CN108952630B - Method for removing blockage and increasing permeability by using ultra-high-power ultrasonic waves - Google Patents
Method for removing blockage and increasing permeability by using ultra-high-power ultrasonic waves Download PDFInfo
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- 230000001965 increasing effect Effects 0.000 title claims abstract description 35
- 230000035699 permeability Effects 0.000 title claims abstract description 34
- 238000002386 leaching Methods 0.000 claims abstract description 65
- 229910052770 Uranium Inorganic materials 0.000 claims abstract description 47
- JFALSRSLKYAFGM-UHFFFAOYSA-N uranium(0) Chemical compound [U] JFALSRSLKYAFGM-UHFFFAOYSA-N 0.000 claims abstract description 47
- 238000011065 in-situ storage Methods 0.000 claims abstract description 40
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- 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
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- 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
- E21B28/00—Vibration generating arrangements for boreholes or wells, e.g. for stimulating production
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Abstract
The invention relates to a method for removing blockage and increasing permeability by using ultra-high power ultrasonic waves. The method comprises the following steps: (1) determining a plurality of target positions uniformly spaced in the height direction of a filter of an in-situ leaching uranium mining drill hole; (2) more than two ultrasonic transducers with different frequencies are adopted for each target position to generate ultrasonic waves, so that blockage removal and infiltration increasing operations are carried out for 60-100 min respectively; wherein, the power of ultrasonic transducer is 5 ~ 30 kW. The method can have obvious blockage removal and permeability increase effects on the drill hole of the in-situ leaching mountain and the uranium reservoir layer around the drill hole, and improve the permeability and connectivity of the in-situ leaching mountain layer; the method provided by the invention has the advantages that the yield of the liquid injection hole and the liquid extraction hole is obviously improved under the condition that the concentration of the leaching liquid is not changed, so that the actual extraction amount of uranium in the in-situ leaching mine is obviously improved.
Description
Technical Field
The invention belongs to the technical field of in-situ leaching uranium mining, and particularly relates to a method for removing blockage and increasing permeability by using ultra-high-power ultrasonic waves.
Background
In-situ leaching uranium mining in-situ leaching mines is an integrated uranium ore mining method for selectively dissolving uranium in ores through chemical reaction of leaching reagents and minerals under natural burial conditions without causing displacement of the ores, and people are used to divide in-situ leaching processes into two major types, namely an acid method and an alkaline method according to different leaching reagents for a long time. The in-situ leaching uranium mining has the advantages of low cost, short mining period, environmental friendliness and the like which are incomparable to conventional mining, and the in-situ leaching uranium mining amount accounts for the total yield of the natural uranium in the world and is increased year by year in the 21 st century, wherein the in-situ leaching uranium mining amount reaches 45% in 2011. The reserves of the uranium ores discovered in 15 years since 2000 in China are equivalent to the sum of reserves of the uranium ores discovered in 45 years, so that the sandstone-type uranium ores become the main types of uranium resources in China, and at present, the proportion of the sandstone-type uranium ores in the total reserves of the uranium ores discovered in China is increased from 15% in 2000 to more than 40% at present. With the annual increase of the exploration of sandstone-type uranium resources, the development of sandstone-type uranium resources becomes one of the most important potentials for improving the natural uranium productivity in China.
The water-filling capacity and permeability of sandstone deposits are the determining factors for the technical feasibility of in-situ leaching of uranium. The permeability of sandstone-type uranium deposit in China is generally low, the permeability (permeability coefficient) of the deposit is less than 0.5m/d, and low-permeability resources account for more than 70% of sandstone-type resources. Due to low ore permeability, the drilling liquid pumping and injecting capacity is small, the production capacity is low, the pumping and injecting are unbalanced, and the leaching period is long. Thus, the permeability of the subterranean mine formation is to be improved.
In the process of in-situ leaching uranium mining, both the acid leaching process and the alkaline leaching process can cause chemical blockage of a working well (a drill hole), particularly a filter position of the working well, and the chemical blockage is caused by the existence of components in the formation of the in-situ leaching mine, wherein the components react with leaching reagents to generate inorganic salt and other precipitates. These inorganic salt deposits reinforce the blockage of the filters of the drilled holes by bacterial action, which makes it extremely difficult to restore the liquid extraction or injection of the drill holes for in-situ leaching of uranium by flushing the working wells of the in-situ leaching mine. At present, in-situ leaching uranium mining, no matter mechanical well washing or chemical well washing, the capability of a filter can not be recovered as before; in addition, the concentration of leachate of the in-situ leaching uranium mining drill hole is reduced after mechanical well flushing and chemical well flushing are adopted, and the yield of uranium is seriously influenced. In a word, due to the existence of chemical blockage, the liquid pumping quantity or liquid injection quantity of the in-situ leaching uranium extraction drill hole of the in-situ leaching mine is seriously reduced, and the operation well can be scrapped due to the serious chemical blockage, so that the yield of the in-situ leaching mine is seriously influenced. Previous studies have therefore generally considered replacing filters as the most effective way to address chemical blockages. At present, in order to enable the operation well of the in-situ leaching mine to operate repeatedly, research at home and abroad is also focused on the improvement of the filter in the drilling hole for in-situ leaching uranium mining and the research on a method for replacing the filter. The operation of replacing the filter is complex and the cost is high; furthermore, the method of replacing the filter is also only capable of solving the problem of chemical clogging of the filter position, but is not capable of improving the permeability and communication state of the earth-leaching formation.
