CN107312511A - A kind of drilling fluid surfactant, its preparation method and drilling fluid - Google Patents
A kind of drilling fluid surfactant, its preparation method and drilling fluid Download PDFInfo
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- CN107312511A CN107312511A CN201610274086.6A CN201610274086A CN107312511A CN 107312511 A CN107312511 A CN 107312511A CN 201610274086 A CN201610274086 A CN 201610274086A CN 107312511 A CN107312511 A CN 107312511A
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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
- C09K8/38—Gaseous or foamed well-drilling compositions
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C233/00—Carboxylic acid amides
- C07C233/01—Carboxylic acid amides having carbon atoms of carboxamide groups bound to hydrogen atoms or to acyclic carbon atoms
- C07C233/45—Carboxylic acid amides having carbon atoms of carboxamide groups bound to hydrogen atoms or to acyclic carbon atoms having the nitrogen atom of at least one of the carboxamide groups bound to a carbon atom of a hydrocarbon radical substituted by carboxyl groups
- C07C233/46—Carboxylic acid amides having carbon atoms of carboxamide groups bound to hydrogen atoms or to acyclic carbon atoms having the nitrogen atom of at least one of the carboxamide groups bound to a carbon atom of a hydrocarbon radical substituted by carboxyl groups with the substituted hydrocarbon radical bound to the nitrogen atom of the carboxamide group by an acyclic carbon atom
- C07C233/47—Carboxylic acid amides having carbon atoms of carboxamide groups bound to hydrogen atoms or to acyclic carbon atoms having the nitrogen atom of at least one of the carboxamide groups bound to a carbon atom of a hydrocarbon radical substituted by carboxyl groups with the substituted hydrocarbon radical bound to the nitrogen atom of the carboxamide group by an acyclic carbon atom having the carbon atom of the carboxamide group bound to a hydrogen atom or to a carbon atom of an acyclic saturated carbon skeleton
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C309/00—Sulfonic acids; Halides, esters, or anhydrides thereof
- C07C309/01—Sulfonic acids
- C07C309/02—Sulfonic acids having sulfo groups bound to acyclic carbon atoms
- C07C309/03—Sulfonic acids having sulfo groups bound to acyclic carbon atoms of an acyclic saturated carbon skeleton
- C07C309/13—Sulfonic acids having sulfo groups bound to acyclic carbon atoms of an acyclic saturated carbon skeleton containing nitrogen atoms, not being part of nitro or nitroso groups, bound to the carbon skeleton
- C07C309/14—Sulfonic acids having sulfo groups bound to acyclic carbon atoms of an acyclic saturated carbon skeleton containing nitrogen atoms, not being part of nitro or nitroso groups, bound to the carbon skeleton containing amino groups bound to the carbon skeleton
- C07C309/15—Sulfonic acids having sulfo groups bound to acyclic carbon atoms of an acyclic saturated carbon skeleton containing nitrogen atoms, not being part of nitro or nitroso groups, bound to the carbon skeleton containing amino groups bound to the carbon skeleton the nitrogen atom of at least one of the amino groups being part of any of the groups, X being a hetero atom, Y being any atom
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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
Abstract
The invention provides a kind of drilling fluid surfactant and preparation method thereof, this method is reacted alkyl acyl halide compound with amino-compound in the basic conditions, obtains drilling fluid surfactant；The drilling fluid surfactant has Formulas I structure；In Formulas I, R1It is C selected from formulanH2n+1Straight chained alkyl or formula be CmH2m‑1Straight chained alkyl, n be 10~22 integer, m be 20~22 integer；R2For methyl or ethyl；R3For (CH2)t, t is 1~3 integer；Z is COONa, COOK, SO3Na or SO3K.The invention provides a kind of drilling fluid, including foaming agent, it is above-mentioned surfactant.Above-mentioned surfactant has good sealing function to air core in microvesicle, and the stability and resistance to compression of microvesicle are strong, can guarantee that micro-foam drilling fluid has relatively low circulating density under the high pressure of shaft bottom, reduce underground complicated.
Description
Technical field
The present invention relates to oilfield chemical auxiliary technical field, more particularly to a kind of drilling fluid surfactant,
Its preparation method and drilling fluid.
