CN113801642A - Cutting extraction composition, cutting extraction agent, preparation method and application of cutting extraction agent - Google Patents
Cutting extraction composition, cutting extraction agent, preparation method and application of cutting extraction agent Download PDFInfo
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- 238000005520 cutting process Methods 0.000 title claims abstract description 69
- 239000000203 mixture Substances 0.000 title claims abstract description 33
- 238000000605 extraction Methods 0.000 title claims abstract description 27
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 71
- 238000005553 drilling Methods 0.000 claims abstract description 63
- 239000012530 fluid Substances 0.000 claims abstract description 58
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 claims abstract description 30
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 claims abstract description 15
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 claims abstract description 15
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 claims abstract description 15
- RPNUMPOLZDHAAY-UHFFFAOYSA-N Diethylenetriamine Chemical compound NCCNCCN RPNUMPOLZDHAAY-UHFFFAOYSA-N 0.000 claims abstract description 15
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000005642 Oleic acid Substances 0.000 claims abstract description 15
- 239000001361 adipic acid Substances 0.000 claims abstract description 15
- 235000011037 adipic acid Nutrition 0.000 claims abstract description 15
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 claims abstract description 15
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 claims abstract description 15
- 238000006243 chemical reaction Methods 0.000 claims description 43
- 238000006482 condensation reaction Methods 0.000 claims description 41
- 230000018044 dehydration Effects 0.000 claims description 36
- 238000006297 dehydration reaction Methods 0.000 claims description 36
- RUOJZAUFBMNUDX-UHFFFAOYSA-N propylene carbonate Chemical compound CC1COC(=O)O1 RUOJZAUFBMNUDX-UHFFFAOYSA-N 0.000 claims description 16
- 238000001816 cooling Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 11
- 239000002904 solvent Substances 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 6
- 239000002131 composite material Substances 0.000 claims 1
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 abstract description 14
- 229910052601 baryte Inorganic materials 0.000 abstract description 14
- 239000010428 baryte Substances 0.000 abstract description 14
- 239000000178 monomer Substances 0.000 abstract description 14
- 239000000725 suspension Substances 0.000 abstract description 8
- 230000008901 benefit Effects 0.000 abstract description 7
- 238000004132 cross linking Methods 0.000 abstract description 7
- 239000011435 rock Substances 0.000 abstract description 7
- 125000000217 alkyl group Chemical group 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 5
- 239000007859 condensation product Substances 0.000 abstract description 5
- 230000002401 inhibitory effect Effects 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 229920000642 polymer Polymers 0.000 abstract description 5
- 239000002994 raw material Substances 0.000 abstract description 5
- 238000003756 stirring Methods 0.000 description 14
- 238000007599 discharging Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 10
- 239000000047 product Substances 0.000 description 8
- 239000003995 emulsifying agent Substances 0.000 description 7
- 230000002708 enhancing effect Effects 0.000 description 7
- 239000002689 soil Substances 0.000 description 6
- 239000007789 gas Substances 0.000 description 5
- 125000003368 amide group Chemical group 0.000 description 4
- 125000003277 amino group Chemical group 0.000 description 4
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 4
- 238000009833 condensation Methods 0.000 description 4
- 230000005494 condensation Effects 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- 125000000879 imine group Chemical group 0.000 description 4
- 239000000654 additive Substances 0.000 description 3
- 230000000996 additive effect Effects 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 3
- 239000001110 calcium chloride Substances 0.000 description 3
- 229910001628 calcium chloride Inorganic materials 0.000 description 3
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 3
- 239000000292 calcium oxide Substances 0.000 description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 3
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000002283 diesel fuel Substances 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000000706 filtrate Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 238000012360 testing method Methods 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
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C231/00—Preparation of carboxylic acid amides
- C07C231/02—Preparation of carboxylic acid amides from carboxylic acids or from esters, anhydrides, or halides thereof by reaction with ammonia or amines
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C231/00—Preparation of carboxylic acid amides
- C07C231/14—Preparation of carboxylic acid amides by formation of carboxamide groups together with reactions not involving the carboxamide groups
