CN108219760A - For the foam compound leakage stop agent and its application method of fractured reservoir - Google Patents
For the foam compound leakage stop agent and its application method of fractured reservoir Download PDFInfo
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- CN108219760A CN108219760A CN201611190189.0A CN201611190189A CN108219760A CN 108219760 A CN108219760 A CN 108219760A CN 201611190189 A CN201611190189 A CN 201611190189A CN 108219760 A CN108219760 A CN 108219760A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/42—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
- C09K8/46—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing inorganic binders, e.g. Portland cement
- C09K8/467—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing inorganic binders, e.g. Portland cement containing additives for specific purposes
- C09K8/473—Density reducing additives, e.g. for obtaining foamed cement compositions
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/08—Fiber-containing well treatment fluids
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/18—Bridging agents, i.e. particles for temporarily filling the pores of a formation; Graded salts
Abstract
The invention discloses a kind of foam compound leakage stop agents and its application method for fractured reservoir, belong to oil field development technical field.The foam compound leakage stop agent is foamed to obtain by sealing agent slurries, is counted using the gross mass of sealing agent slurries as 100%, and sealing agent slurries include the component of following mass percent：Oil-soluble cyanogen coagulates, and 82%~89%；Fiber-bridged agent, 0.2%~0.8%；Oil-well cement, 2%~6%；For being catalyzed the catalyst that oil-soluble cyanogen cohesion is closed, 0.02%~1%；Foaming agent, 0.2%~0.8%；Organic solvent, surplus.The foam compound leakage stop agent compression strength is high, volume expansion multiple is big, broad application temperature range, meets the needs of low pressure fracturing formation leak stopping, it can realize the bearing capacity for reaching higher under the premise of relatively low material consumption, improve leak stopping success rate, while reduce consumption and construction cost.
Description
Technical field
The present invention relates to oil field development technical field, more particularly to a kind of foam compound leakage stop agents for fractured reservoir
And its application method.
Background technology
Carbonate formation crack, corrosion hole sexual development, cause Formation bearing pressure low, are drilled in well operations, easily
It misses, influences normally to be drilled well operations；After putting into production as oil (gas) producing well, fracture hole, which buds into, links up side
Water, bottom aquaporin cause side, bottom water to invade pay interval along big seam, big hole, cause the too early water logging of oily (gas) well.State at present
It is inside and outside that more in-depth study is carried out for pressurization sealing, there is scholar to propose the general of " wellbore reinforcing " using " stress cage " model
It reads, it is believed that when head of liquid is more than the closure stress of crack tip, leakage will occur, and obstruct head of liquid to crack tip
Conduction be the key that pressurization sealing.
Based on the above, in order to block the tip in crack, the prior art generally selects " bridging material " i.e. as far as possible
Go deep into crack " building bridge ", play the role of good bridge plug, then coordinate plugging slurry and other expanding materials, filler
Fractures is waited to play good plugging effect.Common plugging material is divided into following three classes：(1) fibrous material mainly has jade
Plants, the chemical industry fibers such as rice stalk, cotton stalk, sepiolite and asbestos wool, fibrous material can be deep into inside crack and build bridge, together
When increase the viscosity of blocking agent and block its loss；(2) expansion filling material, including dilatancy resin, high-molecular gel etc., this
It can fully be expanded after the water suction of class material, good filler can be used as, have expansion rate of water absorption height, retentivity strong and protected
The characteristics of water rate is high can effectively meet the leak stopping demand of macropore, intrinsic fracture and solution cavity leakage；(3) quick dehydration material, packet
Include oil-well cement, milk of lime etc., this kind of " high dehydration material " can rapid leak-off, very thick filter cake is deposited in crack, is carried
High wellbore intensity.
In the implementation of the present invention, the inventors discovered that having at least the following problems in the prior art：It is existing stifled
Leak material exist easily precipitation miss, bearing capacity not high (bearing capacity is in below 7MPa) and filling filling dosage greatly, cost compared with
The problems such as high, is not suitable for low pressure fracturing formation leak stopping.
Invention content
In order to solve the technical issues of above-mentioned, the embodiment of the present invention, which provides one kind, can effectively occupy fracture hole space, by weight
Power, the influence of water body are small, and bearing capacity is high, Applicable temperature is wide, suitable for the compound leak stopping of foam of low pressure fracturing formation leak stopping
Agent and its application method.
