CN108728058A - A kind of drilling fluid inhibitor and its application - Google Patents
A kind of drilling fluid inhibitor and its application Download PDFInfo
- Publication number
- CN108728058A CN108728058A CN201810696752.4A CN201810696752A CN108728058A CN 108728058 A CN108728058 A CN 108728058A CN 201810696752 A CN201810696752 A CN 201810696752A CN 108728058 A CN108728058 A CN 108728058A
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- Prior art keywords
- drilling fluid
- inhibitor
- mass parts
- choline
- amino acid
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- KAAWCDCUKARJEC-UHFFFAOYSA-N CCCC1(C(C)C1)N(C)CC Chemical compound CCCC1(C(C)C1)N(C)CC KAAWCDCUKARJEC-UHFFFAOYSA-N 0.000 description 1
Classifications
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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
- C09K8/02—Well-drilling compositions
- C09K8/03—Specific additives for general use in well-drilling compositions
- C09K8/035—Organic additives
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B7/00—Fertilisers based essentially on alkali or ammonium orthophosphates
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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
- C09K17/00—Soil-conditioning materials or soil-stabilising materials
- C09K17/14—Soil-conditioning materials or soil-stabilising materials containing organic compounds only
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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
- C09K8/02—Well-drilling compositions
- C09K8/03—Specific additives for general use in well-drilling compositions
- C09K8/032—Inorganic additives
-
- 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
- C09K2101/00—Agricultural use
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Soil Sciences (AREA)
- Fertilizers (AREA)
Abstract
The present invention provides a kind of drilling fluid inhibitor and its applications.Inhibitor provided by the invention is in terms of mass parts, including 10~30 mass parts amino acid, 5~10 mass parts choline, 5~20 mass parts potassium sulfates, 5~10 mass parts urea and 5~20 mass parts dicalcium phosphates.The raw material of inhibitor of the present invention is degradable substance, and drilling fluid can be made to have preferable biodegradability.As shown in the embodiment of the invention, drilling fluid BOD/COD values provided by the invention are higher, and up to 52~56, biodegradability is preferable so that inhibitor provided by the invention can be applied in ecological drilling fluid, and performance requirement of the drilling fluid to inhibitor is met.
Description
Technical field
The present invention relates to field of oil drilling more particularly to a kind of drilling fluid inhibitor and its applications.
Background technology
Drilling fluid is a kind of important fluid in drilling engineering, it is directly related to the safety and quality of drilling well.And with
The processing mode of further attention of the people to ecological environment, drilling fluid is buried from the direct emission of early stage, solidification, time till now
It receives and utilizes, drilling fluid develops progressively towards the direction of ecological, environmental protective, and ecological drilling fluid comes into being.
Inhibitor is a kind of important materials in ecological drilling fluid.The drilling cuttings generated in drilling process be easy to cause drilling fluid
Thickening, density increase, and then lead to pressure leakage stratum.Inhibitor in drilling fluid plays inhibited drilling fluid retrogradation, makes brill
The effect that well process can be smoothed out.Common inhibitor includes mainly potassium chloride or polyamine etc. currently on the market.But it is existing
The problem of cannot degrading with the presence of drilling fluid inhibitor in technology, polluting environment.
Invention content
The present invention provides a kind of drilling fluid inhibitor and its applications.Drilling fluid provided by the invention has with inhibitor
The liquable advantage of natural degradation solves the problems, such as that drilling fluid inhibitor cannot degrade in the prior art.
The present invention provides a kind of drilling fluid inhibitor, in terms of mass parts, including following components：
Preferably, the drilling fluid inhibitor includes following components：
Preferably, the amino acid includes glutamic acid, aspartic acid, glycine, asparagine and glutamine.
Preferably, in the amino acid, by the dosage of the glutamic acid in terms of 20~40 mass parts, the aspartic acid is
30~40 mass parts, the glycine are 10~20 mass parts, and the asparagine is 10~20 mass parts, the glutamine
For 10~20 mass parts.
Preferably, the choline includes 2- hydroxy-ns, N, N ,-trimethyl second ammonium and/or choline chloride.
Preferably, when the choline includes 2- hydroxy-ns, N, N, when-trimethyl second ammonium and choline chloride, the 2- hydroxyls-
The mass ratio of N, N, N ,-trimethyl second ammonium and choline chloride is 10~25:20~40.
Preferably, content of beary metal is independently less than in the amino acid, choline, potassium sulfate, urea and dicalcium phosphate
90mg/Kg。
The present invention provides application of the drilling fluid inhibitor in drilling fluid described in above-mentioned technical proposal, the inhibitor
Mass fraction in drilling fluid is 0.5%~3.0%.