-
- 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
- C07C233/34—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 amino groups
- C07C233/35—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 amino groups with the substituted hydrocarbon radical bound to the nitrogen atom of the carboxamide group by an acyclic carbon atom
- C07C233/38—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 amino 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 carbon atom of an acyclic unsaturated carbon skeleton
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Lubricants (AREA)
Abstract
The invention provides a cutting extraction composition, a cutting extraction agent, a preparation method of the cutting extraction agent and application of the cutting extraction agent. The extraction and cutting composition comprises, by weight, 120-160 parts of adipic acid, 80-120 parts of diethylenetriamine and 250-350 parts of oleic acid. The crosslinking density of the polymer polycondensate formed by the monomers in the parts by weight is beneficial to fully inhibiting the sliding among molecular chains of the polymer polycondensate and increasing the hardness and the modulus of the polymer polycondensate, so that the polymer polycondensate has higher stability. In addition, the long linear alkyl in the high molecular condensation product can form a three-dimensional network structure through association; when the high-molecular polycondensate is used as a cutting agent of an oil-based drilling fluid system, the cutting force of the oil-based drilling fluid system can be improved, so that the barite suspension and rock carrying capacity of the oil-based drilling fluid system are enhanced. The extraction and cutting composition has the advantages of simple formula, wide monomer raw material source and relatively low production cost.
Description
Technical Field
The invention relates to the technical field of oil exploitation, in particular to a cutting extraction composition, a cutting extraction agent, a preparation method of the cutting extraction agent and application of the cutting extraction agent.
Background
With the continuous progress of the oil and gas exploration and development target in China to deep ultra-deep layers and complex strata, the technical difficulties and the accident complex situations in the drilling process of various complex strata such as high-temperature and high-pressure deep wells, large-inclination directional wells, large-displacement horizontal wells, ultra-strong water-sensitive strata and the like are more and more. The oil-based drilling fluid has incomparable advantages of water-based drilling fluid, such as high-temperature stability, high permeability recovery value, good lubricity, small damage to a reservoir, good well wall stability effect, strong shale inhibition, wide density application range, stable performance under high density and the like, can greatly reduce underground complex conditions in the drilling process of complex strata, can be recycled and reused, and can better control the drilling fluid cost and the drilling comprehensive cost. Therefore, in recent years, oil-based drilling fluid technology is widely researched and applied to shale gas wells and high-temperature and high-pressure deep wells, and some achievements are achieved. However, problems such as barite sedimentation and difficult drill chip carrying and formation of a detritus bed and the like are caused when an oil-based drilling fluid system and an oil-based drilling fluid system with high oil-water ratio are used for drilling a horizontal section of a horizontal well due to low shearing force performance of the drilling fluid system. The shear strength improving agent is used as a core treating agent of the oil-based drilling fluid, and mainly has the functions of improving the shear strength of a drilling fluid system, enhancing the suspension and carrying capacity of barite and making up for the deficiency of the tackifying and shear strength improving effect of organic soil. In the past, China mainly focuses on the research of organic soil, emulsifying agents, filtrate reducers and other oil-based drilling fluid core treating agents, the research on cutting agents is less, the number of commercialized cutting agent products is less, and the performance of the cutting agents cannot meet the actual field requirements.
Disclosure of Invention
The invention mainly aims to provide a shear-improving composition, a shear-improving agent, a preparation method of the shear-improving agent and application of the shear-improving agent, so as to solve the problem of low shear performance of a drilling fluid system in the prior art.
In order to achieve the above object, according to one aspect of the present invention, there is provided a cut-and-extract composition comprising, in parts by weight: 120-160 parts of adipic acid, 80-120 parts of diethylenetriamine and 250-350 parts of oleic acid.
Further, the above mentioned cutting composition further comprises a solvent, preferably 3#The mixture of white oil and propylene carbonate, in parts by weight, is more preferably 3#The amount of white oil is 100 to 200 parts, and preferably 10 to 30 parts of propylene carbonate.