Background technology
Oil field at home in low pressure or during owing (or near) balanced drilling, often using foam drilling fluid come
Reduce density, it is ensured that wellbore construction safety.But, regular-type foam particle diameter is big, has a strong impact on slush pump
Upper water efficiency, and need the equipment such as compressor of supporting injection gas, and production and injection gas
Equipment etc., drilling cost is higher.For these problems, some domestic oil fields, which have successively been carried out, is closely putting down
The correlative study of the recyclable micro-foam drilling fluid used under the conditions of weighing apparatus.Micro-foam drilling fluid has density low, existing
The equipment that field injects gas without addition, can effectively prevent broken low pressure, high permeability sandstone and Fractured
Formation leakage is missed, reservoir protec-tion reduces the advantages such as drilling cost.
At present, prior art discloses a variety of micro-foam drilling fluids, and the core of micro-foam drilling fluid is to be used for
Form the surfactant of microvesicle.Such as, the Chinese patent literature of Application No. 200910157353.1 is public
A kind of micro-foam drilling fluid is opened, it includes 3~5 grams of composite foamable agent, and the composite foamable agent is by 12
Sodium alkyl sulfate and neopelex in mass ratio 7:3 compositions.Application No. 200710113558.0
Chinese patent literature disclose a kind of high temperature resistant circulating micro-foam drilling fluid or completion fluid, it includes 2~5
The high-temperature foaming agent of parts by weight, the high-temperature foaming agent uses fatty alcohol glyceryl ether sulfonates AGES, gathered
Close alcohol, coconut oleamide sulfosuccinic acid monoesters sodium salt F873=6~10:2~5:The composition of 6~10 ratios；
And also include the high temperature foam stabilizer of 1~2.5 parts by weight.
In above two micro-foam drilling fluid, what foaming agent was used is all the combination of conventional surfactant, this
Sample is poor to air core sealing in microvesicle, and the stability and resistance to compression of microvesicle are not enough, in shaft bottom high pressure
Under the conditions of, air can be diffused out from foam, so that cause drilling fluid shaft bottom density significantly to raise, shadow
Ring wellbore construction safety.
The content of the invention
In view of this, the application provides a kind of drilling fluid surfactant, its preparation method and drilling fluid,
The surfactant that the present invention is provided has good sealing function, microvesicle to air core in drilling fluid microvesicle
Stability and microvesicle resistance to compression it is strong, can guarantee that micro-foam drilling fluid has under the high pressure of shaft bottom relatively low
Circulating density, reduces down hole problem.
The present invention provides a kind of drilling fluid surfactant, with Formulas I general structure：
In Formulas I, R1It is C selected from formulanH2n+1Straight chained alkyl or formula be CmH2m-1Straight chained alkyl,
N is selected from the integer between 10~22, and m is selected from the integer between 20~22；
R2For methyl or ethyl；
R3For-(CH2)t-, t is selected from the integer between 1~3；
Z is-COONa ,-COOK ,-SO3Na or-SO3K。
Preferably, n is 11,13,15,17,19 or 21；M is 21.
The present invention provides a kind of preparation method of drilling fluid surfactant, comprises the following steps：
Alkyl acyl halide compound is reacted in the basic conditions with amino-compound, drilling fluid use is obtained
Surfactant；The alkyl acyl halide compound has Formula II structure：
The amino-compound has formula III structure：
R2-NH-R3- Z formula IIIs；
The drilling fluid surfactant has Formulas I structure：
Wherein, R1It is C selected from formulanH2n+1Straight chained alkyl or formula be CmH2m-1Straight chained alkyl, n
Integer between 10~22, m is selected from the integer between 20~22；X is halogen；
R2For methyl or ethyl；R3For-(CH2)t-, t is selected from the integer between 1~3；Z be-COONa,
-COOK、-SO3Na or-SO3K。
Preferably, the alkyl acyl halide compound is selected from dodecane acyl chlorides, myristyl chloride, hexadecanoyl
It is any in chlorine, stearyl chloride, eicosane acyl chlorides, docosane acyl chlorides, oleoyl chloride and erucic acid acyl chlorides
It is a kind of.
