CN103570318B - Curing material for drilling waste slurries as well as method thereof for curing drilling waste slurries - Google Patents
Curing material for drilling waste slurries as well as method thereof for curing drilling waste slurries Download PDFInfo
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- CN103570318B CN103570318B CN201310506661.7A CN201310506661A CN103570318B CN 103570318 B CN103570318 B CN 103570318B CN 201310506661 A CN201310506661 A CN 201310506661A CN 103570318 B CN103570318 B CN 103570318B
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- drilling waste
- waste mud
- waste slurries
- drilling
- curing
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Abstract
The invention relates to a curing material for drilling waste slurries. The curing material consists of the following components in percentage by weight: 55-60% of SiO2 and 40-45% of Al2O3 based on sum of percent by weight of 100%. The method for curing drilling waste slurries by using the curing method comprises the following steps: fully mixing SiO2 and Al2O3 to prepare the curing material; pouring the drilling waste slurries, coal ash, a coagulant and the curing material into a pre-opened pit slot to add water and stir; and piling up for 1-2 hours and paving on a pavement to grind and maintain for 24-48 hours. SiO2 and Al2O3 in the curing material for the drilling waste slurries hydrated are subjected to alkaline excitation by Ca(OH)2 in the drilling waste slurries to generate a C-S-H gel and hydrated calcium aluminate matters. The hydrated calcium aluminate matters are further subjected to excitation of sulfate such as blanc fixe in the drilling waste slurries to generate a single sulphur type hydrated calcium aluminate product so as to improve the gel components and the hardening quality of the waste slurries.
Description
Technical field
The invention belongs to field use technical field of chemistry, be specifically related to a kind of drilling waste mud solidify material, the invention still further relates to a kind of method utilizing this solidify material to solidify drilling waste mud.
Background technology
When drilling waste mud is oil drilling in order to lubrication drill bit, carry drilling cuttings, balance down-hole pressure formed be main component with wilkinite, salt solution etc. and add the gunk of gas chromatography.For Yanchang Oilfield West oil recovery factory, from 1997, about needed every year in recent years to beat all kinds of recovery well, prospect pit, about 600 mouthfuls, inspection chamber, the waste mud of every mouthful of drilling well generation is about 150m
3~ 200m
3, the whole year about produces 1.2 × 10
5m
3drilling waste mud.Major part is all as rubbish emergency burial.The dispersiveness (taking a walk at each drilling well point) existed due to drilling waste mud, disguised (do not resemble sump oil and sewage is more easily intuitively discovered), its prevention and cure of pollution and the comprehensive regulation do not cause the enough attention of people, start late to the research of waste mud reutilization technology.In recent years, people have had deep understanding to drilling waste mud contaminate environment.Drilling waste mud and sump oil, sewage are the same, are one of three large public hazards of field produces.Main manifestations has be drilling waste mud state of nature under be difficult to degraded at three: one, causes surrounding area soil compaction, saline Land, vegetation considerable damage; Two is that drilling waste mud long-term accumulated to penetrate under earth's surface water layer or with rainwater excessive inflow rivers brook, polluted source, harm people's health; Three is that drilling waste mud is deposited in wellsite, takies a large amount of arable land or meadow, makes the soil taken lose use value, become new source of pollution.Current problem anxious to be resolved has been become to the comprehensive regulation of drilling waste mud.
Because drilling waste mud corrodibility is large, be not easy to transport, also experimental stage be in the utilization of drilling waste mud both at home and abroad, still do not possess the condition that industrialization large-scale comprehensive utilizes.From available data, both at home and abroad the general all leading consolidation of waste mud is disposed, and then fully utilize.The U.S., the research of Japan and other countries to concretion technology have the history of more than ten years, and foremost Japanese Chichibu Onoda Cement Corporation consolidation material more than ten that development research has gone out for industrial sludge, high organic soil etc. is planted.Theoretically, after drilling waste mud adds additive and aggregate, just fundamentally can change the character of waste mud through solidification, make it to become the material with certain cement feature.But at present both at home and abroad all untapped go out specially for the solidification material of drilling waste mud, the consolidation material that what waste mud solidification used is all for clay, industrial sludge, slurry curing effect is undesirable.Current Domestic, external having will be applied to the trial of hardening, recovering the aspects such as soil in well site after waste mud solidification, because above-mentioned experiment fundamentally can not solve rain erosion, the problem of mud contaminate environment again, so there is no engineering example so far, waste mud industrialization reutilization technology is still world-class technical barrier.