According to another aspect of the present invention, a preparation method of a shear enhancing agent is provided, wherein the shear enhancing agent is prepared by using the shear enhancing composition, and the preparation method comprises step S1, wherein adipic acid and diethylenetriamine are subjected to a first dehydration condensation reaction to obtain a first reaction system; and step S2, carrying out a second dehydration condensation reaction on the system after the first reaction and oleic acid to obtain the shear promoter.
Further, the step S2 includes: a process of cooling the system formed by the second dehydration condensation reaction to obtain a system after the second reaction, wherein the target temperature of cooling is 100-130 ℃, and preferably 120 ℃; and adopting a solvent to dilute the system after the second reaction to obtain the shear-promoting agent.
Further, the temperature of the first dehydrating condensation reaction in the step S1 is 150 to 180 ℃, and the time of the first dehydrating condensation reaction is preferably 4 to 7 hours.
Further, the temperature of the second dehydration condensation reaction in the step S2 is 150 to 180 ℃, and the time of the second dehydration condensation reaction is preferably 2 to 5 hours.
According to another aspect of the present invention, there is provided a cutting extraction agent obtained by any one of the above-mentioned preparation methods.
According to another aspect of the invention, the application of the cutting promoter is provided, and the application comprises the step of applying the cutting promoter to an oil-based drilling fluid system, preferably any one of a diesel oil system, a white oil system or a gas-based oil-based drilling fluid system, and preferably the oil-water ratio of the oil-based drilling fluid system is in a range of 80: 20-95: 5.
Further, the temperature of the oil-based drilling fluid system is below 200 ℃.
Further, the density of the oil-based drilling fluid system is 0.9-2.2 g/cm3Within the range.
According to the technical scheme of the invention, the three monomers form the high-molecular polycondensate containing a cross-linking structure through dehydration condensation, and the cross-linking density of the high-molecular polycondensate formed by the monomers in parts by weight is beneficial to fully inhibiting the sliding among molecular chains of the high-molecular polycondensate and increasing the hardness and modulus of the high-molecular polycondensate, so that the high-molecular polycondensate has higher stability. In addition, the long linear alkyl in the high molecular condensation product can form a three-dimensional network structure through association; the polar groups such as amine group, imine group, carboxyl group and amide group can interact with other groups through electrostatic attraction or hydrogen bonds to form a network structure with larger specific surface area. When the high-molecular polycondensate is used as the cutting agent of the oil-based drilling fluid system, the cutting force of the oil-based drilling fluid system can be improved through the two effects, so that the barite suspension and the rock carrying capacity of the oil-based drilling fluid system are enhanced.
The cutting-extracting composition has the advantages of simple formula, wide monomer raw material source and relatively low production cost, and the cutting-extracting agent prepared from the cutting-extracting composition has excellent high-temperature stability and higher cutting-extracting efficiency.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail with reference to examples.
As analyzed by the background technology, the problem of low shearing force performance of a drilling fluid system exists in the prior art, and in order to solve the problem, the invention provides a shear-improving composition, a shear-improving agent, a preparation method of the shear-improving agent and application of the shear-improving agent.
In a typical embodiment of the present application, there is provided an extraction-cutting composition comprising, by weight, 120 to 160 parts of adipic acid, 80 to 120 parts of diethylenetriamine, and 250 to 350 parts of oleic acid.
The three monomers form the high-molecular polycondensate containing a cross-linked structure through dehydration condensation, and the cross-linking density of the high-molecular polycondensate formed by the monomers in parts by weight is favorable for fully inhibiting the sliding among molecular chains of the high-molecular polycondensate and increasing the hardness and the modulus of the high-molecular polycondensate, so that the high-molecular polycondensate has higher stability. In addition, the long linear alkyl in the high molecular condensation product can form a three-dimensional network structure through association; the polar groups such as amine group, imine group, carboxyl group and amide group can interact with other groups through electrostatic attraction or hydrogen bonds to form a network structure with larger specific surface area. When the high-molecular polycondensate is used as the cutting agent of the oil-based drilling fluid system, the cutting force of the oil-based drilling fluid system can be improved through the two effects, so that the barite suspension and the rock carrying capacity of the oil-based drilling fluid system are enhanced.
