WO2007012340A1 - Materiau destine a l'etanchement en construction de puits et au remplissage de cavites souterraines, en particulier de trous de forage profond - Google Patents

Materiau destine a l'etanchement en construction de puits et au remplissage de cavites souterraines, en particulier de trous de forage profond Download PDF

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Publication number
WO2007012340A1
WO2007012340A1 PCT/EP2005/008116 EP2005008116W WO2007012340A1 WO 2007012340 A1 WO2007012340 A1 WO 2007012340A1 EP 2005008116 W EP2005008116 W EP 2005008116W WO 2007012340 A1 WO2007012340 A1 WO 2007012340A1
Authority
WO
WIPO (PCT)
Prior art keywords
material according
marl
proportion
nitrate
clay
Prior art date
Application number
PCT/EP2005/008116
Other languages
German (de)
English (en)
Inventor
Gerhard Grotendorst
Original Assignee
Edi Exploration Drilling International Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Edi Exploration Drilling International Gmbh filed Critical Edi Exploration Drilling International Gmbh
Priority to EP05769625A priority Critical patent/EP1907665A1/fr
Priority to PCT/EP2005/008116 priority patent/WO2007012340A1/fr
Publication of WO2007012340A1 publication Critical patent/WO2007012340A1/fr

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Classifications

    • 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
    • C09K8/42—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
    • C09K8/46—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing inorganic binders, e.g. Portland cement
    • C09K8/467—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing inorganic binders, e.g. Portland cement containing additives for specific purposes
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • 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
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/10—Sealing or packing boreholes or wells in the borehole
    • E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
    • 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

