CN110330959A - Liquid gum plug diverting agent and preparation method thereof - Google Patents
Liquid gum plug diverting agent and preparation method thereof Download PDFInfo
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- CN110330959A CN110330959A CN201910710591.4A CN201910710591A CN110330959A CN 110330959 A CN110330959 A CN 110330959A CN 201910710591 A CN201910710591 A CN 201910710591A CN 110330959 A CN110330959 A CN 110330959A
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- liquid gum
- gum plug
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F120/00—Homopolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride, ester, amide, imide or nitrile thereof
- C08F120/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F120/10—Esters
- C08F120/38—Esters containing sulfur
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/52—Amides or imides
- C08F220/54—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide
- C08F220/56—Acrylamide; Methacrylamide
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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
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/504—Compositions based on water or polar solvents
- C09K8/506—Compositions based on water or polar solvents containing organic compounds
- C09K8/508—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/5083—Compositions based on water or polar solvents containing organic compounds macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
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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
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/504—Compositions based on water or polar solvents
- C09K8/506—Compositions based on water or polar solvents containing organic compounds
- C09K8/508—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/512—Compositions based on water or polar solvents containing organic compounds macromolecular compounds containing cross-linking agents
Abstract
This application involves oil gas chemical fields, in particular to a kind of liquid gum plug diverting agent and preparation method thereof.The raw material of liquid gum plug diverting agent mainly includes the following components based on hundred number of quality: monomer 10~25%, crosslinking agent 0.05~0.5%, initiator 0.1~0.5%, inorganic aggregates 1~5% and additive 0.01~0.1%；Wherein, additive includes at least one of ethylenediamine tetra-acetic acid, disodium ethylene diamine tetraacetate, thiocarbamide or sodium citrate.At least one of ethylenediamine tetra-acetic acid, disodium ethylene diamine tetraacetate, thiocarbamide or sodium citrate cooperate with monomer, crosslinking agent, initiator and inorganic aggregates, and liquid gum plug diverting agent is made to have plastic fast, and intensity is high.The energy Rapid gelation body under relatively low reservoir temperature, and gelling performance is stablized.
Description
Technical field
This application involves oil gas chemical fields, in particular to a kind of liquid gum plug diverting agent and preparation method thereof.
Background technique
For low pressure or crack, the complete well on solution cavity development leakiness stratum and well workover, the leakage of pit shaft working solution is often faced
Serious problem.Be directed to both at home and abroad at present well and workover leakage protective leak stopping using it is more be cross-linked polymer gel system, height
The lower plastic of temperature is fast, easily reaches high-intensitive；But under the conditions of middle low-temperature reservoir (such as 80-110 DEG C), exist leak into stratum can not
The risk of gelling.
Summary of the invention
The embodiment of the present application is designed to provide a kind of liquid gum plug diverting agent and preparation method thereof, is intended to improve existing
The problem of some liquid gum plug diverting agents gel-forming property deficiency under middle cryogenic conditions.
The application first aspect provides a kind of liquid gum plug diverting agent, and the raw material of liquid gum plug diverting agent mainly includes by matter
Measure the following components of hundred number meters:
Monomer 10~25%, crosslinking agent 0.05~0.5%, initiator 0.1~0.5% and add inorganic aggregates 1~5%
Add agent 0.01~0.1%.
Wherein, additive include in ethylenediamine tetra-acetic acid, disodium ethylene diamine tetraacetate, thiocarbamide or sodium citrate at least
It is a kind of.
The raw material of liquid gum plug diverting agent includes monomer, crosslinking agent, initiator, inorganic aggregates and additive；It is above-mentioned to add
Add agent can increase monomer, crosslinking agent, initiator for reaction rate, make raw material under relatively lower temp (such as 80-110 DEG C)
Quick cross-linking, inorganic aggregates can increase the intensity of gel, and gel is made to have preferable pressure-bearing property.
In some embodiments of the application first aspect, above-mentioned raw materials mainly include based on hundred number of quality with the following group
Point:
Monomer 15~20%, crosslinking agent 0.1~0.3%, initiator 0.2~0.3%, inorganic aggregates 2~4% and addition
Agent 0.05~0.08%.