Summary of the invention
The object of this invention is to provide a kind of drilling waste mud solidify material, what solve that existing waste mud material uses is all cementing material for clay, industrial sludge, the problem that slurry curing effect is undesirable.
Another object of the present invention is to provide a kind of method utilizing above-mentioned solidify material to solidify drilling waste mud.
The technical solution adopted in the present invention is, a kind of drilling waste mud solidify material, composed of the following components by mass percentage, SiO
255% ~ 60%, Al
2o
340% ~ 45%, said components mass percent sum is 100%.
Another technical scheme of the present invention is, utilize above-mentioned solidify material to solidify the method for drilling waste mud, concrete steps are as follows:
Step 1, takes SiO by mass percentage respectively
255% ~ 60%, Al
2o
340% ~ 45%, said components mass percent sum is 100%, by the SiO taken
2and Al
2o
3fully be mixed and made into drilling waste mud solidify material;
Step 2, offers hole groove in advance, pours drilling waste mud, flyash, setting accelerator and drilling waste mud solidify material into hole groove, adds water and stir, and is layered on road surface through rolling maintenance 24 ~ 48h after piling up 1 ~ 2h.
Feature of the present invention is also,
In step 2, the mass ratio of drilling waste mud, flyash, setting accelerator and drilling waste mud solidify material is 1:1.5 ~ 1.7:0.2 ~ 0.5:0.5 ~ 1.
In step 2, setting accelerator is water glass, potassium silicate or Tai-Ace S 150.
The invention has the beneficial effects as follows, drilling waste mud solidify material of the present invention, by by SiO
2and Al
2o
3fully be mixed, SiO
2and Al
2o
3active substance is subject to Ca in drilling waste mud (OH) in aquation
2alkaline excitation, generate C-S-H gel and drated calcium aluminate class material respectively, drated calcium aluminate class material can be subject to again exciting of the material that in drilling waste mud, the sulphate content such as ground barium sulfate is high, generate the products such as the hydrated calcium aluminate sulfate (Aft) of single sulfur type, bonding component and the sclerosis quality of waste mud system can be improved further.
Embodiment
Below in conjunction with embodiment, the present invention is described in detail.
A kind of drilling waste mud solidify material of the present invention, composed of the following components by mass percentage, SiO
255% ~ 60%, Al
2o
340% ~ 45%, said components mass percent sum is 100%.
Drilling waste mud solidify material of the present invention, by by SiO
2and Al
2o
3fully be mixed, SiO
2and Al
2o
3active substance is subject to Ca in drilling waste mud (OH) in aquation
2alkaline excitation, generate C-S-H gel and drated calcium aluminate class material respectively, drated calcium aluminate class material can be subject to again exciting of the material that in drilling waste mud, the sulphate content such as ground barium sulfate is high, generate the products such as the hydrated calcium aluminate sulfate (Aft) of single sulfur type, bonding component and the sclerosis quality of waste mud system can be improved further.
Utilize above-mentioned solidify material to solidify the method for drilling waste mud, concrete steps are as follows:
Step 1, takes SiO by mass percentage respectively
255% ~ 60%, Al
2o
340% ~ 45%, said components mass percent sum is 100%, by the SiO taken
2and Al
2o
3fully be mixed and made into drilling waste mud solidify material;
Step 2, offer hole groove in advance, be that 1:1.5 ~ 1.7:0.2 ~ 0.5:0.5 ~ 1 pours hole groove into by drilling waste mud, flyash, setting accelerator (setting accelerator is water glass, potassium silicate or Tai-Ace S 150) and drilling waste mud solidify material according to mass ratio, adding water and stir, being layered on road surface after piling up 1 ~ 2h through rolling maintenance 24 ~ 48h.
Drilling waste mud is under the booster action of solidify material of the present invention and flyash and setting accelerator, the free water exceeding own wt more than 2 times can be absorbed, accelerate solidify material of the present invention and the ion-exchange chemical reaction between flyash and drilling waste mud, form the ettringite structure of principal crystalline phase with 32 molecular crystal water, impel waste mud rapid coagulation in quite wide temperature range, sclerosis, realize the mechanical strength required for induration.