Definitions

  • the invention relates to a material for sealing in well construction and for backfilling of underground cavities, especially deep wells, with a mixture containing a major proportion of marl and a proportion of cement.
  • groundwater fountains For the extraction of groundwater fountains are usually used. Groundwater is drawn in from the wells through a water-bearing layer and pumped over the surface. It is important that the pumped groundwater contains no impurities. It is problematic if when pumping out the groundwater from the relevant water-bearing layer so-called extraneous water, d. H. Water from other layers, which often contains salt water, is promoted. Furthermore, it is particularly in areas where an agricultural use of the soil takes place, so that often increased nitrate levels occur in groundwater. The increased nitrate levels are thought to be due to fertilization of the soil as nitrates enter aquifers and across these into the groundwater horizon.
  • Object of the present invention is to provide a material of the type mentioned, by which the above disadvantages are avoided.
  • This object is achieved according to the invention essentially in that the mixture of marl and cement, an additional proportion of sand and an additional proportion of clay is added.
  • the mixture of the constituents marl, cement, sand and clay results in a material which is more plastic or more elastic than the mixture of marl and cement known from the prior art, with the result that the material does not react to rock movements tears.
  • the hardness of the composition according to the invention is significantly reduced compared to the material consisting of marl and cement.
  • the additional proportion of clay provides for the elastic to plastic behavior.
  • the additional proportion of sand ensures that not only a kind of scaffolding in the material results from the grains of sand, the grains of sand also in contact or at the transition to the mountains a solid and thus durable or permanent connection between the mountains and the material ago.
  • the sand scaffold in conjunction with the clay compensates for rock movements and contributes to the stabilization of the introduced and hardened in the cavity concerned material. Without the sand content, the material would be elastic or plastic enough to ensure a sufficient tightness of the material itself during movements in the mountains, but detachment of the material from the rock wall could take place, which would favor the entry of external water at this point.
  • the additional amount of sand reduces the risk of detachment of the material from the mountains, thereby preventing any gaps from forming at the transition point.
  • the use of very fine sand particles causes the pores in the mountains are closed by the sand.
  • any clay or sand content in the marl does not correspond to the additional levels of sand and clay provided by the invention.
  • it is deliberately added to the in situ won marl, which may already contain sand and clay, an additional proportion of sand and clay as well as the proportion of cement is added to the marl.
  • the material according to the invention has a predominant proportion of marl. This means that the proportion of marl constitutes the largest fraction in the composition according to the invention.
  • Marl as is well known, are calcareous, light to dark gray, brownish or glaucous greenish, fine-grained, easily cleavable, often rich in microfossils and sometimes very hard clays. It distinguishes clay marl, which contain 25 to 35% lime, normal marl, which contain between 35 and 65% lime and limestones, which contain between 65 and 75% lime.
  • Main minerals are calcite, rarely dolomite, and clay minerals. Are still more mixed parts available, it is called z.
  • Sandy siliceous (with quartz), glauconitic or bituminous marls.
  • Nitrate is used by microorganisms under aerobic and anaerobic conditions as nitrogen source for the synthesis of cell components (asimilatory nitrate reduction) and / or under anaerobic conditions for nitrate respiration (dissimilatory nitrate reduction).
  • the dissimilatory nitrate reduction is important.
  • Denitrifying bacteria are able to reduce nitrate through nitrite to gaseous nitrogen.
  • nitrate In the absence of oxygen, nitrate is used as the electron acceptor in aerobic bacteria. Nitrate can also be used as an electron acceptor by facultative anaerobic bacteria. In this so-called nitrate amonification, nitrate is first reduced to nitrite. Instead of a conversion to gaseous nitrogen, nitrite is further reduced to ammonium by means of fermentation without direct energy gain. The process of denitrification is preferred over nitrate ammonification because of its higher energy gain for the microorganisms.
  • the term nitrate degradation can be understood as meaning both the reduction of nitrate via nitrite to gaseous nitrogen and the nitrite to ammonium.
  • the material according to the invention contributes to an increased nitrate decomposition of the nitrates reaching, for example, via fertilization of the soil into the water-bearing layers.
  • the material according to the invention thus also has a nitrate-consuming or nitrate-converting action.
  • the higher metabolic activity leads to higher conversion rates for nitrate degradation, in which, in addition to bacteria, fungi may possibly also be involved.
  • a nutrient medium for nitrate-degrading microorganisms is added as an additive.
  • other substances which may have a positive effect on growth for example those substances which may contribute to reducing growth-inhibiting substances or, if appropriate, also enzymes which assist in the metabolic processes of the microorganisms involved in the nitrate decomposition ,
  • an organic, preferably carbonaceous, the metabolic activity-promoting additive in particular a cellulosic additive