In the process of oil-water well development, the mixture formed by mud, paraffin, asphaltene, high molecular polymer and the like is easy to cause serious blockage in the oil-water well and the near-wellbore area, and the injection and production effect is influenced. Therefore, in the oil extraction engineering, the comprehensive action of the ultrasonic technology on stratum porous media, crude oil, water, high molecular polymers and the like is utilized, the oil layer blockage and pollution are removed, the dirt deposition is prevented, the rock surface wettability is enhanced, the oil displacement capacity of an oil well is improved, and the recovery rate is finally improved. However, the pressure, communication state and environment of the stratum where the operation well and the oil well are located in the ground leaching mountain are completely different from those of the substances causing chemical blockage, and the existing ultrasonic blockage removing and injection increasing method is only suitable for engineering such as oil exploitation.
Disclosure of Invention
The invention aims to provide a method for removing blockage and increasing permeability by using ultra-high power ultrasonic waves, which can have obvious blockage removing and permeability increasing effects on a drill hole of an in-situ leaching mine and a uranium reservoir layer around the drill hole, and improve the permeability and the connectivity of the stratum of the in-situ leaching mine.
In order to achieve the purpose, the invention provides a method for removing blockage and increasing permeability by using ultra-high power ultrasonic waves, which comprises the following steps:
(1) determining a plurality of target positions uniformly spaced in the height direction of a filter of an in-situ leaching uranium mining drill hole;
(2) more than two ultrasonic transducers with different frequencies are adopted for each target position to generate ultrasonic waves, so that blockage removal and infiltration increasing operations are carried out for 60-100 min respectively;
wherein, the power of ultrasonic transducer is 5 ~ 30 kW.
Preferably, the plurality of target positions start at the uppermost end or the lowermost end of the filter.
Preferably, in the step (2), the blockage removing and infiltration increasing operation is performed on each target position in sequence along the height direction of the filter from the starting position.
Preferably, the distance between two adjacent target positions is 0.8-1.2 m.
Preferably, the power of the ultrasonic transducer is 15-25 kW.
Preferably, in the step (2), more than two ultrasonic transducers with different frequencies are adopted to generate ultrasonic waves for each target position according to a frequency decreasing mode to perform blockage removing and infiltration enhancing operation; the frequency of the ultrasonic transducer is 18-40 kHz.
Preferably, in the step (2), for each target position, three ultrasonic transducers with different frequencies are adopted to generate ultrasonic waves in a frequency decreasing manner to perform blockage removing and infiltration enhancing operation; the three ultrasonic transducers with different frequencies comprise a first ultrasonic transducer, a second ultrasonic transducer and a third ultrasonic transducer; the frequency of the first ultrasonic transducer is 25-40 kHz, the frequency of the second ultrasonic transducer is 22-28 kHz, and the frequency of the third ultrasonic transducer is 18-22 kHz.
Preferably, in step (1), each of the target positions is determined by a magnetic locator.
Preferably, in step (2), the ultrasonic transducer is sent to the target position through a composite transmission cable, and the composite transmission cable transmits the electric energy generated by the ultrasonic driving power supply to the ultrasonic transducer, and the ultrasonic transducer converts the electric energy to generate ultrasonic waves to perform the blockage removing and infiltration enhancing operation.
Preferably, the power of the ultrasonic driving power supply is 20-100 kW.
Compared with the prior art, the method of the invention at least has the following beneficial effects:
(1) the method has obvious blockage removal and seepage increase effects on in-situ leaching uranium mining drill holes; the method provided by the invention has the advantages that the blockage of the in-situ leaching uranium mining drill hole is removed, the stratum around the drill hole is also subjected to blockage removal and permeability increase, the permeability and the connectivity of the stratum of the in-situ leaching mine are improved, the improvement on the sand body structure of the uranium reservoir is realized, and the single-hole productivity and the overall recovery rate of the in-situ leaching mountain mining area are improved.
