CN102180641A - Method and process for high strength curing of drilling waste - Google Patents
Method and process for high strength curing of drilling waste Download PDFInfo
- Publication number
- CN102180641A CN102180641A CN2011100323269A CN201110032326A CN102180641A CN 102180641 A CN102180641 A CN 102180641A CN 2011100323269 A CN2011100323269 A CN 2011100323269A CN 201110032326 A CN201110032326 A CN 201110032326A CN 102180641 A CN102180641 A CN 102180641A
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- magnesium oxide
- flyash
- curing
- percent
- portland cement
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The invention relates to a method and a process for the high strength curing of drilling waste, in particular to a curing agent and a curing process. The curing agent consists of the following components in percentage by weight: 30 to 35 percent of magnesia, 20 to 25 percent of magnesium chloride, 30 to 35 percent of fly ash, 0.8 to 1 percent of modifier and 10 to 18 percent of water. The curing process comprises the following steps of: uniformly mixing the drilling waste, light burned magnesia, the fly ash and the modifier, adding magnesium chloride aqueous solution into the mixture, quickly mixing, putting into a die, performing compaction molding, demolding, and naturally curing at the environment temperature. The compression strength of a product after the product is cured for 28 days can reach 40MPa, the compression strength of the drilling waste with 10 percent of salt after the drilling waste is cured for 28 days can reach 32MPa, and extract heavy metal ions meet the environment-friendly requirement. The cured product has high compression strength and comprises 40 to 60 percent of drilling waste, and the cured drilling waste has high stability and recycling value.
Description
Technical field
The present invention relates to oil-gas field offal treatment and recycling field thereof.
Background technology
Drilling wastes is meant that mainly rejected well drilling liquid and drilling cuttings etc. form solid waste after dehydration in the petroleum drilling or the mummification among the present invention.
This class solid waste that produces in the drilling process mainly contains clay, drilling cuttings, high-density weighting material and organic additive for drilling fluid.Undressed drilling wastes can bring certain harm to surrounding enviroment.For this type of refuse processing method, mainly contain methods such as direct discharging, landfill, curing, annular space or safe formation re-injection.At first, such waste is mainly used direct discharging and burying method is handled, and along with the further raising of environmental requirement, these two kinds of methods have been subjected to certain restriction.Annular space and safe formation re-injection, required equipment processing requirement complexity, cost height are not also used on a large scale in China at present.Solidification method is a drilling wastes treatment process commonly used.
At present, China's drilling wastes solidification treatment adopts single or composite curing agents such as portland cement, flyash more, directly uses the long-armed stirring of excavator at situ of drilling well, carries out scene or in-situ solidifying and handles, and fixed back landfill or earthing are restoreed abandoned land to cultivation.It is inhomogeneous that this method processing exists processing, defectives such as Pollutants Diffusion and migration.Having grown up with discarded drilling cuttings recycling abroad gradually is the stabilization/solidification technology of purpose.This class technology mainly is divided into two aspects: the one, and the oil-containing drilling wastes is mixed bituminous concrete mix, as road-making material; The 2nd, drilling cuttings mummification, pulverizing back are mixed with other materials (as clay), under hot conditions, be fired into building brick.There are problems such as the high and energy consumption of transportation cost is big in these two kinds of treatment processs.Above method there is no the effective solidified utilisation technology of waste salt-containing drilling thing (bore and meet saline bed or use the drilling wastes that salt-water drilling fluid produces).
Magnesium oxychloride cementing material technology is simple, and production energy consumption is little, and product has intensity height, advantage such as wear-resisting, can return halogen, distortion, water tolerance by what mix that materials such as flyash, slag, fiber or styrene emulsion improve this series products.Magnesium oxychloride cementing material has bigger application potential at environmental pollution control and solid waste resource recovery aspect utilizing, U.S. Pat 5439318 has been invented and has been used refuse and the soil technology that the glued envelope of magnesium oxychloride material is wrapped up in heavy metal contamination, makes the pollutent immobilization.Waste TCLP test result after the curing, heavy metal ion such as arsenic, barium, cadmium, chromium, lead, mercury, silver all are lower than the normality limit value.Chinese patent CN101823869 has invented a kind of fiber reinforced magnesium oxychloride red mud plate and preparation method, and the sheet material of preparation can have higher economy and environmental benefit with the utilization of aluminum oxide industry waste material red mud building materials.