Under the proportion, the pumping of liquid gum plug diverting agent is good, has preferable load performance and lost circulation prevention performance.
In some embodiments of the application first aspect, above-mentioned monomer includes acrylamide or 2- acrylamide -2-
Any one of methyl propane sulfonic acid.
The monomers such as acrylamide or 2- acrylamide-2-methyl propane sulfonic can generate high viscosity with initiator polymerization reaction
Acrylamide copolymer；In the course of the polymerization process, it can guarantee preferable mobility and pumping.
In some embodiments of the application first aspect, above-mentioned crosslinking agent includes chromic acetate, hexa, N,
Any one of N '-methylene-bisacrylamide, resorcinol, catechol or phenolic aldehyde.
Chromic acetate, hexa, N, in N '-methylene-bisacrylamide, resorcinol, catechol or phenolic aldehyde
It is any, the generation of cross-linking reaction can be promoted in intermolecular bridging action.
In some embodiments of the application first aspect, above-mentioned initiator includes ammonium persulfate, azodiisobutyronitrile, mistake
Any one of potassium sulfate or sodium hydrogensulfite.
Above-mentioned additive and initiator synergistic effect can be in condition Rapid gelations under relatively lower temp, and gel is strong
Degree is preferable.
In some embodiments of the application first aspect, above-mentioned inorganic aggregates includes nano silica, bentonite, illiteracy
Any one of de- soil, graphite powder or mica powder.
Above-mentioned inorganic aggregates can increase gel strength；Support frame is provided for netted rubber plug.
The application second aspect provides a kind of preparation method of above-mentioned liquid gum plug diverting agent, specifically includes that
The raw material of mixing liquid rubber plug diverting agent.
Direct mixed raw material, can prepare liquid gum plug diverting agent within the faster time, and preparation process is simple to operation.
In some embodiments of the application second aspect, the step of raw material of above-mentioned mixing liquid rubber plug diverting agent, is wrapped
It includes:
Mix monomer, inorganic aggregates and water mix again with initiator, crosslinking agent, additive after homogeneous.
First mix monomer, inorganic aggregates and water, then mixed with initiator, crosslinking agent, additive, what cross-linking reaction obtained
System more evenly, is avoided as much as because heterogeneity causes partial gel to react too fast or excessively slow problem.
The application third aspect provides a kind of liquid gum plug diverting agent, and the raw material of liquid gum plug diverting agent mainly includes by matter
Measure the following components of hundred number meters:
16~18% acrylamide, 0.05~0.07% N,N methylene bis acrylamide, 0.2~0.4% mistake
Ammonium sulfate, 4~5% nano silica and 0.02~0.03% thiocarbamide.
There is aforesaid liquid rubber plug diverting agent preferable pump to infuse performance.With good shear stability energy.And tool
Have the advantages that pressure-bearing is high, leakage is small.
Temporary block up of the liquid gum plug diverting agent that the application first aspect provides for low pressure or leakage channel development reservoir is answered
With.
Plastic is fast under middle cryogenic conditions, in the short time, intensity is high for aforesaid liquid rubber plug diverting agent, and construction risk is low；Energy
Working solution leakage is enough reduced, low pressure or leakage channel development reservoir can temporarily be blocked up.
Detailed description of the invention
Technical solution in ord to more clearly illustrate embodiments of the present application, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only some embodiments of the application, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is shear viscosity-shear rate curve of different liquids rubber plug diverting agent in test example 2.
Specific embodiment
It, below will be in the embodiment of the present application to keep the purposes, technical schemes and advantages of the embodiment of the present application clearer
Technical solution be clearly and completely described.The person that is not specified actual conditions in embodiment, according to normal conditions or manufacturer builds
The condition of view carries out.Reagents or instruments used without specified manufacturer is the conventional production that can be obtained by commercially available purchase
Product.
