CN112682009B - Sand-proof screen pipe for oil well and preparation method - Google Patents
Sand-proof screen pipe for oil well and preparation method Download PDFInfo
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- CN112682009B CN112682009B CN201910986888.3A CN201910986888A CN112682009B CN 112682009 B CN112682009 B CN 112682009B CN 201910986888 A CN201910986888 A CN 201910986888A CN 112682009 B CN112682009 B CN 112682009B
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Abstract
The invention discloses an oil well sand control screen pipe and a preparation method thereof. The sand control screen pipe comprises a pipe body and a coating; the coating is prepared by soaking, brushing or spraying the coating treatment liquid on the pipe body; the coating treatment liquid consists of an organic silicon compound, a silane coupling agent, a cosolvent and a solvent, wherein the content of the organic silicon compound is 0.1-50%, the content of the silane coupling agent is 0.1-30% and the content of the cosolvent is 0.1-10% by weight of the solvent of 100%. The sand control screen pipe can reduce the adsorption of polymers, crude oil, clay and other substances on the surface of the screen pipe and improve the flow conductivity of the screen pipe, and has the advantages of simple formula, low field application condition, low construction cost and long lasting effect.
Description
Technical Field
The invention relates to the technical field of crude oil development, in particular to an oil well sand control screen pipe and a preparation method thereof.
Background
Petroleum is an important natural resource and a national strategic material. With the development of socio-economic, the demand for crude oil is increasing. In order to improve the oil and gas recovery efficiency, various oil displacement technologies are developed, such as profile control by using polymers and expansion of swept volume; the oil washing capacity is improved by using surfactant flooding; foam channeling sealing, VES profile control and flooding integration and the like, and the integration and application of the technologies greatly improve the crude oil development efficiency.
However, many problems are faced in the process of oil field development, the sand production of the oil well is one of the main problems in the process of oil gas exploitation, and the sand production problem is widely existed in the production of various oil fields at home and abroad. The sand production not only can cause the sand burying of an oil guiding layer to cause the reduction of the yield of an oil well, but also can greatly reduce the service life of underground and ground equipment, greatly increase the workload of tool and equipment maintenance, thereby increasing the production cost of crude oil, so the sand prevention work of the oil-gas well becomes very important in the development of the oil field. The sand control by using mechanical pipe columns such as wire-wrapped screen pipes and the like is one of the commonly used technical means in oil fields,
chinese patent CN108843280a provides a sand control screen, which comprises: the side wall of the pipe body is provided with an accommodating cavity, the wall of the accommodating cavity is provided with a first overflowing hole and a second overflowing hole, the first overflowing hole is communicated with the outside of the pipe body, and the second overflowing hole is communicated with the inside of the pipe body; and a metal bead group including a plurality of metal beads, disposed in the accommodating chamber, with a flow gap formed between the metal beads, and the first and second flow holes communicated through the flow gap. The sand control screen pipe adopts the metal beads as a filter medium, and improves the filtering and sand blocking effects and the erosion corrosion resistance and the plugging resistance of the sand control screen pipe by utilizing the sphericity, the acid solubility, the crushing resistance and the like of the metal beads.
Chinese patent CN109441408A discloses a sand control screen pipe, which comprises an inner screen pipe and an outer screen pipe, wherein the outer screen pipe is sleeved outside the inner screen pipe, a first screen mesh layer and a second screen mesh layer are arranged between the inner screen pipe and the outer screen pipe, corrosion-resistant layers are respectively arranged on the inner walls of the inner screen pipe and the outer screen pipe, the inner screen pipe comprises a protective outer shell layer, a sand control screen mesh layer, a gravel filling layer and a slotted screen pipe layer from outside to inside, at least one group of filter slots are axially formed in the outer screen pipe, and each group of filter slots comprises a plurality of slot strips.
Above patent has just improved the structure of sand control screen pipe, but in loose sandstone oil reservoir, often because stratum fluid carries the thin sand in stratum, chemical flooding polymer, crude oil, clay argillaceous interact, blocks up sand control screen pipe, leads to the screen pipe permeability to reduce, and the productivity seriously descends.
Therefore, it is urgently needed to develop a technical method for improving the liquid production capacity of the sand control screen pipe.