Chlorion participates in the hydration process of magnesium oxychloride material, is that chlorion is a kind of important chemical composition in its hydrated product, can make the chlorion immobilization.It is consolidating material that the present invention adopts chlorine oxygen magnesium, and flyash and properties-correcting agent are subsidiary material, and with drilling wastes, waste salt-containing drilling thing solidification treatment, cured article has high compression strength and heavy metal ion leaching level is lower than the national requirements concentration limit.
Summary of the invention
Purpose of the present invention is for drilling wastes provides solidification processing method and the technology that a kind of technology is simple, intensity is high and Environmental compatibility is good.The Environmental compatibility and the potential recycling that utilize this method and technology can increase substantially drilling wastes are worth.
Know-why of the present invention: magnesium oxide, magnesium chloride and water are formed the MgO-MgCl of magnesia oxychloride cement hydration reaction
2-H
2The O ternary system, MgO-MgCl under the normal temperature
2-H
2Chemical reaction that the O system is finished and generation product can be simply suc as formula shown in (1)～(2).
MgO+H
2O→Mg(OH)
2 (1)
mMgO+MgCl
2+nH
2O→mMg(OH)
2·MgCl
2·(n-1)H
2O (2)
MMg (OH)
2MgCl
2(n-1) H
2O is mainly 5Mg (OH)
2MgCl
28H
2O (5 phase) and, 3Mg (OH)
2MgCl
28H
2O (3 phase), wherein 5 is main intensity phase mutually.Active SiO in the flyash
2And Al
2O
3Under alkaline condition, coagulate rigid reaction, can generate siliceous 5 phases, can reduce by 5 in opposite directions 3 mutually and Mg (OH)
2Conversion, improve condensate performance.
Main contents of the present invention: solidifying agent mainly contains magnesium oxide, magnesium chloride, flyash, properties-correcting agent and water to be formed, wherein, and light calcined magnesia 20～40%, magnesium chloride 10%～30%, flyash 20～45%, properties-correcting agent 0.5%～1.2%, water 10%～30%.
Wherein, properties-correcting agent mainly consists of quartz 10%～30%, gypsum 15～20%, potassiumphosphate 0～20%, Tai-Ace S 150 0～30%.
The drilling wastes dosage is 40%～60%, compaction moulding, and natural curing 28d under the envrionment temperature, ultimate compression strength can reach 40MPa.
Concrete grammar: in drilling wastes, add flyash, light calcined magnesia and properties-correcting agent successively, after mixing, add magnesium chloride solution, after puddling evenly, change mould over to, compression moulding, the fixed back demoulding, natural curing is at ambient temperature solidified drilling wastes 28d ultimate compression strength and can be reached 40MPa, and leach liquor heavy metal ion level is lower than national solid dangerous waste and leaches the toxicity limit value.
Compared with prior art, advantage of the present invention is as follows:
1, the present invention uses the solidification treatment system that magnesium oxide-magnesium chloride-flyash constitutes, and has promptly realized the stabilization/solidification treatment to drilling wastes, gives its stronger ultimate compression strength simultaneously, makes it to have than the large resource utility value.
2, magnesium oxide is mainly fired by magnesite among the present invention, and its calcining temperature is about 700 ℃, is lower than portland cement calcining temperature and clay brick firing temperature, has power savings advantages.
3, the flyash that uses among the present invention is power plant's industrial waste, and treatment of wastes with processes of wastes against one another environment protection significance is great.
4, curing process is simple to operation among the present invention, is easy to large-scale promotion.
Embodiment
Embodiment 1
Get the solid waste 1kg that solid controlling system is discharged in certain oilfield drilling, after the solidifying agent of different compositions mixes, compaction moulding, the fixed back demoulding, 3d is measured in natural curing under the envrionment temperature respectively, 7d, 14d, 28d ultimate compression strength the results are shown in Table 1.
Table 1 drilling wastes high strength solidification treatment solidifying agent is formed and ultimate compression strength
Annotate: " * " expression " is not surveyed "
Embodiment 2
Get drilling wastes in the example 1, add sodium-chlor respectively, make the simulation waste salt-containing drilling thing 1kg of different sodium chloride contents, form according to No. 5 solidifying agent in the table 1, be cured processing, its ultimate compression strength the results are shown in Table 2.
Table 2 waste salt-containing drilling object height intensity is solidified and ultimate compression strength
Annotate: " * " expression " is not surveyed "
Embodiment 3
Get above-mentioned drilling wastes, solidify the drilling wastes sample No. 5, No. 6, No. 10, be crushed to particle diameter less than 9.5mm, with sulfuric acid-nitric acid (mass ratio 2: 1) the laboratory pure water is regulated pH to 3.25, take by weighing according to solid sample and digestion agent in 1: 10 ratio, (frequency 110 ± 2 times/min), static 16h is with 0.45 cellulose acetate membrane filtration for level concussion 8h, heavy metal ion is formed in the test leach liquor, the results are shown in Table 3.