Preferably, mass fraction of the inhibitor in drilling fluid is 2.0%~2.5%.
Preferably, the drilling fluid is ecological drilling fluid.
Inhibitor provided by the invention is in terms of mass parts, including 10~30 mass parts amino acid, 5~10 mass parts choline, 5
~20 mass parts potassium sulfates, 5~10 mass parts urea and 5~20 mass parts dicalcium phosphates.Drilling fluid provided by the invention is used
Inhibitor contains a large amount of amido, potassium, calcium plasma, as drilling fluid, has good rejection, disclosure satisfy that drilling fluid
To the requirement of inhibition in drilling process, wellbore stability is improved, prevents mud stone from disperseing.The raw material of inhibitor of the present invention is equal
For degradable substance, it can make drilling fluid that there is preferable biodegradability.As shown in the embodiment of the invention, the present invention provides
Drilling fluid BOD/COD values it is higher, up to 52~56, biodegradability is preferable so that inhibitor provided by the invention can answer
In ecological drilling fluid.
In addition, drilling fluid inhibitor provided by the invention contains the organic matters such as largely beneficial to soil nitrogen, phosphorus, potassium
Ingredient, especially aspartic acid are even more the loss that can further prevent moisture, fertilizer efficiency, are made containing herein described inhibitor
Drilling fluid can be applied to alkaline land improving, improve the fertilizer efficiency of soil.
Specific implementation mode
The present invention provides a kind of drilling fluid inhibitor, in terms of mass parts, including following components：
In the present invention, unless otherwise specified, the commercial goods that all raw materials are well known to the skilled person.
In terms of mass parts, drilling fluid provided by the invention with inhibitor include 10~30 parts of amino acid, preferably 15~25
Part, further preferably 18~23 parts, more preferably 20~22 parts.In the present invention, the amido in the amino acid can neutralize
Clay it is negatively charged and play the role of stabilizing borehole.
In the present invention, the amino acid preferably includes glutamic acid, aspartic acid, glycine, asparagine and glutamy
Amine.In amino acid of the present invention, by glutamic acid in terms of 20~40 mass parts, the aspartic acid is 30~40 mass parts,
The glycine is 10~20 mass parts, and the asparagine is 10~20 mass parts, and the glutamine is 10~20 mass
Part.
In the present invention, in terms of mass parts, the amino acid preferably includes 20~40 parts of glutamic acid, further preferably
25~35 parts, more preferably 30~32 parts.
In the present invention, on the basis of the mass parts of the glutamic acid, the amino acid preferably includes 30~40 mass parts
Aspartic acid, further preferably 32~38 parts, more preferably 34~36 parts.
In the present invention, on the basis of the mass parts of the glutamic acid, the amino acid preferably includes 10~20 mass parts
Glycine, further preferably 12~18 parts, more preferably 14~16 parts.
In the present invention, on the basis of the mass parts of the glutamic acid, the amino acid preferably includes 10~20 mass parts
Asparagine, further preferably 12~18 parts, more preferably 14~16 parts.
In the present invention, on the basis of the mass parts of the glutamic acid, the amino acid preferably includes 10~20 mass parts
Glutamine, further preferably 12~18 parts, more preferably 14~16 parts.
The present invention preferably controls the component of amino acid and dosage within the above range, passes through the amino acid of different molecular weight
Collective effect is conducive to make up the single problem of independent inhibitor inhibition, to make inhibitor provided by the invention have
Preferable rejection.
On the basis of the mass parts of the amino acid, drilling fluid provided by the invention inhibitor includes 5~10 parts of choline,
Preferably 6~9 parts, further preferably 7~8 parts.
In the present invention, the choline preferably includes 2- hydroxy-ns, N, N ,-trimethyl second ammonium and/or choline chloride.Work as institute
It states choline and preferably includes 2- hydroxy-ns, N, N, when-trimethyl second ammonium and choline chloride, the 2- hydroxy-ns, N, N ,-trimethyl second
The mass ratio of ammonium and choline chloride is preferably 10~25:20~40, further preferably 15~20:25~35.The present invention is preferred
Within the above range by the component of choline and dosage control, be conducive to preferably neutralize clay elecrtonegativity, while being adsorbed on clay
Surface reduces effect of the hydrone to clay, and after being configured to drilling fluid, drilling fluid is mixed with soil can be improved N P and K in soil
Content.