Preferably, alkyl acyl halide compound and alkaline aqueous solution are added in the amino-compound aqueous solution simultaneously,
Reacted, obtain drilling fluid surfactant；The alkaline aqueous solution is sodium hydroxide solution, institute
The mol ratio for stating sodium hydroxide and alkyl acyl halide compound in sodium hydroxide solution is 0.9~1.1:1.
Preferably, the mode of the addition is dropwise addition；It is 0.5h~5h, completion of dropwise addition to control the time being added dropwise
After be stirred for 0.3h~0.6h, obtain drilling fluid surfactant.
The present invention provides a kind of drilling fluid, including foaming agent, and the foaming agent has Formulas I general structure：
In Formulas I, R1It is C selected from formulanH2n+1Straight chained alkyl or formula be CmH2m-1Straight chained alkyl,
N is selected from the integer between 10~22, and m is selected from the integer between 20~22；
R2For methyl or ethyl；
R3For-(CH2)t-, t is selected from the integer between 1~3；
Z is-COONa ,-COOK ,-SO3Na or-SO3K。
Preferably, n is 11,13,15,17,19 or 21；M is 21.
Preferably, the dosage of the foaming agent is 0.8~1.5wt%.
Preferably, the drilling fluid includes：3~5wt% bentonite slurries, 0.8~1.5wt% foaming agents,
0.1~1wt% xanthans, 0.5~2wt% sodium carboxymethylcelluloses and 1~3wt% potassium chloride.
Compared with prior art, the surfactant that the present invention is provided has Formulas I general structure, its foaminess
Can be good；During for drilling fluid, the foam of formation has more preferable stability and resistance to compression, to drilling well
Air core has good sealing function in liquid microvesicle, can guarantee that micro-foam drilling fluid has under the high pressure of shaft bottom
Relatively low circulating density, reduces down hole problem.In addition, the preparation of surfactant of the present invention
Method is simple and feasible.
Embodiment
The technical scheme in the embodiment of the present invention is clearly and completely described below, it is clear that retouched
The embodiment stated is only a part of embodiment of the invention, rather than whole embodiments.Based on the present invention
In embodiment, the institute that those of ordinary skill in the art are obtained under the premise of creative work is not made
There is other embodiment, belong to the scope of protection of the invention.
The invention provides a kind of drilling fluid surfactant, with Formulas I general structure：
In Formulas I, R1It is C selected from formulanH2n+1Straight chained alkyl or formula be CmH2m-1Straight chained alkyl,
N is selected from the integer between 10~22, and m is selected from the integer between 20~22；
R2For methyl or ethyl；
R3For-(CH2)t-, t is selected from the integer between 1~3；
Z is-COONa ,-COOK ,-SO3Na or-SO3K。
The surfactant that the present invention is provided has preferable foam performance, available in drilling fluid.The brill
Well liquid surfactant has good sealing function to air core in microvesicle, the stability of microvesicle and micro-
Steep resistance to compression strong, can guarantee that micro-foam drilling fluid has relatively low circulating density under the high pressure of shaft bottom, subtract
Few down hole problem.
In the present invention, the surfactant has Formulas I general structure.In Formulas I, R1It can be formula
For CnH2n+1Straight chained alkyl；N is selected from the integer between 10~22, preferably is selected from the integer between 11~21.
In an embodiment of the present invention, n can be 11,13,15,17,19 or 21, i.e. R1Can be C11H23、
C13H27、C15H31、C17H33、C17H35、C19H39Or C21H43Such straight chained alkyl.Or, R1
Can be that formula is CmH2m-1Straight chained alkyl；M is selected from the integer between 20~22, preferably 21.
In some embodiments of the invention, R1Can be C21H41Straight chained alkyl.