Table 3 solidifies drilling wastes leach liquor heavy metal ion to be formed
Annotate: "-" indicates " not detecting "
Embodiment 4
Get domestic certain oil field and deposit the solid waste of various oil field working fluid pollution discharge pond such as rejected well drilling liquid, flushing fluid, fracturing liquid, add 0.4kg flyash, 0.36kg magnesium oxide, 0.26kg magnesium chloride, 0.012kg properties-correcting agent and 0.1kg water according to every kilogram of solid waste (dry weight), puddle evenly, compaction moulding, after the fixed demoulding, natural curing 30d under the envrionment temperature, its ultimate compression strength is 40MPa.To solidify the waste sample, be crushed to particle diameter less than 9.5mm, with sulfuric acid-nitric acid (mass ratio 2: 1) the laboratory pure water is regulated pH to 3.25, take by weighing according to solid sample and digestion agent in 1: 10 ratio, (frequency 110 ± 2 times/min), static 16h is with 0.45 cellulose acetate membrane filtration for level concussion 8h, heavy metal ion is formed in the test leach liquor, the results are shown in Table four.
Table four solidifies waste leach liquor contaminant detection results
| Project | Emission standard | Detected result |
| PH value | ＜＝6～9 | 8.72mg/L |
| Chemical oxygen demand (COD) | ＜＝150mg/L | 103.2mg/L |
| Petroleum-type | ＜＝10.0mg/L | 2.0mg/L |
| Vegetable and animals oils | ＜＝15.0mg/L | 1.8mg/L |
| Sulfide | ＜＝1.0mg/L | 0.015mg/L |
| Suspended substance | ＜＝150mg/L | 9mg/L |
| Colourity | ＜＝80 | 8 |
| Ammonia nitrogen | ＜＝25mg/L | 0.685mg/L |
| Arsenic | ＜＝0.5mg/L | 0.01mg/L |
| Copper | ＜＝1.0mg/L | 0.023mg/L |
| Zinc | ＜＝5.0mg/L | 0.039mg/L |
| Plumbous | ＜＝1.0mg/L | 0.038mg/L |
| Every | ＜＝0.1mg/L | 0.024mg/L |
| Nickel | ＜＝1.0mg/L | 0.486mg/L |
| Manganese | ＜＝5.0mg/L | - |
Annotate: "-" indicates " not detecting "
Claims (9)
1. drilling wastes high strength solidification processing method and technology, concrete grammar: drilling wastes and solidifying agent, properties-correcting agent and water are mixed the mould of packing into, compacting, treat its fixed back demoulding, natural curing under the envrionment temperature forms high-intensity curing drilling wastes.
2. according to the used solidifying agent of the described drilling wastes high strength of claim 1 curing process, it is characterized in that: one or more of gelling material such as portland cement, well cementation G class g cement, lime, little silicon, cement flue Dust, zeolite, magnesium oxide, magnesium chloride, sal epsom, flyash, blast-furnace slag.
3. according to the formed single or composite curing system of right 2 described gelling material.It is characterized in that: portland cement, portland cement-magnesium oxide, well cementation G class g cement-magnesium oxide, zeolite-portland cement, portland cement-lime, portland cement-blast-furnace slag, portland cement-flyash, portland cement-cement flue Dust, magnesium oxide-magnesium chloride, magnesium oxide-magnesium chloride-flyash, magnesium oxide-sal epsom, magnesium oxide-sal epsom-flyash etc.
4. be mainly magnesium gelatinous material according to right 3 described composite curing agents, it is characterized in that: magnesium oxide-magnesium chloride-flyash composite curing system.
5. according to right 1 described properties-correcting agent, it is characterized in that: be mainly compositions such as quartz, gypsum, kaolinite, phosphoric acid and soluble salt thereof, sulfuric acid and soluble salt salt thereof.
6. according to phosphoric acid described in the right 6 and soluble salt and sulfuric acid and soluble salt thereof, it is characterized in that: be one or more of phosphoric acid, sodium phosphate, SODIUM PHOSPHATE, MONOBASIC, Sodium phosphate dibasic, potassiumphosphate, potassium primary phosphate, potassium hydrogen phosphate, aluminum phosphate, one or more of sulfuric acid, sodium sulfate, vitriolate of tartar, Tai-Ace S 150.
