CN115991981A - Modified film-forming type scouring-resistant emulsion and application thereof - Google Patents
Modified film-forming type scouring-resistant emulsion and application thereof Download PDFInfo
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- 238000009991 scouring Methods 0.000 title claims abstract description 49
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 30
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- 238000001556 precipitation Methods 0.000 claims abstract description 20
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 17
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- 239000002086 nanomaterial Substances 0.000 claims abstract description 15
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- 238000000034 method Methods 0.000 claims description 14
- FFUAGWLWBBFQJT-UHFFFAOYSA-N hexamethyldisilazane Chemical compound C[Si](C)(C)N[Si](C)(C)C FFUAGWLWBBFQJT-UHFFFAOYSA-N 0.000 claims description 12
- 230000002265 prevention Effects 0.000 claims description 12
- 239000004530 micro-emulsion Substances 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- 238000012986 modification Methods 0.000 claims description 7
- 230000004048 modification Effects 0.000 claims description 7
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 6
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- 238000002347 injection Methods 0.000 claims description 6
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- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 6
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- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 125000004432 carbon atom Chemical group C* 0.000 description 3
- 238000011161 development Methods 0.000 description 3
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
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- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 1
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical compound OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical class [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- 229940123973 Oxygen scavenger Drugs 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
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- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 description 1
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- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 1
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 1
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- 238000009738 saturating Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
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Abstract
The invention belongs to the technical field of petrochemical industry, and particularly relates to a modified film-forming type scouring-resistant emulsion and application thereof. The preparation method comprises the following raw materials: film-forming type scouring-resistant sand control agent emulsion, nano silicon dioxide, surface-modified hydrophobic nano material, fluorosilicone resin and organic solvent. The modified film-forming type anti-scouring emulsion disclosed by the invention has a hydrophobic angle of more than 110 degrees after film formation, the water-oil resistance is more than 3 compared with the NFRR value, the comprehensive water content of an oil well can be reduced by 50%, water can be better controlled, a hydrophobic film can be formed immediately after the emulsion is extruded into a bottom layer, the action radius can be expanded to tens of meters, and the effective period of precipitation and oil increase is obviously prolonged.
Description
Technical Field
The invention belongs to the technical field of petrochemical industry, and particularly relates to a modified film-forming type scouring-resistant emulsion and application thereof.
Background
In the middle and later stages of oil field development, the water content is rapidly increased, taking the winning oil field as an example, the comprehensive water content is 95%, the oil field productivity is seriously affected, and in addition, the great energy waste and environmental pollution are caused by lifting a large amount of stratum water, so that the economic benefit and the social benefit are affected, in the conventional gravel packing sand prevention process of the oil field, quartz sand or fracturing ceramsite with oil-water selectivity is often used as a filling medium, and precipitation and oil increase are realized after the oil field is filled into an oil layer, but the following defects or shortages exist at the same time: (1) the grain diameter of the filled quartz sand is 0.4-0.8mm, the water-oil resistance is lower than the NFRR value, and is about 2 in general; (2) the method is concentrated in a filling zone, and the left and right radii are small (3), so that the oil well precipitation, oil increase and stable production period is short, the cost is increased, and the development efficiency or economic benefit is influenced.
Chinese patent application CN112625665A is a fly ash suspension stable blocking profile control agent and a preparation method thereof. The fly ash suspension stable blocking profile control agent consists of the following components in percentage by mass: 10-40% of fly ash, 2.5-5.0% of suspension stabilizer, 0-2% of suspension stabilizer auxiliary agent, 0.05-0.4% of dispersing agent and the balance of water.
Chinese patent No. 109369848B is a functional temperature-resistant and salt-resistant plugging agent, comprising: functional acrylamide prepolymer, a cross-linking agent, a stabilizer, a performance regulator, an oxygen scavenger and water.
Chinese patent application CN112696178A discloses a sand control precipitation method for high water content oil well, which comprises squeezing appropriate amount of sand control precipitation particles, and then performing gravel packing sand control construction, so that sand control precipitation particles are solidified to form a plugging layer under the condition of not polluting an oil layer, large pore canal formed by water injection or side bottom water is plugged, and gravel and screen pipe form a high-diversion sand blocking belt. According to the method, a composite gravel filling mode is adopted, sand prevention precipitation particles are combined with quartz sand used for mechanical sand prevention, sand blocking barriers capable of solidifying the sand prevention precipitation particles to form oil seepage and water blocking are filled first, then multi-particle-size quartz sand is used for filling to form high-permeability sand blocking barriers, the advantages of two sand prevention technologies are integrated, the dual effects of effective precipitation and effective sand prevention are achieved, the purposes of sand prevention, precipitation and oil increment are achieved, and the production requirements of a high water content period are met.
There is still a need to provide new materials for more efficient dewatering and oil-production in oil fields.
