CN115849772A - Geopolymer curing agent for water-based drilling cuttings and treatment method thereof - Google Patents
Geopolymer curing agent for water-based drilling cuttings and treatment method thereof Download PDFInfo
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- CN115849772A CN115849772A CN202111117159.8A CN202111117159A CN115849772A CN 115849772 A CN115849772 A CN 115849772A CN 202111117159 A CN202111117159 A CN 202111117159A CN 115849772 A CN115849772 A CN 115849772A
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- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 50
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- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 claims abstract description 11
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- 239000002245 particle Substances 0.000 claims description 12
- 239000003822 epoxy resin Substances 0.000 claims description 9
- 229920000647 polyepoxide Polymers 0.000 claims description 9
- 239000003129 oil well Substances 0.000 claims description 8
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- 229910052905 tridymite Inorganic materials 0.000 claims description 2
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 claims 2
- 239000002699 waste material Substances 0.000 abstract description 15
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- 239000000047 product Substances 0.000 description 4
- 239000000292 calcium oxide Substances 0.000 description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 239000010881 fly ash Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
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- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
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- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 1
- 239000010775 animal oil Substances 0.000 description 1
- 238000003321 atomic absorption spectrophotometry Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
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- YGANSGVIUGARFR-UHFFFAOYSA-N dipotassium dioxosilane oxo(oxoalumanyloxy)alumane oxygen(2-) Chemical compound [O--].[K+].[K+].O=[Si]=O.O=[Al]O[Al]=O YGANSGVIUGARFR-UHFFFAOYSA-N 0.000 description 1
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Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention provides a geopolymer curing agent for water-based drill cuttings and a treatment method thereof, wherein the curing agent is counted by mass and comprises the following components: 40-50 parts of crushed drill cuttings, 30-40 parts of slag, 5-10 parts of silica fume, 5-10 parts of water glass and 5-10 parts of chemical treatment agent DH-2. According to the advantages of geopolymer materials, namely high early strength, good durability and thermal stability, a solidified raw material mainly comprising geopolymer material slag and silica fume is developed, and a chemical treating agent DH-2 is added to better seal heavy metal ions and the like in drill cuttings; and the treatment method is provided, and the formed slurry is injected into the abandoned well through the single-screw pump, so that the reutilization of the waste on well cementation is realized. The safety is enhanced, and the pollution of rock debris is reduced.
Description
Technical Field
The invention relates to a treatment curing agent and a treatment method, in particular to a geopolymer treatment curing agent and a method for water-based mud drill cuttings, and belongs to the technical field of oil and gas field drilling environment protection.
Background
In order to meet the requirements of inhibitive performance, blocking performance, lubricating performance and reservoir protection function in complex formation conditions, the drilling fluid has complex components and often contains amine-based or aluminum-based inhibitors, filtrate reducers, coating agents, lubricants and other components. The drill cuttings are difficult to treat, the conventional curing agent is difficult to achieve a good treatment effect, the strength of the cured product does not meet the requirement, and the resource value is not realized.
The current state of the art includes the following curing agents or curing methods:
(1) Curing agent for well drilling debris treatment and application thereof (CN 201610841841.4): the curing agent comprises cement and metallurgical slag, wherein the proportion of the cement is 30-70wt%. The curing process flow comprises the steps of removing impurities in the drilling cuttings, then carrying out air drying treatment, adding the curing agent into the drilling cuttings, uniformly stirring, adding water, and uniformly stirring to obtain mixture slurry. And loading the mixture into a mold for molding and solidifying, and then demolding and maintaining to obtain a high-strength solidified body. The disadvantages are that: the cement is applied, and the proportion is high.
(2) Curing agent for sulfonated drilling cuttings treatment and application thereof (CN 201810502291.2): the curing agent is prepared by mixing microcrystalline muscovite, calcium-based montmorillonite and fly ash serving as main raw materials with 32.5# Portland cement, aluminum sulfate and an interface regulator as auxiliary materials; the curing agent is used for curing sulfonated drilling cuttings. The disadvantages are as follows: portland cement is used.
(3) Drilling rock debris waste curing and stabilizing technology research (applied chemical industry, 2017, (08) 1545-1548+ 1552): through the research idea of treating waste by waste, on the premise that cement is used as a curing agent, blast furnace slag is added, and the influence of experimental factors such as the addition amount of the cement, the addition amount of the blast furnace slag, the addition amount of rock debris, the addition amount of water and the like on the strength of the cured body and the leaching toxicity is researched by adopting an experimental method of uniformly mixed materials. The disadvantages are that: no effective chemical additives are used to reduce the environmental impact of debris toxicity.
