CN111379541A - Acid method underground leaching mountain land layer blockage removing method - Google Patents
Acid method underground leaching mountain land layer blockage removing method Download PDFInfo
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- CN111379541A CN111379541A CN201811619346.4A CN201811619346A CN111379541A CN 111379541 A CN111379541 A CN 111379541A CN 201811619346 A CN201811619346 A CN 201811619346A CN 111379541 A CN111379541 A CN 111379541A
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- blocking remover
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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
- E21B37/06—Methods or apparatus for cleaning boreholes or wells using chemical means for preventing, limiting or eliminating the deposition of paraffins or like substances
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
- C09K8/528—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning inorganic depositions, e.g. sulfates or carbonates
Abstract
The invention belongs to the technical field of in-situ leaching uranium mining, and provides a method for removing blockage of an acid-method in-situ leaching mountain stratum aiming at severe chemical blockage of the ore stratum in the acid-method leaching process. The method comprises the steps of injecting a first-stage blocking remover (containing 30-40% of industrial hydrochloric acid solution, 1-2% of corrosion inhibitor, 3-10% of industrial HF solution and 1-2% of iron stabilizer), a second-stage blocking remover (containing 15-20% of industrial polyhydrous acid solution, 1-2% of corrosion inhibitor and 1-2% of iron stabilizer) and an anti-swelling displacement fluid prepared from a surfactant and clear water into a wellhead in sequence to dissolve chemical blockage. The method has the beneficial effects that: the chemical blockage near the filter, the near-wellbore area and the deep part of the stratum can be relieved, the leaching channels near the ore bed and the filter are recovered, the stratum permeability is recovered, the production capacity of acid-method in-situ leaching drilling is improved, and economic exploitation of uranium resources is realized. All the preparation of the blocking remover is completed in the transfer tank, the blocking remover automatically flows to the blocking remover preparation tank by utilizing the height difference, and the preparation process can be completed by only 2 persons.
Description
Technical Field
The invention belongs to the technical field of in-situ leaching uranium mining, and particularly relates to a blockage removing method for an acid-method in-situ leaching mountain land layer.
Background
In-situ leaching uranium mining, the process bore is the only path for mining underground ore bodies, and its main function is leaching agent dispersion or leaching solution collection. The production efficiency of mining by the ground leaching method is largely related to the state of the drill hole of the ground leaching process. In the ground leaching production process, due to the complex underground leaching environment, no matter what leaching process is adopted, physical or chemical blockage occurs to different degrees around the drill hole or the filter. In the process of conveying and transporting the leaching agent, part of silt and other impurities enter the drilled hole along with the leaching agent and are precipitated at the bottom of the injection drilled hole. In the process that the leachate is transported from the liquid injection drilling hole to the liquid extraction drilling hole, the rock ore and the leachate are subjected to chemical reaction, and Ca2+、Fe3+、Fe2+、Mg2+When the acidity of the leaching solution is reduced to a certain degree, the easily precipitated ions are precipitated in the mineral-containing aquifer, part of precipitates are transported to a liquid-pumping drill hole along with the leaching solution and are deposited in the drill hole, and simultaneously, part of fine gravel is carried to be deposited together, so that the production state of the drill hole is influenced, the production capacity of the drill hole is gradually reduced, even channeling and other phenomena occur in the mineral layer, and the production capacity of the ground-immersed mine is seriously influenced. For example, when the 512 deposit I and II gyre ore body mining areas are leached by an acid method, serious chemical blockage is generated, and in order to remove the chemical blockage of an ore bed, a certain factory adopts various leaching process researches such as neutral, microorganism and low-acid oxygen oxidation leaching, but the effect is not ideal. In the aspect of well washing, an air compressor well washing, a piston well washing, a nitric acid chemical well washing and the like are adopted in sequence, and the well washing effect is poor. Therefore, in order to improve the production capacity of acid-method in-situ leaching drilling, a method for deblocking the ore-leaching mountain land layer by an acid method is needed, the leaching liquid amount and the uranium concentration are improved, and the deblocking is carried out by using a chemical reagent aiming at the serious chemical blockage formed by the ore layer in the acid-method leaching process.
Disclosure of Invention
The invention aims to provide a blockage removing method for an acid-method ground leaching mountain stratum aiming at the problem of chemical blockage of the conventional drill hole.