Disclosure of Invention
The invention mainly aims to provide a modified film-forming type anti-scouring emulsion and application thereof. The modified film-forming type scouring-resistant emulsion can effectively reduce comprehensive water content of an oil well while preventing sand, and has remarkable dewatering and oil increasing effects.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the invention provides a modified film-forming type scouring-resistant emulsion, which comprises the following raw materials: film-forming type scouring-resistant sand control agent emulsion, nano silicon dioxide, surface-modified hydrophobic nano material, fluorosilicone resin and organic solvent. The film-forming type scouring-resistant sand control agent emulsion is prepared by a method described in a prior invention patent CN108728071B of the applicant.
Further, the modified film-forming type scouring-resistant emulsion is prepared from the following raw materials in parts by weight: 100-150 parts of film-forming type scouring-resistant sand control agent emulsion, 1-3 parts of nano silicon dioxide, 1-3 parts of surface-modified hydrophobic nano material, 3-5 parts of fluorosilicone resin and 5-10 parts of organic solvent.
Further, the surface-modified hydrophobic nanomaterial is: the surface modification material is obtained by mixing nano zinc oxide or nano silicon dioxide and hexamethyldisilazane and then reacting at 120-150 ℃ for 2-5 h.
The organic solvent comprises a mixed solution of one or more organic solvents.
Alcohols containing carbon atoms of 1 to 16 carbon atoms such as methanol, ethanol, isopropanol and the like and isomers thereof, benzene and derivatives thereof, formic acid, acetic acid and the like, and the solvents of the present invention include, but are not limited to, the above-mentioned organic solvents.
The invention also provides a preparation method of the modified film-forming type anti-scouring emulsion, and the raw materials are mixed and then react for 15-60min at 100-150 ℃.
The invention also provides application of the modified film-forming type scouring-resistant emulsion in sand prevention, precipitation and oil increment of an oil well.
The invention provides a sand prevention, precipitation and oil increment method for an oil well, which comprises the following steps: and injecting the modified film-forming type anti-scouring emulsion into an oil well.
Further, the modified film-forming anti-scouring emulsion is injected alternately with the same volume of aqueous solution or oilfield sewage with the mass concentration of salt of 1-10% by adopting a multi-stage plug alternate injection mode.
The method further comprises the step of adding a pre-liquid before adding the modified film-forming type anti-scouring emulsion; the pre-liquid is prepared from water, micro emulsion and hydrochloric acid; and (3) directly injecting the modified film-forming scouring-resistant emulsion into oilfield sewage or sand-carrying fluid with the volume of more than 2 times of the modified film-forming scouring-resistant emulsion. The pad fluid is used for cleaning the filling layer and the oil layer, and simultaneously, soluble minerals such as hydrochloride acid carbonate and the like generate a large amount of bivalent calcium and magnesium ion salt solution which is beneficial to the precipitation of modified film-forming anti-scouring emulsion into a film.
Further, the volume percentage of the micro emulsion in the pre-solution is 1.5-1.9%, the volume percentage of the hydrochloric acid is 13.3-22.5%, and the balance is water. The preparation method of the micro emulsion is prepared by referring to patent CN 200610009675.8.
Compared with the prior art, the invention has the following advantages:
the modified film-forming type anti-scouring emulsion disclosed by the invention has a hydrophobic angle of more than 110 degrees after film formation, the water-oil resistance is more than 3 compared with the NFRR value, the comprehensive water content of an oil well can be reduced by 50%, water can be better controlled, a hydrophobic film can be formed immediately after the emulsion is extruded into a bottom layer, the action radius can be expanded to tens of meters, and the effective period of precipitation and oil increase is obviously prolonged. The modified film-forming type anti-scouring emulsion realizes effective water control while preventing sand, is particularly suitable for high-water-content gas wells and gas-containing oil wells, prolongs the stable production period of the oil wells, reduces the production cost and improves the development efficiency or economic benefit.
The modified film-forming type scour-resistant emulsion is applied to oil well water control and sand prevention, and has the characteristics of safety, environment friendliness, simplicity in construction, instant film formation, large film formation radius and the like, and has high popularization and application value and strong applicability.
Drawings
FIG. 1 is a schematic diagram of a hydrophilic base layer structure of a double-base film layer formed by the modified film-forming type anti-scouring emulsion: 1. polyamide main chain network, 2. Hydrophilic nano silicon dioxide, 3. Long carbon hydrophobic chain;
FIG. 2 is a schematic diagram of a hydrophobic layer structure of a double-base membrane layer formed by the modified membrane-forming type anti-scouring emulsion: 1. long carbon hydrophobic chain, 2. Hydrophobically modified nano silica;
FIG. 3 is a state diagram showing the existence of water drops formed by precipitation of the modified film-forming anti-scouring emulsion according to the embodiment 1 of the invention;
FIG. 4 is a SAE image of the modified film-forming anti-scour emulsion according to example 1 of the present invention.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present invention. As used herein, the singular forms also are intended to include the plural forms unless the context clearly indicates otherwise, and furthermore, it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, and/or combinations thereof.