In formula I, R2For methyl (- CH3) or ethyl (- CH2CH3)。R3For-(CH2)t-,
T is selected from the integer between 1~3, i.e. R in Formulas I3For-CH2-、-(CH2)2- or-(CH2)3-。Z
For-COONa ,-COOK ,-SO3Na or-SO3K, is preferably-COONa or-SO3Na。
Specifically, drilling fluid surfactant has Formulas I -1, Formulas I -2, Formulas I -3 in the embodiment of the present invention
Or the structure of Formulas I -4：
Correspondingly, the invention provides a kind of preparation method of drilling fluid surfactant, including it is following
Step：
Alkyl acyl halide compound is reacted in the basic conditions with amino-compound, drilling fluid use is obtained
Surfactant；The alkyl acyl halide compound has Formula II structure：
The amino-compound has formula III structure：
R2-NH-R3- Z formula IIIs；
The drilling fluid surfactant has Formulas I structure：
Wherein, R1It is C selected from formulanH2n+1Straight chained alkyl or formula be CmH2m-1Straight chained alkyl, n
Integer between 10~22, m is selected from the integer between 20~22；X is halogen；
R2For methyl or ethyl；R3For-(CH2)t-, t is selected from the integer between 1~3；Z be-COONa,
-COOK、-SO3Na or-SO3K。
The present invention using alkyl acyl halide compound and amino-compound as raw material, wherein, the alkyl acyl halide
Compound has Formula II structure.In Formula II, R1Can be that formula is CnH2n+1Straight chained alkyl；N is selected from
Integer between 10~22, preferably is selected from the integer between 11~21.In an embodiment of the present invention, n can be
11st, 13,15,17,19 or 21, i.e. R1Can be C11H23、C13H27、C15H31、C17H33、C17H35、
C19H39Or C21H43Such straight chained alkyl.Or, R1Can be that formula is CmH2m-1Straight chained alkyl；
M is selected from the integer between 20~22, preferably 21.In some embodiments of the invention, R1Can be C21H41
Straight chained alkyl.In Formula II, X is halogen, preferably chlorine.
In the present invention, the alkyl acyl halide compound preferably is selected from dodecane acyl chlorides, myristyl chloride, ten
In six alkane acyl chlorides, stearyl chloride, eicosane acyl chlorides, docosane acyl chlorides, oleoyl chloride and erucic acid acyl chlorides
Any one.
In the present invention, the amino-compound has formula III structure.In formula III, R2For methyl (- CH3)
Or ethyl (- CH2CH3)。R3For-(CH2)t-, t is selected from the integer between 1~3, i.e., in formula III
R3For-CH2-、-(CH2)2- or-(CH2)3-.Z is-COONa ,-COOK ,-SO3Na or-SO3K,
Preferably-COONa or-SO3Na.In the present invention, the amino-compound is selected from 2- methylamino acetic acids
Sodium, 2- ethylaminoacetic acids sodium, 3- methylaminopropionic acids sodium, 3- ethylaminos sodium propionate, 4- methylaminobutyric acids sodium,
4- ethylaminobutyric acids sodium, 2- methyl taurines sodium, 2- ethylamino ethyl sulfonic acids sodium, 3- methylaminos propanesulfonate,
Any one in the sylvite of 3- ethylaminos propanesulfonate and above-claimed cpd.
The present invention is preferably by the alkyl acyl halide compound and alkaline aqueous solution, while adding the amination
Reacted in the compound aqueous solution, obtain drilling fluid surfactant.
1mol amino-compounds can be dissolved in water by the embodiment of the present invention, and it is 15~40% to be configured to mass concentration
The amino-compound aqueous solution.Also, the solution temperature is controlled at 0~40 DEG C, it is stand-by.Of the invention real
Apply in example, the mol ratio of the alkyl acyl halide compound and amino-compound is preferably 0.8~1.2:1, it is more excellent
Elect 0.9~1.1 as:1.The embodiment of the present invention can weigh alkyl acyl halide compound in the ratio of the amount of certain material,
It is stand-by.
Alkali compounds can be configured to alkaline aqueous solution by the present invention, and there is provided basic reaction conditions.In this hair
In bright, the alkaline aqueous solution is preferably sodium hydroxide solution.Sodium hydroxide in the sodium hydroxide solution
Mol ratio with alkyl acyl halide compound is preferably 0.9~1.1:1, more preferably 1:1.In some of the present invention
In embodiment, NaOH can be weighed in the ratio of the amount of above-mentioned substance, be dissolved in after water, be configured to quality dense
The solution for 10~35% is spent, it is stand-by.