The technical scheme of the invention is as follows:
a method for removing blockage of an acid-method ground leaching mountain land layer sequentially comprises the following steps:
s1, injecting a first-stage blocking remover
The first-stage blocking remover is configured in a configuration middle rotary groove and is injected into a wellhead, then the well is soaked for 0.5 to 3 hours, and the amount V of the first-stage blocking remover injected is calculated by the following formula:
V＝πr2×L×n
in the formula: r is the planned treatment radius, L is the length of the drilling filter, and n is the average porosity of the ore bed;
s2, injecting a second-stage blocking remover
And (3) configuring a second-stage blocking remover in the configuration transfer tank and injecting the second-stage blocking remover into the wellhead to enlarge the reaction area, wherein the amount of the second-stage blocking remover injected is the same as that of the first-stage blocking remover in S1:
s3, injecting an anti-swelling displacement liquid
In the configuration, the anti-swelling displacement fluid is configured in the configuration transfer tank and injected into a wellhead, so that the blocking remover can be further diffused, and meanwhile, the damage caused by clay minerals is prevented.
Further, the first-stage blocking remover comprises 30-40% of industrial hydrochloric acid solution, 1-2% of corrosion inhibitor, 3-10% of industrial HF solution, 1-2% of iron stabilizer and the balance of water by mass fraction.
Further, the corrosion inhibitor is a resin amine derivative or mercaptan.
Further, the second-stage blocking remover comprises 15-20% of industrial polyhydrogen acid solution, 1-2% of corrosion inhibitor, 1-2% of iron stabilizer and the balance of water.
Further, the anti-swelling displacement liquid is prepared from a surfactant and clear water, and the mass fraction of the surfactant is 0.02-0.1%.
Further, before the first-stage blocking remover is injected in the S1 step, 3m3 clear water is injected into the drill hole to test the pressure, and whether the pipeline has leakage or not is discovered and timely treated.
Further, in the liquid injection process of the first-stage blocking remover, the second-stage blocking remover and the anti-expansion displacement liquid, the liquid injection pressure is not higher than 2.2MPa, and the liquid injection instantaneous amount is 3-4m3And h, the liquid injection process is continuously and uninterruptedly maintained.
The invention also provides a device for preparing the blocking remover for the acid-method ground leaching mountain land layer, which comprises a hydrochloric acid storage tank, a preparation transfer tank, a preparation tank and a liquid injection pump; the preparation transfer groove is positioned in the outlet direction of the hydrochloric acid storage tank and is lower than the liquid outlet of the hydrochloric acid storage tank, the industrial HCl solution in the hydrochloric acid storage tank automatically flows into the preparation transfer groove by utilizing the height difference, and a stop valve is arranged at the outlet of the hydrochloric acid storage tank; the tank top of the preparation tank is lower than the liquid outlet of the preparation transfer tank, and the liquid outlet of the preparation transfer tank is provided with a ball valve; the liquid outlet of the preparation tank is connected with an acid-resistant liquid injection pump; all parts are connected through PE pipes.
The invention also provides a blocking remover for the acid leaching mountain land layer, which comprises 30-40% of industrial hydrochloric acid solution, 1-2% of corrosion inhibitor, 3-10% of industrial HF solution, 1-2% of iron stabilizer and the balance of water.
The blocking remover comprises 15-20% of industrial polyhydrogen acid solution, 1-2% of corrosion inhibitor, 1-2% of iron stabilizer and the balance of water.
The invention has the beneficial effects that:
the invention aims at the serious chemical blockage formed by the mineral layer in the acid leaching process and utilizes a chemical reagent to remove the blockage. The blockage removing method can remove the chemical blockage near the filter, near the well zone and deep part of the stratum, restore the leaching channels near the ore bed and the filter, recover the permeability of the stratum, improve the production capacity of acid-method in-situ leaching holes and realize the economic exploitation of uranium resources. The preparation of all the blocking remover is completed in the transfer tank, the blocking remover automatically flows to the blocking remover preparation tank by utilizing the height difference, the preparation process can be completed by only 2 persons, and other machines and personnel are not required to be matched.
Drawings
FIG. 1 is a schematic structural diagram of a deblocking agent dispensing device according to the present invention;
in the figure: 1-hydrochloric acid storage tank, 2-preparation transfer tank, 3-preparation tank, 4-liquid injection pump, 5-stop valve, 6-ball valve, 7-PE pipe and 8-well head.
Detailed Description
The invention is further described in detail with reference to the drawings and the specific embodiments by taking 512 ore deposits I and II to be turned back to the mining area of the ore body as an example.
