CN110452675A - A kind of oil-soluble sealing agent and its preparation method and application method - Google Patents
A kind of oil-soluble sealing agent and its preparation method and application method Download PDFInfo
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- CN110452675A CN110452675A CN201910639040.3A CN201910639040A CN110452675A CN 110452675 A CN110452675 A CN 110452675A CN 201910639040 A CN201910639040 A CN 201910639040A CN 110452675 A CN110452675 A CN 110452675A
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- 238000007789 sealing Methods 0.000 title claims abstract description 175
- 238000002360 preparation method Methods 0.000 title claims abstract description 59
- 238000000034 method Methods 0.000 title claims abstract description 13
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 221
- 239000010426 asphalt Substances 0.000 claims abstract description 77
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 56
- 230000035699 permeability Effects 0.000 claims abstract description 55
- 239000011435 rock Substances 0.000 claims abstract description 52
- 239000010779 crude oil Substances 0.000 claims abstract description 40
- 239000002121 nanofiber Substances 0.000 claims abstract description 38
- 239000000230 xanthan gum Substances 0.000 claims abstract description 36
- 229920001285 xanthan gum Polymers 0.000 claims abstract description 36
- 229940082509 xanthan gum Drugs 0.000 claims abstract description 36
- 235000010493 xanthan gum Nutrition 0.000 claims abstract description 36
- 239000004094 surface-active agent Substances 0.000 claims abstract description 30
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 27
- 239000002253 acid Substances 0.000 claims abstract description 24
- 238000003756 stirring Methods 0.000 claims description 94
- 239000000203 mixture Substances 0.000 claims description 71
- 238000002156 mixing Methods 0.000 claims description 50
- 238000006243 chemical reaction Methods 0.000 claims description 36
- 238000001816 cooling Methods 0.000 claims description 32
- 238000010438 heat treatment Methods 0.000 claims description 26
- 238000005553 drilling Methods 0.000 claims description 16
- 239000007788 liquid Substances 0.000 claims description 16
- 239000002245 particle Substances 0.000 claims description 16
- 238000007493 shaping process Methods 0.000 claims description 16
- 238000012545 processing Methods 0.000 claims description 6
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 4
- 239000000194 fatty acid Substances 0.000 claims description 4
- 229930195729 fatty acid Natural products 0.000 claims description 4
- 150000004665 fatty acids Chemical class 0.000 claims description 4
- RCEAADKTGXTDOA-UHFFFAOYSA-N OS(O)(=O)=O.CCCCCCCCCCCC[Na] Chemical compound OS(O)(=O)=O.CCCCCCCCCCCC[Na] RCEAADKTGXTDOA-UHFFFAOYSA-N 0.000 claims description 3
- 235000021355 Stearic acid Nutrition 0.000 claims description 3
- 235000019864 coconut oil Nutrition 0.000 claims description 3
- 239000003240 coconut oil Substances 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 3
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 3
- 239000008117 stearic acid Substances 0.000 claims description 3
- 238000010792 warming Methods 0.000 claims description 3
- 125000001931 aliphatic group Chemical group 0.000 claims 2
- 239000003921 oil Substances 0.000 abstract description 11
- 230000020477 pH reduction Effects 0.000 abstract description 10
- 230000008901 benefit Effects 0.000 abstract description 6
- 230000006378 damage Effects 0.000 abstract description 6
- 239000003129 oil well Substances 0.000 abstract description 6
- 238000011161 development Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000009471 action Effects 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 21
- 230000003213 activating effect Effects 0.000 description 14
- 238000004898 kneading Methods 0.000 description 13
- 239000010410 layer Substances 0.000 description 11
- 235000019198 oils Nutrition 0.000 description 10
- 238000011084 recovery Methods 0.000 description 10
- 239000007789 gas Substances 0.000 description 7
- 239000002086 nanomaterial Substances 0.000 description 6
- 150000001338 aliphatic hydrocarbons Chemical class 0.000 description 5
- 239000002585 base Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 3
- 239000002981 blocking agent Substances 0.000 description 3
- 230000032798 delamination Effects 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 239000012188 paraffin wax Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- HECLRDQVFMWTQS-UHFFFAOYSA-N Dicyclopentadiene Chemical compound C1C2C3CC=CC3C1C=C2 HECLRDQVFMWTQS-UHFFFAOYSA-N 0.000 description 2
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 150000002191 fatty alcohols Chemical class 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000008719 thickening Effects 0.000 description 2
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 239000002671 adjuvant Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000003712 anti-aging effect Effects 0.000 description 1
- 238000004500 asepsis Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
Classifications
-
- 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
- C09K8/56—Compositions for consolidating loose sand or the like around wells without excessively decreasing the permeability thereof
- C09K8/565—Oil-based compositions
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Materials Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Geochemistry & Mineralogy (AREA)
- Sealing Material Composition (AREA)
Abstract
The present embodiments relate to oil-soluble sealing agent and its preparation method and application methods.It is made of the component of following mass percent: C9Petropols 40%~50%, asphalt 20%~25%, rock asphalt 10%~15%, xanthan gum 5%~10%, nanofiber 4%~8%, surfactant 2%~6%.Oil-soluble sealing agent of the invention has drawn the advantages of water-soluble water shutoff agent and acid-soluble water shutoff agent, while avoiding the disadvantage that water-soluble water shutoff agent is difficult to voluntarily de-plugging and acid-soluble water shutoff agent protects oil-gas Layer ineffective.It forces acid solution to enter tight formation while playing water shutoff agent plugging action, achievees the purpose that acid solution shunting, homogeneous acidification.When bringing in, oil-soluble water shutoff agent can dissolve in crude oil again automatically, be discharged with crude oil, in-place permeability is restored, and improves the production capacity of oil reservoir, and be safe from harm to environment and staff's body, meets oil well future water shutoff agent development trend.
Description
Technical field
The present invention relates to a kind of oil-soluble sealing agent and its preparation method and application methods, especially suitable for blocking high permeability formation
And effectively start low-permeability layer.
Background technique
Currently, China land oil gas field, which has 80% or more, to be developed in a manner of water filling.Long-term continuous waterflooding extraction,
Lead to later stage in exploitation, will appear oil field comprehensive moisture content rising, oilfield exploitation benefit be deteriorated the phenomenon that.Excessively high contains
Water results even in oil gas field and " water logging " phenomenon occurs, harm have it is very much, including used in the process of waterflooding extraction to set
The fouling of standby corroded pipeline is obvious, and the working efficiency of pump for pumping well reduces, ring caused by the damage and outlet to oil-gas Layer
Border pollution etc..