  • nitrate decomposition takes place predominantly at low oxygen contents with simultaneous presence of bioavailable organic substance. It is usually the case that in the soil zone and in the groundwater area initially organic material is gradually converted by microbial nitrate decomposition. The consequence can be a sudden increase in nitrate concentrations in previously unobtrusive waters.
  • the additional proportion of an additive that promotes the metabolic activity of nitrate-degrading microorganisms and / or the nutrient medium for nitrate-degrading microorganisms has a proportion of between 0.1% by weight to 20% by weight, in particular 0.2% by weight to 10% by weight. % more preferably 0.3 wt .-% to 5 wt .-% to.
  • the amount of marl in the total material should be between 40 and 70% by weight.
  • the proportion is between 50 and 60 wt .-%.
  • It should preferably be a marl with a lime content of between 50 and 90% and a clay content between 20 and 40%.
  • the lime content in the marl should be between 65 and 75% and in particular about 70%. So it should preferably be used a lime marl.
  • the clay content in the marl should be between 25 and 35%, preferably about 30%, wherein 1 to 10% of the clay content in the marl may be swellable.
  • the above marl is one having the above-mentioned constituents in situ, that is, recovered as it is.
  • a proportion of cement should be between 5 and 25% by weight, in particular between 10 and 20% by weight, which is in particular a cement according to DIN 1164.
  • the amount of sand added to the mixture of marl and cement should be between 5 and 25% by weight, preferably between 10 and 20% by weight.
  • the sand is quartz sand, which preferably has different grain fractions, namely preferably a larger grain fraction and a smaller grain fraction.
  • the larger grain fraction essentially serves the skeleton formation in the material according to the invention, while the smaller grain fraction is used in particular for contact formation to the mountains or to increase the roughness. It has been found that the larger grain fraction should have a grain size of up to 0.3 mm, while the second smaller grain fraction should have a grain size of less than 0.1 mm.
  • the proportion of the first larger grain fraction should be between 2.5 and 7.5% by weight, while the second fraction with the smaller grain fraction should be between 7 and 12% by weight.
  • the proportions of the individual grain fractions can vary depending on the application or type of rock as well as the grain sizes. In a very coarse-pored mountains larger grain fractions are used, while in a very fine-pored mountains smaller particle sizes are used.
  • the additional proportion of clay which improves the elasticity or plasticity of the material according to the invention should be between 5 and 25% by weight and in particular between 10 and 20% by weight.
  • the clay should be ground bentonite.
  • the material has a specific gravity of between 1.5 and 2, preferably between 1.7 and 1.8.
  • the particular desired specific gravity is controlled by a larger (lower specific gravity) or smaller (higher specific gravity) content of water.
  • the advantage of such a material is that the individual components do not segregate after the introduction of the material as a suspension in the annulus or the mountains to be sealed and before setting, so no decrease in heavier components takes place during the several hours lasting setting time. By adjusting the aforementioned specific weight results in a homogeneous distribution of the individual components of the material according to the invention until it is cured.
  • the material according to the invention as such has a proportion of the mixture of cement and limestone of about 70.5% by weight in the dry state.
  • This mixture contains about 20% cement according to DIN 1164 and about 80% limestone marl.
  • the marl is composed of a lime content of about 70% and a clay content of about 30%.
  • the admixture of lime marl and cement is admixed with an approximately 15% proportion of ground clay.
  • Also admixed is a proportion of 14.5% by weight of quartz sand.
  • the quartz sand has a proportion with a particle size of up to 0.3 mm of 5 wt .-% and a proportion with a particle size of less than 0.1 mm 9.5 wt .-% on.
  • the mixture is added with a proportion of water to give a specific gravity of 1.7.
  • a proportion of water it is also understood that it is in principle possible to mix the individual portions as such, first with water and then to give together. Ultimately, the water-added material gives a suspension.
  • the mixed suspension is then introduced into the annulus and pressurized so that it is also pressed into or on the unbound mountains. After a predetermined curing time of several hours, the material or the suspension hardens.
  • FIGURE of the drawing shows a borehole in a ground formation 1, wherein the borehole has been lowered into a water-bearing layer of the ground formation 1 via a drill bit 2 of a sampling device 4 provided at the end of a drill string 3.
  • a material 5 is provided in the annular gap between the borehole wall and the outer wall of the drill string 3 in the region of the sampling device 4, which according to the invention contains a predominant amount of marl, a proportion of cement and an additional proportion of sand and an additional amount of clay.
  • the material 5 has an additional proportion of a metabolic activity of nitrate-degrading microorganisms promoting additive.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Ceramic Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Physics & Mathematics (AREA)
  • Structural Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Soil Conditioners And Soil-Stabilizing Materials (AREA)