(4) Study of curing agent in oilfield waste drilling fluid, cuttings (chemical management 2016, (20) 176): the curing agent is prepared from 10% of cement, 30% of fly ash, 2% of calcium oxide, 2% of XC-I and 3% of XC-II, and has good curing effect on 13-well rock debris. After the rock debris is treated by the curing agent, the indexes of COD, pH and petroleum reach the discharge requirement of solid waste, and no secondary pollution is generated. The disadvantages are that: the treated waste is not reused.
The existing related solidified rock debris material system can generally contain industrial waste, so that the resource utilization is achieved to a certain degree, but the industrial waste cannot be completely used as a main curing agent material, and the full reutilization of waste is not achieved.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention provides a curing agent for treating water-based slurry drilling cuttings, which has the advantages of low addition amount, good curing effect and strong applicability, and provides a curing treatment method.
The technical scheme of the invention is as follows:
the geopolymer curing agent for the water-based drill cuttings is characterized by comprising the following components in percentage by mass:
40-50 parts of crushed drill cuttings, 30-40 parts of slag, 5-10 parts of silica fume, 5-10 parts of water glass and 5-10 parts of chemical treatment agent DH-2.
Preferably, the chemical treatment agent DH-2 is dopamine and epoxy resin, and the mass ratio of the dopamine to the epoxy resin is 2:1.
preferably, the mass ratio of the slag, the silica fume and the drill cuttings is 1:1, the using amount of water is 40-50 parts.
Further preferably, the water is tap water.
Preferably, the dopamine is polydopamine.
Preferably, the epoxy resin is a bisphenol a type epoxy resin.
Preferably, the modulus of the water glass is 2.0, and the effective content is 75%.
Preferably, the slag has a particle size of 200-300 mesh, siO 2 40-45% of Al 2 O 3 15 to 20 percent of CaO and 40 to 45 percent of CaO.
Preferably, the particle size of the silica fume is 200-300 meshes, and the content of SiO2 accounts for 90% -95%.
The method for treating the geopolymer curing agent for the water-based drill cuttings is characterized by comprising the following steps of:
pretreatment: separating drill cuttings in the drilling fluid by using a stirring device, and crushing by using a rock crusher to obtain drill cuttings with the particle size not larger than 10 meshes for standby treatment;
fully dissolving water glass and water in a stirring vehicle, cooling to normal temperature, transferring the treated drill cuttings, geopolymer material slag and silica fume into a cement stirring vehicle, stirring for 5 minutes, adding a chemical treatment agent DH-2 into the cement stirring vehicle, and continuously stirring for 5 minutes to form slurry;
the slurry is put into a abandoned well by a single-screw pump with the allowable particle diameter of more than 2mm, and is injected into a 10-15 m oil well cement plug at the upper layer for sealing.
The invention has the following technical effects:
the invention relates to a geopolymer treatment curing agent for water-based slurry drilling cuttings and a method thereof, wherein a curing raw material mainly comprising geopolymer material slag and silica fume is developed according to the advantages of geopolymer materials, namely high early strength, good durability and thermal stability, and a chemical treatment agent DH-2 is added to better seal heavy metal ions and the like in the drilling cuttings; and the treatment method is provided, and the formed slurry is injected into the abandoned well through the single-screw pump, so that the reutilization of the waste on well cementation is realized. The safety is enhanced, and the pollution of rock debris is reduced.
In the treatment curing agent, the slag and the chemical treatment agent DH-2 are main treatment agents, and by utilizing the characteristics of industrial waste residues, the treatment curing agent can generate gelled substances to cement clay particles under the alkaline condition of water glass, so that the surfaces of the clay particles and the contact points of the particles form irreversible gelation to form the gelled substances. The dopamine is used for complexing, precipitating and sealing organic matters, petroleum, heavy metals and the like in the high-performance water-based slurry drilling cuttings, so that the gelled substances are more densified. The epoxy resin as an adhesive can make the reaction more quickly solidified by utilizing the good adhesive property of the epoxy resin. Accelerating and exciting dopamine and SiO in silica fume 2 The components undergo a curing reaction.
Aiming at the problem that the water-based drilling fluid containing the additives such as amine-based or aluminum-based inhibitors is difficult to process, the processing curing agent and the processing method provided by the invention are simple and applicable, the strength of the block obtained after curing meets the requirement, and the detection content of the precipitated liquid meets the first-grade emission requirement.
The invention completely takes industrial waste as a main curing agent, mixes and stirs the drill cuttings and geopolymer materials, and injects the mixture into the waste underground for cementing and sealing, thereby reducing the pollution of the drill cuttings to the environment, reinjecting the waste well, having good effect and achieving the reutilization of the waste.