On the basis of the mass parts of the amino acid, drilling fluid provided by the invention inhibitor includes 5~20 parts of sulfuric acid
Potassium, preferably 10~15 parts, further preferably 12~14 parts.In the present invention, the potassium ion that the potassium sulfate provides can
It is effectively compressed clay electric double layer thickness, reduces δ current potentials, plays the role of stable rock, after being configured to drilling fluid, drilling fluid and soil
Earth mixes the content that potassium in soil can be improved.
On the basis of the mass parts of the amino acid, drilling fluid provided by the invention inhibitor includes 5~10 parts of urea,
Preferably 6~9 parts, further preferably 7~8 parts.In the present invention, the urea can neutralize clay elecrtonegativity well,
Urea can be adsorbed on clay surface simultaneously, reduce effect of the hydrone to clay, after being configured to drilling fluid, drilling fluid and soil
The content of nitrogen in soil can be improved in mixing.
On the basis of the mass parts of the amino acid, drilling fluid provided by the invention inhibitor includes 5~20 parts of phosphoric acid
Hydrogen dicalcium, preferably 10~15 parts, further preferably 12~14 parts.In the present invention, the calcium in the dicalcium phosphate from
Son can effectively inhibit clay aquation to disperse and the hydration swelling of mud shale, while after being configured to drilling fluid, drilling fluid is mixed with soil
Close the content that phosphorus in soil can be improved.
For the present invention by the composition of drilling fluid inhibitor and dosage control in above range, potassium ion and ammonium ion can be with
The thickness of rock surface diffusion electric double layer is compressed, amino acid and choline can enter clay interlayer inhibition hydrone on this basis
Absorption, under the collective effect of above-mentioned raw materials, inhibitor provided by the invention have preferable rejection, in drilling process
In, it can effectively inhibit shale hydration to expand and disperse pulping, improve borehole wall stability；In addition, the original of inhibitor of the present invention
Material is degradable substance so that inhibitor provided by the invention has the advantages that natural degradation is liquable.
In the present invention, content of beary metal is preferably only in the amino acid, choline, potassium sulfate, urea and dicalcium phosphate
On the spot it is less than 90mg/Kg, is further preferably independently less than 85mg/Kg.The present invention is preferably by amino acid, choline, potassium sulfate, urine
Content of beary metal control within the above range, is conducive to make drilling fluid inhibitor provided by the invention in element and dicalcium phosphate
With lower bio-toxicity, and then is conducive to drilling fluid provided by the invention and uses inhibitor can be as soil conditioner application
In alkaline land improving.
In the present invention, the preparation method of the inhibitor of drilling fluid described in above-mentioned technical proposal preferably includes following steps：
Amino acid, choline, potassium sulfate, urea and dicalcium phosphate are mixed, drilling fluid inhibitor is obtained.
Mixed mode is not particularly limited in the present invention, is using hybrid mode well-known to those skilled in the art
It can.
The present invention provides application of the drilling fluid inhibitor in drilling fluid described in above-mentioned technical proposal.In the present invention
In, mass fraction of the inhibitor in drilling fluid is 0.5%~3.0%, preferably 2.0%~2.5%.The present invention is to institute
Stating the other components other than the inhibitor in drilling fluid does not have particular/special requirement, using well-known to those skilled in the art.
Contain the organic compositions such as largely beneficial to soil nitrogen, phosphorus, potassium in drilling fluid inhibitor provided by the invention,
Especially aspartic acid can be effectively prevented the loss of moisture and fertilizer efficiency so that the drilling fluid containing herein described inhibitor
It can be used for alkaline land improving, improve the fertilizer efficiency of soil.
Below in conjunction with the embodiment in the present invention, the technical solution in the present invention is clearly and completely described.
Embodiment 1：
By 10 mass parts amino acid, 5 mass parts choline, 5 mass parts potassium sulfates, 5 mass parts urea and 5 mass parts phosphoric acid hydrogen
Dicalcium mixes, and obtains drilling fluid inhibitor.
Wherein amino acid is by 20 mass parts glutamic acid, 30 mass parts aspartic acids, 10 mass parts glycine, 10 mass parts days
Winter amide and 10 mass parts glutamine mix.
Wherein choline is 10 by mass ratio:20 2- hydroxy-ns, N, N ,-trimethyl second ammonium and choline chloride mix.
Embodiment 2：
By 30 mass parts amino acid, 10 mass parts choline, 20 mass parts potassium sulfates, 10 mass parts urea and 20 mass parts phosphorus
Sour hydrogen dicalcium mixing, obtains drilling fluid inhibitor.