Alkyl acyl halide compound and alkaline aqueous solution preferably under agitation, are added ammonia by the present invention simultaneously
In the based compound aqueous solution.In an embodiment of the present invention, the mode of the addition is dropwise addition.The present invention
The controllable time being added dropwise is 0.5h~5h, preferably 0.5h~2h.After completion of dropwise addition, the embodiment of the present invention
0.3h~0.6h is stirred for, reaction obtains drilling fluid surfactant.
After the completion of reaction, the embodiment of the present invention can obtain white solution, through conventional drying, obtain drilling fluid
Use surfactant product.Product produced by the present invention has Formulas I structure, its content as it was noted above,
This is repeated no more.
Surfactant foam performance produced by the present invention is good；During for drilling fluid, the foam of formation has
More preferable stability and resistance to compression, have good sealing function to air core in drilling fluid microvesicle,
It can guarantee that micro-foam drilling fluid has relatively low circulating density under the high pressure of shaft bottom, reduce down hole problem.
In addition, the preparation method of surfactant of the present invention is simple and feasible.
Present invention also offers a kind of drilling fluid, including foaming agent, the foaming agent has Formulas I general structure：
In Formulas I, R1It is C selected from formulanH2n+1Straight chained alkyl or formula be CmH2m-1Straight chained alkyl,
N is selected from the integer between 10~22, and m is selected from the integer between 20~22；
R2For methyl or ethyl；
R3For-(CH2) t-, integers of the t between 1~3；
Z is-COONa ,-COOK ,-SO3Na or-SO3K。
The drilling fluid that the present invention is provided includes foaming agent, and it is the surfactant with Formulas I general structure.
The contents such as the structure of the surfactant are as it was noted above, this is no longer going to repeat them.The present invention's
In some preferred embodiments, R1In n be 11,13,15,17,19 or 21.In the present invention another
In some preferred embodiments, R1In m be 21.In the present invention, the foaming agent is in drilling fluid
Dosage is preferably 0.8~1.5wt%, more preferably 0.9~1.1wt%.
In an embodiment of the present invention, the drilling fluid is micro-foam drilling fluid, and its pH value is 8~10, close
Spend for 0.80~0.95g/cm3.The preparation and additive of the present invention to the drilling fluid etc. is not particularly limited；
In some embodiments of the invention, the drilling fluid includes：3~5wt% bentonite slurries, 0.8~1.5wt%
Foaming agent, 0.1~1wt% xanthans, 0.5~2wt% sodium carboxymethylcelluloses and 1~3wt% potassium chloride；Remaining
It is water.
The embodiment of the present invention adds the components such as above-mentioned surfactant, is configured to micro-foam drilling fluid.The present invention
Embodiment is after 120 DEG C of high temperature ageing 16h, using the performance of six fast rotary viscosity design determining micro-foam drilling fluids,
Assay method meets international API standard.Testing result shows that the density before and after drilling fluid aging is differed only by
0.02g/cm3, show good high temperature stability performance.
For a further understanding of the application, the drilling fluid surface provided with reference to embodiment the application
Activating agent, its preparation method and drilling fluid are specifically described.
Embodiment 1
1mol (111g) 2- methylamino acetic acid sodium is dissolved in clear water, it is 15% to be configured to mass concentration
Solution, control solution temperature is stand-by at 10 DEG C, weighs 0.8mol (174.8g) dodecane acyl chlorides, treats
With, 0.8mol (32g) NaOH is weighed, the solution for being configured to that mass concentration is 10% after clear water is dissolved in,
It is stand-by.
Under agitation, above-mentioned dodecane acyl chlorides and NaOH solution are added dropwise in reaction system simultaneously,
It is 0.5h to control time for adding, and 0.5h is stirred for after completion of dropwise addition, obtains white solution, after drying, is obtained
To 241.8g micro-foam drilling fluid surfactant products.The product measures structural formula by infrared spectrum：
Embodiment 2
1mol (169g) 4- ethylaminobutyric acid potassium is dissolved in clear water, it is 20% to be configured to mass concentration
Solution, control solution temperature is stand-by at 0 DEG C, weighs 1mol (246.5g) myristyl chloride, stand-by,
0.9mol (40g) NaOH is weighed, the solution for being configured to that mass concentration is 20% after clear water is dissolved in, treats
With.
