CN102516962A - Hole sealing material of potassium-magnesium salt mine drilling holes and hole sealing method thereof - Google Patents
Hole sealing material of potassium-magnesium salt mine drilling holes and hole sealing method thereof Download PDFInfo
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- CN102516962A CN102516962A CN2011103794856A CN201110379485A CN102516962A CN 102516962 A CN102516962 A CN 102516962A CN 2011103794856 A CN2011103794856 A CN 2011103794856A CN 201110379485 A CN201110379485 A CN 201110379485A CN 102516962 A CN102516962 A CN 102516962A
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Abstract
The invention relates to a hole sealing material of potassium-magnesium salt mine drilling holes. The material is prepared by stirring and mixing the following raw materials in percentage by weight: 60-85% of drilling circulation liquid used by the potassium-magnesium salt mine drilling hole, 10-30% of aggregate, 5-20% of magnesium oxide, and 0.01-0.1% of water-repellent agent. The invention further provides a hole sealing method using the hole sealing material. The hole sealing material provided by the invention fully uses the wasted drilling circulation liquid, saves energy and is environment-friendly; the hole sealing material has a fast condensation speed, and has certain plasticity and expansion performance at the early period; the hole sealing material can be closely combined with a well wall, and can prevent the water from infiltrating to corrode the well wall; and the material has high later strength, and has excellent corrosion resistant performance of resisting halite and brine.
Description
Technical field
The present invention relates to salt mine exploration engineering field, relate in particular to a kind of sealing material and method for sealing thereof of kalium-magnesium deposit boring.
Background technology
Domestic in the past in the salt mine geological prospecting; Drilling and sealing is not too paid attention to; Because most of is the liquid mineral deposit with the lyotropic salt mineral deposit, though solution mining is all adopted in some solid lyotropic salt mineral deposit; Little to mine and mine safety influence, so when Repone K, sodium-chlor cover hole sealing of hole, all adopt the grout sealing of hole.Traditional salt mine shut-in well method; Because what sealing of hole adopted is ordinary Portland cement; But contain a large amount of cl ions rock salt ordinary Portland cement is had the intensive corrosive nature, adopting at Yi Jing is main recovery of subterranean lyotropic salt mineral deposit, particularly has great risk during the kalium-magnesium deposit bed; The drilling and sealing success or failure are related to the personal safety as well as the property safety in mining area, so the mode of the boring ordinary Portland cement sealing of hole of salt mine faces great challenge and risk.
China's solid kalium mine and is main with sylvite seldom, the very high solid kalium-magnesium deposit bed of content of magnesium chloride seldom, also not to the probing in this type of mineral deposit and the experience and the precedent of sealing of hole.The narrow strip of water of Laos and China is the friendly neighbouring country of China, is distributed with abundant solid potassium resource, and is main with the very high solid carnallite deposit of content of magnesium chloride; In Laos everything Plain, verified 2.92 hundred million tons of Repone K reserves, 133.6 hundred million tons of prediction Repone K prospective reservess, the carnallite deposit reserves are very huge.At present, the how tame large-lot producer of China has taken the exploration right or the mineral right of Laos's sylvite, and the exploitation of Laos's sylvite raises the curtain, and salt mine exploration is meanwhile also being carried out on a large scale.In exploration process, the exploration technology and the method for sealing in this type of mineral deposit has been placed on very important position to carnallite deposit.In exploration in order to guarantee sealing quality; Seldom adopt method now with the ordinary Portland cement sealing of hole; But do not have the method for sealing of more economical rationality, and generally adopt the method for clay ball and ordinary Portland cement and usefulness, adopt the mode sealing of hole of throwing clay ball in ore bed to rock salt section; Adopt the cement sealing of hole in the mud stone section, to prevent the corrosion of ore bed and halite layer to Portland cement.But in throwing in the clay ball process, because boring aperture is little, after clay ball was usually put up a bridge in the hole, clay ball can't be thrown at the bottom of the hole, has the not tight situation of sealing of hole.Therefore, the requirement of this kind method and technology is high, difficulty of construction is big, is difficult to guarantee sealing quality; In addition, in the exploration technology of magnesium chloride brine, in depleted drilling well circulation fluid as drilling fluid; Directly add ordinary Portland cement; The method of then mixture of drilling well circulation fluid and ordinary Portland cement being got in the hole with pump is carried out sealing of hole, and is though this method sealing of hole is more tight, the same with the result of the method sealing of hole of the silicate cement that directly adopts; Along with the corrosion of ordinary Portland cement in rock salt, sealing quality hidden danger can appear in boring.In the mining area of exploiting with the solids production mode, if in a large amount of surface water and the groundwater flow hand-hole, will direct threats mine safety, mine property and personnel safety.