(2) The method improves the liquid injection amount of the liquid injection hole and the liquid pumping amount of the liquid pumping hole, and simultaneously, the concentration of the leaching liquid is not changed; the method provided by the invention has the advantages that the yield of the liquid injection hole and the liquid extraction hole is obviously improved under the condition that the concentration of the leaching liquid is not changed, so that the actual extraction amount of uranium in the in-situ leaching mine is obviously improved.
(3) The method utilizes the ultra-high power ultrasonic wave to remove the blockage and increase the permeability, and has no pollution, no damage to the ground leaching mine stratum, repeated operation, no pollution, low energy consumption and low cost compared with the prior art; the method can be popularized and operated in the large-area land leaching mountain, so that the overall yield of uranium is better improved.
Drawings
FIG. 1 is a plan view of a borehole being treated with ultra-high power ultrasound for enhanced permeability removal in accordance with certain embodiments of the present invention.
FIG. 2 is a graph showing the relationship change between the concentration of the leaching solution and the oxidation-reduction potential of the leaching solution and the time when the KC2306 leaching hole is subjected to pumping and injecting before and after the plugging and infiltration increasing operation is carried out by using ultra-high power ultrasonic waves.
FIG. 3 is a graph showing the relationship change between the concentration of the leaching solution and the oxidation-reduction potential of the leaching solution and the time when the KC2704 leaching hole is subjected to pumping and injecting operations before and after the plugging and permeability increasing operation is carried out by using ultra-high power ultrasonic waves.
FIG. 4 is a graph showing the relationship between the metal concentration of the leachate during the operation of pumping through the pumping holes distributed around the KC2306 and KC2704, and the time.
FIG. 5 is a graph showing the relationship between the residual acid concentration of the leachate during the pumping operation in the pumping holes distributed around the KC2306 and KC2704 pumping holes and the time.
Wherein, in fig. 2 and 3: u represents the metal concentration of the leachate, and the unit is mg/L; h+The concentration of the residual acid in the leachate is expressed in g/L; eh represents the oxidation-reduction potential value of the leaching solution, and the unit is-mV.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The invention provides a method for removing blockage and increasing permeability by using ultra-high power ultrasonic waves, which comprises the following steps:
(1) determining a plurality of target positions uniformly spaced in the height direction of a filter of an in-situ leaching uranium mining drill hole;
(2) ultrasonic wave is generated by adopting more than two ultrasonic transducers with different frequencies at each target position, so that blockage removal and infiltration increasing operations are carried out for 60-100 min (for example, 60, 70, 80, 90 or 100 min);
wherein the power of the ultrasonic transducer is 5-30 kW (for example, 5, 8, 10, 12, 15, 18, 20, 22, 25, 28 or 30 kW).
The invention utilizes the mechanical effect and the cavitation effect of the ultra-high power ultrasonic wave to improve the interfacial structure, the porosity and the like of various forms of substances in an ore bed, loosen the ore bed and improve the permeability and the communication state of the ground leaching mine stratum. In the invention, the operation is carried out at intervals along the height direction of the filter of the drilled hole, the ultrasonic transducer with the power of 5-30 kW is adopted to generate ultra-high-power ultrasonic waves for operation, the blockage removal of the chemical blockage in the ground leaching drilled hole cannot be realized only by the operation at the middle position in the filter or the operation of low-power ultrasonic waves, and the permeability and the communication state of the ground leaching mountain land layer cannot be improved.
In the invention, more than two ultrasonic transducers with different frequencies are required to be adopted for each target position to generate ultrasonic waves for blockage removal and infiltration increase operation, so that the success rate of the operation of the in-situ leaching mountain land layer can be greatly improved.
In the invention, more than two ultrasonic transducers with different frequencies are required to be adopted for each target position to generate ultrasonic waves for deblocking and permeation-increasing operation for 60-100 min respectively, at the moment, the deblocking and permeation-increasing effect of the ultrasonic waves is the best, the influence of the ultrasonic cavitation phenomenon is the largest, the cavitation phenomenon can improve the permeability and the connectivity of the ground-immersed mine stratum, and the negative effect caused by the cavitation phenomenon with overlong time and high intensity cannot be ignored.
In particular, the plugging removal and infiltration increase operation is carried out under the condition of water flooding, acid flooding or gas flooding on the in-situ leaching uranium mining drill hole.
According to some preferred embodiments, in step (2), ultrasonic waves generated by more than two ultrasonic transducers with different frequencies are used for each target position to perform blockage removal and infiltration increasing operation for 60 min.
According to some preferred embodiments, the plurality of target positions start at the uppermost end or the lowermost end of the filter. The uppermost end or the lowermost end of the filter is the uppermost end or the lowermost end of the filter in the height direction.