For this status, acidizing unblocking technique achieves more apparent increasing yield and injection effect, for multilayer shape oil gas
Hiding or the storage serious reservoir of interlayer contradiction are acidified, and the selection of process is particularly significant.As (1) is hurt for one
The discrepant stratified reservoir of degree, not only can not be to serious wound if be blindly generally acidified because injectability has differences
Evil layer carries out effective de-plugging, can increase the difference of longitudinal permeability instead.(2) for the be hurt different multilayer of degree or single layer
Relatively thin reservoir, using mechanical delamination acidification, not only time-consuming, laborious, cost is larger, simultaneously because conventional acid solution filter loss is big, has
Effect acidification distance is very short.So mechanical delamination is acidified the reservoir for being only applicable near wellbore zone.
In order to avoid the deficiency of mechanical delamination acidification, water blockoff Acidizing Technology is proposed, not only may be used using water blockoff Acidizing Technology
To efficiently solve the acidification de-plugging problem of each layer difference chocking-up degree of big thick-layer vertical heterogeneity and stratified reservoir, Er Qieyou
Conducive to restoring and improve longitudinal oil entry profile or intake profile, therefore water blockoff acidification is a kind of simple and effective and easy acidification
Technology.
The core technology of water blockoff acidification is water shutoff agent, and oil-soluble water shutoff agent is because of its water plugging rate height, and plugging strength is big, in oil well
When operation, and crude oil can be dissolved in automatically, be discharged with crude oil, the advantages that effective protection oil-gas Layer and as common water shutoff agent.
However, the raw material of traditional oil-soluble water shutoff agent is usually that rosin, oil soluble polyurethane blocking agent material, DCPD(add
Hydrogen Petropols), paraffin etc., but rosin and its modified species water shutoff agent are small to reservoir injury, be only applicable to calcic in water, magnesium from
The sub- biggish oil well of content and its price is higher, it is difficult to large-scale use；Oil soluble polyurethane blocking agent material is swift in response with water
(3min starts to react at room temperature), viscosity sharply increases after reaction, and mobility is caused to be deteriorated, and brings many to transport and construction
It is inconvenient；DCPD function admirable but its price is higher, and have certain toxicity, to the health of worker, there are potential hazards；Paraffin
Although moderate and asepsis environment-protecting, the softening point of paraffin is very low, and performance is very unstable at high temperature, should reduce as far as possible its
Content in formula.
Summary of the invention
Embodiment of the present invention provides a kind of oil-soluble sealing agent and its preparation method and application method, purpose first is that
It solves the problems, such as the existing pollution environment of oil-soluble water shutoff agent, endanger workers ' health；Purpose two, which is to provide, to be produced on a large scale
Preparation method.
In order to solve the above technical problems, the present invention provides a kind of oil-soluble sealing agents, by the group of following mass percent
Part composition:
C9Petropols 40%~50%；
Asphalt 20%~25%；
Rock asphalt 10%~15%；
Xanthan gum 5%~10%；
Nanofiber 4%~8%；
Surfactant 2%~6%.
Further, the present invention also provides a kind of preparation methods of oil-soluble sealing agent, comprising the following steps:
Asphalt, rock asphalt are added in kneader by step S1 by formula ratio, heating stirring to be uniformly mixed；
Step S2 continues that C is added into kneader9Petropols stop stirring when miscible stirring is to default viscosity, are formed mixed
Close object A；
Step S3 takes mixture A, xanthan gum, surfactant, the nanofiber of formula ratio to be added to reaction kettle, constantly stirs
It mixes and the heating that heats up stops stirring, obtain mixture B after cooling when the system in reaction kettle is cross-linked to predeterminable level；
Step S4 handles mixture B, obtains oil-soluble sealing agent.
Further, the present invention also provides a kind of application methods of oil-soluble sealing agent, comprising the following steps:
Step 1 puts into the oil-soluble sealing agent of preparation in the reservoir being acidified to water blockoff；
Step 2, when drilling well liquid columnpressure is greater than strata pressure in well, oil-soluble sealing agent is preferentially squeezed into permeability and exists
The high permeability formation of 200mD or more, and under 65 DEG C~130 DEG C of formation temperature, oil-soluble sealing agent softens, deforms, and blocks up
Rock gap and throat are filled in, temporarily stifled band is formed, acid solution is forced to enter permeability in the tight formation of 1mD~50mD；
Step 3 brings in, and oil-soluble sealing agent dissolves in crude oil automatically, is discharged with crude oil.
Preferably, asphalt is No. 130 asphalt.
Preferably, nanofiber is houghite class nano material, and the diameter of fiber is 70nm~100nm, and length is 10 μ
m。
Preferably, surfactant is the surfactant of aliphatic hydrocarbon base class, selects coco-nut oil fatty acid, stearic acid, height
Any one of grade fatty alcohol, lauryl sodium sulfate.
Further, heating stirring described in step S1 refers to that heating temperature is 130 DEG C~150 DEG C to uniformly mixed, stirs
Mixing speed is 3000r/min~3500r/min.
Preferably, miscible stirring described in step S2 is to default viscosity, the speed of mixing be maintained at 3500r/min~
4000r/min, presetting viscosity is 0.8PaS.
Further, be stirred continuously described in step S3 and the heating that heats up, until the system in reaction kettle be cross-linked to it is default
Degree stops stirring and refers to the mixing speed for keeping 3500r/min~4000r/min, is warming up to 150 DEG C~170 DEG C, is cross-linked to
Stop stirring when system from colloidal sol rotation structure becomes gel-type structure and viscosity reaches 1.0PaS.
Preferably, there are two types of processing modes for the tool of processing mixture B described in step S4, are that mixture B is put into mould respectively
The oil-soluble sealing agent of required shape is made in tool, and the mixture B after cooling and shaping is squeezed out to obtain through single screw extruder
The oil-soluble sealing agent particle of required diameter.
Beneficial effects of the present invention are as follows:
Oil-soluble sealing agent prepared by the present invention has drawn the advantages of water-soluble sealing agent and acid-soluble sealing agent, avoids simultaneously
The disadvantage that water-soluble sealing agent is difficult to voluntarily de-plugging and acid-soluble sealing agent protects oil-gas Layer ineffective.Playing sealing agent envelope
It forces acid solution to enter tight formation while stifled effect, achievees the purpose that acid solution shunting, homogeneous acidification.When bringing in
When, oil-soluble sealing agent can dissolve in crude oil again automatically, be discharged with crude oil, in-place permeability is restored, and improves oil reservoir
Production capacity, and be safe from harm to environment and staff's body, meet oil well future sealing agent development trend.
Specific embodiment
Embodiments of the present invention are illustrated by particular specific embodiment below, those skilled in the art can be by this specification
Revealed content is understood other advantages and efficacy of the present invention easily.
The present invention can be implemented with many different forms, and be not limited to the embodiment described herein, provide this
A little embodiments are and sufficiently to convey this to person of ordinary skill in the field at large and fully disclose the present invention
The range of invention.
Unless otherwise indicated, term (including scientific and technical terminology) used herein has person of ordinary skill in the field
It is common to understand meaning.Further it will be understood that with the term that usually used dictionary limits, should be understood as and its
The context of related fields has consistent meaning, and is not construed as Utopian or too formal meaning.