The cutting-extracting composition has the advantages of simple formula, wide monomer raw material source and relatively low production cost, and the cutting-extracting agent prepared from the cutting-extracting composition has excellent high-temperature stability and higher cutting-extracting efficiency.
The polymer polycondensate has a large viscosity due to a large molecular weight and a network structure, and in order to adjust the viscosity to a viscosity suitable for use as a shear-promoting agent, the shear-promoting composition preferably further contains a solvent, preferably the solvent is 3#The mixture of white oil and propylene carbonate, in parts by weight, is more preferably 3#The amount of white oil is 100 to 200 parts, and preferably 10 to 30 parts of propylene carbonate.
In another exemplary embodiment of the present application, a method for preparing a cutting extraction agent is provided, the cutting extraction agent is prepared by using any one of the cutting extraction compositions, the preparation method includes step S1, a first dehydration condensation reaction is performed between adipic acid and diethylenetriamine to obtain a first post-reaction system; and step S2, carrying out a second dehydration condensation reaction on the system after the first reaction and oleic acid to obtain the shear promoter.
The preparation method comprises the steps of firstly polymerizing adipic acid and diethylenetriamine to obtain a first reacted system, and then carrying out a second dehydration condensation reaction on the first reacted system and oleic acid, wherein the condensation sequence of the monomers determines the cross-linking structure of the formed high-molecular polycondensate, and the cross-linking density of the high-molecular polycondensate formed by the monomers in parts by weight is beneficial to fully inhibiting the sliding among the molecular chains of the high-molecular polycondensate and increasing the hardness and modulus of the high-molecular polycondensate, so that the high-molecular polycondensate has higher stability. In addition, the long linear alkyl in the high molecular condensation product can form a three-dimensional network structure through association; the polar groups such as amine group, imine group, carboxyl group and amide group can interact with other groups through electrostatic attraction or hydrogen bonds to form a network structure with larger specific surface area. When the high-molecular polycondensate is used as the cutting agent of the oil-based drilling fluid system, the cutting force of the oil-based drilling fluid system can be improved through the two effects, so that the barite suspension and the rock carrying capacity of the oil-based drilling fluid system are enhanced. It is more beneficial to ensure that the shear-promoting agent has higher stability and shear-promoting efficiency. The preparation method has the advantages of wide sources of raw materials for preparing the monomers and simple preparation method.
The temperature reduction is to facilitate discharging the shear enhancing agent from the reaction kettle, and since the viscosity of the shear enhancing agent is influenced by the temperature, in order to facilitate discharging operation at low temperature and to ensure that the viscosity of the shear enhancing agent is too high and the discharging effect of the reaction kettle is not good, preferably, the step S2 includes a process of reducing the temperature of a system formed by the second dehydration condensation reaction to obtain a system after the second reaction, wherein the target temperature of the temperature reduction is 100-130 ℃, and is preferably 120 ℃; and adopting a solvent to dilute the system after the second reaction to obtain the shear-promoting agent. Aspect 3#The white oil and the propylene carbonate have wide sources, are cheap and easily obtained, and adopt 3#The mixture of white oil and propylene carbonate as a diluting solvent helps to reduce the production cost; on the other hand, using 3#The white oil and the propylene carbonate are beneficial to reducing the interference on the performance of the cutting agent as much as possible.
In an embodiment of the present invention, the temperature of the first dehydrating condensation reaction in the step S1 is 150 to 180 ℃, and the time of the first dehydrating condensation reaction is preferably 4 to 7 hours.
In order to achieve the efficiency of the first dehydration condensation reaction and reduce the probability of side reactions caused by over-high temperature, the temperature is preferably in the range, the time of the first dehydration condensation reaction is 4-7 h, and the degree of the first dehydration condensation reaction is favorably controlled to be no longer generating moisture, namely the basic reaction is complete.
In order to improve the efficiency of the second dehydration condensation reaction and control the degree of the second dehydration condensation reaction, the temperature of the second dehydration condensation reaction in the step S2 is preferably 150 to 180 ℃, and the time of the second dehydration condensation reaction is preferably 2 to 5 hours.
In another exemplary embodiment of the present application, there is provided a cutting extraction agent obtained by any one of the above-mentioned preparation methods.
