3, 4) to the seismic sensor (10) and the pulse generator (1) respectively and a surface-located pressure unit (6) connected via a pressure line (2) to the pulse generator (1). - Device according to claim 7,
characterised in that the pulse generator (1) comprises: a cylinder in the upper portion of which a working chamber (12) of variable volume is located, said working chamber (12) being connected with the pressure line (2) and having outflow apertures (13) that are closed in the non-operative state, and in the lower portion of which a valve-closing chamber (15) is located, the two chambers being operatively interconnected by an electromagnetically operated valve piston (V) that can be moved downwards by momentary energisation of an electromagnet (14), thereby opening, by means of an upper valve disk (16) attached to the valve piston, the outflow apertures (13) and releasing the excessive pressure in the working chamber (12) as a hydraulic pulse; when the valve piston moves down, a lower valve disk (17) attached thereto causes a strong pressure increase in the valve-closing chamber (15), and immediately after the pressure in the working chamber (12) has been reduced, the valve piston (V) can be pushed back into its starting position by means of the valve disk (17). - Device according to claim 7 and/or 8, characterised in that the liquid volume in the valve-closing chamber (15) and the pressure are controllable via a closing valve (18).
- Device according to at least one of the claims 7 to 9 for carrying out the method according to claim 5 and 6,
characterised in that the upper and lower ends of the pulse generator (1) are each provided at times with a packer disk (P). - Device according to claim 10, characterised in that the diameter of the packer disks (P) corresponds to the internal diameter of the screen (W) of the production well.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10301338 | 2003-01-15 | ||
| DE2003101338 DE10301338B3 (en) | 2003-01-15 | 2003-01-15 | Increasing permeability of productive strata and filter layers close to well borehole, inserts generator superimposing pressure pulses on production flow |
| DE10361983A DE10361983B4 (en) | 2003-01-15 | 2003-12-18 | Method and device for intensifying the permeability of near-bottom soil layers as well as filter bodies and filter layers in wells and other production wells |
| DE10361983 | 2003-12-18 | ||
| PCT/EP2004/000056 WO2004063524A1 (en) | 2003-01-15 | 2004-01-08 | Method and device for intensifying the permeability of ground layers close to bore holes and filter bodies and filter layers in wells and other production wells |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP1583887A1 EP1583887A1 (en) | 2005-10-12 |
| EP1583887B1 true EP1583887B1 (en) | 2006-05-17 |
| EP1583887B8 EP1583887B8 (en) | 2006-08-30 |
Family
ID=32714790
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP04700687A Expired - Lifetime EP1583887B8 (en) | 2003-01-15 | 2004-01-08 | Method and device for intensifying the permeability of ground layers close to bore holes and filter bodies and filter layers in wells and other production wells |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US7360596B2 (en) |
| EP (1) | EP1583887B8 (en) |
| AT (1) | ATE326610T1 (en) |
| DE (2) | DE10361983B4 (en) |
| ES (1) | ES2260745T3 (en) |
| WO (1) | WO2004063524A1 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7665517B2 (en) | 2006-02-15 | 2010-02-23 | Halliburton Energy Services, Inc. | Methods of cleaning sand control screens and gravel packs |
| US20090120633A1 (en) * | 2007-11-13 | 2009-05-14 | Earl Webb | Method for Stimulating a Well Using Fluid Pressure Waves |
| US8382446B2 (en) * | 2009-05-06 | 2013-02-26 | Baker Hughes Incorporated | Mini-surge cycling method for pumping liquid from a borehole to remove material in contact with the liquid |
| US8230934B2 (en) | 2009-10-02 | 2012-07-31 | Baker Hughes Incorporated | Apparatus and method for directionally disposing a flexible member in a pressurized conduit |
| US8839856B2 (en) | 2011-04-15 | 2014-09-23 | Baker Hughes Incorporated | Electromagnetic wave treatment method and promoter |
| EP3098378A1 (en) * | 2015-05-26 | 2016-11-30 | Extra Gas and Oil Solutions GmbH | Method for recovery of oil and/or gas |
| US10233607B2 (en) * | 2017-02-12 | 2019-03-19 | Bahman Niroumand | Comprehensive excavation process |
| EP3971386B1 (en) | 2020-09-17 | 2023-07-05 | Suez International | Well regenerating apparatus and method |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19537689C2 (en) | 1994-10-11 | 1998-03-19 | Tegeo Gmbh | Process for cleaning well systems and device for carrying out the process |
| GB9706044D0 (en) * | 1997-03-24 | 1997-05-14 | Davidson Brett C | Dynamic enhancement of fluid flow rate using pressure and strain pulsing |
| DE19843292C2 (en) | 1998-09-22 | 2003-06-12 | Lothar Spitzner | Device for the regeneration and cleaning of wells, pipelines and containers |
| DE19913239C2 (en) * | 1999-03-23 | 2002-09-19 | Tegeo Gmbh | Process for cleaning well systems and device for carrying out the process |
| DE19932593C1 (en) * | 1999-07-13 | 2001-05-23 | Aquaplus Brunnensanierung H Mu | Generation method for pulsating pressure waves for well regeneration supplies pulsating pressure medium via buffer store into working section in well, to press water through filter walls into filter gravel |
| US6427774B2 (en) * | 2000-02-09 | 2002-08-06 | Conoco Inc. | Process and apparatus for coupled electromagnetic and acoustic stimulation of crude oil reservoirs using pulsed power electrohydraulic and electromagnetic discharge |
| GB0101806D0 (en) * | 2001-01-24 | 2001-03-07 | Geolink Uk Ltd | A pressure pulse generator |
| US6533035B2 (en) * | 2001-04-24 | 2003-03-18 | Layne Christensen Company | Method and apparatus for stimulating well production |
-
2003
- 2003-12-18 DE DE10361983A patent/DE10361983B4/en not_active Expired - Lifetime
-
2004
- 2004-01-08 WO PCT/EP2004/000056 patent/WO2004063524A1/en active Search and Examination
- 2004-01-08 ES ES04700687T patent/ES2260745T3/en not_active Expired - Lifetime
- 2004-01-08 AT AT04700687T patent/ATE326610T1/en active
- 2004-01-08 DE DE502004000586T patent/DE502004000586D1/en not_active Expired - Lifetime
- 2004-01-08 EP EP04700687A patent/EP1583887B8/en not_active Expired - Lifetime
- 2004-01-08 US US10/541,945 patent/US7360596B2/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| DE10361983A1 (en) | 2005-07-14 |
| DE502004000586D1 (en) | 2006-06-22 |
| ATE326610T1 (en) | 2006-06-15 |
| WO2004063524A1 (en) | 2004-07-29 |
| DE10361983B4 (en) | 2013-05-02 |
| EP1583887B8 (en) | 2006-08-30 |
| US7360596B2 (en) | 2008-04-22 |
| ES2260745T3 (en) | 2006-11-01 |
| US20060137872A1 (en) | 2006-06-29 |
| EP1583887A1 (en) | 2005-10-12 |
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