7. according to right 6 described properties-correcting agent, it is characterized in that: quartz 10%～30%, gypsum 15～20%, potassiumphosphate 0～20%, Tai-Ace S 150 0～30%.
8. form according to right 1 described drilling wastes solidification treatment composite curing system, it is characterized in that: magnesium oxide, magnesium chloride, flyash, properties-correcting agent and water are formed, wherein, magnesium oxide 30%～35%, magnesium chloride 20%～25%, flyash 30%～35%, properties-correcting agent 0.8%～1%, water 10%～18%.
9. solidifying the drilling wastes ratio according to claim 1 is 40%～60%, compaction moulding, and natural curing 28d under the envrionment temperature, ultimate compression strength can reach 40MPa.
Priority Applications (1)
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|---|---|---|---|
| CN2011100323269A CN102180641A (en) | 2011-01-26 | 2011-01-26 | Method and process for high strength curing of drilling waste |
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|---|---|---|---|
| CN2011100323269A CN102180641A (en) | 2011-01-26 | 2011-01-26 | Method and process for high strength curing of drilling waste |
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| CN102180641A true CN102180641A (en) | 2011-09-14 |
Family
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| CN2011100323269A Pending CN102180641A (en) | 2011-01-26 | 2011-01-26 | Method and process for high strength curing of drilling waste |
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Cited By (18)
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| CN102516964A (en) * | 2011-12-06 | 2012-06-27 | 中国石油集团渤海钻探工程有限公司 | Low-density and high-strength cement paste |
| CN102657926A (en) * | 2012-04-13 | 2012-09-12 | 武汉理工大学 | Heavy metal normal temperature curing agent and method for curing heavy metal in heavy metal pollutants by use of heavy metal normal temperature curing agent |
| CN103664126A (en) * | 2012-09-20 | 2014-03-26 | 深圳市海川实业股份有限公司 | Sludge curing treatment agent and method for treating sludge by use of curing treatment agent |
| CN103864391A (en) * | 2014-01-16 | 2014-06-18 | 刘洪军 | Efficient soil stabilizer |
| CN104418560A (en) * | 2013-08-20 | 2015-03-18 | 深圳市铁汉生态环境股份有限公司 | Curing agent for treating heavy metal pollution and heavy metal curing method |
| CN104446317A (en) * | 2014-11-03 | 2015-03-25 | 中国石油大学(华东) | Method for carrying out high strength hardening on solid drilling wastes |
| CN105295943A (en) * | 2015-11-23 | 2016-02-03 | 山东省农业科学院农业资源与环境研究所 | Heavy metal passivator for simultaneous passivation of farmland soil cadmium, lead and zinc and preparation method |
| CN106431040A (en) * | 2016-08-25 | 2017-02-22 | 北京华油兴业能源技术有限公司 | Drilling rock harmless treatment and resource utilization technology and device |
| CN106630813A (en) * | 2016-09-22 | 2017-05-10 | 上海化工研究院有限公司 | Curing agent for treating drill cuttings and application thereof |
| CN107254314A (en) * | 2017-06-23 | 2017-10-17 | 北京农业职业学院 | A kind of soil-solidified-agent and its preparation method and application |
| CN107954680A (en) * | 2016-10-18 | 2018-04-24 | 中国石油化工股份有限公司 | A kind of high-temperature chlorine oxygen magnesium thermosetting resin gelling system and firming body and its preparation method |
| CN108531188A (en) * | 2018-04-28 | 2018-09-14 | 中国石油天然气集团有限公司 | A kind of inorganic agent and preparation method thereof of water-base drilling fluid drilling cuttings |
| CN110318696A (en) * | 2019-06-25 | 2019-10-11 | 河南省地质矿产勘查开发局第四地质矿产调查院 | Harmless treatment process for water-based waste drilling fluid |
| CN110950624A (en) * | 2019-11-15 | 2020-04-03 | 姜立平 | Preparation method of composite board based on waste utilization |
| CN110981126A (en) * | 2019-11-28 | 2020-04-10 | 陈红元 | Waste ash curing agent, preparation method and application thereof in sludge curing |
| CN111660401A (en) * | 2020-05-22 | 2020-09-15 | 余景春 | Formaldehyde-free mineral glue density board and preparation process thereof |