The cutting agent prepared by the preparation method has excellent high-temperature stability and higher cutting efficiency.
In yet another exemplary embodiment of the present application, there is provided a use of an extraction cutting agent, the use comprising using the extraction cutting agent in an oil-based drilling fluid system, preferably any one of a diesel, white oil or gas oil-based drilling fluid system, preferably the oil-to-water ratio of the oil-based drilling fluid system is in the range of 80:20 to 95: 5.
The shear strength of the diesel oil-based drilling fluid system, white oil or gas-based drilling fluid system can be improved by using the shear strength improving agent in the oil-based drilling fluid system, so that the barite suspension and rock carrying capacity of the oil-based drilling fluid system can be improved, the defect of organic soil tackifying and shear strength improving efficiency can be overcome, and the problems of barite settlement, poor rock carrying capacity and the like caused by low shear strength of the oil-based drilling fluid system in the process of drilling a large-displacement horizontal well can be solved.
The cutting agent has excellent high-temperature stability, and in order to balance the high-temperature resistance and the cutting efficiency of the cutting agent, the temperature of the oil-based drilling fluid system is preferably below 200 ℃.
In order to further improve the application effect and the economic benefit of the filtrate reducer, the density of the oil-based drilling fluid system is preferably 0.9-2.2 g/cm3Within the range.
The advantageous effects of the present application will be described below with reference to specific examples and comparative examples.
Example 1
Firstly, 146 parts of adipic acid and 108 parts of diethylenetriamine are sequentially added into a reaction container, and the mixture is heated to 165 ℃ under continuous stirring to carry out dehydration condensation reaction for 3 hours, so as to obtain a first post-reaction system. And then adding 296 parts of oleic acid into the system after the first reaction, continuously carrying out dehydration condensation reaction for 3 hours at 165 ℃, cooling to 120 ℃ after the reaction is finished, adding 150 parts of No. 3 white oil and 30 parts of propylene carbonate, uniformly stirring, and discharging to obtain a finished product of the cutting agent, namely the cutting agent A.
Example 2
Firstly, sequentially adding 120 parts of adipic acid and 80 parts of diethylenetriamine into a reaction container, heating to 165 ℃ under continuous stirring, and carrying out dehydration condensation reaction for 3 hours to obtain a first post-reaction system. And then adding 250 parts of oleic acid into the system after the first reaction, continuing to perform dehydration condensation reaction at 165 ℃ for 3 hours, cooling to 120 ℃ after the reaction is finished, adding 100 parts of 3# white oil and 30 parts of propylene carbonate, uniformly stirring, and discharging to obtain a finished product of the cutting agent, namely the cutting agent B.
Example 3
Firstly, 160 parts of adipic acid and 120 parts of diethylenetriamine are sequentially added into a reaction container, and the mixture is heated to 165 ℃ under continuous stirring to carry out dehydration condensation reaction for 3 hours, so as to obtain a first post-reaction system. And then adding 350 parts of oleic acid into the system after the first reaction, continuing to perform dehydration condensation reaction at 165 ℃ for 3 hours, cooling to 120 ℃ after the reaction is finished, adding 200 parts of No. 3 white oil and 10 parts of propylene carbonate, uniformly stirring, and discharging to obtain a finished product of the cutting agent, namely the cutting agent C.
Example 4
Firstly, 146 parts of adipic acid and 108 parts of diethylenetriamine are sequentially added into a reaction vessel, and the mixture is heated to 150 ℃ under continuous stirring, and is subjected to dehydration condensation reaction for 7 hours, so as to obtain a first post-reaction system. And then adding 296 parts of oleic acid into the system after the first reaction, continuously carrying out dehydration condensation reaction for 2 hours at 180 ℃, cooling to 100 ℃ after the reaction is finished, adding 150 parts of 3# white oil and 30 parts of propylene carbonate, uniformly stirring, and discharging to obtain a finished product of the cutting agent, namely the cutting agent D.