The embodiment provides a blockage removing method for an acid-method ground leaching mountain land layer, which is used for removing chemical blockage near a filter, a near-wellbore zone and the deep part of a stratum, normalizing leaching channels near a mine layer and the filter, recovering the permeability of the stratum and realizing economic exploitation of uranium resources. The method sequentially comprises the following steps:
s1, building a blocking remover configuration device
S1.1, preparing parts required by a deblocking agent preparation device, wherein the composition of the deblocking agent preparation device is shown in figure 1, and the main components of the deblocking agent preparation device comprise: 1 hydrochloric acid storage tank 1 with volume of 70m3650m of 63 × 10mm PE liquid injection pipeline, 3 deblocking agent preparation tanks 3 with the volume of 6m3A/one; 2 acid-proof liquid injection pumps 4(1 is a standby device) with maximum discharge capacity of 6.5m3H, the maximum working pressure is 3 MPa; 2 unblocking orifice devices (one set of pumping/injection hole); 1 blocking remover prepared transfer tank 2, the volume of which is 2m3；
S1.2, placing a preparation transfer tank 2 in the outlet direction of an HCl storage tank 1, wherein the position of the preparation transfer tank 2 is about 1m lower than the liquid outlet of the HCl storage tank 1, enabling the industrial HCl solution in the HCl storage tank 1 to automatically flow into the preparation transfer tank 2 by utilizing the height difference, and arranging a DN50 stop valve 5 at the outlet of the HCl storage tank 1 for controlling the liquid flow on-off of the industrial HCl solution; the preparation tank 3 and the metering pump are placed at a lower part of the terrain, the tank top of the preparation tank 3 is about 7.5m lower than the liquid outlet of the preparation transfer tank 2, and the liquid outlet of the preparation transfer tank 2 is provided with a PVC ball valve 6 for controlling the on-off of liquid flow; a stop valve is arranged at a liquid outlet of the preparation tank 3 to control the on-off of liquid flow, and then the preparation tank is connected with 1 acid-resistant liquid injection pump 4 through a PE pipe 7 and used for pumping the prepared blocking remover into a wellhead 8 and controlling the flow rate and the flow of the liquid flow; all the components are connected through PE pipes 7;
s2, preparation before injection of blocking remover
S2.1, lowering the pipeline connected with the liquid injection pump 4 to the position near the drilling filter to ensure the sealing of the hole opening of the drill hole;
s2.2 injecting 3m into the drill hole3Testing the pressure of clean water, observing the pressure and the pipeline condition in the water injection process, and timely treating leakage;
s3, injecting a first-stage blocking remover
S3.1 preparation of first-stage blocking remover
A first-stage blocking remover is configured in the transfer tank 2, wherein the first-stage blocking remover comprises 30-40% of industrial hydrochloric acid solution, 1-2% of corrosion inhibitor, 3-10% of industrial HF solution, 1-2% of iron stabilizer and the balance of water; the corrosion inhibitor has the function of preventing the stainless steel from being corroded by the blocking remover, and a resin amine derivative or mercaptan is commonly used as the corrosion inhibitor; the iron stabilizer is mainly used for preventing Fe3+Precipitating by using a common iron stabilizer purchased in the market; the first-stage blocking remover adopted in the embodiment
S3.2, injecting the blocking remover prepared in the S3.1 in the first stage into the wellhead 8, then soaking for 0.5-3 hours, and calculating the amount V of the injected blocking remover by the following formula:
V＝πr2×L×n
in the formula: r is the planned treatment radius, L is the length of the drilling filter, and n is the average porosity of the ore bed; the average porosity n of the mineral layer can be obtained through the formation parameter measurement result recorded in the geological report, and in the embodiment, the average porosity n of the mineral layer is approximately equal to 26 percent; the diffusion radius r at the stage is generally 1.4-1.8m, which is obtained through experiments;
s4, injecting a second-stage blocking remover
S4.1 preparation of second-stage blocking remover
A first-stage blocking remover is configured in the transfer tank 2, and the second-stage blocking remover comprises 15-20% of industrial polyhydrogen acid solution, 1-2% of corrosion inhibitor, 1-2% of iron stabilizer and the balance of water;
s4.2, injecting a second-stage blocking remover prepared in the S4.1 manner into the wellhead 8 to enlarge the reaction area, wherein the diffusion radius r of the stage is generally 0.8-1m deep part through experiments; the amount V of the blocking remover injected is the same as S3.2;
s5, injecting an anti-swelling displacement liquid
S5.1 preparing anti-swelling displacement liquid
Preparing an anti-swelling displacement liquid in the transfer tank 2, wherein the anti-swelling displacement liquid is prepared from a surfactant and clear water, and the mass fraction of the surfactant is 0.02-0.1%; this example uses 6kg of surfactant with 3m3The anti-swelling displacement liquid prepared from the clear water can generally push the blocking remover to the deep part by 0.5-0.8 m. The usage amount of the anti-swelling displacement liquid can be 2-15m according to different situations3。
S5.2, the anti-swelling displacement liquid prepared in the S5.1 is injected into the wellhead 8, so that the blocking remover can be diffused farther, and meanwhile, the damage caused by clay minerals is prevented.