Compared with the prior art, the main component of the curing agent does not contain silicate cement, so that complete 'treatment of waste by waste' is achieved, the resource utilization degree is higher, and the environmental protection performance reaches the standard; the slag with higher activity than that of the fly ash is used, the treatment method is simple, and the pH of the precipitation liquid reaches the standard. The compressive strength of 8h in the normal temperature environment can reach about 3.8MPa, which is nearly twice of the G-grade cement requirement of an oil well. The content of free liquid is low, and COD, petroleum, heavy metals, chromaticity and the like all meet the first-level requirements of GB8978-1996 national Integrated wastewater discharge Standard.
The invention is mainly used for protecting the drilling environment of oil and gas fields, can achieve the aim of recycling drill cuttings by treating wastes with processes of wastes against one another while ensuring the harmless treatment of cured products, and obviously has better application and popularization prospects.
Detailed Description
In order that the invention may be better understood, the invention will now be further explained with reference to specific examples.
Example 1
Pretreatment: and separating drill cuttings in the drilling fluid by using a stirring device, and crushing by using a 2FS 600X 400 rock crusher to obtain the drill cuttings with the size of not more than 10 meshes for standby treatment.
Fully dissolving instant water glass (the weight is about 1/5 of the weight of the drill cuttings obtained by treatment) and water with the same weight as the drill cuttings in a stirring vehicle, cooling to normal temperature, transferring the treated high-performance water-based drill cuttings of the shale gas area of a certain oil field and a geopolymer material (slag: silica fume = 4).
The flowing slurry was immediately run down into a abandoned well using a G25 single screw pump (allowing a particle diameter of 2mm, i.e. around 10 mesh) and cemented in the upper layer into a 15m oil well grade G cement plug.
Example 2
Fully dissolving instant water glass (the weight is about 1/5 of the weight of the drill cuttings obtained by treatment) and water with the same weight as the drill cuttings in a stirring vehicle, cooling to normal temperature, transferring the treated high-performance water-based drill cuttings of the shale gas area of a certain oil field and a geopolymer material (slag: silica fume = 3).
The flowing slurry was immediately lowered into the abandoned well using a G30 single screw pump (allowing a particle diameter of 2.5mm, i.e. around 8 mesh) and cemented in the upper layer into a 15m well grade G cement plug.
(1) Evaluation of flow Properties
The fluidity should be not less than 18cm.
(2) Evaluation of compressive Strength
The compressive strength of the test block cured for 8 hours is mainly analyzed. The strength is 2.1MPa according to the minimum requirement of G grade 8h of an oil well of a cement compression standard GB10238-2005 physical performance standard.
(3) Evaluation of free liquid
The cement paste is directly poured into a clean and dry 250mL glass measuring cylinder to reach 250mL scale marks, and a preservative film is used for sealing to prevent moisture volatilization. After standing for 2h under the condition of no vibration, removing supernatant liquid (colored or colorless liquid on the top of the cement paste) by using a pipette or a syringe. The volume of the supernatant was measured and recorded to 0.1mL. Then, the volume fraction φ of the free liquid was calculated as follows, and expressed in "%".
Phi represents the volume fraction of the free liquid,%;
V F free liquid volume in milliliters (mL);
vs-cement slurry volume in milliliters (mL).
The free liquid content of the cement is not more than 5.90% according to the standard GB/T10238-2015G level oil well cement.
(4) Evaluation of contamination characteristics of cured product
When the content of the free liquid is mainly measured, heavy metals, petroleum, CODcr, chromaticity, pH value and the like in the precipitated liquid are measured. All according to the corresponding national standard or line standard method: heavy metal detection is carried out according to GB7475-87 atomic absorption spectrophotometry for measuring copper, zinc, lead and cadmium in water; petroleum detection is carried out according to GB/T16488-1996 determination of water quality petroleum and animal and vegetable oil, CODcr detection is carried out according to HJ/T399-2007 chemical oxygen demand determination rapid digestion spectrophotometry, chromaticity detection is carried out according to GB11903-89 determination of water quality chromaticity, and pH value detection is carried out according to GB/T6920-86 determination of water quality pH value glass electrode method.
TABLE 1 evaluation results of flowability
| Item | Example 1 | Example 2 | Standard of merit |
| Fluidity (cm) | 19.2 | 18.6 | ≥18 |
Tests show that the minimum fluidity requirement of the well cementation cement slurry is met.
TABLE 2 evaluation results of compression strength of test pieces treated with treatment curing agent
| Item | Example 1 | Example 2 | Standard of merit |
| Compressive strength (MPa) | 3.9 | 3.7 | ≥2.1 |
Tests show that the minimum compressive strength requirement of oil well G-grade cement at normal temperature and pressure for 8 hours is met.
TABLE 3 evaluation of the free solution
| Item | Example 1 | Example 1 | Standard of merit |
| Content of free liquid (%) | 0.5 | 0.7 | ≤5.9 |
Tests show that the free liquid content of the G-grade cement of the oil well can not exceed 5.90 percent.