The present invention provides a kind of oil-soluble sealing agents, are made of the component of following mass percent:
C9Petropols 40%~50%；
Asphalt 20%~25%；
Rock asphalt 10%~15%；
Xanthan gum 5%~10%；
Nanofiber 4%~8%；
Surfactant 2%~6%.
Further, the present invention also provides a kind of preparation methods of oil-soluble sealing agent, comprising the following steps:
Asphalt, rock asphalt are added in kneader by step S1 by formula ratio, heating stirring to be uniformly mixed；
Step S2 continues that C is added into kneader9Petropols stop stirring when miscible stirring is to default viscosity, are formed mixed
Close object A；
Step S3 takes mixture A, xanthan gum, surfactant, the nanofiber of formula ratio to be added to reaction kettle, constantly stirs
It mixes and the heating that heats up stops stirring, obtain mixture B after cooling when the system in reaction kettle is cross-linked to predeterminable level；
Step S4 handles mixture B, obtains oil-soluble sealing agent.
Further, the present invention also provides a kind of application methods of oil-soluble sealing agent, comprising the following steps:
Step 1 puts into the oil-soluble sealing agent of preparation in the reservoir being acidified to water blockoff；
Step 2, when drilling well liquid columnpressure is greater than strata pressure in well, oil-soluble sealing agent is preferentially squeezed into permeability and exists
The high permeability formation of 200mD or more, and under 65 DEG C~130 DEG C of formation temperature, oil-soluble sealing agent softens, deforms, and blocks up
Rock gap and throat are filled in, temporarily stifled band is formed, forces acid solution to enter permeability in the tight formation of 1mD~50mD, mD is
The unit of permeability, also referred to as millidarcy；
Step 3 brings in, and oil-soluble sealing agent dissolves in crude oil automatically, is discharged with crude oil.
Preferably, asphalt is No. 130 asphalt.
Preferably, nanofiber is houghite class nano material, and the diameter of fiber is 70nm~100nm, and length is 10 μ
m。
Preferably, surfactant is the surfactant of aliphatic hydrocarbon base class.
Further, heating stirring described in step S1 refers to that heating temperature is 130 DEG C~150 DEG C to uniformly mixed, stirs
Mixing speed is 3000r/min~3500r/min.It should be noted that the content of rock asphalt is higher, required temperature is got in step S1
Greatly, but maximum is not above 170 DEG C, and blistering otherwise can be generated in whipping process, splash with, while revolving speed being required to be not more than
4000r/min。
Preferably, miscible stirring described in step S2 is to default viscosity, the speed of mixing be maintained at 3500r/min~
4000r/min, presetting viscosity is 0.8PaS.
Further, be stirred continuously described in step S3 and the heating that heats up, until the system in reaction kettle be cross-linked to it is default
Degree stops stirring and refers to the mixing speed for keeping 3500r/min~4000r/min, is warming up to 150 DEG C~170 DEG C, is cross-linked to
Stop stirring when system from colloidal sol rotation structure becomes gel-type structure and viscosity reaches 1.0PaS.
Preferably, there are two types of processing modes for the tool of processing mixture B described in step S4, are that mixture B is put into mould respectively
The oil-soluble sealing agent of required shape is made in tool, and the mixture B after cooling and shaping is squeezed out to obtain through single screw extruder
The oil-soluble sealing agent particle of required diameter.
It is important to note that the C in following embodiment9Petropols are self-control or commercially available, C9Petroleum tree
Not polar functionalities in the molecular structure of rouge, make its have in hydrocarbon solvent excellent dissolubility, water resistance, resistance to acid and alkali and
Light fastness aging, and China C9(carbon nine) resource is relatively abundanter, is mainly used as fuel and cheap outlet at present, therefore select here
Low permeability pay can be applicable in but also reduce sealing agent cost, improve the C of comprehensive utilization of resources9(carbon nine) resin and modified pitch
For primary raw material, xanthan gum, nanofiber and surfactant are that adjuvant carrys out the excellent oil-soluble sealing agent of synthesis performance.
Why following embodiment selects asphalt as the matrix pitch of modified pitch, is because of asphalt
Oil solution ratio is good, preferable with other resin compatibles and cheap；In addition, rock asphalt can be shown as matrix pitch modifying agent
The softening point for improving modified pitch is write, after being added to asphalt, cooperates C9Petropols can be such that the sealing agent of preparation has
Better resistant to high temperatures, anti-aging property.
Xanthan gum has significant effect, specifically, the addition of xanthan gum in terms of thickening, thickening, salt resistance and antipollution
It can not only make sealing agent system that there is good saline-alkaline tolerance, simultaneously for the viscosity for improving sealing agent system, be processed into solid
Body has to help well.
In following embodiment, what nanofiber was selected is acrylic/hydrotalcite-like nano material, significantly increases the note of blocking agent
Enter depth.It is noted that surfactant was selected is the table of aliphatic hydrocarbon base class in order to reduce the preparation cost of sealing agent
Face activating agent, specifically, the surfactant of aliphatic hydrocarbon base class are fatty acids, such as: coco-nut oil fatty acid, stearic acid, advanced
Any one of fatty alcohol, lauryl sodium sulfate.
Acrylic/hydrotalcite-like nano material and aliphatic hydrocarbon base class surfactant can play the role of wettability reversal, simultaneously for
Dispersion performance under system high-temperature has important stabilization.Specifically, acrylic/hydrotalcite-like nano material can regard a kind of tool as
There is the nano material of layer structure, and be often referred to as layered double hydroxide, usually by two or more valence
The different skill element composition of state, and there is layer structure, it can make by oneself or commercially available.
First embodiment
Present embodiments provide for a kind of oil-soluble sealing agents, are made of the component of following mass percent:
C9Petropols 50%, No. 130 asphalt 25%, rock asphalt 10%, xanthan gum 5%, nanofiber 4%, surfactant
6%。
Further, the preparation method of the oil-soluble sealing agent in present embodiment, comprising the following steps:
Step S1 takes the rock asphalt that No. 130 asphalt, mass percents that mass percent is 25% are 10% to be added to kneading
In machine, 130 DEG C at a temperature of, with the mixing speed of 3000r/min stir to be uniformly mixed；
Step S2 continues that mass percent is added into kneader to be 50%C9Petropols keep the stirring speed of 4000r/min
When spending miscible stirring to 0.8PaS viscosity, stop stirring, forms mixture A；
Step S3, takes that mixture A, mass percent that mass percent is 85% are 5% xanthan gum, mass percent is 6% surface
Activating agent, mass percent are that 4% nanofiber is added to reaction kettle, and the mixing speed of 4000r/min is kept to be stirred continuously simultaneously
Heating is heated to 150 DEG C, until the system in reaction kettle is cross-linked to system and becomes gel-type structure and viscosity from colloidal sol rotation structure
When reaching 1.0PaS, stops stirring, obtain mixture B after cooling；
Mixture B is put into the oil-soluble sealing agent that required shape is made in mold by step S4, or by the mixing after cooling and shaping
Object B squeezes out to obtain the oil-soluble sealing agent particle of required diameter through single screw extruder.