Summary of the invention
Technical problem to be solved by this invention provides the sealing material of the kalium-magnesium deposit boring of a kind of anti-rock salt and bittern corrosive nature.
Another technical problem to be solved by this invention has provided the method for sealing that utilizes this sealing material.
For addressing the above problem; The sealing material of a kind of kalium-magnesium deposit boring of the present invention, it is characterized in that: this material is mixed by the raw material stirring of following weight ratio: kalium-magnesium deposit hole used drilling well circulation fluid 60～85%, aggregate 10～30%, Natural manganese dioxide 5～20%, water repellent agent 0.01～0.1%.
Said aggregate is meant any one in mud stone, rock salt, cream salt or the gravel of particle diameter φ≤10mm.
Said Natural manganese dioxide is the active oxidation magnesium dust.
Said water repellent agent is phosphoric acid or phosphoric acid salt.
Said kalium-magnesium deposit hole used drilling well circulation fluid by following weight than forming: water 50～70%, magnesium chloride 20～30%, Repone K 0.1～4%, sodium-chlor 0.1～3%, wilkinite 4～15% and CMC 99.5 0～1%.
Said wilkinite is meant that drilling mud uses wilkinite.
Said CMC 99.5 is meant Xylo-Mucine or sodium carboxymethyl-cellulose.
The method for sealing of the sealing material of aforesaid a kind of kalium-magnesium deposit boring may further comprise the steps:
(1) the kalium-magnesium deposit used drilling well circulation fluid of holing is driven in the mud steel basin with steam piano from suction pit;
(2) in being placed with the mud steel basin of said drilling well circulation fluid, adding successively to stir behind aggregate, Natural manganese dioxide and the water repellent agent and process sealing of hole mud;
(3) utilize the drilling well circulating pump system, said sealing of hole mud is delivered in the hole from lower to upper, sealing of hole mud overflows in the hole, promptly accomplishes sealing of hole.
The present invention compared with prior art has the following advantages:
1, owing among the present invention magnesite binding material is arranged; Therefore; Fast, early stage certain plasticity-and the expansion character of tool of sealing material rate of set can be combined closely with the borehole wall, can prevent to ooze the corrosion to the borehole wall under water; This material later strength high (can reach 30MPa) has the corrosive nature of extraordinary anti-rock salt and bittern simultaneously.
2, use wilkinite owing to contain drilling mud in the sealing material, so impermeability and water repelling property are good.
3, main raw material(s) of the present invention can solve on the spot, produce easy, cost is low, pollution-free.
4, sealing material of the present invention has made full use of depleted drilling well circulation fluid, energy-conserving and environment-protective.
Embodiment
The sealing material of 1 one kinds of kalium-magnesium deposits of embodiment boring, this material is mixed by the raw material stirring of following weight ratio: kalium-magnesium deposit hole used drilling well circulation fluid 2170kg, aggregate 1000kg, Natural manganese dioxide 450kg, water repellent agent 0.5kg.
Wherein: aggregate is meant the rock salt of particle diameter φ≤10mm; Natural manganese dioxide is the active oxidation magnesium dust; Water repellent agent is a phosphoric acid; Kalium-magnesium deposit the consisting of of used drilling well circulation fluid of holing: water 1519kg, magnesium chloride 471kg, Repone K 60kg, sodium-chlor 40kg, wilkinite 80kg.
The method for sealing of this sealing material may further comprise the steps:
(1) the kalium-magnesium deposit used drilling well circulation fluid of holing is driven in the mud steel basin with steam piano from suction pit.
(2) in being placed with the mud steel basin of drilling well circulation fluid, adding successively to stir behind aggregate, Natural manganese dioxide and the water repellent agent and process sealing of hole mud.
(3) utilize the drilling well circulating pump system, sealing of hole mud is delivered in the hole from lower to upper, sealing of hole mud overflows in the hole, promptly accomplishes sealing of hole.