It should be noted that, in the present invention, for convenience of description, the starting position may be referred to as the first target position; the remaining target positions that are evenly spaced along the height of the filter from the starting position will be referred to as the second target position, the third target position, the fourth target position, etc. and this description is for descriptive purposes only and is not to be construed as indicating or implying relative importance.
According to some preferred embodiments, in the step (2), the blockage removing and infiltration increasing operation is performed on each target position in sequence along the height direction of the filter from the starting position.
According to some preferred embodiments, the distance between two adjacent target positions is 0.8 to 1.2m (e.g. 0.8, 0.9, 1.0, 1.1 or 1.2m), preferably 1 m. In the invention, the distance between two adjacent target positions is preferably 0.8-1.2 m, and under the distance, the comprehensive effect of ultrasonic operation is best.
According to some preferred embodiments, in the step (2), ultrasonic waves generated by more than two ultrasonic transducers with different frequencies are adopted for each target position according to a frequency decreasing mode to perform blockage removing and infiltration enhancing operation; the frequency (natural frequency) of the ultrasonic transducer is 18-40 kHz (such as 18, 20, 22, 25, 28, 30, 32, 35, 38 or 40 kHz). In the invention, more than two ultrasonic transducers with different frequencies are adopted to generate ultrasonic waves to perform blockage removing and permeation increasing operation on each target position according to a frequency decreasing mode, namely, more than two ultrasonic blockage removing and permeation increasing operations with different frequencies are adopted on each target position from high to low, so that the blockage removing and permeation increasing effect is optimal.
According to some preferred embodiments, in the step (2), ultrasonic waves generated by three ultrasonic transducers with different frequencies are adopted for each target position according to a frequency decreasing mode to perform blockage removal and infiltration increasing operation; the three ultrasonic transducers with different frequencies comprise a first ultrasonic transducer, a second ultrasonic transducer and a third ultrasonic transducer; the frequency of the first ultrasonic transducer is 25-40 kHz, the frequency of the second ultrasonic transducer is 22-28 kHz, and the frequency of the third ultrasonic transducer is 18-22 kHz. In other words, in the invention, preferably, at each target position, the high-frequency first ultrasonic transducer is firstly used for carrying out the deblocking and permeation-increasing operation for 60-100 min, then the middle-frequency second ultrasonic transducer is used for carrying out the deblocking and permeation-increasing operation for 60-100 min, and finally the low-frequency third ultrasonic transducer is used for carrying out the deblocking and permeation-increasing operation for 60-100 min.
According to some more specific embodiments, the process of using the ultra-high power ultrasonic wave to remove the blockage and increase the permeability is, for example:
(a) sending a first ultrasonic transducer to a first target position in the in-situ leaching uranium mining drilling filter, and then enabling the first ultrasonic transducer to generate ultrasonic waves and carrying out blockage removal and permeation enhancement operation at the first target position for 60-100 min;
(b) after the first ultrasonic transducer finishes the operation at the first target position, taking out the first ultrasonic transducer, replacing a second ultrasonic transducer, then sending the second ultrasonic transducer to the first target position, enabling the second ultrasonic transducer to generate ultrasonic waves, and performing blockage removal and infiltration enhancement operation at the first target position for 60-100 min;
(c) after the second ultrasonic transducer finishes the operation at the first target position, taking out the second ultrasonic transducer, replacing a third ultrasonic transducer, sending the third ultrasonic transducer to the first target position, enabling the third ultrasonic transducer to generate ultrasonic waves, and performing blockage removal and infiltration enhancement operation at the first target position for 60-100 min;
(d) and (c) on the basis of completing the blockage removing and permeability increasing operation on the first target position, sequentially repeating the steps (a) to (c) to perform the blockage removing and permeability increasing operation on the second target position, and repeating the steps continuously until the blockage removing and permeability increasing operation with the preset target position number is completed.
According to some preferred embodiments, the power of the ultrasonic transducer is 15 to 25kW (e.g. 15, 18, 20, 22 or 25kW), preferably 18 kW. In the invention, the power of the ultrasonic transducer is preferably 15-25 kW; if the power of the ultrasonic transducer is too low, the ultrasonic energy applied to the filter is less, which results in poor ultrasonic blockage removal and infiltration enhancement effects.
According to some preferred embodiments, in step (1), each of the target positions is determined by a magnetic locator.
According to some preferred embodiments, in step (2), the ultrasonic transducer is sent to the target position through a composite transmission cable, and the composite transmission cable transmits the electric energy generated by the ultrasonic driving power supply to the ultrasonic transducer, and the ultrasonic transducer converts the electric energy to generate ultrasonic waves to perform blockage removal and infiltration promotion operations.
According to some preferred embodiments, the power of the ultrasonic driving power source is 20 to 100kW (for example, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, or 100 kW).