Specifically, the oil-soluble sealing agent of present embodiment preparation apply: by the oil-soluble sealing agent of preparation
It puts into the reservoir being acidified to water blockoff；When drilling well liquid columnpressure is greater than strata pressure in well, the preferential quilt of oil-soluble sealing agent
Squeezing into high permeability, (on the stratum of 200mD or more), and under 65 DEG C~130 DEG C of formation temperature, oil-soluble blocks permeability
Agent softens, deformation, blocks rock gap and throat, forms temporarily stifled band, force acid solution enter low-permeability (permeability 1mD~
50mD) stratum；It brings in, oil-soluble sealing agent dissolves in crude oil automatically, is discharged with crude oil.
Second embodiment
Present embodiments provide for a kind of oil-soluble sealing agents, are made of the component of following mass percent:
C9Petropols 50%, No. 130 asphalt 20%, rock asphalt 15%, xanthan gum 5%, nanofiber 4%, surfactant
6%。
Further, the preparation method of the oil-soluble sealing agent in present embodiment, comprising the following steps:
Step S1 takes the rock asphalt that No. 130 asphalt, mass percents that mass percent is 20% are 15% to be added to kneading
In machine, 135 DEG C at a temperature of, with the mixing speed of 3200r/min stir to be uniformly mixed；
Step S2 continues that mass percent is added into kneader to be 50%C9Petropols keep the stirring speed of 3600r/min
When spending miscible stirring to 0.8PaS viscosity, stop stirring, forms mixture A；
Step S3, takes that mixture A, mass percent that mass percent is 85% are 5% xanthan gum, mass percent is 6% surface
Activating agent, mass percent are that 4% nanofiber is added to reaction kettle, and the mixing speed of 3600r/min is kept to be stirred continuously simultaneously
Heating is heated to 160 DEG C, until the system in reaction kettle is cross-linked to system and becomes gel-type structure and viscosity from colloidal sol rotation structure
When reaching 1.0PaS, stops stirring, obtain mixture B after cooling；
Mixture B is put into the oil-soluble sealing agent that required shape is made in mold by step S4, or by the mixing after cooling and shaping
Object B squeezes out to obtain the oil-soluble sealing agent particle of required diameter through single screw extruder.
Specifically, the oil-soluble sealing agent of present embodiment preparation apply: by the oil-soluble sealing agent of preparation
It puts into the reservoir being acidified to water blockoff；When drilling well liquid columnpressure is greater than strata pressure in well, the preferential quilt of oil-soluble sealing agent
Squeezing into high permeability, (on the stratum of 200mD or more), and under 65 DEG C~130 DEG C of formation temperature, oil-soluble blocks permeability
Agent softens, deformation, blocks rock gap and throat, forms temporarily stifled band, force acid solution enter low-permeability (permeability 1mD~
50mD) stratum；It brings in, oil-soluble sealing agent dissolves in crude oil automatically, is discharged with crude oil.
Third embodiment
Present embodiments provide for a kind of oil-soluble sealing agents, are made of the component of following mass percent:
C9Petropols 45%, No. 130 asphalt 25%, rock asphalt 15%, xanthan gum 5%, nanofiber 4%, surfactant
6%。
Further, the preparation method of the oil-soluble sealing agent in present embodiment, comprising the following steps:
Step S1 takes the rock asphalt that No. 130 asphalt, mass percents that mass percent is 25% are 15% to be added to kneading
In machine, 150 DEG C at a temperature of, with the mixing speed of 3300r/min stir to be uniformly mixed；
Step S2 continues that mass percent is added into kneader to be 45%C9Petropols keep the stirring speed of 3800r/min
When spending miscible stirring to 0.8PaS viscosity, stop stirring, forms mixture A；
Step S3, takes that mixture A, mass percent that mass percent is 85% are 5% xanthan gum, mass percent is 6% surface
Activating agent, mass percent are that 4% nanofiber is added to reaction kettle, and the mixing speed of 3800r/min is kept to be stirred continuously simultaneously
Heating is heated to 170 DEG C, until the system in reaction kettle is cross-linked to system and becomes gel-type structure and viscosity from colloidal sol rotation structure
When reaching 1.0PaS, stops stirring, obtain mixture B after cooling；
Mixture B is put into the oil-soluble sealing agent that required shape is made in mold by step S4, or by the mixing after cooling and shaping
Object B squeezes out to obtain the oil-soluble sealing agent particle of required diameter through single screw extruder.
Specifically, the oil-soluble sealing agent of present embodiment preparation apply: by the oil-soluble sealing agent of preparation
It puts into the reservoir being acidified to water blockoff；When drilling well liquid columnpressure is greater than strata pressure in well, the preferential quilt of oil-soluble sealing agent
Squeezing into high permeability, (on the stratum of 200mD or more), and under 65 DEG C~130 DEG C of formation temperature, oil-soluble blocks permeability
Agent softens, deformation, blocks rock gap and throat, forms temporarily stifled band, force acid solution enter low-permeability (permeability 1mD~
50mD) stratum；It brings in, oil-soluble sealing agent dissolves in crude oil automatically, is discharged with crude oil.
4th embodiment
Present embodiments provide for a kind of oil-soluble sealing agents, are made of the component of following mass percent:
C9Petropols 40%, No. 130 asphalt 25%, rock asphalt 15%, xanthan gum 10%, nanofiber 8%, surfactant
2%。
Further, the preparation method of the oil-soluble sealing agent in present embodiment, comprising the following steps:
Step S1 takes the rock asphalt that No. 130 asphalt, mass percents that mass percent is 25% are 15% to be added to kneading
In machine, 150 DEG C at a temperature of, with the mixing speed of 3000r/min stir to be uniformly mixed；
Step S2 continues that mass percent is added into kneader to be 40%C9Petropols keep the stirring speed of 3500r/min
When spending miscible stirring to 0.8PaS viscosity, stop stirring, forms mixture A；
Step S3, takes that mixture A, mass percent that mass percent is 80% are 10% xanthan gum, mass percent is 2% table
Face activating agent, mass percent are that 8% nanofiber is added to reaction kettle, and the mixing speed of 3500r/min is kept to be stirred continuously
And heat up and be heated to 165 DEG C, until the system in reaction kettle is cross-linked to system and becomes gel-type structure from colloidal sol rotation structure and glue
When degree reaches 1.0PaS, stops stirring, obtain mixture B after cooling；
Mixture B is put into the oil-soluble sealing agent that required shape is made in mold by step S4, or by the mixing after cooling and shaping
Object B squeezes out to obtain the oil-soluble sealing agent particle of required diameter through single screw extruder.