In order to enable those skilled in the art to more clearly understand the technical scheme of the present invention, the technical scheme of the present invention will be described in detail with reference to specific embodiments.
Example 1
A modified film-forming type scouring-resistant emulsion is prepared from the following raw materials in parts by weight: 120 parts of film-forming type scouring-resistant sand control agent emulsion, 2 parts of nano silicon dioxide, 2 parts of surface-modified hydrophobic nano material, 4 parts of fluorosilicone resin and 8 parts of C14 mixed alcohol. The above raw materials are mixed and then reacted at 100 ℃ for 25min.
The C14 mixed alcohol is a mixture of higher alcohol with 14 carbon atoms and isomers thereof, the volume percentage of normal C14 is 30 percent, and the rest is isomers.
The preparation method of the film-forming type scouring-resistant sand control agent emulsion is as described in an embodiment 1 of an invention patent CN 108728071B.
The surface-modified hydrophobic nanomaterial is as follows: the nano silicon dioxide and hexamethyldisilazane are mixed according to the mass ratio of 1:2 and then react for 2 hours at 140 ℃ to obtain the surface modification material.
Example 2
A modified film-forming type scouring-resistant emulsion is prepared from the following raw materials in parts by weight: 100 parts of film-forming type scouring-resistant sand control agent emulsion, 3 parts of nano silicon dioxide, 3 parts of surface-modified hydrophobic nano material, 5 parts of fluorosilicone resin and 10 parts of isopropanol. The above raw materials are mixed and then reacted at 100 ℃ for 60min.
The preparation method of the film-forming type scouring-resistant sand control agent emulsion is as described in an embodiment 1 of an invention patent CN 108728071B.
The surface-modified hydrophobic nanomaterial is as follows: the nano zinc oxide and hexamethyldisilazane are mixed according to the mass ratio of 1:2 and then react for 5 hours at 120 ℃ to obtain the surface modification material.
Example 3
A modified film-forming type scouring-resistant emulsion is prepared from the following raw materials in parts by weight: 150 parts of film-forming type scouring-resistant sand control agent emulsion, 1 part of nano silicon dioxide, 1 part of surface-modified hydrophobic nano material, 3 parts of fluorosilicone resin, 5 parts of toluene and 5 parts of isopropanol. The above raw materials are mixed and then reacted at 150 ℃ for 15min.
The preparation method of the film-forming type scouring-resistant sand control agent emulsion is as described in an embodiment 1 of an invention patent CN 108728071B.
The surface-modified hydrophobic nanomaterial is as follows: the nano silicon dioxide and hexamethyldisilazane are mixed according to the mass ratio of 1:2 and then react for 2 hours at 150 ℃ to obtain the surface modification material.
Example 4
A modified film-forming type scouring-resistant emulsion is prepared from the following raw materials in parts by weight: 110 parts of film-forming type scouring-resistant sand control agent emulsion, 3 parts of nano silicon dioxide, 2 parts of surface-modified hydrophobic nano material, 4 parts of fluorosilicone resin, 4 parts of acetic acid and 6 parts of ethanol. The above raw materials are mixed and then reacted at 100 ℃ for 25min.
The preparation method of the film-forming type scouring-resistant sand control agent emulsion is as described in an embodiment 1 of an invention patent CN 108728071B.
The surface-modified hydrophobic nanomaterial is as follows: the nano silicon dioxide and hexamethyldisilazane are mixed according to the mass ratio of 1:2 and then react for 2 hours at 140 ℃ to obtain the surface modification material.
The modified film-forming type anti-scouring emulsion described in examples 1-4 is subjected to demulsification by using 10% saline water to form a double-base film layer with strengthened hydrophobic groups and hydrophilic groups, and performance evaluation is performed (see table 1), wherein the water control capacity (phase permeability and permeability adjusting capacity) of the modified film-forming type anti-scouring emulsion after precipitation film formation can be represented by a dimensionless fluid resistance ratio (NFRR). Effects of phase permeability modifier on water and oil two-phase permeability flow capacity Rfw, rfo is expressed as:
NFRR is used as a main measure:
rfw =pre/post kw treatment (1)
Rfo=pre-ko/post-ko treatment (2)
NFRR＝Rfw/Rfo
Immersing the prepared rock core into a beaker before the test, exposing one end of the rock core to the liquid level slightly, and vacuumizing (vacuum degree 0.09 Mpa) and saturating with 2% saline; simulating the temperature and pressure of a stratum, adjusting the confining pressure of a displacement device to 8MPa, the back pressure to 0.5MPa and the pump speed to 5.0ml/min, and firstly measuring the water phase permeability and the oil phase permeability of untreated quartz sand; measuring the water phase permeability and the oil phase permeability of the treated quartz sand; calculating a result according to the NFRR formula; and the displacement device measures the values, and the calculated NFRR value is more than or equal to 3 and is qualified.