Disclosure of Invention
The invention provides an oil well sand control screen pipe and a preparation method thereof, aiming at solving the problem that the oil well sand control screen pipe in the prior art influences the liquid production capacity of the sand control screen pipe due to the fact that substances such as polymers, crude oil clay and the like are adsorbed and gathered on the surface of the screen pipe to block a gap channel. The sand control screen pipe can reduce the adsorption of polymers, crude oil, clay and other substances on the surface of the screen pipe and improve the flow conductivity of the screen pipe, and has the advantages of simple formula, low field application condition, low construction cost and long lasting effect.
One of the objects of the present invention is to provide an oil well sand control screen.
The sand control screen pipe comprises a pipe body and a coating;
the coating is prepared by soaking, brushing or spraying the coating treatment liquid on the tube body;
the coating treatment liquid consists of an organic silicon compound, a silane coupling agent, a cosolvent and a solvent;
wherein, based on the weight of the solvent as 100 percent,
the content of the organic silicon compound is 0.1 to 50 percent, preferably 5 to 35 percent;
the content of the silane coupling agent is 0.1-30%, preferably 3-15%;
the content of the cosolvent is 0.1-10%, preferably 2-8%;
the organic silicon compound is one or a combination of hydroxyl silicone oil, hydrogen-containing silicone oil, hydroxyl fluorine-containing polysiloxane, fluorine-containing alkyl trialkoxysilane and alkyl trialkoxysilane.
The content of hydroxyl in the selected hydroxyl silicone oil is preferably 0.5-5%; the hydrogen content in the hydrogen-containing silicone oil is preferably 0.1-3%.
The fluorine-containing alkyl of the fluorine-containing alkyl trialkoxysilane is partially fluorinated or perfluorinated alkyl or cycloalkyl with the carbon number of 1-18; the alkoxy group is selected from methoxy or ethoxy.
The alkyl of the alkyl trialkoxysilane is alkyl or cycloalkyl with the carbon number of 1-18; the alkoxy is selected from one or more of methoxy and ethoxy.
The silane coupling agent is selected from one of aminoethyl methyldimethoxysilane, aminopropyltrimethoxysilane, aminopropyltriethoxysilane, aminoethyl aminopropylmethyldimethoxysilane and aminopropylmethyldimethoxysilane.
The cosolvent is selected from one or a combination of methanol, ethanol, isopropanol, propanol, acetone, diethyl ether and acetonitrile;
the solvent is one or a combination of alkane, cyclane, benzene, toluene and ethylbenzene with 5-8 carbon atoms.
The invention also aims to provide a preparation method of the oil well sand control screen pipe.
The method comprises the following steps:
1) Dissolving an organic silicon compound, a silane coupling agent and a cosolvent in a solvent according to the using amounts, and stirring and mixing to prepare a coating treatment solution; preferably, stirring at room temperature for 2 hours;
2) And brushing or spraying the coating treatment liquid on the surface of the sand control screen pipe, or soaking the sand control screen pipe in the coating treatment liquid, and drying at room temperature or heating for curing to obtain the oil well sand control screen pipe.
Among them, the curing temperature is preferably 50 to 120 ℃.
Specifically, a surface coating is constructed on the surface of the sand control screen pipe by soaking, brushing and spraying, the sand control screen pipe is dried at room temperature or heated and cured at a high temperature of 50-120 ℃, and the sand control screen pipe subjected to coating treatment is applied through normal construction.
According to the invention, the organic silicon micromolecules and the silane coupling agent are adopted to act together to form the modified coating on the surface of the sand control screen pipe of the oil well, so that the adsorption of low polymers, crude oil, clay and other substances on the surface of the screen pipe is reduced in the stratum, and the flow conductivity of the screen pipe is improved, thereby increasing the liquid production capacity of the oil well and improving the economic benefit. The technology has the outstanding advantages of simple selected formula, low field application condition, no change of the original fracturing construction technical parameters, effective control of process cost and improvement of economic benefit.
Detailed Description
The present invention will be further described with reference to the following examples.
The starting materials used in the examples are all commercially available.
Example 1
100g of methyltriethoxysilicone oil, 35g of aminopropylmethyldimethoxysilane and 1g of ethanol were added to 1kg of cyclohexane and mixed uniformly to prepare a coating treatment liquid 1a.