According to some preferred embodiments, the method further comprises the step of monitoring the temperature, current and voltage of the ultrasonic transducer during operation by a monitoring module. In particular, the temperature of the ultrasonic transducer during operation can be controlled, for example, between-40 ℃ and 120 ℃; for example, the voltage when the ultrasonic transducer is operated can be 380v or 660 v.
According to some preferred embodiments, the method for removing the blockage and increasing the permeability by using the ultra-high-power ultrasonic wave is carried out by using a power ultrasonic device, the device comprises a surface system and a downhole system, and the surface system is connected with the downhole system through a composite transmission cable. The ground system comprises a vehicle, a ground controller, an ultrasonic driving power supply connected with the ground controller, a turning pulley arranged in the vehicle and a cable winder connected with the ground controller, wherein the composite transmission cable is wound on the cable winder (a cable picking and laying machine), one end of the composite transmission cable is connected with the ultrasonic driving power supply, and the other end of the composite transmission cable is connected with the underground system through a cable bridle head after passing around the turning pulley. The downhole system comprises an ultrasonic transducer with a housing connected with the ultrasonic driving power supply through a composite transmission cable; ultrasonic transducer set up in the casing, just ultrasonic transducer is operable to be changed, ultrasonic transducer still with ground control appearance is connected.
The ground control instrument can control the work of the ultrasonic driving power supply and the ultrasonic transducer, and electric energy generated by the ultrasonic driving power supply is transmitted to the ultrasonic transducer through the composite transmission cable and is converted by the ultrasonic transducer to generate ultrasonic waves. The underground system further comprises a magnetic locator, the magnetic locator is further connected with the ground control instrument, after the magnetic locator reads a target position signal regularly, the signal is transmitted to the ground control instrument, the ground control instrument controls the cable winder to work to achieve the receiving and releasing of the composite transmission cable, and therefore the ultrasonic transducer can be transmitted to the target position.
The underground system further comprises a monitoring module, the monitoring module comprises a temperature sensor, a current sensor and a voltage sensor, and the temperature sensor, the current sensor and the voltage sensor are all connected with the ground control instrument and used for transmitting the temperature, the current and the voltage of the ultrasonic transducer to the ground control instrument.
According to some preferred embodiments, the composite transmission cable comprises an outer sheath, a steel wire armor layer, a coaxial signal cable and six power lines, wherein the steel wire armor layer is coated outside the outer sheath, and the coaxial signal cable and the power lines are concentrically twisted into a cable and are arranged in the outer sheath. The steel wire armor layer comprises an outer steel wire layer and an inner steel wire layer, and the two steel wire layers are spirally wound in the reverse direction. The coaxial signal cable sequentially comprises a conductor, a conductor insulating layer, a braided or obliquely-wrapped shielding layer and a sheath from inside to outside. The power line comprises an insulating layer and a copper wire stranded conductor arranged in the insulating layer.
The invention will be further illustrated by way of example, but the scope of protection is not limited to these examples.
Example 1
Selecting sandstone-type uranium ores (C3 mining areas) with relatively large uranium resource reserves and relatively low leaching rates, and selecting 2 groups of units (test units) in the C3 mining areas to perform a test (abbreviated as an ultrasonic well flushing test or an ultrasonic test) of ultrahigh-power ultrasonic blockage removal and infiltration increase.
In the embodiment, two adjacent groups of pumping units are selected, and each group of pumping units comprises 2 pumping holes and 7 injection holes, and 9 drilling holes (the pumping holes and the injection holes are collectively referred to as drilling holes in the invention) are provided in total, and the plane distribution of the 9 drilling holes is shown in fig. 1.
In this embodiment, from 12 and 10 days to 12 and 14 days in 2017, 3 ultrasonic transducers with different frequencies (from high to low) are used to generate ultrasonic waves so as to perform blockage-removing and infiltration-increasing operations on the 9 drill holes; the 3 ultrasonic transducers with different frequencies comprise a first ultrasonic transducer with the power of 18kW and the frequency of 25kHz, a second ultrasonic transducer with the power of 18kW and the frequency of 22kHz and a third ultrasonic transducer with the power of 18kW and the frequency of 18 kHz.
The blockage removal and infiltration increase operation of the embodiment is as follows: and (3) sending the ultrasonic transducers to the position of a filter of the in-situ leaching uranium mining drill hole by using a composite transmission cable, and respectively operating the ultrasonic transducers with the 3 different frequencies for 1 hour from the lowest end or the uppermost end of the filter until the well washing operation of the whole filter is completed.