Specifically, including following technical solution：
In a first aspect, the embodiment of the present invention provides a kind of foam compound leakage stop agent for fractured reservoir, by sealing agent
Slurries foam to obtain, and are counted using the gross mass of the sealing agent slurries as 100%, and the sealing agent slurries include following quality percentage
The component of ratio：
Oil-soluble cyanogen coagulates, and 82%~89%；
Fiber-bridged agent, 0.2%~0.8%；
Oil-well cement, 2%~6%；
For being catalyzed the catalyst that oil-soluble cyanogen cohesion is closed, 0.02%~1%；
Foaming agent, 0.2%~0.8%；
Organic solvent, surplus.
Specifically, the fiber-bridged agent is selected from polypropylene fibre and/or sepiolite fibre.
Specifically, the length of the polypropylene fibre is 3mm~9mm, and the sepiolite fibre length is 3mm~6mm.
Specifically, the catalyst is selected from benzene sulfonyl chloride or chlorobenzoyl chloride, and the mass percent of the catalyst is 0.1%
~1%.
Specifically, the catalyst is selected from triethylamine or dibutyl tin laurate, the mass percent of the catalyst
0.02%~0.10%.
Specifically, the foaming agent is selected from dodecyl polyoxyethylene sodium sulphate and/or cetyl benzenesulfonic acid sodium.
Specifically, the organic solvent is selected from dimethylbenzene and/or acetone.
Second aspect, the embodiment of the present invention provide a kind of application method of above-mentioned foam compound leakage stop agent, the use
Method includes：
Step a, to underground tripping in rubber plug and support tube column；
Step b prepares the sealing agent slurries；
The sealing agent slurries to underground tripping in operating tool string, are delivered to predetermined layer by step c by the operating tool string
Section；
Step d injects organic solvent into the operating tool string；
Step e, to the operating tool string injected clear water；
Step f, closing well Hou Ning preset times；Drifting is carried out later and visits sand face operation；Remove the foam in pit shaft
The induration of compound leakage stop agent, and carry out pressure testing.
Specifically, the step b includes：The catalyst, the organic solvent, the foaming are added in into reaction vessel
Agent and the oil-soluble cyanogen coagulate, and the fiber-bridged agent and institute are added after being stirred 30 minutes~50 minutes at 20 DEG C~40 DEG C
State oil-well cement, stirred at 10 DEG C~30 DEG C 20 minutes~obtain the sealing agent slurries after forty minutes.
Specifically, formation temperature is 20 DEG C~100 DEG C.
The advantageous effect of technical solution provided in an embodiment of the present invention：
In foam compound leakage stop agent provided in an embodiment of the present invention, oil base poly- ammonia of the selection containing isocyanate groups (- NCO)
Ester performed polymer (i.e. oil-soluble cyanogen coagulates) is as host agent, with the additive compounds such as fiber-bridged agent, oil-well cement, catalyst, foaming agent
Sealing agent slurries are obtained, after sealing agent slurries are injected stratum, oil-soluble cyanogen is coagulated to carry out under the action of catalyst, foaming agent etc.
Foaming forms foam compound leakage stop agent, to block crack.Foam compound leakage stop agent provided in an embodiment of the present invention is sent out under high pressure
Foam volume expansion multiple is up to 2~6 times；And sealing agent serum density reduces the weight caused by density contrast close to water
Power displacement leakage risk；The addition of oil-well cement makes the compression strength of foam compound leakage stop agent be realized relatively low up to 20~30MPa
Material consumption reach higher bearing capacity (>10MPa)；It is bonded using fiber-bridged agent in Reservoir Fracture, empty depths, and
It puts up a bridge with sealing agent, realizes the strong resident of sealing agent.Compared with existing sealing agent, foam provided in an embodiment of the present invention is compound stifled
Leakage agent can better conform to the demand of low pressure fracturing formation leak stopping, improve leak stopping success rate, reduce consumption and construction cost.
Specific embodiment
To make technical scheme of the present invention and advantage clearer, embodiment of the present invention is made below further detailed
Description.Unless otherwise defined, all technical terms used in the embodiment of the present invention are respectively provided with usually manages with those skilled in the art
The identical meaning of solution.
Low pressure fracturing formation causes severe mud losses to influence drilling and follow-up note since the bearing capacity of stratum in itself is poor
Well cementing of cement, it is therefore desirable to which the sealing agent that leak stopping is carried out to low pressure fracturing formation after consolidating there is higher bearing capacity (to block up
Bearing capacity after leakage agent consolidation should be able to reach more than 10MPa), and also require sealing agent that can effectively occupy fracture hole space,
Small, wider temperature-controllable section (generally 20~100 DEG C) is influenced by gravity, water body.