Table 1 evaluation results of displacement experiments after precipitation of modified film-forming anti-scour emulsion into film
Example 5
A method for sand prevention, precipitation and oil increment of an oil well, which comprises the following steps:
1) The pad fluid is used for cleaning the filling layer and the oil layer; the pre-solution consists of micro emulsion, hydrogen chloride and water, wherein the micro emulsion is 1.7% by volume, the hydrochloric acid is 18.5% by volume and the balance is water; the hydrochloric acid is industrial hydrochloric acid, and the concentration is 31wt%.
The preparation method of the micro emulsion refers to patent CN200610009675.8: 2 parts of a 40% solution of sodium dodecyl benzene sulfonate; fatty alcohol ether sodium sulfate SLESN70 parts; 15 parts of sec-butyl alcohol; 20 parts of mixed benzene (toluene and xylene are mixed according to the volume ratio of 1:1); 60 parts of water.
The injection amount of the pre-liquid is determined by the following calculation:
wherein r is i -design radius (unit: m); r is (r) w -wellbore radius (units: m); phi-average porosity of the oil layer; h-oil layer thickness (unit: m).
2) The modified film-forming anti-scouring emulsion and petroleum sewage described in example 1 are injected alternately by adopting a 3-slug alternate injection mode.
3) d) directly injecting sand-carrying fluid with the injection volume of 2 times of modified film-forming type anti-scouring emulsion.
The construction was carried out in DXX 681, DXY13-97, QTQ9-10, QTQ-43 wells by the method described in example 5, respectively, and the construction results are shown in Table 2.
Table 2 effects of sand control well implementation in oil field
The above examples are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above examples, and any other changes, modifications, substitutions, combinations, and simplifications that do not depart from the spirit and principle of the present invention should be made in the equivalent manner, and the embodiments are included in the protection scope of the present invention.
Claims (10)
1. The modified film-forming type scouring-resistant emulsion is characterized by comprising the following raw materials: film-forming type scouring-resistant sand control agent emulsion, nano silicon dioxide, surface-modified hydrophobic nano material, fluorosilicone resin and organic solvent.
2. The modified film-forming type anti-scouring emulsion according to claim 1, which is characterized by comprising the following raw materials in parts by weight: 100-150 parts of film-forming type scouring-resistant sand control agent emulsion, 1-3 parts of nano silicon dioxide, 1-3 parts of surface-modified hydrophobic nano material, 3-5 parts of fluorosilicone resin and 5-10 parts of organic solvent.
3. The modified film-forming wash-resistant emulsion of claim 1 or 2, wherein the surface-modified hydrophobic nanomaterial is: the surface modification material is obtained by mixing nano zinc oxide or nano silicon dioxide and hexamethyldisilazane and then reacting at 120-150 ℃ for 2-5 h.
4. The modified film-forming wash-resistant emulsion of claim 1 or 2, wherein the organic solvent is a mixture of one or more organic solvents.
5. The method for preparing a modified film-forming type anti-scouring emulsion according to any one of claims 1 to 4, wherein the raw materials are mixed and then reacted at 100 to 150 ℃ for 15 to 60 minutes.
6. Use of the modified film-forming anti-scour emulsion of any one of claims 1-4 in sand control, precipitation and oil enhancement of an oil well.
7. A method for sand prevention, precipitation and oil increment of an oil well, which is characterized by comprising the following steps: injecting the modified film-forming anti-scour emulsion of any one of claims 1-4 into an oil well.
8. The method according to claim 7, wherein the modified film-forming anti-scour emulsion according to any one of claims 1 to 4 is injected alternately with an equal volume of aqueous solution or oilfield sewage having a salt concentration of 1 to 10% by mass by means of a multistage plug alternate injection.
9. The method of claim 7, further comprising adding a pad prior to adding the modified film-forming wash-resistant emulsion; the pre-liquid is prepared from water, micro emulsion and hydrochloric acid;
the modified film-forming anti-scouring emulsion according to any one of claims 1-4 is injected and then directly injected into oilfield sewage or sand-carrying fluid with a volume which is 2 times or more than that of the modified film-forming anti-scouring emulsion.
10. The method of claim 9, wherein the volume percentage of the microemulsion in the pre-solution is 1.5-1.9%, the volume percentage of the hydrochloric acid is 13.3-22.5%, and the balance is water.
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| Publication number | Priority date | Publication date | Assignee | Title |
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