Specifically, the oil-soluble sealing agent of present embodiment preparation apply: by the oil-soluble sealing agent of preparation
It puts into the reservoir being acidified to water blockoff；When drilling well liquid columnpressure is greater than strata pressure in well, the preferential quilt of oil-soluble sealing agent
Squeezing into high permeability, (on the stratum of 200mD or more), and under 65 DEG C~130 DEG C of formation temperature, oil-soluble blocks permeability
Agent softens, deformation, blocks rock gap and throat, forms temporarily stifled band, force acid solution enter low-permeability (permeability 1mD~
50mD) stratum；It brings in, oil-soluble sealing agent dissolves in crude oil automatically, is discharged with crude oil.
5th embodiment
Present embodiments provide for a kind of oil-soluble sealing agents, are made of the component of following mass percent:
C9Petropols 45%, No. 130 asphalt 25%, rock asphalt 15%, xanthan gum 5%, nanofiber 7%, surfactant
3%。
Further, the preparation method of the oil-soluble sealing agent in present embodiment, comprising the following steps:
Step S1 takes the rock asphalt that No. 130 asphalt, mass percents that mass percent is 25% are 15% to be added to kneading
In machine, 140 DEG C at a temperature of, with the mixing speed of 3000r/min stir to be uniformly mixed；
Step S2 continues that mass percent is added into kneader to be 45%C9Petropols keep the stirring speed of 3500r/min
When spending miscible stirring to 0.8PaS viscosity, stop stirring, forms mixture A；
Step S3, takes that mixture A, mass percent that mass percent is 85% are 5% xanthan gum, mass percent is 3% surface
Activating agent, mass percent are that 7% nanofiber is added to reaction kettle, and the mixing speed of 3500r/min is kept to be stirred continuously simultaneously
Heating is heated to 150 DEG C, until the system in reaction kettle is cross-linked to system and becomes gel-type structure and viscosity from colloidal sol rotation structure
When reaching 1.0PaS, stops stirring, obtain mixture B after cooling；
Mixture B is put into the oil-soluble sealing agent that required shape is made in mold by step S4, or by the mixing after cooling and shaping
Object B squeezes out to obtain the oil-soluble sealing agent particle of required diameter through single screw extruder.
Specifically, the oil-soluble sealing agent of present embodiment preparation apply: by the oil-soluble sealing agent of preparation
It puts into the reservoir being acidified to water blockoff；When drilling well liquid columnpressure is greater than strata pressure in well, the preferential quilt of oil-soluble sealing agent
Squeezing into high permeability, (on the stratum of 200mD or more), and under 65 DEG C~130 DEG C of formation temperature, oil-soluble blocks permeability
Agent softens, deformation, blocks rock gap and throat, forms temporarily stifled band, force acid solution enter low-permeability (permeability 1mD~
50mD) stratum；It brings in, oil-soluble sealing agent dissolves in crude oil automatically, is discharged with crude oil.
Sixth embodiment
Present embodiments provide for a kind of oil-soluble sealing agents, are made of the component of following mass percent:
C9Petropols 42%, No. 130 asphalt 22%, rock asphalt 15%, xanthan gum 10%, nanofiber 6%, surfactant
5%。
Further, the preparation method of the oil-soluble sealing agent in present embodiment, comprising the following steps:
Step S1 takes the rock asphalt that No. 130 asphalt, mass percents that mass percent is 22% are 15% to be added to kneading
In machine, 145 DEG C at a temperature of, with the mixing speed of 3500r/min stir to be uniformly mixed；
Step S2 continues that mass percent is added into kneader to be 42%C9Petropols keep the stirring speed of 4000r/min
When spending miscible stirring to 0.8PaS viscosity, stop stirring, forms mixture A；
Step S3, takes that mixture A, mass percent that mass percent is 79% are 10% xanthan gum, mass percent is 5% table
Face activating agent, mass percent are that 6% nanofiber is added to reaction kettle, and the mixing speed of 4000r/min is kept to be stirred continuously
And heat up and be heated to 155 DEG C, until the system in reaction kettle is cross-linked to system and becomes gel-type structure from colloidal sol rotation structure and glue
When degree reaches 1.0PaS, stops stirring, obtain mixture B after cooling；
Mixture B is put into the oil-soluble sealing agent that required shape is made in mold by step S4, or by the mixing after cooling and shaping
Object B squeezes out to obtain the oil-soluble sealing agent particle of required diameter through single screw extruder.
Specifically, the oil-soluble sealing agent of present embodiment preparation apply: by the oil-soluble sealing agent of preparation
It puts into the reservoir being acidified to water blockoff；When drilling well liquid columnpressure is greater than strata pressure in well, the preferential quilt of oil-soluble sealing agent
Squeezing into high permeability, (on the stratum of 200mD or more), and under 65 DEG C~130 DEG C of formation temperature, oil-soluble blocks permeability
Agent softens, deformation, blocks rock gap and throat, forms temporarily stifled band, force acid solution enter low-permeability (permeability 1mD~
50mD) stratum；It brings in, oil-soluble sealing agent dissolves in crude oil automatically, is discharged with crude oil.
7th embodiment
Present embodiments provide for a kind of oil-soluble sealing agents, are made of the component of following mass percent:
C9Petropols 43%, No. 130 asphalt 24%, rock asphalt 15%, xanthan gum 9%, nanofiber 5%, surfactant
4%。
Further, the preparation method of the oil-soluble sealing agent in present embodiment, comprising the following steps:
Step S1 takes the rock asphalt that No. 130 asphalt, mass percents that mass percent is 24% are 15% to be added to kneading
In machine, 145 DEG C at a temperature of, with the mixing speed of 3500r/min stir to be uniformly mixed；
Step S2 continues that mass percent is added into kneader to be 43%C9Petropols keep the stirring speed of 4000r/min
When spending miscible stirring to 0.8PaS viscosity, stop stirring, forms mixture A；
Step S3, takes that mixture A, mass percent that mass percent is 82% are 9% xanthan gum, mass percent is 4% surface
Activating agent, mass percent are that 5% nanofiber is added to reaction kettle, and the mixing speed of 4000r/min is kept to be stirred continuously simultaneously
Heating is heated to 155 DEG C, until the system in reaction kettle is cross-linked to system and becomes gel-type structure and viscosity from colloidal sol rotation structure
When reaching 1.0PaS, stops stirring, obtain mixture B after cooling；
Mixture B is put into the oil-soluble sealing agent that required shape is made in mold by step S4, or by the mixing after cooling and shaping
Object B squeezes out to obtain the oil-soluble sealing agent particle of required diameter through single screw extruder.