Wherein amino acid is by 40 mass parts glutamic acid, 40 mass parts aspartic acids, 20 mass parts glycine, 20 mass parts days
Winter amide and 20 mass parts glutamine mix.
Wherein choline is 25 by mass ratio:40 2- hydroxy-ns, N, N ,-trimethyl second ammonium and choline chloride mix.
Embodiment 3：
By 30 mass parts amino acid, 5 mass parts choline, 15 mass parts potassium sulfates, 5 mass parts urea and 5 mass parts phosphoric acid
Hydrogen dicalcium mixes, and obtains drilling fluid inhibitor.
Wherein amino acid is by 40 mass parts glutamic acid, 30 mass parts aspartic acids, 10 mass parts glycine, 10 mass parts days
Winter amide and 20 mass parts glutamine mix.
Wherein choline is 15 by mass ratio:20 2- hydroxy-ns, N, N ,-trimethyl second ammonium and choline chloride mix.
Embodiment 4：
By 15 mass parts amino acid, 7 mass parts choline, 10 mass parts potassium sulfates, 10 mass parts urea and 10 mass parts phosphorus
Sour hydrogen dicalcium mixing, obtains drilling fluid inhibitor.
Wherein amino acid is by 25 mass parts glutamic acid, 35 mass parts aspartic acids, 15 mass parts glycine, 15 mass parts days
Winter amide and 10 mass parts glutamine mix.
Wherein choline is 20 by mass ratio:25 2- hydroxy-ns, N, N ,-trimethyl second ammonium and choline chloride mix.
Comparative example 1：
Using potassium chloride as drilling fluid inhibitor.
Comparative example 2：
Using polyamine as drilling fluid inhibitor.
The rejection of the inhibitor of Examples 1 to 4 and comparative example 1~2 is tested, test method is：It will be light
Water and sodium bentonite are according to 1:20% ratio mixing, obtains base slurry, and 20g inhibitor is added in every liter of base is starched, is mixed
Object, the rheological property of test mixing thing；Then mixture is rolled 16 hours in 100 DEG C of heat, the rheological characteristic of mixture after test rolling
Energy.Test result is as shown in table 1.
The rheological property of the inhibitor of 1 Examples 1 to 4 of table and comparative example 1~2
It is provided by the invention by 1 test result of table it is found that inhibitor provided by the invention can inhibit clay aquation pulping
The mixture viscosity that inhibitor obtains after being mixed with base slurry is smaller, illustrates that inhibitor provided by the invention has preferable inhibition
Energy.
The anti-dilative of the inhibitor of Examples 1 to 4 and comparative example 1~2 is tested, test method is：In 1L water
In be separately added into above-described embodiment 1~4 and the inhibitor wiring solution-forming of comparative example 1~2, by sodium bentonite 2000psi press
After power pushes 10min into cake, it is put into swelling capacity tester, the matched solution of above-mentioned inhibitor is added and is tested, test result
As shown in table 2.
The anti-dilative of the inhibitor of 2 Examples 1 to 4 of table and comparative example 1~2
By 2 test result of table it is found that inhibitor provided by the invention is in sodium bentonite has preferable inhibition bentonite
The ability of aquation pulping, anti-dilative are higher than the anti-dilative of potassium chloride and polyamine inhibitor up to 90% or more.
The property of drilling fluid of the inhibitor composition of Examples 1 to 4 and comparative example 1~2 is tested, test method
For：Fresh water, native powder, potassium carbonate, flow pattern regulator, fluid loss additive, inhibitor, coating agent, anti-collapse sealing agent and barite are mixed
It closes, obtains drilling fluid.Wherein native powder is ecosystem soil, and inhibitor is 1~2 inhibition of above-described embodiment 1~4 and comparative example
Agent, coating agent are macromolecule polyalcohol, and anti-collapse sealing agent is larger molecular organics；In addition, native powder, potassium carbonate, flow pattern regulator,
The mass fraction of fluid loss additive, inhibitor, coating agent, anti-collapse sealing agent and barite in drilling fluid is followed successively by 3.0%,
0.3%, 0.4%, 2.0%, 2.0%, 0.1%, 2.0% and 20%.Test the basic performance of drilling fluid, test result such as table 3
It is shown.
The performance of the drilling fluid of the inhibitor of 3 Examples 1 to 3 of table and comparative example 1~2 composition
In the present invention, the Φ 3 refers to that six fast 3 turns of rotational viscometers are read, dimensionless.