And (3) soaking the sand control screen pipe in the treatment fluid 1a for 5 minutes, draining, and curing in an oven at 80 ℃ for 5 hours to obtain the screen pipe after coating treatment, wherein the thickness of the coating is 15 microns.
Through detection, the sand control screen pipe after the coating treatment is soaked in a mixed aqueous solution containing 3% of montmorillonite and 0.2% of polyacrylamide, and the result shows that: the surface of the sand control screen pipe after treatment is not easy to be adhered by silt particles, and has good anti-blocking capability.
Example 2
340g of methylhydroxysilicone oil (hydroxyl group content: 5%), 35g of aminoethyl aminopropyl methyldimethoxysilane and 11g of methanol were added to 1kg of octane and mixed uniformly to prepare a coating treatment liquid 2a.
And (3) spraying the treatment liquid 2a on the surface of the sand control screen pipe, and curing for 4 hours in an oven at 120 ℃ to obtain the screen pipe after coating treatment, wherein the thickness of the coating is 45 microns.
Through detection, the sand control screen pipe after the coating treatment is soaked in a mixed aqueous solution containing 3% of montmorillonite and 0.2% of polyacrylamide, and the result shows that: the surface of the sand control screen pipe after treatment is not easy to be adhered by silt particles, and has good anti-blocking capability.
Example 3
350g of methylhydroxy silicone oil (hydroxyl content: 1.5%), 45g of aminopropyltriethoxysilane, and 10g of methanol were added to 1kg of n-hexane and mixed uniformly to prepare a coating treatment liquid 3a.
And (3) soaking the sand control screen pipe in the treatment fluid 3a for 4 minutes, draining, and curing in an oven at 60 ℃ for 5 hours to obtain the screen pipe after coating treatment. The coating thickness was 50 μm.
Through detection, the sand control screen pipe after the coating treatment is soaked in a mixed aqueous solution containing 3% of montmorillonite and 0.2% of polyacrylamide, and the result shows that: the surface of the sand control screen pipe after treatment is not easy to be adhered by silt particles, and has good anti-blocking capability.
Example 4
200g of hydrogen-containing silicone oil (hydrogen content: 3%), 15g of aminoethyl methyldimethoxysilane, and 20g of ethanol were added to 1kg of pentane, and the mixture was mixed uniformly to prepare a coating treatment liquid 4a.
And spraying the treatment liquid 4a on the surface of the sand control screen pipe, and airing for 2 days at room temperature to obtain the treated screen pipe. The coating thickness was 26 μm.
Through detection, the sand control screen pipe after the coating treatment is soaked in a mixed aqueous solution containing 3% of montmorillonite and 0.2% of polyacrylamide, and the result shows that: the surface of the sand control screen pipe after treatment is not easy to be adhered by silt particles, and has good anti-blocking capability.
Example 5
1g of methylhydroxysilicone oil (hydroxyl group content: 5%), 1g of aminopropyltrimethoxysilane and 100g of acetone were added to 1kg of toluene and mixed uniformly to prepare a coating treatment liquid 5a.
And (3) spraying treatment liquid 5a on the surface of the sand control screen pipe, and curing for 5 hours in an oven at 100 ℃ to obtain the treated screen pipe. The coating thickness was 0.1. Mu.m.
Through detection, the sand control screen pipe after the coating treatment is soaked in a mixed aqueous solution containing 3% of montmorillonite and 0.2% of polyacrylamide, and the result shows that: the surface of the sand control screen pipe after treatment is not easy to be adhered by silt particles, and has good anti-blocking capability.
Example 6
500g of fluorinated pentyltriethoxysilane, 300g of aminoethylaminopropylmethyldimethoxysilane and 100g of ethanol were added to 1kg of pentane, and the mixture was uniformly mixed to prepare a coating treatment liquid 6a.
And (3) spraying treatment liquid 6a on the surface of the sand control screen pipe, and curing for 8 hours in an oven at 100 ℃ to obtain the treated screen pipe. The coating thickness was 40 μm.
Through detection, the sand control screen pipe after the coating treatment is soaked in a mixed aqueous solution containing 3% of montmorillonite and 0.2% of polyacrylamide, and the result shows that: the surface of the sand control screen pipe after treatment is not easy to be adhered by silt particles, and has good anti-blocking capability.