Under the conditions of the existing equipment and pipelines, the pressure of the injection liquid in the whole injection process is not higher than 2.2MPa, and the instantaneous injection liquid amount is 3-4m3And h, the liquid injection process is continuously and uninterruptedly maintained.
By the chemical blockage removing process, 37 blockage removing drill holes are formed in 2017, the water quantity of a single hole is averagely increased by 1.4m3/h and increased from 0.44m3/h to 1.88m3/h, the problem of small liquid pumping and injection quantity of a mining area is solved, and a good effect is achieved.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. It is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.
Claims (10)
1. A method for unblocking a mountain land layer in an acid leaching process is characterized by sequentially comprising the following steps:
s1, injecting a first-stage blocking remover
A first-stage blocking remover is configured in a configuration transfer tank (2) and injected into a wellhead (8), then the well is soaked for 0.5 to 3 hours, and the amount V of the first-stage blocking remover injected is calculated by the following formula:
V＝πr2×L×n
in the formula: r is the planned treatment radius, L is the length of the drilling filter, and n is the average porosity of the ore bed;
s2, injecting a second-stage blocking remover
And (3) configuring a second-stage blocking remover in the configuration transfer tank (2) and injecting the second-stage blocking remover into a wellhead (8) to enlarge the reaction area, wherein the amount of the second-stage blocking remover injected is the same as that of the first-stage blocking remover in S1:
s3, injecting an anti-swelling displacement liquid
The anti-swelling displacement liquid is configured in the configuration transfer tank (2) and is injected into a well head (8), so that the blocking remover can be further diffused, and the damage caused by clay minerals is prevented.
2. The method for unblocking the mountain land layer by acid leaching according to claim 1, wherein: the first-stage blocking remover comprises 30-40% of industrial hydrochloric acid solution, 1-2% of corrosion inhibitor, 3-10% of industrial HF solution, 1-2% of iron stabilizer and the balance of water.
3. The method for unblocking the mountain land layer by acid leaching according to claim 2, wherein: the corrosion inhibitor is a resin amine derivative or mercaptan.
4. The method for unblocking the mountain land layer by acid leaching according to claim 2, wherein: the second-stage blocking remover comprises 15-20% of industrial polyhydrogen acid solution, 1-2% of corrosion inhibitor, 1-2% of iron stabilizer and the balance of water.
5. The method for unblocking the mountain land layer by acid leaching according to claim 2 or 4, wherein: the anti-swelling displacement liquid is prepared from a surfactant and clear water, and the mass fraction of the surfactant is 0.02-0.1%.
6. The method for unblocking the mountain land layer by acid leaching according to claim 5, wherein: before the S1 injection of the first-stage blocking remover, 3m of blocking remover is injected into the drill hole3And testing the pressure by using clean water, and finding whether the pipeline has leakage or not in time and processing the leakage in time.
7. As claimed inSolving 6 the blockage relieving method for the acid method ground leaching mountain land layer is characterized in that: in the liquid injection process of the first-stage blocking remover, the second-stage blocking remover and the anti-swelling displacement liquid, the liquid injection pressure is not higher than 2.2MPa, and the liquid injection instantaneous amount is 3-4m3And h, the liquid injection process is continuously and uninterruptedly maintained.
8. A blocking remover preparation device for the blocking removing method of the acid leaching mountain land layer according to claim 1, which is characterized in that: comprises a hydrochloric acid storage tank (1), a preparation transfer tank (2), a preparation tank (3) and a liquid injection pump (4); the preparation transfer tank (2) is positioned in the outlet direction of the hydrochloric acid storage tank (1) and is lower than the liquid outlet of the hydrochloric acid storage tank (1), the industrial HCl solution in the hydrochloric acid storage tank (1) automatically flows into the preparation transfer tank (2) by utilizing the height difference, and a stop valve (5) is arranged at the outlet of the hydrochloric acid storage tank (1); the tank top of the preparation tank (3) is lower than the liquid outlet of the preparation transfer tank (2), and the liquid outlet of the preparation transfer tank (2) is provided with a ball valve (6); the liquid outlet of the preparation tank (3) is connected with an acid-resistant liquid injection pump (4); all the parts are connected through PE pipes (7).
