CN106675530B - A method of inhibiting Red Sandstone disintegration - Google Patents
A method of inhibiting Red Sandstone disintegration Download PDFInfo
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- CN106675530B CN106675530B CN201611173694.4A CN201611173694A CN106675530B CN 106675530 B CN106675530 B CN 106675530B CN 201611173694 A CN201611173694 A CN 201611173694A CN 106675530 B CN106675530 B CN 106675530B
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- red sandstone
- disintegration
- anionic surfactant
- red
- sandstone
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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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/04—Devices for withdrawing samples in the solid state, e.g. by cutting
- G01N1/08—Devices for withdrawing samples in the solid state, e.g. by cutting involving an extracting tool, e.g. core bit
Abstract
A kind of method for inhibiting Red Sandstone disintegration in water in core boring sampling of the disclosure: in core boring sampling, anionic surfactant is added in flushing liquor used.In the flushing liquor, the concentration expressed in percentage by weight of anionic surfactant effective component is not less than 10%, optium concentration 10~20%.By the method for the invention, during the Red Sandstone drill core that can effectively draw up the problem of disintegration in water, and it is low in cost.
Description
Technical field
The invention belongs to civil engineering industry geotechnical investigation fields, and in particular to one kind inhibits red sand in drill sampling
The method of rockfall solution.
Background technique
Commonly called " Red Sandstone " is primarily referred to as Jurassic Period to the land facies red series of rocks of Neogene Period, and lithology is mud stone, sand
Rock, argillaceous sandstone, argillaceous siltstoue, Sandy Silt, siltstone etc., and it is referred to as " red soft rock ".Under natural endowment, Red Sandstone
Uniaxial compressive strength it is lower, exposure in air or meet water when easily soften, be disintegrated.
In civil engineering, in order to understand the foundation bearing capacity on Red Sandstone stratum, generally use drilling method to red in field
Sandstone formation is sampled, and indoors, is sampled using drilling method to Red Sandstone sillar, then to sample carry out resistance to compression,
Shear strength test.
Generally use water as the flushing liquor of drilling process in drilling process, flushing liquor has cooling drill bit, and boring mud is taken out of brill
The effect in hole.Due to Red Sandstone have disintegration in water characteristic, in drilling process, Red Sandstone contacted with water can lead to softening,
Disintegration can not sample so that the decline of core sample intensity is larger, or even rupture.Test result is caused to be distorted or can not test.
To seek the method for inhibiting Red Sandstone disintegration, Liu Xiaoming etc. has carried out disintegration experiment, hair to Red Sandstone disintegration character
Existing disintegration degree of the Red Sandstone in the disintegration liquid of different chemical composition and character difference (Liu Xiaoming, Xiong Li, Zhang Liangliang, Zhao Ming
Magnificent .I class Red Sandstone disintegration braking measure experimental study, highway communication science and technology, 2011,28 (3): 25~29).Publication No.
The Chinese patent literature of CN103627373A disclose it is a kind of with calcium ion, ethyl alcohol is as main component that Red Sandstone can be inhibited regional
The coolant liquid of armature boring disintegration, formula is: the concentration of each substance in aqueous solution: 0~0.8mol/L of concentration of calcium ion, second
The volume fraction 8~10% of alcohol, pH value 10~14.Coolant liquid in this method also has the function of inhibition Red Sandstone disintegration, but
Its proportion is complex, and price is higher, and effective component is ethyl alcohol, has safety problem, and readily volatilized in the natural environment.Cause
This, in Red Sandstone drill sampling, have it is less expensive to price, use more easily inhibit disintegrating method demand.
Summary of the invention
To solve the problems of the prior art, the present invention provides a kind of methods of inhibition Red Sandstone disintegration, especially answer
For inhibiting the disintegration of Red Sandstone sampling process.
A method of inhibiting Red Sandstone disintegration, Red Sandstone is contacted with aqueous solution of anionic surfactant.
The method of the inhibition Red Sandstone disintegration adds anionic surfactant in Red Sandstone and the water of contact
Aqueous solution is formed, in this way, the just instead of water of contact Red Sandstone, anionic surfactant form aqueous solution.
In the present invention, the way of contact can be that the aqueous solution comprising anionic surfactant is sprayed at disintegration to be suppressed
Red Sandstone surface；Or anionic surfactant is added in the aqueous solution immersed with Red Sandstone；Or Red Sandstone is impregnated
In the aqueous solution comprising anionic surfactant.
It in the present invention, can apply the inventive method to during Red Sandstone core boring sampling, for inhibiting collapsing for Red Sandstone
Solution.
As application, anionic surfactant is added in coolant liquid used in Red Sandstone core boring sampling.
During general geotechnical investigation and indoor Red Sandstone core boring sampling, the coolant liquid is aqueous solution.
It that is to say, anionic surfactant can be added in cooling water used in Red Sandstone core boring sampling.