TABLE 4 test results of the eluate
| Item | Example 1 | Example 2 | Standard of reference |
| CODcr(mg/L) | 46.7 | 48.6 | ≤100 |
| Color intensity | 7 | 8 | ≤50 |
| pH value | 8.5 | 8.5 | 6～9 |
| Petroleum products (mg/L) | 0.33 | 0.42 | ≤5 |
| Cr(mg/L) | 0.12 | 0.27 | ≤1.5 |
| Cd(mg/L) | 0.03 | 0.05 | ≤0.1 |
| Pb(mg/L) | Not detected out | Not detected out | ≤1.0 |
| As(mg/L) | Not detected out | Not detected out | ≤0.5 |
| Hg(mg/L) | Not detected out | Undetected | ≤0.05 |
| Zn(mg/L) | Not detected out | Not detected out | ≤2.0 |
As can be seen from Table 4, the main environmental protection indexes of the precipitation liquid of the cured product prepared by the treatment of the treating agent of the embodiment, namely CODcr, petroleum, heavy metals, chromaticity and the like, all meet the first-level requirements of GB8978-1996 national Integrated wastewater discharge Standard.
It is pointed out here that the above description is helpful for the person skilled in the art to understand the content of the invention, but does not limit the scope of protection of the invention. Any and all equivalents, modifications, and/or omissions to the system described above may be made without departing from the spirit of the present invention.
Claims (10)
1. The geopolymer curing agent for the water-based drill cuttings is characterized by comprising the following components in percentage by mass:
40-50 parts of crushed drill cuttings, 30-40 parts of slag, 5-10 parts of silica fume, 5-10 parts of water glass and 5-10 parts of chemical treatment agent DH-2.
2. The curing agent according to claim 1, wherein the chemical treatment agent DH-2 is dopamine and epoxy resin, and the mass ratio is 2:1.
3. the curing agent according to claim 1, wherein the mass ratio of the slag and silica fume to the drill cuttings is 1:1, and the water is used in an amount of 40-50 parts.
4. The curing agent according to claim 3, wherein the water is tap water.
5. The curing agent according to claim 1, wherein the dopamine is polydopamine.
6. The curing agent according to claim 1, wherein the epoxy resin is a bisphenol A type epoxy resin.
7. The curing agent according to claim 1, wherein the water glass has a modulus of 2.0 and an effective content of 75%.
8. The curing agent according to claim 1, wherein the fused slag has a particle size of 200-300 mesh, siO 2 40-45% of Al 2 O 3 15 to 20 percent of CaO and 40 to 45 percent of CaO.
9. The curing agent according to claim 1, wherein the silica fume has a particle size of 200-300 mesh and a SiO2 content of 90-95%.
10. The method of any one of claims 1-9 for the treatment of geopolymer curatives for water-based drill cuttings, comprising the steps of:
pretreatment: separating drill cuttings in the drilling fluid by a stirring device, and crushing by a rock crusher to obtain drill cuttings with a size of not more than 10 meshes for standby treatment;
fully dissolving water glass and water in a stirring vehicle, cooling to normal temperature, transferring the treated drill cuttings, geopolymer material slag and silica fume to a cement stirring vehicle, stirring for 5 minutes, adding a chemical treatment agent DH-2 into the cement stirring vehicle, and continuously stirring for 5 minutes to form slurry;
the slurry is put into a abandoned well by a single-screw pump with the allowable particle diameter of more than 2mm, and is injected into a 10-15 m oil well cement plug at the upper layer for sealing.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117700186A (en) * | 2024-02-06 | 2024-03-15 | 山东省地质矿产勘查开发局第二水文地质工程地质大队(山东省鲁北地质工程勘察院) | Underwater non-dispersed cement paste for drilling and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105925254A (en) * | 2016-06-22 | 2016-09-07 | 西南石油大学 | Well-cementation working fluid system prepared from waste drilling fluid and drill cuttings |
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2021
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| CN105925254A (en) * | 2016-06-22 | 2016-09-07 | 西南石油大学 | Well-cementation working fluid system prepared from waste drilling fluid and drill cuttings |
| 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 |
| CN108947426A (en) * | 2018-08-30 | 2018-12-07 | 青岛理工大学 | A kind of epoxy resin modification alkali-activated carbonatite base mending mortar and preparation method thereof |
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| CN117700186A (en) * | 2024-02-06 | 2024-03-15 | 山东省地质矿产勘查开发局第二水文地质工程地质大队(山东省鲁北地质工程勘察院) | Underwater non-dispersed cement paste for drilling and preparation method thereof |
| CN117700186B (en) * | 2024-02-06 | 2024-04-19 | 山东省地质矿产勘查开发局第二水文地质工程地质大队(山东省鲁北地质工程勘察院) | Underwater non-dispersed cement paste for drilling and preparation method thereof |
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