Based on the above, on the one hand the embodiment of the present invention is provided suitable for fractured reservoir, particularly low pressure crack
On the other hand the foam compound leakage stop agent on property stratum provides the application method of the foam compound leakage stop agent.
Specifically, the foam compound leakage stop agent provided in an embodiment of the present invention for fractured reservoir is by sealing agent slurries
Foaming obtains, and is counted using the gross mass of sealing agent slurries as 100%, and sealing agent slurries include the component of following mass percent：
Oil-soluble cyanogen coagulates, and 82%~89%；
Fiber-bridged agent, 0.2%~0.8%；
Oil-well cement, 2%~6%；
For be catalyzed oil-soluble cyanogen cohesion close catalyst, 0.02%~1%；
Foaming agent, 0.2%~0.8%；
Organic solvent, surplus.
In foam compound leakage stop agent provided in an embodiment of the present invention, oil-soluble cyanogen coagulate for one kind containing isocyanate groups (-
Polymerisation can further occur under the action of catalyst and foaming agent for oil base base polyurethane prepolymer for use as NCO), be formed
Foaming body.
Oil-well cement then as strengthening agent, improves the compression strength of foam compound leakage stop agent.
Fiber-bridged agent realizes that the strong of sealing agent is stayed then in Reservoir Fracture, empty depths bonding, and put up a bridge with sealing agent
It stays.
On the one hand the use of organic solvent makes each component in sealing agent slurries preferably disperse, on the other hand makes sealing agent
Serum density reduces the gravity displacement leakage risk caused by density contrast close to water.
Pass through the mutual cooperation between above-mentioned each component and synergistic effect so that foam provided in an embodiment of the present invention is answered
The compression strength of sealing agent is closed up to 20~30MPa, and foaming body volume expansion multiple is realized up to 2~6 times relatively low
Reach under the premise of material consumption higher bearing capacity (>10MPa), and Applicable temperature range is at 20 DEG C~100 DEG C, applicable for temperature
It is wide (specific performance index is as shown in table 1) to spend range.Therefore, foam compound leakage stop agent provided in an embodiment of the present invention can be fitted more preferably
The demand of low pressure fracturing formation leak stopping is answered, leak stopping success rate can be improved by carrying out plugging operations using above-mentioned sealing agent, simultaneously
Reduce consumption and construction cost.
1 foam compound leakage stop agent curing performance index provided in an embodiment of the present invention of table
Specifically, in the embodiment of the present invention, oil-soluble cyanogen coagulates (the oil base base polyurethane prepolymer for use as containing isocyanate groups) can
To select the product of the extremely big Hua Sheng chemical materials Co., Ltd in Tianjin.Oil-soluble cyanogen coagulates the mass percent for accounting for sealing agent slurries
Can be 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89% etc..
Fiber-bridged agent can be polypropylene fibre, sepiolite fibre etc., can be used alone fiber-bridged agent,
Can two kinds of fiber-bridged agent be used in compounding.For example, polypropylene fibre and sepiolite fibre are according to 1:1 ratio compounding.Wherein,
The length of polypropylene fibre can be 3mm~9mm, and sepiolite fibre length can be 3mm~6mm.Polypropylene fibre can select
With the product of Hebei Yi Bo Chemical Co., Ltd.s, sepiolite fibre can select the production of Lingshou Ji Xin petroleum assistants Co., Ltd
Product.Fiber-bridged agent account for sealing agent slurries mass percent can be 0.2%, 0.3%, 0.4%, 0.5%, 0.6%,
0.7%th, 0.8% etc.
Catalyst can select benzene sulfonyl chloride (C6H5—SO2) or chlorobenzoyl chloride (C Cl6H5- COCl), benzene sulfonyl chloride or benzene
Formyl chloride account for sealing agent slurries mass percent can be 0.1%~1%, such as 0.1%, 0.2%, 0.3%, 0.4%,
0.5%th, 0.6%, 0.7%, 0.8%, 0.9%, 1.0% etc..Benzene sulfonyl chloride and chlorobenzoyl chloride can select Zhenjiang favour Longhua work
The product of Co., Ltd.Catalyst can also select triethylamine (C6H15) or dibutyl tin laurate (C N32H64O4Sn), three second
Amine or dibutyl tin laurate account for the mass percent 0.02%~0.10% of sealing agent slurries, for example, 0.02%, 0.03%,
0.04%th, 0.05%, 0.06%, 0.07%, 0.08%, 0.09%, 0.10% etc..Triethylamine can select Tianjin recovery chemistry
The product of product Co., Ltd, dibutyl tin laurate can select the product of Shanghai De Yin Chemical Co., Ltd.s.