In this embodiment, after all the operations of 9 drilling holes are completed, the operation is recovered in a centralized manner in 12 months and 15 days, the stable maximum pumping and injection flow is obtained, and then the flow is recovered to the similar flow before the test, and sampling analysis is performed on the related monitoring pumping holes. Tables 1 and 2 are statistics tables of the injection amount of 7 injection holes and the liquid extraction amount change data of 2 liquid extraction holes before and after the ultra-high power ultrasonic deblocking and infiltration increasing operation. Comparing the flow changes of the drill holes before and after the blockage removal and infiltration increase operation in the table 1 and the table 2, the stable maximum flow of 7 liquid injection holes is improved by 74-343 percent under the influence of ultra-high power ultrasonic waves, the stable maximum flow is improved by 162 percent on average, and the injection increase effect is obvious; the stable maximum flow of the 2 liquid pumping holes is improved by 7.4-22%, and the stable maximum flow is improved by 14% on average, which shows that the ultrahigh-power ultrasonic waves also have the effects of plugging removal and permeability increase on the stratum around the drill hole.
Example 2
On the basis of example 1, sampling analysis was performed on 2 liquid extraction holes (KC2306 and KC2704) and the peripheral monitoring holes in example 1 for more than twenty days, and specifically, after the plugging and infiltration increasing operation is performed by using the ultra-high power ultrasonic wave, the metal concentration change (shown in table 3) and the residual acid concentration change (shown in table 4) of the leachate during the pumping operation of the 2 liquid extraction holes and the peripheral monitoring holes in example 1 were analyzed.
It can be known from tables 3 and 4 that data fluctuation is large in a short time after the recovery of the pumping operation of the two pumping holes KC2306 and KC2704, and the analysis is that the pumping operation is not continuously performed during the ultra-high power ultrasonic blockage removal and infiltration increasing period, the communication performance among different pumping holes is different, the diffusion degree of the residual acid in different directions of the ore bed is different, and the data fluctuation is large in a period of time after the recovery. After the pumping and injection operation is continuously carried out for several days, the change of each analysis data is small and is close to that of each analysis data of a single hole before the blockage removal and seepage enhancement operation, and the fact that the underground water migration state is restored to the original hydraulic communication state due to the continuous operation of the test unit and each peripheral pumping and injection hole does not damage the original ore bed seepage state is shown. The concentration of the ultra-high power ultrasonic blockage removal and seepage increase well flushing operation is not reduced under the condition of improving the single-hole yield.
Comparative example 1
Selecting 1 group of units (test units) consisting of a KC2708 liquid extraction hole and KZ2508, KZ2510, KZ2910 and KZ2908 liquid injection holes in a C3 mining area, and performing ultrahigh-power ultrasonic wave blockage and seepage removal on the test units in 2018 from 1 month 10 to 1 month 14 in a manner basically the same as that in example 1, wherein the difference is that: the power of the first ultrasonic transducer, the power of the second ultrasonic transducer and the power of the third ultrasonic transducer are all 3 kW.
In the comparative example, when the operation of the KC2708 fluid pumping hole is completed and the operation is resumed on day 1, month and 15, the variation of the fluid pumping flow rate of the KC2708 fluid pumping hole after the operation is resumed is shown in table 5.
Comparative example 2
Selecting 1 group of units (test units) consisting of a KC3104 liquid extraction hole and KZ2906, KZ3306, KZ3304 and KZ2904 liquid injection holes in a C3 mining area, and carrying out ultrahigh-power ultrasonic blockage and seepage-increasing operation on the test units in 2018 from 1 month 10 to 1 month 14 in a manner basically the same as that in example 1, wherein the difference is that: and (3) sending the ultrasonic transducer to the middle position in the filter of the in-situ leaching uranium mining drill hole by using a composite transmission cable, and respectively operating the ultrasonic transducers with 3 different frequencies for 1 hour at the middle position.
In the comparative example, when the operation of the KC3104 drainage hole is completed and the operation is resumed on day 15/1, the change of the drainage flow rate of the KC3104 drainage hole after the resumption of the operation is shown in table 5.
Comparative example 3
Selecting 1 group of units (test units) consisting of KC2302 liquid extraction holes and KZ2102, KZ2104, KZ2504 and KZ2502 liquid injection holes in a C3 mining area, and performing well washing operation on the test units in 2018 by adopting a chemical well washing mode from 1 month 10 to 1 month 14.
In the comparative example, when the operation of the KC2302 fluid extraction hole is finished and the operation is resumed on 15 days 1 month, the change of the fluid extraction flow rate of the KC2302 fluid extraction hole after the resumption of the operation is shown in Table 5. The change of the metal concentration of the leachate and the change of the residual acid concentration of the leachate in the pumping operation of the KC2302 liquid pumping hole in the comparative example are shown in Table 6.
Table 1: and (4) a liquid injection flow change condition statistical table of the liquid injection hole in the ultrasonic well flushing test.