Example 5
Firstly, 146 parts of adipic acid and 108 parts of diethylenetriamine are sequentially added into a reaction vessel, and the mixture is heated to 180 ℃ under continuous stirring to carry out dehydration condensation reaction for 4 hours, thus obtaining a first post-reaction system. And then adding 296 parts of oleic acid into the system after the first reaction, continuously carrying out dehydration condensation reaction for 5 hours at the temperature of 150 ℃, cooling to 130 ℃ after the reaction is finished, adding 150 parts of 3# white oil and 30 parts of propylene carbonate, uniformly stirring, and discharging to obtain a finished product of the cutting agent, namely the cutting agent E.
Example 6
Firstly, 146 parts of adipic acid and 108 parts of diethylenetriamine are sequentially added into a reaction vessel, and the mixture is heated to 140 ℃ under continuous stirring, and is subjected to dehydration condensation reaction for 8 hours to obtain a first post-reaction system. And then adding 296 parts of oleic acid into the system after the first reaction, continuously carrying out dehydration condensation reaction for 1 hour at the temperature of 200 ℃, cooling to 120 ℃ after the reaction is finished, adding 150 parts of 3# white oil and 30 parts of propylene carbonate, uniformly stirring, and discharging to obtain a finished product of the cutting agent, namely the cutting agent F.
Comparative example 1
Firstly, 100 parts of adipic acid and 130 parts of diethylenetriamine are sequentially added into a reaction vessel, and the mixture is heated to 165 ℃ under continuous stirring to carry out dehydration condensation reaction for 3 hours, thus obtaining a first post-reaction system. And then adding 220 parts of oleic acid into the system after the first reaction, continuing to perform dehydration condensation reaction at 165 ℃ for 3 hours, cooling to 120 ℃ after the reaction is finished, adding 80 parts of 3# white oil and 30 parts of propylene carbonate, uniformly stirring, and discharging to obtain a finished product of the cutting agent, namely the cutting agent G.
The performance of the cutting agents a to G will be tested in combination with specific experimental conditions.
The basic formula of the drilling fluid 1, 2 and 3 is as follows:
basic formula 1: 80 parts of 5# white oil and 20 parts of CaCl2An aqueous solution (with the concentration of 20%) +2.5 parts of a main emulsifier +1.5 parts of an auxiliary emulsifier +2 parts of organic soil +4 parts of a fluid loss additive +2 parts of calcium oxide + barite.
Basic formula 2: 70 parts of 5# white oil and 30 parts of CaCl2An aqueous solution (with the concentration of 20%) +3.5 parts of a main emulsifier +2.5 parts of an auxiliary emulsifier +2 parts of organic soil +4 parts of a fluid loss additive +2 parts of calcium oxide + barite.
Basic formula 3: 90 parts of 5# white oil and 10 parts of CaCl2An aqueous solution (with the concentration of 20%) +3.5 parts of a main emulsifier +2.5 parts of an auxiliary emulsifier +2 parts of organic soil +4 parts of a fluid loss additive +2 parts of calcium oxide + barite.
One of the cutting extracting agents A-G is combined with one of the basic formulas 1, 2 and 3 respectively, corresponding drilling fluid is prepared according to the drilling fluid formula in the table 1, the performance of each drilling fluid is measured according to the national standard number GB/T16783.2-2012, and the test results are listed in the table 1.
TABLE 1
The experimental formula of the oil-based drilling fluid with different oil-water ratios and temperatures, which is prepared by the drilling fluid formula added with the shear strength improver A, is tested, and the experimental result shows that: the shear strength improving agent for the oil-based drilling fluid, prepared by the invention, has good high-temperature shear strength improving performance within the range of 200 ℃, and the barite density difference of a high-temperature aging drilling fluid system is small, and the emulsification stability is good. The shear strength improvement range and the barite suspension performance of the oil-based drilling fluid formula system prepared by adding the shear improver G are lower than those of the drilling fluid systems prepared by the shear improvers A-F of examples 1-6.