Drilling waste mud is strong basicity, adds SiO
2and Al
2o
3active substance, is subject to Ca in mud (OH) in aquation
2alkaline excitation, can generate C-S-H gel and drated calcium aluminate class material respectively, its chemical reaction mechanism is:
Active SiO
2+ Ca (OH)
2=CaOSiO
2n
1h
2o
Active A l
2o
3+ Ca (OH)
2=CaOAl
2o
3h
2o
Be subject to the CaOAl that alkaline excitation generates
2o
3h2O, can be subject to again exciting of the high material of the sulphate contents such as ground barium sulfate in waste mud, generate the products such as the hydrated calcium aluminate sulfate (Aft) of single sulfur type, can improve bonding component and the sclerosis quality of waste mud system further, form complex excitation mechanism:
CaOAl
2O
3·H
2O+CaSO
4·2H
2O=CaOAl
2O
3CaSO
4·2H
2O+H
2O
Due to Ca (OH)
2always be not present in mud with materials such as ground barium sulfates, the present invention, when waste mud solidifies, with the addition of a large amount of flyash, Ca (OH) in flyash
2all higher with the content of vitriol, it can be applied in the solidification of waste mud as exciting agent.
The feature high according to drilling waste mud water ratio, when using drilling waste mud solidify material of the present invention to solidify, needs the bibulous material of a large amount of interpolation.Consider cities in China generating and civilianly all will produce a large amount of flyash every year, flyash is also a great problem to the pollution of environment and the comprehensive regulation.Therefore, employ flyash in large quantities when drilling waste mud solidifies, realize the comprehensive regulation of refuse.Flyash is a kind of industrial waste with lateral reactivity, and as exciting, component can impel waste mud to solidify, scleroma for it.Flyash plays the basic role in following 3 in drilling waste mud solidification: (1) active effect: can be used as concrete bonding component, reflect the product generating similar cement CHS gel, but it belongs to low activity mixing material with calcium hydroxide generation secondary; (2) shape effect: be the geometric properties such as general reference fly ash grain pattern, thickness, surfaceness, grating, external and internal compositions, and the effect that the feature such as colourity, density produces in consolidation soil or concrete, it mainly belongs to physical influence; (3) micro aggregate effect: just as fine aggregate, make the cement paste structure of newly mixing that " separating wadding " effect occur, and the tiny microballon of flyash plays filling effect, makes capillary gap " refinement " in slurry body structure.
Drilling waste mud solidify material of the present invention shortens a large amount of engineering times compared with other solidify material, and other solidify material often take condensation cure 5 ~ 7 days, and drilling waste mud solidify material of the present invention is through rolling maintenance 24 ~ 48 hours and can employing.
Embodiment 1
Engineering test scene, well site of oil field road is positioned at the interspaced well working district of group of oil recovery factory five, Yanchang Oilfield West.Basis, former well site, owing to being drenched with rain and the reason such as wind erosion, is damaged comparatively serious.For ease of comparing with new basis, well site of repairing, special in the well site of former damage, basic side outside deepening 2m carries out new well site foundation construction, and height is identical with basis, former well site.The well site foundation area of test section is 11.2m × 2.0m × 0.35m=7.84m
3.Concrete operation step is as follows:
Step 1, takes SiO by mass percentage respectively
255%, Al
2o
345%, said components mass percent sum is 100%, by the SiO taken
2and Al
2o
3fully be mixed and made into drilling waste mud solidify material;
Step 2, offer hole groove in advance, pouring 4.8T drilling waste mud, 8T flyash, 1.4T water glass and 4.2T drilling waste mud solidify material (mass ratio is 1:1.67:0.3:0.8) into hole groove, add water and stir, being layered on road surface after piling up 1h through rolling maintenance 24h.
The road surface that the drilling waste mud utilizing embodiment 1 to solidify is laid, through the observations of nearly 10 months (time span winter), with drilling waste mud and flyash cook major ingredient paving West oil recovery factory recover the oil five groups encryption well site roads, wellblock there is good frost resistance, road surface is without fracture, well site road compactness strengthen reaches more than 0.8MPa, can ensure not need repairing in 3 years ~ 5 years.
Embodiment 2
Step 1, takes SiO by mass percentage respectively
260%, Al
2o
340%, said components mass percent sum is 100%, by the SiO taken
2and Al
2o
3fully be mixed and made into drilling waste mud solidify material;
Step 2, offer hole groove in advance, pouring 4.8T drilling waste mud, 7.2T flyash, 1.92T potassium silicate and 2.88T drilling waste mud solidify material (mass ratio is 1:1.5:0.4:0.6) into hole groove, add water and stir, being layered on road surface after piling up 1.5h through rolling maintenance 36h.