Table 2: and (4) a statistical table of the pumping liquid flow change condition of the pumping hole in the ultrasonic well-flushing test.
Note: KC2306 and KC2704 are recovered at about 16:30 at 12 month and 15 days in 2017, wherein KC2704 fails to operate at about 18:00 and recovers at 16 afternoon at 12 month and 16 days in 2017.
Table 3: and (4) a statistical table of the metal concentration change conditions of the leachate of the test holes and the monitoring holes around the test holes before and after the ultrasonic well-flushing test.
Table 4: and (4) a statistical table of the change conditions of the residual acid concentration of the leachate of the test holes and the monitoring holes around the test holes before and after the ultrasonic well-flushing test.
| Number of holes | Beginning of 12 |
12/10 | 12/15 | 12/16 | 12/17 | 12/18 | 12/20 | 12/24 | 12/30 | 18/1/3 |
| KC2306 | 5.17 | / | / | 5.45 | 5.08 | 5.03 | 5.40 | 5.40 | 5.87 | 5.85 |
| KC2704 | 5.96 | / | / | 6.00 | 5.82 | 5.77 | 5.91 | 5.91 | 5.82 | 6.28 |
| KC1904 | 6.19 | 6.37 | 6.14 | 5.96 | 6.47 | 6.47 | 6.14 | 6.05 | 5.96 | 5.91 |
| KC1906 | 5.73 | 5.91 | 6.00 | 5.82 | 6.19 | 5.82 | 6.14 | 5.96 | 5.97 | 5.96 |
| KC1908 | 5.77 | 5.77 | 5.91 | 5.63 | 5.73 | 5.73 | 6.00 | 5.82 | 6.05 | 6.00 |
| KC2302 | 4.90 | 4.80 | 5.17 | 5.08 | 5.19 | 4.90 | 5.36 | 5.22 | 5.17 | 5.17 |
| KC2304 | 5.54 | 4.94 | 6.10 | 5.91 | 5.54 | 5.73 | 5.82 | 5.77 | 5.73 | 5.82 |
| KC2308 | 5.82 | 6.79 | 6.33 | 4.43 | 6.00 | 6.00 | 6.19 | 6.24 | 6.05 | 6.19 |
| KC2702 | 4.39 | 4.34 | 4.39 | 5.73 | 4.25 | 4.20 | 4.35 | 4.48 | 4.34 | 4.53 |
| KC2706 | 5.59 | 5.63 | 5.87 | 6.47 | 5.73 | 5.63 | 6.52 | 5.82 | 5.82 | 5.82 |
| KC2708 | 6.37 | 6.74 | 6.65 | 6.10 | 5.82 | 6.65 | 6.54 | 5.75 | 6.47 | 6.35 |
| KC3102 | 5.40 | 6.14 | 6.24 | 6.00 | 5.82 | 6.24 | 6.19 | 6.34 | 6.42 | 6.00 |
| KC3104 | 5.77 | 5.73 | 5.82 | 5.77 | 5.50 | 5.96 | 5.82 | 5.59 | 5.96 | 6.00 |
| KC3106 | 6.10 | 6.37 | 6.42 | 6.28 | 4.94 | 6.51 | 6.65 | 6.45 | 6.56 | 6.56 |
From the results of tables 1 to 6, it can be seen that: the method has obvious blockage removal and seepage enhancement effects on the drill hole for the in-situ leaching uranium mining operation and the uranium reservoir layer in a certain range nearby the drill hole, improves the permeability and the connectivity of the stratum of the in-situ leaching mine to a certain extent, and can simultaneously improve the yield of the liquid injection hole and the liquid extraction hole. The concentration of the leaching solution is not changed while the liquid injection amount and the liquid pumping amount are increased, and the fact that the actual extraction amount of uranium is obviously increased under the action of the ultra-high power ultrasonic wave is proved.
Specifically, the following are mentioned: in tables 1 to 6: KZ represents a liquid injection hole; KC denotes the liquid extraction well.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (5)
1. A method for removing blockage and increasing permeability by using ultra-high power ultrasonic waves is characterized by comprising the following steps:
(1) determining a plurality of target positions uniformly spaced in the height direction of a filter of an in-situ leaching uranium mining drill hole; the target positions take the uppermost end or the lowermost end of the filter as starting positions;
(2) more than two ultrasonic transducers with different frequencies are adopted for each target position to generate ultrasonic waves, so that blockage removal and infiltration increasing operations are carried out for 60-100 min respectively;
the power of the ultrasonic transducer is 5-30 kW;
in the step (2), from the initial position, sequentially carrying out blockage removal and infiltration enhancement operation on each target position along the height direction of the filter; the distance between two adjacent target positions is 0.8-1.2 m;
in the step (2), ultrasonic wave is generated by adopting three ultrasonic wave transducers with different frequencies to perform blockage removal and infiltration enhancement operation on each target position according to a frequency decreasing mode;
the three ultrasonic transducers with different frequencies comprise a first ultrasonic transducer, a second ultrasonic transducer and a third ultrasonic transducer;
the frequency of the first ultrasonic transducer is 25-40 kHz, the frequency of the second ultrasonic transducer is 22-28 kHz, and the frequency of the third ultrasonic transducer is 18-22 kHz.