From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:
the three monomers form the high-molecular polycondensate containing a cross-linked structure through dehydration condensation, and the cross-linking density of the high-molecular polycondensate formed by the monomers in parts by weight is favorable for fully inhibiting the sliding among molecular chains of the high-molecular polycondensate and increasing the hardness and the modulus of the high-molecular polycondensate, so that the high-molecular polycondensate has higher stability. In addition, the long linear alkyl in the high molecular condensation product can form a three-dimensional network structure through association; the polar groups such as amine group, imine group, carboxyl group and amide group can interact with other groups through electrostatic attraction or hydrogen bonds to form a network structure with larger specific surface area. When the high-molecular polycondensate is used as the cutting agent of the oil-based drilling fluid system, the cutting force of the oil-based drilling fluid system can be improved through the two effects, so that the barite suspension and the rock carrying capacity of the oil-based drilling fluid system are enhanced.
The cutting-extracting composition has the advantages of simple formula, wide monomer raw material source and relatively low production cost, and the cutting-extracting agent prepared from the cutting-extracting composition has excellent high-temperature stability and higher cutting-extracting efficiency.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A lifting and cutting composition is characterized by comprising the following components in parts by weight:
120-160 parts of adipic acid, 80-120 parts of diethylenetriamine and 250-350 parts of oleic acid.
2. The cut-and-extract composition according to claim 1, further comprising a solvent, preferably the solvent is 3#A mixture of white oil and propylene carbonate, more preferably 3 parts by weight#The amount of the white oil is 100 to 200 parts, and preferably 10 to 30 parts of the propylene carbonate.
3. A method for preparing a cutting extraction agent, wherein the cutting extraction agent is prepared from the cutting extraction composition of claim 1 or 2, and the preparation method comprises the following steps:
step S1, carrying out a first dehydration condensation reaction on adipic acid and diethylenetriamine to obtain a first reaction system; and
and step S2, carrying out a second dehydration condensation reaction on the system after the first reaction and oleic acid to obtain the shear promoter.
4. The method for preparing a composite material according to claim 3, wherein the step S2 includes:
a process of cooling the system formed by the second dehydration condensation reaction to obtain a system after the second reaction, wherein the target temperature of cooling is 100-130 ℃, and preferably 120 ℃;
and adopting a solvent to dilute the system after the second reaction to obtain the shear strength improving agent.
5. The method according to claim 3, wherein the temperature of the first dehydrating condensation reaction in the step S1 is 150 to 180 ℃, and preferably the time of the first dehydrating condensation reaction is 4 to 7 hours.
6. The method according to claim 3, wherein the temperature of the second dehydrating condensation reaction in step S2 is 150 to 180 ℃, and preferably the time of the second dehydrating condensation reaction is 2 to 5 hours.
7. A cutting extraction agent, which is obtained by the preparation method of any one of claims 3 to 6.
8. The use of the cutting agent as claimed in claim 7, wherein the use comprises using the cutting agent in an oil-based drilling fluid system, preferably the oil-based drilling fluid system is any one of diesel, white oil or gas-based oil-based drilling fluid systems, preferably the oil-water ratio of the oil-based drilling fluid system is in the range of 80:20 to 95: 5.
9. The use of claim 8 wherein the temperature of the oil-based drilling fluid system is below 200 ℃.
10. The use of claim 8, wherein the oil-based drilling fluid system has a density of 0.9 to 2.2g/cm3Within the range.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080019882A1 (en) * | 2004-08-25 | 2008-01-24 | Andreas Christel | Production Of A High-Molecular Polycondensate |
| CN102775970A (en) * | 2012-07-12 | 2012-11-14 | 中国海洋石油总公司 | Weak-gel synthetic drilling fluid and preparation method thereof |
| CN105086956A (en) * | 2015-08-28 | 2015-11-25 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | Tackifier for oil-based drilling fluid and preparation method therefor |
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2020
- 2020-06-11 CN CN202010531030.0A patent/CN113801642A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080019882A1 (en) * | 2004-08-25 | 2008-01-24 | Andreas Christel | Production Of A High-Molecular Polycondensate |
| CN102775970A (en) * | 2012-07-12 | 2012-11-14 | 中国海洋石油总公司 | Weak-gel synthetic drilling fluid and preparation method thereof |
| CN105086956A (en) * | 2015-08-28 | 2015-11-25 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | Tackifier for oil-based drilling fluid and preparation method therefor |
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Application publication date: 20211217 |