Foaming agent can select dodecyl polyoxyethylene sodium sulphate (AES, CH3(CH2)11-(OCH2CH2)3OSO3Na), ten
Six sodium alkyl benzene sulfonate (C18H29SO3Na) etc., can be used alone foaming agent, can also a variety of foaming agents be used in compounding.
The mass percent that foaming agent accounts for sealing agent can be 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8% etc..
Dodecyl polyoxyethylene sodium sulphate and cetyl benzenesulfonic acid sodium can select the product of petrochemical corporation (complex) of Fushun City.
Organic solvent can be dimethylbenzene (C6H4(CH3)2), acetone (C4H8O2) etc. with close organic molten of the density of water
Agent can be used alone organic solvent, can also a variety of organic solvents be used in compounding.
The application method of above-mentioned foam compound leakage stop agent provided in an embodiment of the present invention includes the following steps：
Step 1, to underground tripping in rubber plug and support tube column, to prevent from polluting non-construction interval.
Step 2, sealing agent slurries are prepared.
The process for preparation of sealing agent slurries is specific as follows：
Catalyst, organic solvent, foaming agent and oil-soluble cyanogen are added in into reaction vessel to coagulate, and are stirred at 20 DEG C~40 DEG C
Add fiber-bridged agent and oil-well cement after 30 minutes~50 minutes, stirred at 10 DEG C~30 DEG C 20 minutes~after forty minutes
Obtain sealing agent slurries.
Step 3, to underground tripping in operating tool string, sealing agent slurries are delivered to predetermined interval by operating tool string.
Operating tool string uses the conventional construction tubing string of this field, and the embodiment of the present invention is not particularly limited.Construction pipe
Column can specifically include oil pipe, the syringe for being connected to oil pipe lower end etc..
Step 4, organic solvent cleaning pipe line is injected into operating tool string, as protection liquid.Organic solvent can be with leak stopping
Organic solvent in agent slurries is identical.The organic solvent is pumped by pump truck, and it can be 0.1m to be pumped into volume3~0.4m3, such as
0.1m3、0.2m3、0.3m3、0.4m3Deng.
Step 5, to operating tool string injected clear water, sealing agent slurries is pushed to move down, finally sprays into stratum through syringe.Clear water
It is pumped into again by pump truck.The mass ratio of sealing agent slurries and clear water can be 1：(0.5~3), such as 1:0.5、1:1、1:
1.5、1:2、1:2.5、1:3 etc..
Step 6, closing well Hou Ning preset times (such as 48 hours)；It carries out drifting using former tubing string and visits sand face to make later
Industry；The induration of the foam compound leakage stop agent in pit shaft is removed again, and carries out pressure testing, can 0.2MPa be declined with 30min pressure
For qualification.
It will be appreciated by persons skilled in the art that in above-mentioned application method, the sequence of step 1 and step 2 is not stringent
It limits.
In above-mentioned application method, formation temperature can be 20 DEG C~100 DEG C, such as 20 DEG C, 30 DEG C, 40 DEG C, 50 DEG C, 60
DEG C, 70 DEG C, 80 DEG C, 90 DEG C, 100 DEG C etc..
The technical solution of the embodiment of the present invention is described in further detail below by specific experimental data.
In following embodiment, reagent used is specific as follows：
Oil-soluble cyanogen coagulates, industrial goods, purchased from the extremely big Hua Sheng chemical materials Co., Ltd in Tianjin；
Polypropylene fibre, 3~9mm of specification, purchased from Hebei Yi Bo Chemical Co., Ltd.s；
Oil-well cement praises G grades of oil-well cements of China, purchased from Sichuan Jia Hua limited companies；
Benzene sulfonyl chloride, chemistry is pure, purchased from Zhenjiang Hui Long Chemical Co., Ltd.s；
Chlorobenzoyl chloride, chemistry is pure, purchased from Zhenjiang Hui Long Chemical Co., Ltd.s
Triethylamine, chemistry is pure, recovers Chemical Company purchased from Tianjin；
Dodecyl polyoxyethylene sodium sulphate, chemistry is pure, purchased from petrochemical corporation (complex) of Fushun City；
Cetyl benzenesulfonic acid sodium, chemistry is pure, purchased from petrochemical corporation (complex) of Fushun City；
Dimethylbenzene, chemistry is pure, purchased from Yangzhou Tuo Bang Chemical Co., Ltd.s.