Example 7
380g of hydrogen-containing silicone oil (hydrogen content: 0.1%), 24g of aminoethyl aminopropyl methyldimethoxysilane and 10g of propanol were added to 1kg of n-hexane and mixed uniformly to prepare a coating treatment liquid 7a.
And (3) spraying treatment liquid 7a on the surface of the sand control screen pipe, and curing for 6 hours in an oven at 60 ℃ to obtain the treated screen pipe. The coating thickness was 15 μm.
Through detection, the sand control screen pipe after the coating treatment is soaked in a mixed aqueous solution containing 3% of montmorillonite and 0.2% of polyacrylamide, and the result shows that: the surface of the sand control screen pipe after treatment is not easy to be adhered by silt particles, and has good anti-blocking capability.
Example 8
To 1kg of n-hexane, 260g of methylhydroxysilicone oil (hydroxyl content: 0.5%), 16g of aminopropyltrimethoxysilane and 12g of acetonitrile were added and mixed uniformly to prepare a coating treatment liquid 8a.
And (3) soaking the sand control screen pipe in the treatment fluid 8a for 6 minutes, draining, and curing in an oven at 60 ℃ for 5 hours to obtain the treated screen pipe. The coating thickness was 24 μm.
Through detection, the sand control screen pipe after the coating treatment is soaked in a mixed aqueous solution containing 3% of montmorillonite and 0.2% of polyacrylamide, and the result shows that: the surface of the sand control screen pipe after treatment is not easy to be adhered by silt particles, and has good anti-blocking capability.
Example 9
200g of hydrogen-containing silicone oil (hydrogen content: 0.16%), 20g of aminoethyl methyldimethoxysilane, and 12g of ethanol were added to 1kg of ethylbenzene, and the mixture was mixed uniformly to prepare a coating treatment liquid 9a.
And (3) spraying treatment liquid 9a on the surface of the sand control screen pipe, and curing for 6 hours in an oven at 120 ℃ to obtain the treated screen pipe. The coating thickness was 18 μm.
Through detection, the sand control screen pipe after the coating treatment is soaked in a mixed aqueous solution containing 3% of montmorillonite and 0.2% of polyacrylamide, and the result shows that: the surface of the sand control screen pipe after treatment is not easy to be adhered by silt particles, and has good anti-blocking capability.
Example 10
460g of hydroxyl fluorine-containing polysiloxane, 46g of aminopropyltrimethoxysilane and 20g of isopropanol were added to 1kg of pentane and mixed uniformly to prepare a coating treatment liquid 10a.
And (3) spraying the treatment liquid 10a on the surface of the sand control screen pipe, and curing for 5 hours in an oven at 120 ℃ to obtain the treated screen pipe. The coating thickness was 20 μm.
Through detection, the sand control screen pipe after the coating treatment is soaked in a mixed aqueous solution containing 3% of montmorillonite and 0.2% of polyacrylamide, and the result shows that: the surface of the sand control screen pipe after treatment is not easy to be adhered by silt particles, and has good anti-blocking capability.
Comparative example 1
The sand control screen pipe which is not subjected to coating treatment is placed in a mixed aqueous solution containing 3% of montmorillonite and 0.2% of polyacrylamide for soaking, and the result shows that: the surface of the sand control screen pipe which is not treated has obvious attached silt particles, and the crack channel of the screen pipe part is blocked.
The above description is only for the preferred embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention disclosed in the present invention should be covered within the protection scope of the present invention.
Claims (8)
1. An oil well sand control screen pipe which is characterized in that:
the sand control screen pipe comprises a pipe body and a coating;
the coating is prepared by soaking, brushing or spraying the coating treatment liquid on the pipe body;
the coating treatment liquid consists of an organic silicon compound, a silane coupling agent, a cosolvent and a solvent, wherein the weight of the solvent is 100%, the content of the organic silicon compound is 0.1-50%, the content of the silane coupling agent is 0.1-30%, and the content of the cosolvent is 0.1-10%;
the organic silicon compound is one or a combination of hydroxyl silicone oil, hydrogen-containing silicone oil, hydroxyl fluorine-containing polysiloxane, fluorine-containing alkyl trialkoxysilane and alkyl trialkoxysilane;
the silane coupling agent is selected from one of aminoethyl methyldimethoxysilane, aminopropyltrimethoxysilane, aminopropyltriethoxysilane, aminoethyl aminopropylmethyldimethoxysilane and aminopropylmethyldimethoxysilane;
the cosolvent is selected from one or a combination of methanol, ethanol, isopropanol, propanol, acetone, diethyl ether and acetonitrile;
the solvent is selected from one or a combination of alkane, cyclane, benzene, toluene and ethylbenzene with 5-8 carbon atoms.