By the study found that in aqueous solution of anionic surfactant, the concentration expressed in percentage by weight of anionic surfactant
Not less than 10%.
During Red Sandstone core boring sampling, it is preferred to use coolant liquid be comprising living not less than 10wt% anionic surface
The aqueous solution of property agent.
Further preferably, in aqueous solution of anionic surfactant, the concentration expressed in percentage by weight 10 of anionic surfactant
~20%.
The present inventors have additionally discovered that Red Sandstone is fully immersed in the molten of the anionic anionic surfactant of the concentration
Red Sandstone disintegration in water can effectively be prevented in liquid.Concentration is greater than after 20%, and inhibitory effect does not have clear improvement.Concentration is low
After 10%, inhibitory effect is unstable, i.e., has inhibiting effect to some disaggregations, some do not have then.
In the present invention, the anionic surfactant can be used anion yin well-known to those skilled in the art from
Sub- surfactant or commercial product comprising anionic anionic surfactant, such as the dish washing liquid of certain brands.
Inventor also selects that cationic surfactant is tested, and discovery cationic surfactant is insoluble in water,
Effect of its aqueous solution without obviously inhibition Red Sandstone disintegration.Cosolvent using 5% ethyl alcohol as cationic surfactant,
After the solubility for increasing cationic surfactant, water-ethanol solution inhibiting effect is still unobvious.
The inventors discovered that anionic surfactant is added in the water for impregnating Red Sandstone can be effectively suppressed red sand rockfall
Solution.Its mechanism are as follows: the surface tension for reducing water can be reduced or avoid water to enter rock capillary porosity, to reduce rock capillary
Void end gas compels the wall pressure of rock, and then achievees the purpose that inhibit Red Sandstone disintegration.Therefore there is following 3 aspect characteristic
Surfactant to inhibit Red Sandstone disintegration have obvious effect:
1, can be soluble easily in water, form certain concentration solution；
2, water surface tension is significantly reduced；
3, again not aitiogenic with Red Sandstone ingredient.
The present invention is that anionic surfactant concentration used is low with the advantage of existing product, is easy to get, no safety
Hidden danger has certain promotion value.
Detailed description of the invention
Fig. 1 is that the Red Sandstone under Red Sandstone natural conditions is disintegrated figure；
Fig. 2 is the Red Sandstone disintegration figure impregnated by tap water；
Fig. 3 is by the red sand of 5% cationic surfactant of concentration (cetyl trimethylammonium bromide) aqueous solution soaking
Rockfall solution figure；
Fig. 4 is by the red sand of 5% cationic surfactant of concentration (hexadecyltrimethylammonium chloride) aqueous solution soaking
Rockfall solution figure；
Fig. 5 is the Red Sandstone disintegration figure impregnated by 5% aqueous solution of anionic surfactant of concentration；
Fig. 6 is the Red Sandstone disintegration figure impregnated by 10% aqueous solution of anionic surfactant of concentration；
Fig. 7 is the Red Sandstone disintegration figure impregnated by 20% aqueous solution of anionic surfactant of concentration.
Specific embodiment
Fig. 1 show the produced Red Sandstone in Changsha city (geology title are as follows: apoplexy argillaceous siltstoue) under field conditions (factors)
Disintegration is serious.
Embodiment 1
Red Sandstone is soaked in anionic surfactant (dish washing liquid) aqueous solution that concentration expressed in percentage by weight is 5%, leaching
For 24 hours, Red Sandstone disintegration situation is shown in Fig. 5 to bubble, by the Red Sandstone of 5% anionic surfactant of concentration (dish washing liquid) aqueous solution soaking
Still have and be disintegrated to a certain degree, but situation impregnates improvement than pure water.
Embodiment 2
Red Sandstone is soaked in anionic surfactant (sodium alkyl sulfonate, fatty alcohol that concentration expressed in percentage by weight is 10%
Ether sodium sulfate) in aqueous solution, to impregnate for 24 hours, Red Sandstone disintegration situation is shown in Fig. 6, is slightly disintegrated.
Embodiment 3
Red Sandstone is soaked in the anionic surfactant (active constituent are as follows: alkyl sulphur that concentration expressed in percentage by weight is 20%
Sour sodium, fatty alcohol-ether sodium sulfate) in aqueous solution, to impregnate for 24 hours, Red Sandstone disintegration situation is shown in Fig. 7, and display is not disintegrated substantially.
Comparative example 1
Red Sandstone is soaked in tap water, the disintegration situation impregnated for 24 hours is shown in Fig. 2, and display Red Sandstone is disintegrated completely.