Experimental method used in following embodiment is conventional method unless otherwise specified.
Embodiment 1
The present embodiment provides a kind of foam compound leakage stop agent for fractured reservoir, and pass through laboratory test to this implementation
The performance of the foam compound leakage stop agent of example is measured.
Foam compound leakage stop agent provided in this embodiment is foamed to obtain by following sealing agent slurries, with the total of sealing agent slurries
Quality is 100% meter, and sealing agent slurries include the component of following mass percent：
In the present embodiment, sealing agent slurries are prepared using following methods：
According to above-mentioned formula, benzene sulfonyl chloride, dimethylbenzene, dodecyl polyoxy are added in first into 2000L enamel reaction stills
Oxyethylene sulfate and oil-soluble cyanogen coagulate, and heating temperature of reaction kettle stirs after forty minutes to 30 DEG C at 30 DEG C, continues up
It states reaction kettle and adds in polypropylene fibre and oil-well cement, reduce temperature of reaction kettle to 20 DEG C, obtained after stirring 30min at 20 DEG C
Sealing agent slurries.
Laboratory test shows that the viscosity of the sealing agent slurries of foam compound leakage stop agent provided in this embodiment is 0.4Pa
S, with water with mass ratio 1:After 1 ratio mixing, the presetting period at 60 DEG C is 2.5h, hardening time 10h, after curing
To the compression strength of foams reach 21MPa, 10MPa high pressure volumetric expansion to 4 times of initial volume, elasticity modulus
More than 2.0 × 10-4kg·cm-2。
Embodiment 2
The present embodiment provides a kind of foam compound leakage stop agent for fractured reservoir, and pass through laboratory test to this implementation
The performance of the foam compound leakage stop agent of example is measured.
Foam compound leakage stop agent provided in this embodiment is foamed to obtain by following sealing agent slurries, with the total of sealing agent slurries
Quality is 100% meter, and sealing agent slurries include the component of following mass percent：
In the present embodiment, the preparation method is the same as that of Example 1 for sealing agent slurries.
Laboratory test shows that the viscosity of the sealing agent slurries of foam compound leakage stop agent provided in this embodiment is 0.3Pa
S, with water with mass ratio 1:After 1 ratio mixing, the presetting period at 25 DEG C is 5h, and hardening time 14h is obtained after curing
The compression strength of foams reach 22MPa, 10MPa high pressure volumetric expansion to 2 times of initial volume, elasticity modulus is big
In 2.0 × 10-4kg·cm-2。
Embodiment 3
The present embodiment provides a kind of foam compound leakage stop agent for fractured reservoir, and pass through laboratory test to this implementation
The performance of the foam compound leakage stop agent of example is measured.
Foam compound leakage stop agent provided in this embodiment is foamed to obtain by following sealing agent slurries, with the total of sealing agent slurries
Quality is 100% meter, and sealing agent slurries include the component of following mass percent：
In the present embodiment, the preparation method is the same as that of Example 1 for sealing agent slurries.
Laboratory test shows that the viscosity of the sealing agent slurries of foam compound leakage stop agent provided in this embodiment is 0.4Pa
S, with water with mass ratio 1:After 1 ratio mixing, the presetting period at 80 DEG C is 2h, hardening time 6.5h, after curing
To the compression strength of foams reach 20MPa, 10MPa high pressure volumetric expansion to 5 times of initial volume, elasticity modulus
More than 2.0 × 10-4kg·cm-2。
Embodiment 4
The present embodiment provides a kind of foam compound leakage stop agent for fractured reservoir, and pass through laboratory test to this implementation
The performance of the foam compound leakage stop agent of example is measured.
Foam compound leakage stop agent provided in this embodiment is foamed to obtain by following sealing agent slurries, with the total of sealing agent slurries
Quality is 100% meter, and sealing agent slurries include the component of following mass percent：
In the present embodiment, the preparation method is the same as that of Example 1 for sealing agent slurries.