Abstract

L'invention concerne un matériau destiné à l'étanchement en construction de puits et au remplissage de cavités souterraines, en particulier de trous de forage profond, lequel matériau contient une proportion prépondérante de marne et une proportion de ciment. L'objectif de cette invention est d'obtenir un étanchement durable et efficace d'une nappe phréatique. A cet effet, une proportion supplémentaire de sable et une proportion supplémentaire d'argile sont mélangées à la marne et au ciment.
PCT/EP2005/008116 2005-07-26 2005-07-26 Materiau destine a l'etanchement en construction de puits et au remplissage de cavites souterraines, en particulier de trous de forage profond WO2007012340A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP05769625A EP1907665A1 (fr) 2005-07-26 2005-07-26 Materiau destine a l'etanchement en construction de puits et au remplissage de cavites souterraines, en particulier de trous de forage profond
PCT/EP2005/008116 WO2007012340A1 (fr) 2005-07-26 2005-07-26 Materiau destine a l'etanchement en construction de puits et au remplissage de cavites souterraines, en particulier de trous de forage profond

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2005/008116 WO2007012340A1 (fr) 2005-07-26 2005-07-26 Materiau destine a l'etanchement en construction de puits et au remplissage de cavites souterraines, en particulier de trous de forage profond

Publications (1)

Publication Number Publication Date
WO2007012340A1 true WO2007012340A1 (fr) 2007-02-01

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PCT/EP2005/008116 WO2007012340A1 (fr) 2005-07-26 2005-07-26 Materiau destine a l'etanchement en construction de puits et au remplissage de cavites souterraines, en particulier de trous de forage profond

Country Status (2)

Country Link
EP (1) EP1907665A1 (fr)
WO (1) WO2007012340A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103334444A (zh) * 2013-07-09 2013-10-02 中国一冶集团有限公司 一种基坑降水井泄压式的封堵方法
CN103343543A (zh) * 2013-07-09 2013-10-09 中国一冶集团有限公司 一种基坑降水井减压式封堵方法
CN105134123A (zh) * 2015-08-21 2015-12-09 山东省水利科学研究院 工程膨胀剂分层止水方法
CN105155591A (zh) * 2015-08-21 2015-12-16 山东省水利科学研究院 地下水生物膨胀分层止水方法
CN106223346A (zh) * 2016-07-21 2016-12-14 北京市水科学技术研究院 一种报废机井的封填方法
CN112144556A (zh) * 2020-09-29 2020-12-29 同济大学 防治基坑降压井承压水侧壁突涌的分层止水装置和方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3512709A1 (de) * 1985-04-09 1986-10-09 Fa. J. u. G. Grotendorst, 4280 Borken Verfahren zum herstellen und abdichten eines brunnens sowie vorrichtung zur durchfuehrung des verfahrens und brunnen
DE19806923C1 (de) * 1998-02-19 1999-05-12 Ochs Bohrgesellschaft Mbh Verfahren zur Abdichtung einer Brunnenbohrung

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3512709A1 (de) * 1985-04-09 1986-10-09 Fa. J. u. G. Grotendorst, 4280 Borken Verfahren zum herstellen und abdichten eines brunnens sowie vorrichtung zur durchfuehrung des verfahrens und brunnen
DE19806923C1 (de) * 1998-02-19 1999-05-12 Ochs Bohrgesellschaft Mbh Verfahren zur Abdichtung einer Brunnenbohrung

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103334444A (zh) * 2013-07-09 2013-10-02 中国一冶集团有限公司 一种基坑降水井泄压式的封堵方法
CN103343543A (zh) * 2013-07-09 2013-10-09 中国一冶集团有限公司 一种基坑降水井减压式封堵方法
CN103334444B (zh) * 2013-07-09 2016-04-20 中国一冶集团有限公司 一种基坑降水井泄压式的封堵方法
CN105134123A (zh) * 2015-08-21 2015-12-09 山东省水利科学研究院 工程膨胀剂分层止水方法
CN105155591A (zh) * 2015-08-21 2015-12-16 山东省水利科学研究院 地下水生物膨胀分层止水方法
CN105155591B (zh) * 2015-08-21 2017-03-08 山东省水利科学研究院 地下水生物膨胀分层止水方法
CN106223346A (zh) * 2016-07-21 2016-12-14 北京市水科学技术研究院 一种报废机井的封填方法
CN106223346B (zh) * 2016-07-21 2018-05-08 北京市水科学技术研究院 一种报废机井的封填方法
CN112144556A (zh) * 2020-09-29 2020-12-29 同济大学 防治基坑降压井承压水侧壁突涌的分层止水装置和方法
CN112144556B (zh) * 2020-09-29 2021-11-09 同济大学 防治基坑降压井承压水侧壁突涌的分层止水装置和方法

Also Published As

Publication number Publication date
EP1907665A1 (fr) 2008-04-09

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