Embodiment 3
Step 1, takes SiO by mass percentage respectively
258%, Al
2o
342%, said components mass percent sum is 100%, by the SiO taken
2and Al
2o
3fully be mixed and made into drilling waste mud solidify material;
Step 2, offer hole groove in advance, pouring 4.8T drilling waste mud, 7.68T flyash, 0.96T pure aluminium silicate and 24T drilling waste mud solidify material (mass ratio is 1:16:02:05) into hole groove, add water and stir, being layered on road surface after piling up 2h through rolling maintenance 48h.
Embodiment 4
Step 1, takes SiO by mass percentage respectively
256%, Al
2o
344%, said components mass percent sum is 100%, by the SiO taken
2and Al
2o
3fully be mixed and made into drilling waste mud solidify material;
Step 2, offer hole groove in advance, pouring 4.8T drilling waste mud, 8.16T flyash, 2.4T water glass and 4.8T drilling waste mud solidify material (mass ratio is 1:1.7:0.5:1) into hole groove, add water and stir, being layered on road surface after piling up 1.8h through rolling maintenance 27h.
Claims (2)
1. utilize drilling waste mud solidify material to solidify the method for drilling waste mud, it is characterized in that, concrete steps are as follows:
Step 1, takes SiO by mass percentage respectively
255% ~ 60%, Al
2o
340% ~ 45%, said components mass percent sum is 100%, by the SiO taken
2and Al
2o
3fully be mixed and made into drilling waste mud solidify material;
Step 2, offers hole groove in advance, pours drilling waste mud, flyash, setting accelerator and drilling waste mud solidify material into hole groove, adds water and stir, and is layered on road surface through rolling maintenance 24 ~ 48h after piling up 1 ~ 2h;
In step 2, the mass ratio of drilling waste mud, flyash, setting accelerator and drilling waste mud solidify material is 1:1.5 ~ 1.7:0.2 ~ 0.5:0.5 ~ 1.
2. the method utilizing drilling waste mud solidify material to solidify drilling waste mud according to claim 1, it is characterized in that, in step 2, setting accelerator is water glass, potassium silicate or Tai-Ace S 150.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310506661.7A CN103570318B (en) | 2013-10-24 | 2013-10-24 | Curing material for drilling waste slurries as well as method thereof for curing drilling waste slurries |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310506661.7A CN103570318B (en) | 2013-10-24 | 2013-10-24 | Curing material for drilling waste slurries as well as method thereof for curing drilling waste slurries |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103570318A CN103570318A (en) | 2014-02-12 |
| CN103570318B true CN103570318B (en) | 2015-06-24 |
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ID=50043118
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|---|---|---|---|
| CN201310506661.7A Expired - Fee Related CN103570318B (en) | 2013-10-24 | 2013-10-24 | Curing material for drilling waste slurries as well as method thereof for curing drilling waste slurries |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108439927A (en) * | 2018-04-11 | 2018-08-24 | 湖北工业大学 | A kind of drilling mud curing materials prepared by wet grinding |
| CN113860840B (en) * | 2021-11-02 | 2022-07-29 | 青岛理工大学 | Roadbed material prepared from waste slurry and application thereof |
| CN115557738A (en) * | 2022-10-24 | 2023-01-03 | 宁夏新大地环保科技工程有限公司 | Roadbed filling material and manufacturing method thereof |
| CN116023107A (en) * | 2022-12-15 | 2023-04-28 | 河北邦业环保科技有限公司 | Quick-drying solid agent for preparing water-based slurry drilling cuttings and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1707028A (en) * | 2002-08-06 | 2005-12-14 | 张杞 | Solid curing agent for making road |
| CN1884155A (en) * | 2006-07-03 | 2006-12-27 | 张明罡 | Curing agent for waste drilling mud and use method therefor |
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2013
- 2013-10-24 CN CN201310506661.7A patent/CN103570318B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1707028A (en) * | 2002-08-06 | 2005-12-14 | 张杞 | Solid curing agent for making road |
| CN1884155A (en) * | 2006-07-03 | 2006-12-27 | 张明罡 | Curing agent for waste drilling mud and use method therefor |
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| CN103570318A (en) | 2014-02-12 |
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