Laboratory test shows that the viscosity of the sealing agent slurries of foam compound leakage stop agent provided in this embodiment is 0.3Pa
S, with water with mass ratio 1:After 1 ratio mixing, the presetting period at 40 DEG C is 4h, hardening time 13h, after curing
To the compression strength of foams reach 23MPa, 10MPa high pressure volumetric expansion to 3 times of initial volume, elasticity modulus
More than 2.0 × 10-4kg·cm-2。
To sum up, it in the embodiment of the present invention, is optimized by the type to each component in sealing agent slurries and proportioning,
Obtain that a kind of compression strength is high, volume expansion multiple is big, broad application temperature range foam compound leakage stop agent.The foam is compound
Sealing agent can better conform to the demand of low pressure fracturing formation leak stopping, can realize and reach under the premise of relatively low material consumption
Higher bearing capacity improves leak stopping success rate, while reduces consumption and construction cost.
The above is for only for ease of it will be understood by those skilled in the art that technical scheme of the present invention, not limiting
The present invention.All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in this
Within the protection domain of invention.
Claims (10)
1. a kind of foam compound leakage stop agent for fractured reservoir is foamed to obtain, which is characterized in that with institute by sealing agent slurries
The gross mass for stating sealing agent slurries is 100% meter, and the sealing agent slurries include the component of following mass percent：
Oil-soluble cyanogen coagulates, and 82%~89%；
Fiber-bridged agent, 0.2%~0.8%；
Oil-well cement, 2%~6%；
For being catalyzed the catalyst that oil-soluble cyanogen cohesion is closed, 0.02%~1%；
Foaming agent, 0.2%~0.8%；
Organic solvent, surplus.
2. foam compound leakage stop agent according to claim 1, which is characterized in that it is fine that the fiber-bridged agent is selected from polypropylene
Dimension and/or sepiolite fibre.
3. foam compound leakage stop agent according to claim 2, which is characterized in that the length of the polypropylene fibre is 3mm
~9mm, the sepiolite fibre length are 3mm~6mm.
4. foam compound leakage stop agent according to claim 1, which is characterized in that the catalyst is selected from benzene sulfonyl chloride or benzene
Formyl chloride, the mass percent of the catalyst is 0.1%~1%.
5. foam compound leakage stop agent according to claim 1, which is characterized in that the catalyst is selected from triethylamine or February
Dilaurylate, the mass percent 0.02%~0.10% of the catalyst.
6. foam compound leakage stop agent according to claim 1, which is characterized in that the foaming agent is selected from dodecyl polyoxy
Oxyethylene sulfate and/or cetyl benzenesulfonic acid sodium.
7. foam compound leakage stop agent according to claim 1, which is characterized in that the organic solvent be selected from dimethylbenzene and/
Or acetone.
8. a kind of application method of claim 1~7 any one of them foam compound leakage stop agent, which is characterized in that including：
Step a, to underground tripping in rubber plug and support tube column；
Step b prepares the sealing agent slurries；
The sealing agent slurries to underground tripping in operating tool string, are delivered to predetermined interval by step c by the operating tool string；
Step d injects organic solvent into the operating tool string；
Step e, to the operating tool string injected clear water；
Step f, closing well Hou Ning preset times；Drifting is carried out later and visits sand face operation；The foam removed in pit shaft is compound
The induration of sealing agent, and carry out pressure testing.
9. application method according to claim 8, which is characterized in that the step b is specifically included：Add into reaction vessel
Enter the catalyst, the organic solvent, the foaming agent and the oil-soluble cyanogen to coagulate, be stirred 30 minutes at 20 DEG C~40 DEG C
The fiber-bridged agent and the oil-well cement are added after~50 minutes, is stirred 20 minutes~40 minutes at 10 DEG C~30 DEG C
After obtain the sealing agent slurries.
10. application method according to claim 8, which is characterized in that formation temperature is 20 DEG C~100 DEG C.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110396279A (en) * | 2019-07-31 | 2019-11-01 | 北京艾施姆科技有限公司 | A kind of TIT build-in sealing is with aqueous from respiratory consolidation material and preparation method thereof |
| CN113980663A (en) * | 2021-11-10 | 2022-01-28 | 四川大学 | High-temperature-resistant self-foaming expansion silicone rubber plugging material and preparation method thereof |
| CN115991979A (en) * | 2021-10-20 | 2023-04-21 | 中国石油化工股份有限公司 | Oil-based foam gel plugging agent for fractured shale, and preparation method and application thereof |
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| CN110396279B (en) * | 2019-07-31 | 2022-04-29 | 北京中科安途交通科技有限公司 | Water-based self-breathing consolidation material for pavement sealing layer and preparation method thereof |
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| CN115991979B (en) * | 2021-10-20 | 2023-12-22 | 中国石油化工股份有限公司 | Oil-based foam gel plugging agent for fractured shale, and preparation method and application thereof |
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