2. The oil well sand control screen of claim 1, wherein:
in the coating treatment liquid, the weight of a solvent is 100%, the content of an organic silicon compound is 5% -35%, the content of a silane coupling agent is 3% -15%, and the content of a cosolvent is 2% -8%.
3. The oil well sand control screen of claim 1, wherein:
the thickness of the coating is 0.1 to 50 μm.
4. The oil well sand control screen of claim 1, wherein:
the hydroxyl content of the selected hydroxyl silicone oil is 0.5-5%; the hydrogen content in the hydrogen-containing silicone oil is 0.1% -3%.
5. The oil well sand control screen of claim 4, wherein:
the fluorine-containing alkyl of the fluorine-containing alkyl trialkoxysilane is partially fluorinated or perfluorinated alkyl or cycloalkyl with the carbon number of 1-18;
the alkoxy group is selected from methoxy or ethoxy.
6. The oil well sand control screen of claim 4, wherein:
the alkyl of the alkyl trialkoxysilane is alkyl or cycloalkyl with the carbon number of 1-18;
the alkoxy is selected from one or a combination of methoxy and ethoxy.
7. A method of making an oil well sand screen according to any one of claims 1~6, comprising:
1) Dissolving an organic silicon compound, a silane coupling agent and a cosolvent in a solvent according to the dosage, and stirring and mixing to prepare a coating treatment solution;
2) And (3) coating or spraying the coating treatment liquid on the surface of the sand control screen pipe, or soaking the sand control screen pipe in the coating treatment liquid, and drying at room temperature or heating for curing to obtain the oil well sand control screen pipe.
8. The method of claim 7, wherein:
the curing temperature is 50-120 ℃.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910986888.3A CN112682009B (en) | 2019-10-17 | 2019-10-17 | Sand-proof screen pipe for oil well and preparation method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910986888.3A CN112682009B (en) | 2019-10-17 | 2019-10-17 | Sand-proof screen pipe for oil well and preparation method |
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| CN112682009B true CN112682009B (en) | 2023-03-03 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116004119B (en) * | 2021-10-22 | 2024-03-26 | 中国石油化工股份有限公司 | Sand control screen pipe for oil well and preparation method and application thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9104402D0 (en) * | 1991-03-01 | 1991-04-17 | Alcan Int Ltd | Composition for surface treatment |
| CN103159431A (en) * | 2012-12-26 | 2013-06-19 | 北京仁创科技集团有限公司 | High-strength sand prevention casing pipe with high perpetration rate |
| CN103881675A (en) * | 2012-12-19 | 2014-06-25 | 中国石油化工股份有限公司 | Long-acting active sand-controlling oil washing agent and preparation method thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7727940B2 (en) * | 2006-06-06 | 2010-06-01 | Halliburton Energy Services, Inc. | Silicone-tackifier matrixes and methods of use thereof |
| US8261833B2 (en) * | 2009-02-25 | 2012-09-11 | Halliburton Energy Services, Inc. | Methods and compositions for consolidating particulate matter in a subterranean formation |
| WO2017127191A1 (en) * | 2016-01-21 | 2017-07-27 | Baker Hughes Incorporated | Well screens and methods to reduce screen plugging |
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2019
- 2019-10-17 CN CN201910986888.3A patent/CN112682009B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9104402D0 (en) * | 1991-03-01 | 1991-04-17 | Alcan Int Ltd | Composition for surface treatment |
| CN103881675A (en) * | 2012-12-19 | 2014-06-25 | 中国石油化工股份有限公司 | Long-acting active sand-controlling oil washing agent and preparation method thereof |
| CN103159431A (en) * | 2012-12-26 | 2013-06-19 | 北京仁创科技集团有限公司 | High-strength sand prevention casing pipe with high perpetration rate |
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