Specifically, the oil-soluble sealing agent of present embodiment preparation apply: by the oil-soluble sealing agent of preparation
It puts into the reservoir being acidified to water blockoff；When drilling well liquid columnpressure is greater than strata pressure in well, the preferential quilt of oil-soluble sealing agent
Squeezing into high permeability, (on the stratum of 200mD or more), and under 65 DEG C~130 DEG C of formation temperature, oil-soluble blocks permeability
Agent softens, deformation, blocks rock gap and throat, forms temporarily stifled band, force acid solution enter low-permeability (permeability 1mD~
50mD) stratum；It brings in, oil-soluble sealing agent dissolves in crude oil automatically, is discharged with crude oil.
8th embodiment
Present embodiments provide for a kind of oil-soluble sealing agents, are made of the component of following mass percent:
C9Petropols 44%, No. 130 asphalt 22%, rock asphalt 11%, xanthan gum 6%, nanofiber 8%, surfactant
6%。
Further, the preparation method of the oil-soluble sealing agent in present embodiment, comprising the following steps:
Step S1 takes the rock asphalt that No. 130 asphalt, mass percents that mass percent is 22% are 11% to be added to kneading
In machine, 140 DEG C at a temperature of, with the mixing speed of 3500r/min stir to be uniformly mixed；
Step S2 continues that mass percent is added into kneader to be 44%C9Petropols keep the stirring speed of 3500r/min
When spending miscible stirring to 0.8PaS viscosity, stop stirring, forms mixture A；
Step S3, takes that mixture A, mass percent that mass percent is 77% are 6% xanthan gum, mass percent is 6% surface
Activating agent, mass percent are that 8% nanofiber is added to reaction kettle, and the mixing speed of 3500r/min is kept to be stirred continuously simultaneously
Heating is heated to 150 DEG C, until the system in reaction kettle is cross-linked to system and becomes gel-type structure and viscosity from colloidal sol rotation structure
When reaching 1.0PaS, stops stirring, obtain mixture B after cooling；
Mixture B is put into the oil-soluble sealing agent that required shape is made in mold by step S4, or by the mixing after cooling and shaping
Object B squeezes out to obtain the oil-soluble sealing agent particle of required diameter through single screw extruder.
Specifically, the oil-soluble sealing agent of present embodiment preparation apply: by the oil-soluble sealing agent of preparation
It puts into the reservoir being acidified to water blockoff；When drilling well liquid columnpressure is greater than strata pressure in well, the preferential quilt of oil-soluble sealing agent
Squeezing into high permeability, (on the stratum of 200mD or more), and under 65 DEG C~130 DEG C of formation temperature, oil-soluble blocks permeability
Agent softens, deformation, blocks rock gap and throat, forms temporarily stifled band, force acid solution enter low-permeability (permeability 1mD~
50mD) stratum；It brings in, oil-soluble sealing agent dissolves in crude oil automatically, is discharged with crude oil.
9th embodiment
Present embodiments provide for a kind of oil-soluble sealing agents, are made of the component of following mass percent:
C9Petropols 45%, No. 130 asphalt 23%, rock asphalt 12%, xanthan gum 7%, nanofiber 7%, surfactant
6%。
Further, the preparation method of the oil-soluble sealing agent in present embodiment, comprising the following steps:
Step S1 takes the rock asphalt that No. 130 asphalt, mass percents that mass percent is 23% are 12% to be added to kneading
In machine, 145 DEG C at a temperature of, with the mixing speed of 3500r/min stir to be uniformly mixed；
Step S2 continues that mass percent is added into kneader to be 45%C9Petropols keep the stirring speed of 4000r/min
When spending miscible stirring to 0.8PaS viscosity, stop stirring, forms mixture A；
Step S3, takes that mixture A, mass percent that mass percent is 80% are 7% xanthan gum, mass percent is 6% surface
Activating agent, mass percent are that 7% nanofiber is added to reaction kettle, and the mixing speed of 4000r/min is kept to be stirred continuously simultaneously
Heating is heated to 155 DEG C, until the system in reaction kettle is cross-linked to system and becomes gel-type structure and viscosity from colloidal sol rotation structure
When reaching 1.0PaS, stops stirring, obtain mixture B after cooling；
Mixture B is put into the oil-soluble sealing agent that required shape is made in mold by step S4, or by the mixing after cooling and shaping
Object B squeezes out to obtain the oil-soluble sealing agent particle of required diameter through single screw extruder.
Specifically, the oil-soluble sealing agent of present embodiment preparation apply: by the oil-soluble sealing agent of preparation
It puts into the reservoir being acidified to water blockoff；When drilling well liquid columnpressure is greater than strata pressure in well, the preferential quilt of oil-soluble sealing agent
Squeezing into high permeability, (on the stratum of 200mD or more), and under 65 DEG C~130 DEG C of formation temperature, oil-soluble blocks permeability
Agent softens, deformation, blocks rock gap and throat, forms temporarily stifled band, force acid solution enter low-permeability (permeability 1mD~
50mD) stratum；It brings in, oil-soluble sealing agent dissolves in crude oil automatically, is discharged with crude oil.
Tenth embodiment
Present embodiments provide for a kind of oil-soluble sealing agents, are made of the component of following mass percent:
C9Petropols 46%, No. 130 asphalt 21%, rock asphalt 13%, xanthan gum 8%, nanofiber 8%, surfactant
4%。
Further, the preparation method of the oil-soluble sealing agent in present embodiment, comprising the following steps:
Step S1 takes the rock asphalt that No. 130 asphalt, mass percents that mass percent is 21% are 13% to be added to kneading
In machine, 150 DEG C at a temperature of, with the mixing speed of 3500r/min stir to be uniformly mixed；
Step S2 continues that mass percent is added into kneader to be 46%C9Petropols keep the stirring speed of 4000r/min
When spending miscible stirring to 0.8PaS viscosity, stop stirring, forms mixture A；
Step S3, takes that mixture A, mass percent that mass percent is 80% are 8% xanthan gum, mass percent is 4% surface
Activating agent, mass percent are that 8% nanofiber is added to reaction kettle, and the mixing speed of 4000r/min is kept to be stirred continuously simultaneously
Heating is heated to 160 DEG C, until the system in reaction kettle is cross-linked to system and becomes gel-type structure and viscosity from colloidal sol rotation structure
When reaching 1.0PaS, stops stirring, obtain mixture B after cooling；
Mixture B is put into the oil-soluble sealing agent that required shape is made in mold by step S4, or by the mixing after cooling and shaping
Object B squeezes out to obtain the oil-soluble sealing agent particle of required diameter through single screw extruder.
Specifically, the oil-soluble sealing agent of present embodiment preparation apply: by the oil-soluble sealing agent of preparation
It puts into the reservoir being acidified to water blockoff；When drilling well liquid columnpressure is greater than strata pressure in well, the preferential quilt of oil-soluble sealing agent
Squeezing into high permeability, (on the stratum of 200mD or more), and under 65 DEG C~130 DEG C of formation temperature, oil-soluble blocks permeability
Agent softens, deformation, blocks rock gap and throat, forms temporarily stifled band, force acid solution enter low-permeability (permeability 1mD~
50mD) stratum；It brings in, oil-soluble sealing agent dissolves in crude oil automatically, is discharged with crude oil.