In the present invention, the dehydration of low-pressure low-temperature pressure refers to 0.7MPa, 25 DEG C, the pressure dehydration volume of 30min；It is described
High pressure-temperature pressure dehydration refers to 3.5MPa, 100 DEG C, the pressure dehydration volume of 30min.
In the present invention, the BOD/COD refers to the ratio of BOD and biochemical oxygen demand (BOD) on the 5th on the 5th.
In the present invention, the bio-toxicity is measured using Luminous bacteria.
By 3 test result of table it is found that inhibitor provided by the invention is applied in drilling fluid, wanting for drilling fluid disclosure satisfy that
It asks.And the value of the BOD/COD of inhibitor provided by the invention is higher, up to 52~56, has preferable biological degradability.
The inhibitor of Examples 1 to 4 and comparative example 1~2 tests the improved effect in salt-soda soil, to be not added with
The alkaline land soil of inhibitor is blank, on this basis respectively by inhibitor and alkaline land soil with 10g:The ratio of 1kg is mixed
It closes, obtains mixture, the physicochemical property of test mixing thing.
Improved effect of the inhibitor of 4 Examples 1 to 4 of table and comparative example 1~2 to alkaline land soil
By 4 test result of table it is found that inhibitor provided by the invention can improve soil with organic matter, available nitrogen, effectively
The content of phosphorus and effective potassium, it is possible thereby to illustrate, inhibitor provided by the invention can be used as soil conditioner and apply in salt-soda soil
In improvement.
In conclusion inhibitor provided by the invention has preferable rejection, clay aquation can be effectively inhibited to make
Slurry, and anti-dilative of the inhibitor provided by the invention in sodium bentonite is higher up to 90% or more；In addition, the present invention provides
Inhibitor apply in drilling fluid, disclosure satisfy that the basic demand of drilling fluid；And inhibitor BOD/COD provided by the invention
Value is higher, and biodegradability is preferable, ecological, environmental protective, free from environmental pollution.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (10)
1. a kind of drilling fluid inhibitor, in terms of mass parts, including following components：
2. drilling fluid inhibitor according to claim 1, which is characterized in that the drilling fluid inhibitor includes following
Component：
3. drilling fluid inhibitor according to claim 1 or 2, which is characterized in that the amino acid includes glutamic acid, day
Winter propylhomoserin, glycine, asparagine and glutamine.
4. drilling fluid inhibitor according to claim 3, which is characterized in that in the amino acid, with the glutamic acid
Dosage be 20~40 mass parts meters, the aspartic acid be 30~40 mass parts, the glycine be 10~20 mass parts, institute
It is 10~20 mass parts to state asparagine, and the glutamine is 10~20 mass parts.
5. drilling fluid inhibitor according to claim 1 or 2, which is characterized in that the choline includes 2- hydroxy-ns, N,
N ,-trimethyl second ammonium and/or choline chloride.
6. drilling fluid inhibitor according to claim 5, which is characterized in that when the choline includes 2- hydroxy-ns, N,
N, when-trimethyl second ammonium and choline chloride, the mass ratio of the 2- hydroxy-ns, N, N ,-trimethyl second ammonium and choline chloride is 10
~25:20~40.
7. drilling fluid inhibitor according to claim 1 or 2, which is characterized in that the amino acid, choline, potassium sulfate,
Content of beary metal is independently less than 90mg/Kg in urea and dicalcium phosphate.
8. application of any one of the claim 1~7 drilling fluid inhibitor in drilling fluid, the inhibitor is in drilling fluid
In mass fraction be 0.5%~3.0%.
9. application of the drilling fluid inhibitor in drilling fluid according to claim 8, which is characterized in that the inhibitor exists
Mass fraction in drilling fluid is 2.0%~2.5%.
10. application of the drilling fluid inhibitor in drilling fluid according to claim 8 or claim 9, which is characterized in that the drilling well
Liquid is ecological drilling fluid.
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| CN201810696752.4A CN108728058A (en) | 2018-06-29 | 2018-06-29 | A kind of drilling fluid inhibitor and its application |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111040742A (en) * | 2019-12-13 | 2020-04-21 | 中国石油大学(北京) | Shale inhibitor and preparation method thereof, drilling fluid and application thereof |
| CN111205833A (en) * | 2019-11-28 | 2020-05-29 | 中国海洋石油集团有限公司 | Environment-friendly inhibitor for drilling fluid and preparation method thereof |
| CN113444502A (en) * | 2021-08-09 | 2021-09-28 | 长江大学 | Multifunctional liquid for well drilling, drilling fluid for shale gas and preparation method and application thereof |
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