2. The method of claim 1, wherein:
the power of the ultrasonic transducer is 15-25 kW.
3. The method of claim 1, wherein:
in step (1), each of the target positions is determined by a magnetic locator.
4. The method of claim 1, wherein:
in the step (2), the ultrasonic transducer is sent to the target position through a composite transmission cable, electric energy generated by an ultrasonic driving power supply is transmitted to the ultrasonic transducer through the composite transmission cable, and ultrasonic waves are generated through conversion of the ultrasonic transducer to perform blockage removal and infiltration increasing operation.
5. The method of claim 4, wherein:
the power of the ultrasonic driving power supply is 20-100 kW.
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| CN111878049A (en) * | 2020-07-30 | 2020-11-03 | 核工业北京化工冶金研究院 | High-power ultrasonic blockage removal and infiltration increase device and method for in-situ leaching uranium mine |
| CN112483026A (en) * | 2020-11-06 | 2021-03-12 | 核工业北京化工冶金研究院 | Mechanical and chemical combined well flushing method for ground-leaching U-shaped horizontal well |
| CN113236217A (en) * | 2021-05-31 | 2021-08-10 | 中煤科工集团沈阳研究院有限公司 | Device and method for permeability increasing of low-permeability coal seam by using high-power ultrasonic waves |
| CN116177637A (en) * | 2023-02-20 | 2023-05-30 | 长安大学 | Repairing system and method for ultrasonic-assisted reinforced underground water circulating well |
| CN116575899B (en) * | 2023-05-15 | 2024-07-12 | 江西理工大学 | Ultrasonic guided wave permeability increasing method and system for ion type rare earth in-situ leaching |
| CN116591145B (en) * | 2023-05-15 | 2024-08-30 | 江西理工大学 | Ultrasonic guided wave permeability increasing method and system for tailing dam |
| CN116717217B (en) * | 2023-08-04 | 2023-11-21 | 东北石油大学三亚海洋油气研究院 | Ultrasonic blockage removing device and method for shaft hydrate under intervention operation |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1623040A (en) * | 2002-03-11 | 2005-06-01 | 吉诺维·德米特利耶维奇·哈米涅茨 | Method for operating a well jet device during ultrasonic cleaning of the downhole area of a productive formation and device for carrying out said method |
| US20060180386A1 (en) * | 2005-02-16 | 2006-08-17 | Birchak James R | Acoustic stimulation tool with axial driver actuating moment arms on tines |
| CN106761634A (en) * | 2017-01-25 | 2017-05-31 | 汪必启 | A kind of displacement of reservoir oil of environmental protection and energy saving convection current ultrasonic steam, ultrasound oil pumping dual-purpose apparatus |
| CN106947877A (en) * | 2016-12-27 | 2017-07-14 | 核工业北京化工冶金研究院 | A kind of method that utilization ultrasonic wave improves ground-dipping uranium extraction leaching rate |
| CN107676127A (en) * | 2017-10-20 | 2018-02-09 | 四川大学 | Variant-frequency vibration permeability-increasing gas pumping method and device in hole |
-
2018
- 2018-07-20 CN CN201810809145.4A patent/CN108952630B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1623040A (en) * | 2002-03-11 | 2005-06-01 | 吉诺维·德米特利耶维奇·哈米涅茨 | Method for operating a well jet device during ultrasonic cleaning of the downhole area of a productive formation and device for carrying out said method |
| US20060180386A1 (en) * | 2005-02-16 | 2006-08-17 | Birchak James R | Acoustic stimulation tool with axial driver actuating moment arms on tines |
| CN106947877A (en) * | 2016-12-27 | 2017-07-14 | 核工业北京化工冶金研究院 | A kind of method that utilization ultrasonic wave improves ground-dipping uranium extraction leaching rate |
| CN106761634A (en) * | 2017-01-25 | 2017-05-31 | 汪必启 | A kind of displacement of reservoir oil of environmental protection and energy saving convection current ultrasonic steam, ultrasound oil pumping dual-purpose apparatus |
| CN107676127A (en) * | 2017-10-20 | 2018-02-09 | 四川大学 | Variant-frequency vibration permeability-increasing gas pumping method and device in hole |
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