The sealing material of 2 one kinds of kalium-magnesium deposits of embodiment boring, this material is mixed by the raw material stirring of following weight ratio: kalium-magnesium deposit hole used drilling well circulation fluid 2210kg, aggregate 800kg, Natural manganese dioxide 160kg, water repellent agent 3kg.
Wherein: aggregate is meant the cream salt of particle diameter φ≤10mm; Natural manganese dioxide is the active oxidation magnesium dust; Water repellent agent is a superphosphate of lime.
Kalium-magnesium deposit the consisting of of used drilling well circulation fluid of holing: water 1540kg, magnesium chloride 450kg, Repone K 35kg, sodium-chlor 25kg, wilkinite 160kg.
The method for sealing of this sealing material is with embodiment 1.
The sealing material of 3 one kinds of kalium-magnesium deposits of embodiment boring, this material is mixed by the raw material stirring of following weight ratio: kalium-magnesium deposit hole used drilling well circulation fluid 2040kg, aggregate 240kg, Natural manganese dioxide 120kg and water repellent agent 1kg.
Wherein: aggregate is meant the gravel of particle diameter φ≤10mm; Natural manganese dioxide is the active oxidation magnesium dust; Water repellent agent is a diammonium phosphate.
Kalium-magnesium deposit the consisting of of used drilling well circulation fluid of holing: water 1020kg, magnesium chloride 620kg, Repone K 80kg, sodium-chlor 50kg, wilkinite 300kg and CMC 99.5 10kg.
The method for sealing of this sealing material is with embodiment 1.
The sealing material of 4 one kinds of kalium-magnesium deposits of embodiment boring, this material is mixed by the raw material stirring of following weight ratio: kalium-magnesium deposit hole used drilling well circulation fluid 1710kg, aggregate 250kg, Natural manganese dioxide 500kg, water repellent agent 3kg.
Wherein: aggregate is meant the mud stone of particle diameter φ≤10mm; Natural manganese dioxide is the active oxidation magnesium dust; Water repellent agent is a diammonium phosphate.Kalium-magnesium deposit hole used drilling well circulation fluid by following weight than forming: water 1000kg, magnesium chloride 400kg, Repone K 60kg, sodium-chlor 40kg, wilkinite 200kg and CMC 99.5 10kg.
The method for sealing of this sealing material is with embodiment 1.
The sealing material of 5 one kinds of kalium-magnesium deposits of embodiment boring, this material is mixed by the raw material stirring of following weight ratio: kalium-magnesium deposit hole used drilling well circulation fluid 1610kg, aggregate 800kg, Natural manganese dioxide 250kg, water repellent agent 3kg.
Wherein: aggregate is meant the cream salt of particle diameter φ≤10mm; Natural manganese dioxide is the active oxidation magnesium dust; Water repellent agent is a phosphoric acid.
Kalium-magnesium deposit hole used drilling well circulation fluid by following weight than forming: water 1000kg, magnesium chloride 400kg, Repone K 60kg, sodium-chlor 40kg, wilkinite 100kg and CMC 99.5 10kg.
The method for sealing of this sealing material is with embodiment 1.
The sealing material of 6 one kinds of kalium-magnesium deposits of embodiment boring, this material is mixed by the raw material stirring of following weight ratio: kalium-magnesium deposit hole used drilling well circulation fluid 1840kg, aggregate 600kg, Natural manganese dioxide 200kg, water repellent agent 2kg.
Wherein: aggregate is meant the mud stone of particle diameter φ≤10mm; Natural manganese dioxide is the active oxidation magnesium dust; Water repellent agent is a monoammonium phosphate.
Kalium-magnesium deposit hole used drilling well circulation fluid by following weight than forming: water 1295kg, magnesium chloride 431kg, Repone K 2kg, sodium-chlor 2kg, wilkinite 100kg and CMC 99.5 10kg.
The method for sealing of this sealing material is with embodiment 1.
The sealing material of 7 one kinds of kalium-magnesium deposits of embodiment boring, this material is mixed by the raw material stirring of following weight ratio: kalium-magnesium deposit hole used drilling well circulation fluid 1840kg, aggregate 600kg, Natural manganese dioxide 200kg, water repellent agent 2kg.