Under agitation, above-mentioned myristyl chloride and NaOH solution are added dropwise in reaction system simultaneously,
It is 2h to control time for adding, and 0.6h is stirred for after completion of dropwise addition, obtains white solution, after drying, is obtained
370.1g micro-foam drilling fluid surfactant products, its structural formula is：
Embodiment 3
1mol (175g) 3- methylamino propanesulfonates are dissolved in clear water, it is 40% to be configured to mass concentration
Solution, control solution temperature at 40 DEG C, it is stand-by, weigh 1.2mol (329.4g) hexadecane acyl chlorides,
It is stand-by, 1.32mol (52.8g) NaOH is weighed, it is 35% to be dissolved in and mass concentration is configured to after clear water
Solution, it is stand-by.
Under agitation, above-mentioned hexadecane acyl chlorides and NaOH solution are added dropwise in reaction system simultaneously,
It is 5h to control time for adding, and 0.3h is stirred for after completion of dropwise addition, obtains white solution, after drying, is obtained
452.3g micro-foam drilling fluid surfactant products, its structural formula is：
Embodiment 4~10
According to step same as Example 1, micro-foam drilling fluid is prepared respectively and is produced with surfactant
Product.Difference is reactive material and its consumption, as shown in table 1, and table 1 is the reactant of embodiment 4~10
Matter and its consumption.
The reactive material and its consumption of the embodiment 4~10 of table 1
| Embodiment | Amino-compound | Alkyl acyl chloride | NaOH |
| 4 | 1mol 2- ethylaminoacetic acid potassium | 0.9mol stearyl chlorides | 0.9mol |
| 5 | 1mol 3- methylaminopropionic acid sodium | 0.95mol eicosane acyl chlorides | 0.95mol |
| 6 | 1mol 3- ethylamino potassium propionates | 1mol docosane acyl chlorides | 1.1mol |
| 7 | 1mol 4- methylaminobutyric acid sodium | 1.05mol oleoyl chloride | 1.05mol |
| 8 | 1mol 2- methyl taurine sodium | 1.1mol erucic acid acyl chlorides | 0.99mol |
| 9 | 1mol 2- ethylamino ethyl sulfonic acid potassium | 1.15mol dodecane acyl chlorides | 1.15mol |
| 10 | 1mol 3- ethylamino propanesulfonates | 1.2mol myristyl chloride | 1.32mol |
Embodiment 11
In accordance with the following methods, the surfactant synthesized in embodiment 1~10 is subjected to performance evaluation.
(1) foam stability
In 100mL clear water add 4g KCl and 1g embodiments in sample, with homogenizer with
8000r/min speed stir 5min, then by gained foam slurry pour into graduated cylinder, record foam volume and
Foam system separates out the time used in 50mL foaming base fluids, is used as half foam life period.As a result referring to table 2,
Table 2 is the Evaluation results of the gained surfactant of embodiment 1~10.
The Evaluation results of the gained surfactant of 2 embodiment of table 1~10
As shown in Table 2, compared to general surfactant such as lauryl sodium sulfate, the present invention is made
Surfactant foam performance it is good, the foam of formation has more preferable stability and resistance to compression.
Embodiment 12
The performance of drilling fluid including surfactant
Surfactant and lauryl sodium sulfate in embodiment 3 are separately added into drilling fluid, matched somebody with somebody respectively
Micro-foam drilling fluid is made.By percentage to the quality, drilling fluid composition is：Live on the surface of 4% bentonite slurry+1%
Sodium carboxymethylcellulose+the 2%KCl of property agent+0.5% xanthans+1%, remaining is water.
After 120 DEG C of high temperature ageing 16h, using the performance of six fast rotary viscosity design determining micro-foam drilling fluids,
Assay method meets international API standard, as a result as shown in table 3, and table 3 is microvesicle drilling well in embodiment 12
The results of property of liquid.