11st embodiment
Present embodiments provide for a kind of oil-soluble sealing agents, are made of the component of following mass percent:
C9Petropols 47%, No. 130 asphalt 20%, rock asphalt 14%, xanthan gum 9%, nanofiber 5%, surfactant
5%。
Further, the preparation method of the oil-soluble sealing agent in present embodiment, comprising the following steps:
Step S1 takes the rock asphalt that No. 130 asphalt, mass percents that mass percent is 20% are 14% to be added to kneading
In machine, 150 DEG C at a temperature of, with the mixing speed of 3500r/min stir to be uniformly mixed；
Step S2 continues that mass percent is added into kneader to be 47%C9Petropols keep the stirring speed of 4000r/min
When spending miscible stirring to 0.8PaS viscosity, stop stirring, forms mixture A；
Step S3, takes that mixture A, mass percent that mass percent is 81% are 9% xanthan gum, mass percent is 5% surface
Activating agent, mass percent are that 5% nanofiber is added to reaction kettle, and the mixing speed of 4000r/min is kept to be stirred continuously simultaneously
Heating is heated to 165 DEG C, until the system in reaction kettle is cross-linked to system and becomes gel-type structure and viscosity from colloidal sol rotation structure
When reaching 1.0PaS, stops stirring, obtain mixture B after cooling；
Mixture B is put into the oil-soluble sealing agent that required shape is made in mold by step S4, or by the mixing after cooling and shaping
Object B squeezes out to obtain the oil-soluble sealing agent particle of required diameter through single screw extruder.
Specifically, the oil-soluble sealing agent of present embodiment preparation apply: by the oil-soluble sealing agent of preparation
It puts into the reservoir being acidified to water blockoff；When drilling well liquid columnpressure is greater than strata pressure in well, the preferential quilt of oil-soluble sealing agent
Squeezing into high permeability, (on the stratum of 200mD or more), and under 65 DEG C~130 DEG C of formation temperature, oil-soluble blocks permeability
Agent softens, deformation, blocks rock gap and throat, forms temporarily stifled band, force acid solution enter low-permeability (permeability 1mD~
50mD) stratum；It brings in, oil-soluble sealing agent dissolves in crude oil automatically, is discharged with crude oil.
12nd embodiment
Present embodiments provide for a kind of oil-soluble sealing agents, are made of the component of following mass percent:
C9Petropols 48%, No. 130 asphalt 23%, rock asphalt 10%, xanthan gum 8%, nanofiber 6%, surfactant
5%。
Further, the preparation method of the oil-soluble sealing agent in present embodiment, comprising the following steps:
Step S1 takes the rock asphalt that No. 130 asphalt, mass percents that mass percent is 23% are 10% to be added to kneading
In machine, 135 DEG C at a temperature of, with the mixing speed of 3000r/min stir to be uniformly mixed；
Step S2 continues that mass percent is added into kneader to be 48%C9Petropols keep the stirring speed of 3500r/min
When spending miscible stirring to 0.8PaS viscosity, stop stirring, forms mixture A；
Step S3, takes that mixture A, mass percent that mass percent is 81% are 8% xanthan gum, mass percent is 5% surface
Activating agent, mass percent are that 6% nanofiber is added to reaction kettle, and the mixing speed of 3500r/min is kept to be stirred continuously simultaneously
Heating is heated to 140 DEG C, until the system in reaction kettle is cross-linked to system and becomes gel-type structure and viscosity from colloidal sol rotation structure
When reaching 1.0PaS, stops stirring, obtain mixture B after cooling；
Mixture B is put into the oil-soluble sealing agent that required shape is made in mold by step S4, or by the mixing after cooling and shaping
Object B squeezes out to obtain the oil-soluble sealing agent particle of required diameter through single screw extruder.
Specifically, the oil-soluble sealing agent of present embodiment preparation apply: by the oil-soluble sealing agent of preparation
It puts into the reservoir being acidified to water blockoff；When drilling well liquid columnpressure is greater than strata pressure in well, the preferential quilt of oil-soluble sealing agent
Squeezing into high permeability, (on the stratum of 200mD or more), and under 65 DEG C~130 DEG C of formation temperature, oil-soluble blocks permeability
Agent softens, deformation, blocks rock gap and throat, forms temporarily stifled band, force acid solution enter low-permeability (permeability 1mD~
50mD) stratum；It brings in, oil-soluble sealing agent dissolves in crude oil automatically, is discharged with crude oil.
13rd embodiment
Present embodiments provide for a kind of oil-soluble sealing agents, are made of the component of following mass percent:
C9Petropols 49%, No. 130 asphalt 24%, rock asphalt 13%, xanthan gum 7%, nanofiber 4%, surfactant
3%。
Further, the preparation method of the oil-soluble sealing agent in present embodiment, comprising the following steps:
Step S1 takes the rock asphalt that No. 130 asphalt, mass percents that mass percent is 24% are 13% to be added to kneading
In machine, 155 DEG C at a temperature of, with the mixing speed of 3500r/min stir to be uniformly mixed；
Step S2 continues that mass percent is added into kneader to be 49%C9Petropols keep the stirring speed of 4000r/min
When spending miscible stirring to 0.8PaS viscosity, stop stirring, forms mixture A；
Step S3, takes that mixture A, mass percent that mass percent is 86% are 7% xanthan gum, mass percent is 3% surface
Activating agent, mass percent are that 4% nanofiber is added to reaction kettle, and the mixing speed of 4000r/min is kept to be stirred continuously simultaneously
Heating is heated to 165 DEG C, until the system in reaction kettle is cross-linked to system and becomes gel-type structure and viscosity from colloidal sol rotation structure
When reaching 1.0PaS, stops stirring, obtain mixture B after cooling；
Mixture B is put into the oil-soluble sealing agent that required shape is made in mold by step S4, or by the mixing after cooling and shaping
Object B squeezes out to obtain the oil-soluble sealing agent particle of required diameter through single screw extruder.
Specifically, the oil-soluble sealing agent of present embodiment preparation apply: by the oil-soluble sealing agent of preparation
It puts into the reservoir being acidified to water blockoff；When drilling well liquid columnpressure is greater than strata pressure in well, the preferential quilt of oil-soluble sealing agent
Squeezing into high permeability, (on the stratum of 200mD or more), and under 65 DEG C~130 DEG C of formation temperature, oil-soluble blocks permeability
Agent softens, deformation, blocks rock gap and throat, forms temporarily stifled band, force acid solution enter low-permeability (permeability 1mD~
50mD) stratum；It brings in, oil-soluble sealing agent dissolves in crude oil automatically, is discharged with crude oil.