Wherein: aggregate is meant the mud stone of particle diameter
; Natural manganese dioxide is the active oxidation magnesium dust; Water repellent agent is a monoammonium phosphate.
Kalium-magnesium deposit hole used drilling well circulation fluid by following weight than forming: water 1000kg, magnesium chloride 436kg, Repone K 55kg, sodium-chlor 55kg, wilkinite 276kg and CMC 99.5 18kg.
The method for sealing of this sealing material is with embodiment 1.
Wilkinite in the foregoing description 1～7 is meant that drilling mud uses wilkinite, and CMC 99.5 is meant Xylo-Mucine or sodium carboxymethyl-cellulose.
The hole preparation method of used drilling well circulation fluid of kalium-magnesium deposit may further comprise the steps:
(1) by weight taking by weighing raw material;
(2) in steel basin, add entry, and then add magnesium chloride, stirring is dissolved magnesium chloride fully;
(3) in steel basin, add Repone K, sodium-chlor successively, and stirring makes its dissolving;
(4) add at steel basin and promptly get after wilkinite and CMC 99.5 stir.
Claims (8)
1. the sealing material of kalium-magnesium deposit boring, it is characterized in that: this material is mixed by the raw material stirring of following weight ratio: kalium-magnesium deposit hole used drilling well circulation fluid 60～85%, aggregate 10～30%, Natural manganese dioxide 5～20%, water repellent agent 0.01～0.1%.
2. the sealing material of a kind of kalium-magnesium deposit boring as claimed in claim 1 is characterized in that: said aggregate is meant any one in mud stone, rock salt, cream salt or the gravel of particle diameter φ≤10mm.
3. the sealing material of a kind of kalium-magnesium deposit boring as claimed in claim 1, it is characterized in that: said Natural manganese dioxide is the active oxidation magnesium dust.
4. the sealing material of a kind of kalium-magnesium deposit boring as claimed in claim 1, it is characterized in that: said water repellent agent is phosphoric acid or phosphoric acid salt.
5. the sealing material of a kind of kalium-magnesium deposit boring as claimed in claim 1 is characterized in that: said kalium-magnesium deposit hole used drilling well circulation fluid by following weight than forming: water 50～70%, magnesium chloride 20～30%, Repone K 0.1～4%, sodium-chlor 0.1～3%, wilkinite 4～15% and CMC 99.5 0～1%.
6. the sealing material of a kind of kalium-magnesium deposit boring as claimed in claim 5 is characterized in that: said wilkinite is meant that drilling mud uses wilkinite.
7. the sealing material of a kind of kalium-magnesium deposit boring as claimed in claim 5, it is characterized in that: said CMC 99.5 is meant Xylo-Mucine or sodium carboxymethyl-cellulose.
8. the method for sealing of the sealing material of a kind of kalium-magnesium deposit boring as claimed in claim 1 may further comprise the steps:
(1) the kalium-magnesium deposit used drilling well circulation fluid of holing is driven in the mud steel basin with steam piano from suction pit;
(2) in being placed with the mud steel basin of said drilling well circulation fluid, adding successively to stir behind aggregate, Natural manganese dioxide and the water repellent agent and process sealing of hole mud;
(3) utilize the drilling well circulating pump system, said sealing of hole mud is delivered in the hole from lower to upper, sealing of hole mud overflows in the hole, promptly accomplishes sealing of hole.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011103794856A CN102516962A (en) | 2011-11-24 | 2011-11-24 | Hole sealing material of potassium-magnesium salt mine drilling holes and hole sealing method thereof |
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| CN2011103794856A CN102516962A (en) | 2011-11-24 | 2011-11-24 | Hole sealing material of potassium-magnesium salt mine drilling holes and hole sealing method thereof |
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| CN2011103794856A Pending CN102516962A (en) | 2011-11-24 | 2011-11-24 | Hole sealing material of potassium-magnesium salt mine drilling holes and hole sealing method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103696729A (en) * | 2013-12-30 | 2014-04-02 | 河北联合大学 | Method for sealing drilled hole for mine gas drainage |