Comparative example 2
Cetyl trimethylammonium bromide is a kind of cationic surfactant, is insoluble in water.Selection has inhibition Red Sandstone
The ethyl alcohol of disintegration is as cosolvent.In 5% ethanol solution of tap water and concentration expressed in percentage by weight, then add weight percent 5%
Cationic surfactant (cetyl trimethylammonium bromide), 24 hours Red Sandstones are impregnated, as shown in figure 3, hexadecane
Base trimethylammonium bromide is not soluble in water, need to make cosolvent with ethyl alcohol, is in fact that ethyl alcohol inhibits to be disintegrated to a certain extent, rock
It is disintegrated or more serious.
Comparative example 3
Hexadecyltrimethylammonium chloride be also be a kind of cationic surfactant, be insoluble in water.Selection, which has, inhibits red
The ethyl alcohol of sandstone disintegration is as cosolvent.In 5% ethanol solution of tap water and concentration expressed in percentage by weight, then add weight percent
5% cationic surfactant (hexadecyltrimethylammonium chloride) impregnates 24 hours Red Sandstones, and Fig. 4 is by cation form
The Red Sandstone that activating agent (hexadecyltrimethylammonium chloride) solution in face impregnates；Hexadecyltrimethylammonium chloride surfactant
Floccule is formed with the ionic reaction being precipitated after rock immersion, hexadecyltrimethylammonium chloride is not soluble in water, and need to use ethyl alcohol
Make cosolvent, is in fact that ethyl alcohol inhibits to be disintegrated to a certain extent, disaggregation or more serious.
Claims (4)
1. a kind of method for inhibiting Red Sandstone disintegration, it is characterised in that: connect Red Sandstone and aqueous solution of anionic surfactant
Touching；
In aqueous solution of anionic surfactant, the concentration expressed in percentage by weight of anionic surfactant is not less than 10%；
The anionic surfactant is at least one of sodium alkyl sulfonate, fatty alcohol-ether sodium sulfate.
2. inhibiting the method for Red Sandstone disintegration as described in claim 1, it is characterised in that: add anionic surfactant
Into coolant liquid used in Red Sandstone core boring sampling.
3. inhibiting the method for Red Sandstone disintegration as claimed in claim 2, it is characterised in that: the coolant liquid is aqueous solution.
4. the method according to claim 1 for inhibiting Red Sandstone disintegration, it is characterised in that: anionic surfactant is water-soluble
In liquid, the concentration expressed in percentage by weight of anionic surfactant is 10 ~ 20%.
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| CN106675530B true CN106675530B (en) | 2019-01-22 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2005130449A (en) * | 2005-09-30 | 2007-04-10 | Открытое акционерное общество "Северо-Кавказский научно-исследовательский проектный институт природных газов" Открытого акционерного общества "Газпром" (ОАО "СевКавНИПИгаз" ОАО "Газпром") (RU) | COMPOSITION FOR TEMPORARY INSULATION OF THE LAYER |
| CN103627373A (en) * | 2013-12-05 | 2014-03-12 | 湖南大学 | Coolant capable of inhibiting anchor rod drill hole collapse in red sandstone zone |
| CN103755318A (en) * | 2014-01-03 | 2014-04-30 | 上海市基础工程集团有限公司 | Underground diaphragm wall grooving wall-protection slurry and method in red sandstone pebble bed |
| CN105255470A (en) * | 2015-11-10 | 2016-01-20 | 西南石油大学 | Composite nanometer SiO<2> pressure-lowering and injection-augmenting agent and preparation method thereof |
| CN105505344A (en) * | 2015-12-01 | 2016-04-20 | 中国石油天然气股份有限公司 | Method for improving shale well wall stability by controlling wettability of water-based drilling fluid |
-
2016
- 2016-12-16 CN CN201611173694.4A patent/CN106675530B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2005130449A (en) * | 2005-09-30 | 2007-04-10 | Открытое акционерное общество "Северо-Кавказский научно-исследовательский проектный институт природных газов" Открытого акционерного общества "Газпром" (ОАО "СевКавНИПИгаз" ОАО "Газпром") (RU) | COMPOSITION FOR TEMPORARY INSULATION OF THE LAYER |
| CN103627373A (en) * | 2013-12-05 | 2014-03-12 | 湖南大学 | Coolant capable of inhibiting anchor rod drill hole collapse in red sandstone zone |
| CN103755318A (en) * | 2014-01-03 | 2014-04-30 | 上海市基础工程集团有限公司 | Underground diaphragm wall grooving wall-protection slurry and method in red sandstone pebble bed |
| CN105255470A (en) * | 2015-11-10 | 2016-01-20 | 西南石油大学 | Composite nanometer SiO<2> pressure-lowering and injection-augmenting agent and preparation method thereof |
| CN105505344A (en) * | 2015-12-01 | 2016-04-20 | 中国石油天然气股份有限公司 | Method for improving shale well wall stability by controlling wettability of water-based drilling fluid |
Non-Patent Citations (1)
| Title |
|---|
| I类红砂岩崩解性抑制措施试验研究;刘晓明 等;《公路交通科技》;20110331;第28卷(第3期);第25-29页 |
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