14th embodiment
Present embodiment chooses first embodiment~the 5th embodiment preparation oil-soluble according to petrochemical industry standard
Sealing agent carries out water plugging rate test and the test of core recovery rate respectively, i.e., carries out water plugging rate and rock to the oil-soluble sealing agent of preparation
The evaluation of core recovery rate, concrete outcome are shown in Table 1.
The oil-soluble sealing agent water plugging rate of the invention of table 1 and the evaluation of core recovery rate
| Embodiment | Water plugging rate (%) | Core recovery rate (%) |
| First embodiment | 96.8 | 98.3 |
| Second embodiment | 96.4 | 98.3 |
| Third embodiment | 95.7 | 98.3 |
| 4th embodiment | 96.1 | 98.5 |
| 5th embodiment | 95.9 | 98.4 |
Meanwhile traditional sealing agent being selected to evaluate the water plugging rate of traditional sealing agent, core recovery rate, concrete outcome is shown in Table 2.
The traditional sealing agent water plugging rate of table 2 and the evaluation of core recovery rate
| Embodiment | Water plugging rate (%) | Core recovery rate (%) |
| No. 1 traditional sealing agent | 85.5% | 87.2% |
| No. 2 traditional sealing agents | 90.2% | 91.7% |
| No. 3 traditional sealing agents | 92.8% | 93.3 |
As can be seen from Table 1, the water plugging rate > 95% of oil-soluble sealing agent prepared by the present invention, core recovery rate > 98%, and table 2
The maximum water plugging rate of middle tradition sealing agent is 92%, and highest core recovery rate is 93%, it can be seen that oil-soluble prepared by the present invention
The water plugging rate and core recovery rate of sealing agent are apparently higher than traditional sealing agent.
To sum up, oil-soluble sealing agent of the invention has drawn the advantages of water-soluble water shutoff agent and acid-soluble water shutoff agent, simultaneously
Avoid the disadvantage that water-soluble water shutoff agent is difficult to voluntarily de-plugging and acid-soluble water shutoff agent protects oil-gas Layer ineffective.It is stifled playing
It forces acid solution to enter tight formation while aqua plugging action, achievees the purpose that acid solution shunting, homogeneous acidification.Work as oil well
When operation, oil-soluble water shutoff agent can dissolve in crude oil again automatically, be discharged with crude oil, in-place permeability is restored, and improves oil
The production capacity of layer, and be safe from harm to environment and staff's body, meet oil well future water shutoff agent development trend.
It will be understood by those skilled in the art that the respective embodiments described above are to realize specific embodiments of the present invention,
And in practical applications, can to it, various changes can be made in the form and details, without departing from the spirit and scope of the present invention.
Claims (10)
1. a kind of oil-soluble sealing agent, which is characterized in that be made of the component of following mass percent:
C9Petropols 40%~50%；
Asphalt 20%~25%；
Rock asphalt 10%~15%；
Xanthan gum 5%~10%；
Nanofiber 4%~8%；
Surfactant 2%~6%.
2. oil-soluble sealing agent as described in claim 1, which is characterized in that the asphalt is No. 130 asphalt.
3. oil-soluble sealing agent as described in claim 1, which is characterized in that the nanofiber is houghite class nanometer
Material, the diameter of fiber are 70nm~100nm, and length is 10 μm.
4. oil-soluble sealing agent as described in claim 1, which is characterized in that the surfactant is aliphatic hydrocarbon base class
Surfactant selects any one of coco-nut oil fatty acid, stearic acid, higher aliphatic, lauryl sodium sulfate.
5. a kind of preparation method of the oil-soluble sealing agent as described in any claim in Claims 1 to 4, feature exist
In, comprising the following steps:
Asphalt, rock asphalt are added in kneader by step S1 by formula ratio, heating stirring to be uniformly mixed；
Step S2 continues that C is added into kneader9Petropols stop stirring when miscible stirring is to default viscosity, form mixing
Object A；
Step S3 takes mixture A, xanthan gum, surfactant, the nanofiber of formula ratio to be added to reaction kettle, constantly stirs
It mixes and the heating that heats up stops stirring, obtain mixture B after cooling when the system in reaction kettle is cross-linked to predeterminable level；
Step S4 handles mixture B, obtains oil-soluble sealing agent.
6. the preparation method of oil-soluble sealing agent as claimed in claim 5, which is characterized in that heating stirring described in step S1
Refer to that heating temperature is 130 DEG C~150 DEG C to being uniformly mixed, mixing speed is 3000r/min~3500r/min.
7. the preparation method of oil-soluble sealing agent as claimed in claim 5, which is characterized in that miscible stirring described in step S2
To default viscosity, the speed of mixing is maintained at 3500r/min~4000r/min, and presetting viscosity is 0.8PaS.
8. the preparation method of oil-soluble sealing agent as claimed in claim 5, which is characterized in that be stirred continuously described in step S3
And the heating that heats up stops stirring and refers to holding 3500r/min~4000r/ until the system in reaction kettle is cross-linked to predeterminable level
The mixing speed of min is warming up to 150 DEG C~170 DEG C, is cross-linked to that system becomes gel-type structure from colloidal sol rotation structure and viscosity reaches
Stop stirring when to 1.0PaS.
9. the preparation method of oil-soluble sealing agent as claimed in claim 5, which is characterized in that the mixing of processing described in step S4
There are two types of processing modes for object B tool, are the oil-soluble sealing agent for mixture B being put into mold, required shape being made respectively, and will
Mixture B after cooling and shaping squeezes out to obtain the oil-soluble sealing agent particle of required diameter through single screw extruder.
10. a kind of application method of oil-soluble sealing agent, which comprises the following steps:
Step 1 puts into the oil-soluble sealing agent of preparation in the reservoir being acidified to water blockoff；
Step 2, when drilling well liquid columnpressure is greater than strata pressure in well, oil-soluble sealing agent is preferentially squeezed into permeability and exists
The high permeability formation of 200mD or more, and under 65 DEG C~130 DEG C of formation temperature, oil-soluble sealing agent softens, deforms, and blocks up
Rock gap and throat are filled in, temporarily stifled band is formed, acid solution is forced to enter permeability in the tight formation of 1mD~50mD；
Step 3 brings in, and oil-soluble sealing agent dissolves in crude oil automatically, is discharged with crude oil.
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Effective date of registration: 20201028 Address after: 100007 Dongcheng District, Dongzhimen, China, North Street, No. 9 Oil Mansion, No. Applicant after: CHINA NATIONAL PETROLEUM Corp. Applicant after: CNPC CHUANQING DRILLING ENGINEERING Co.,Ltd. Address before: 710018 Shaanxi province Xi'an Weiyang Changqing Changqing prosperous Park District Building Room 1207 Applicant before: CNPC CHUANQING DRILLING ENGINEERING Co.,Ltd. |
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Application publication date: 20191115 |