9. A blocking remover for the blocking removing method of the acid leaching mountain land layer according to claim 1, characterized in that: the blocking remover comprises 30-40% of industrial hydrochloric acid solution, 1-2% of corrosion inhibitor, 3-10% of industrial HF solution, 1-2% of iron stabilizer and the balance of water.
10. A blocking remover for the blocking removing method of the acid leaching mountain land layer according to claim 1, characterized in that: the blocking remover comprises 15-20% of industrial polyhydrogen acid solution, 1-2% of corrosion inhibitor, 1-2% of iron stabilizer and the balance of water.
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| CN201811619346.4A CN111379541A (en) | 2018-12-28 | 2018-12-28 | Acid method underground leaching mountain land layer blockage removing method |
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| CN201811619346.4A CN111379541A (en) | 2018-12-28 | 2018-12-28 | Acid method underground leaching mountain land layer blockage removing method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110331281A (en) * | 2019-07-10 | 2019-10-15 | 核工业北京化工冶金研究院 | A kind of in-situ acid uranium leaching list exploiting field independence acidization tool |
| CN112780222A (en) * | 2021-03-05 | 2021-05-11 | 西南石油大学 | Device and method for automatically controlling sectional filling of plugging material |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6218342B1 (en) * | 1996-08-02 | 2001-04-17 | M-I Llc | Oil-based drilling fluid |
| AU2007211354A1 (en) * | 2006-01-31 | 2007-08-09 | Bp Exploration Operating Company Limited | Wellbore fluid comprising a base fluid and a particulate bridging agent |
| CN102010700A (en) * | 2010-08-12 | 2011-04-13 | 天津市天诚化工有限公司 | High-efficiency inorganic blockage relieving agent |
| CN206418985U (en) * | 2016-12-30 | 2017-08-18 | 新疆中核天山铀业有限公司 | A kind of new ground-dipping uranium extraction drilling physical cleaning device |
| CN108590587A (en) * | 2018-04-24 | 2018-09-28 | 长春市华泰石油科技开发有限公司 | Combined integratedization water injection well de-plugging process method |
| CN108865093A (en) * | 2018-05-23 | 2018-11-23 | 克拉玛依市红都有限责任公司 | Uranium mine anatonosis blockages relieving fluid and its application method and application |
-
2018
- 2018-12-28 CN CN201811619346.4A patent/CN111379541A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6218342B1 (en) * | 1996-08-02 | 2001-04-17 | M-I Llc | Oil-based drilling fluid |
| AU2007211354A1 (en) * | 2006-01-31 | 2007-08-09 | Bp Exploration Operating Company Limited | Wellbore fluid comprising a base fluid and a particulate bridging agent |
| CN102010700A (en) * | 2010-08-12 | 2011-04-13 | 天津市天诚化工有限公司 | High-efficiency inorganic blockage relieving agent |
| CN206418985U (en) * | 2016-12-30 | 2017-08-18 | 新疆中核天山铀业有限公司 | A kind of new ground-dipping uranium extraction drilling physical cleaning device |
| CN108590587A (en) * | 2018-04-24 | 2018-09-28 | 长春市华泰石油科技开发有限公司 | Combined integratedization water injection well de-plugging process method |
| CN108865093A (en) * | 2018-05-23 | 2018-11-23 | 克拉玛依市红都有限责任公司 | Uranium mine anatonosis blockages relieving fluid and its application method and application |
Non-Patent Citations (1)
| Title |
|---|
| 吉宏斌 等: "《新疆某铀矿床酸化解堵增渗技术研究及现场应用》", 《中国核科学技术进展报告（第五卷）》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110331281A (en) * | 2019-07-10 | 2019-10-15 | 核工业北京化工冶金研究院 | A kind of in-situ acid uranium leaching list exploiting field independence acidization tool |
| CN112780222A (en) * | 2021-03-05 | 2021-05-11 | 西南石油大学 | Device and method for automatically controlling sectional filling of plugging material |
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Application publication date: 20200707 |