| CN108516719A (en) * | 2018-06-01 | 2018-09-11 | 西南科技大学 | Concrete waterproofer, waterproofing agent preparation method and water-proof concrete |
| CN108956435A (en) * | 2018-06-12 | 2018-12-07 | 中国石油天然气股份有限公司 | Simulation experiment method and device for high-temperature high-pressure reservoir corrosion |
| CN111909672A (en) * | 2020-08-10 | 2020-11-10 | 山东达源环保工程有限公司 | Preparation method of carboxymethyl cellulose modified profile control water shutoff agent |
| CN111943633A (en) * | 2020-08-20 | 2020-11-17 | 黄卫东 | Magnesium oxychloride cement slurry for grouting in potash magnesium salt mine area and method for implementing drilling hole sealing and well and roadway construction water stop engineering |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5351759A (en) * | 1992-10-22 | 1994-10-04 | Shell Oil Company | Slag-cement displacement by direct fluid contact |
| WO2001093842A2 (en) * | 2000-06-06 | 2001-12-13 | Deepearth Solutions Limited | Composition for controlling wellbore fluid and gas invasion and method for using same |
| WO2003014520A1 (en) * | 2001-08-02 | 2003-02-20 | Schlumberger Canada Limited | Shear-sensitive plugging fluid for plugging and a method for plugging a subterranean formation zone |
| CN101451061A (en) * | 2008-12-30 | 2009-06-10 | 山东大学 | Sand consolidation and water plugging profile control agent made by oil sand |
| CN101775273A (en) * | 2009-01-09 | 2010-07-14 | 中国石油化工股份有限公司 | High-temperature resistance base fluid for well cementing of oil gas well, preparation method and application thereof |
-
2011
- 2011-11-24 CN CN2011103794856A patent/CN102516962A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5351759A (en) * | 1992-10-22 | 1994-10-04 | Shell Oil Company | Slag-cement displacement by direct fluid contact |
| WO2001093842A2 (en) * | 2000-06-06 | 2001-12-13 | Deepearth Solutions Limited | Composition for controlling wellbore fluid and gas invasion and method for using same |
| WO2003014520A1 (en) * | 2001-08-02 | 2003-02-20 | Schlumberger Canada Limited | Shear-sensitive plugging fluid for plugging and a method for plugging a subterranean formation zone |
| CN101451061A (en) * | 2008-12-30 | 2009-06-10 | 山东大学 | Sand consolidation and water plugging profile control agent made by oil sand |
| CN101775273A (en) * | 2009-01-09 | 2010-07-14 | 中国石油化工股份有限公司 | High-temperature resistance base fluid for well cementing of oil gas well, preparation method and application thereof |
Non-Patent Citations (1)
| Title |
|---|
| 张成亚等: "境外某钾镁盐矿钻井液试验与实践", 《探矿工程(岩土钻掘工程)》, no. 12, 25 December 2007 (2007-12-25) * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103696729A (en) * | 2013-12-30 | 2014-04-02 | 河北联合大学 | Method for sealing drilled hole for mine gas drainage |
| CN103696729B (en) * | 2013-12-30 | 2016-04-27 | 河北联合大学 | The method of mine gas drainage drilling and sealing |
| CN108516719A (en) * | 2018-06-01 | 2018-09-11 | 西南科技大学 | Concrete waterproofer, waterproofing agent preparation method and water-proof concrete |
| CN108516719B (en) * | 2018-06-01 | 2021-03-09 | 西南科技大学 | Concrete waterproofing agent, preparation method thereof and waterproof concrete |
| CN108956435A (en) * | 2018-06-12 | 2018-12-07 | 中国石油天然气股份有限公司 | Simulation experiment method and device for high-temperature high-pressure reservoir corrosion |
| CN111909672A (en) * | 2020-08-10 | 2020-11-10 | 山东达源环保工程有限公司 | Preparation method of carboxymethyl cellulose modified profile control water shutoff agent |
| CN111943633A (en) * | 2020-08-20 | 2020-11-17 | 黄卫东 | Magnesium oxychloride cement slurry for grouting in potash magnesium salt mine area and method for implementing drilling hole sealing and well and roadway construction water stop engineering |
| CN111943633B (en) * | 2020-08-20 | 2021-08-27 | 黄卫东 | Magnesium oxychloride cement slurry for grouting in potash magnesium salt mine area and method for implementing drilling hole sealing and well and roadway construction water stop engineering |
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Application publication date: 20120627 |