| CN111704433A (en) * | 2020-07-02 | 2020-09-25 | 中国海洋石油集团有限公司 | Composite curing agent and application thereof |
| CN112979321A (en) * | 2019-12-16 | 2021-06-18 | 中石化石油工程技术服务有限公司 | Method for utilizing drilling waste |
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| CN102516964A (en) * | 2011-12-06 | 2012-06-27 | 中国石油集团渤海钻探工程有限公司 | Low-density and high-strength cement paste |
| CN102516964B (en) * | 2011-12-06 | 2013-12-04 | 中国石油集团渤海钻探工程有限公司 | Low-density and high-strength cement paste |
| CN102657926A (en) * | 2012-04-13 | 2012-09-12 | 武汉理工大学 | Heavy metal normal temperature curing agent and method for curing heavy metal in heavy metal pollutants by use of heavy metal normal temperature curing agent |
| CN102657926B (en) * | 2012-04-13 | 2014-04-09 | 武汉理工大学 | Heavy metal normal temperature curing agent and method for curing heavy metal in heavy metal pollutants by use of heavy metal normal temperature curing agent |
| CN103664126A (en) * | 2012-09-20 | 2014-03-26 | 深圳市海川实业股份有限公司 | Sludge curing treatment agent and method for treating sludge by use of curing treatment agent |
| CN104418560A (en) * | 2013-08-20 | 2015-03-18 | 深圳市铁汉生态环境股份有限公司 | Curing agent for treating heavy metal pollution and heavy metal curing method |
| CN104418560B (en) * | 2013-08-20 | 2017-01-18 | 深圳市铁汉生态环境股份有限公司 | Curing agent for treating heavy metal pollution and heavy metal curing method |
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| CN103864391A (en) * | 2014-01-16 | 2014-06-18 | 刘洪军 | Efficient soil stabilizer |
| CN104446317A (en) * | 2014-11-03 | 2015-03-25 | 中国石油大学(华东) | Method for carrying out high strength hardening on solid drilling wastes |
| CN105295943B (en) * | 2015-11-23 | 2018-07-13 | 山东省农业科学院农业资源与环境研究所 | Heavy metal deactivator and preparation method thereof that is a kind of while being passivated cadmium in agricultural land soil, lead, zinc |
| CN105295943A (en) * | 2015-11-23 | 2016-02-03 | 山东省农业科学院农业资源与环境研究所 | Heavy metal passivator for simultaneous passivation of farmland soil cadmium, lead and zinc and preparation method |
| CN106431040A (en) * | 2016-08-25 | 2017-02-22 | 北京华油兴业能源技术有限公司 | Drilling rock harmless treatment and resource utilization technology and device |
| CN106630813A (en) * | 2016-09-22 | 2017-05-10 | 上海化工研究院有限公司 | Curing agent for treating drill cuttings and application thereof |
| CN107954680A (en) * | 2016-10-18 | 2018-04-24 | 中国石油化工股份有限公司 | A kind of high-temperature chlorine oxygen magnesium thermosetting resin gelling system and firming body and its preparation method |
| CN107254314A (en) * | 2017-06-23 | 2017-10-17 | 北京农业职业学院 | A kind of soil-solidified-agent and its preparation method and application |
| CN108531188A (en) * | 2018-04-28 | 2018-09-14 | 中国石油天然气集团有限公司 | A kind of inorganic agent and preparation method thereof of water-base drilling fluid drilling cuttings |
| CN110318696A (en) * | 2019-06-25 | 2019-10-11 | 河南省地质矿产勘查开发局第四地质矿产调查院 | Harmless treatment process for water-based waste drilling fluid |
| CN110318696B (en) * | 2019-06-25 | 2021-10-26 | 河南省地质矿产勘查开发局第四地质矿产调查院 | Harmless treatment process for water-based waste drilling fluid |
| CN110950624A (en) * | 2019-11-15 | 2020-04-03 | 姜立平 | Preparation method of composite board based on waste utilization |
| CN110981126A (en) * | 2019-11-28 | 2020-04-10 | 陈红元 | Waste ash curing agent, preparation method and application thereof in sludge curing |
| CN112979321A (en) * | 2019-12-16 | 2021-06-18 | 中石化石油工程技术服务有限公司 | Method for utilizing drilling waste |
| CN112979321B (en) * | 2019-12-16 | 2022-10-14 | 中石化石油工程技术服务有限公司 | Method for utilizing drilling waste |
| CN111660401A (en) * | 2020-05-22 | 2020-09-15 | 余景春 | Formaldehyde-free mineral glue density board and preparation process thereof |
| CN111704433A (en) * | 2020-07-02 | 2020-09-25 | 中国海洋石油集团有限公司 | Composite curing agent and application thereof |
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