The results of property of micro-foam drilling fluid in the embodiment 12 of table 3
As known from Table 3, the present invention is synthesized surfactant and existing surfactant such as dodecyl sulphur
Sour sodium is compared, and foam stability is remarkably reinforced；After 120 DEG C of aging 16h, the microvesicle that the present invention is provided is bored
Before and after well liquid aging, drilling fluid density differs only by 0.02g/cm3, show good high temperature stability performance.
Described above is only the preferred embodiment of the present invention, it is noted that for making the art
Professional and technical personnel, without departing from the technical principles of the invention, is that by implementing these
A variety of modifications of example, and these modifications also should be regarded as the scope that the present invention should be protected.
Claims (10)
1. a kind of drilling fluid surfactant, with Formulas I general structure：
In Formulas I, R1It is C selected from formulanH2n+1Straight chained alkyl or formula be CmH2m-1Straight chained alkyl,
N is selected from the integer between 10~22, and m is selected from the integer between 20~22；
R2For methyl or ethyl；
R3For-(CH2)t-, t is selected from the integer between 1~3；
Z is-COONa ,-COOK ,-SO3Na or-SO3K。
2. drilling fluid surfactant according to claim 1, it is characterised in that n is 11,
13rd, 15,17,19 or 21；M is 21.
3. a kind of preparation method of drilling fluid surfactant, comprises the following steps：
Alkyl acyl halide compound is reacted in the basic conditions with amino-compound, drilling fluid use is obtained
Surfactant；The alkyl acyl halide compound has Formula II structure：
The amino-compound has formula III structure：
R2-NH-R3- Z formula IIIs；
The drilling fluid surfactant has Formulas I general structure：
Wherein, R1It is C selected from formulanH2n+1Straight chained alkyl or formula be CmH2m-1Straight chained alkyl, n
Integer between 10~22, m is selected from the integer between 20~22；X is halogen；
R2For methyl or ethyl；R3For-(CH2)t-, t is selected from the integer between 1~3；Z be-COONa,
-COOK、-SO3Na or-SO3K。
4. preparation method according to claim 3, it is characterised in that the alkyl acyl halide compound
Selected from dodecane acyl chlorides, myristyl chloride, hexadecane acyl chlorides, stearyl chloride, eicosane acyl chlorides, two
Any one in dodecane acyl chlorides, oleoyl chloride and erucic acid acyl chlorides.
5. preparation method according to claim 3, it is characterised in that by alkyl acyl halide compound and
Alkaline aqueous solution is added in the amino-compound aqueous solution simultaneously, is reacted, obtains drilling fluid and lived with surface
Property agent；The alkaline aqueous solution is sodium hydroxide and alkane in sodium hydroxide solution, the sodium hydroxide solution
The mol ratio of base acetyl halide compound is 0.9~1.1:1.
6. preparation method according to claim 5, it is characterised in that the mode of the addition is drop
Plus；It is 0.5h~5h to control the time being added dropwise, and 0.3h~0.6h is stirred for after completion of dropwise addition, obtains drilling fluid use
Surfactant.
7. a kind of drilling fluid, including foaming agent, it is characterised in that there is the foaming agent Formulas I structure to lead to
Formula：
In Formulas I, R1It is C selected from formulanH2n+1Straight chained alkyl or formula be CmH2m-1Straight chained alkyl,
N is selected from the integer between 10~22, and m is selected from the integer between 20~22；
R2For methyl or ethyl；
R3For-(CH2)t-, t is selected from the integer between 1~3；
Z is-COONa ,-COOK ,-SO3Na or-SO3K。
8. drilling fluid according to claim 7, it is characterised in that n is 11,13,15,17,
19 or 21；M is 21.
9. drilling fluid according to claim 7, it is characterised in that the dosage of the foaming agent is
0.8~1.5wt%.
10. drilling fluid according to claim 7, it is characterised in that the drilling fluid includes：3~5wt%
Bentonite slurry, 0.8~1.5wt% foaming agents, 0.1~1wt% xanthans, 0.5~2wt% sodium carboxymethylcelluloses
With 1~3wt% potassium chloride.
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