In current research, the ingredient of liquid gum plug diverting agent is different, also respectively has advantage and disadvantage certainly: for example,
Raw material includes acrylamide, acrylic acid, 2- acrylamido -2- methyl propane sulfonic acid, cationic monomer acrylyl oxy-ethyl front three
Ammonium chloride, undecenoic acid, carboxymethyl cellulose and potassium chromium sulfate diverting agent, when preparation need to be passed through after nitrogen half an hour again
Initiator is added；Shut-off capacity is 10MPa.
For example, raw material includes the polymerization of 3wt% polyvinyl alcohol, 2wt% borax, 1wt% natural plant gum and the thin sawdust of 1wt%
Object GEL USED FOR PLUGGING WELL LOST CIRCULATION, gelation time 1-3 hours, bearing capacity was only above 3MPa.
For example, raw material includes the gel of polyacrylamide, phenolic resin, methylolated lignin sodium sulfonate and NaOH, it is resistance to
Warm 70-110 DEG C, gelation time is 1 day.
But the gelling temperature of above-mentioned liquid gum plug diverting agent is higher or the longer problem of gelation time, Bu Nengjian
It cares for.
The liquid gum plug diverting agent of the embodiment of the present application, preparation method and application are specifically described below.
The application first aspect provides a kind of liquid gum plug diverting agent, and the raw material of liquid gum plug diverting agent mainly includes by matter
Measure the following components of hundred number meters:
Monomer 10~25%, crosslinking agent 0.05~0.5%, initiator 0.1~0.5% and add inorganic aggregates 1~5%
Add agent 0.01~0.1%；
Wherein, additive include in ethylenediamine tetra-acetic acid, disodium ethylene diamine tetraacetate, thiocarbamide or sodium citrate at least
It is a kind of.
In this application, it selects in ethylenediamine tetra-acetic acid, disodium ethylene diamine tetraacetate, thiocarbamide or sodium citrate at least
It is a kind of as additive be added raw material in, with monomer, crosslinking agent, initiator and inorganic aggregates cooperate,
The raw material of liquid gum plug diverting agent includes monomer, crosslinking agent, initiator, inorganic aggregates and additive.Additive
Including at least one of ethylenediamine tetra-acetic acid, disodium ethylene diamine tetraacetate, thiocarbamide or sodium citrate.Additive and monomer,
Crosslinking agent, initiator are used cooperatively, and can be accelerated the time of cross-linking reaction, while can reduce temperature required for crosslinking；Make
Liquid gum plug diverting agent energy Rapid gelation body, nothing under relatively lower temp (such as 70-120 DEG C, further 80-110 DEG C)
Machine aggregate can increase the stability of system after crosslinking,.Such as 30min i.e. up to range estimation code H, stable period is big at 95 DEG C
In 12 days.
In this application, have the liquid gum plug diverting agent of monomer, crosslinking agent, initiator etc. can be in low temperature using raw material
Polymerization generates polymer under (such as 70-120 DEG C) fast speed, and the apparent viscosity of initial soln is only in the course of the polymerization process
2.24mPas or so, have good mobile performance and anti-shear performance, convenient for pumping while also ensure underground at
Colloidality energy.
Initial soln refer to liquid gum plug diverting agent by raw material mix after not complete plastic the case where.
Further, monomer includes any one of acrylamide or 2- acrylamide-2-methyl propane sulfonic.
The monomers such as acrylamide or 2- acrylamide-2-methyl propane sulfonic can generate high viscosity with initiator polymerization reaction
Polymer propylene amide monomer；In the course of the polymerization process, it can guarantee preferable mobility and pumping.
Further, in embodiments herein, crosslinking agent includes chromic acetate, hexa, N, N '-methylene
Any one of bisacrylamide, resorcinol, catechol or phenolic aldehyde.For example, crosslinking agent is N, N '-methylene bisacrylamide
Amide.
The main function of crosslinking agent is to promote the generation of cross-linking reaction in intermolecular bridging action.Hexa
Or N, N '-methylene-bisacrylamide make initial soln form the elastomer of fine and close tridimensional network, increase elastic characteristic.
Chromic acetate can make initial soln be cross-linked to form mobility gel rapidly, guarantee its pumping.Free water can effectively be fettered.Isophthalic
Diphenol, catechol or phenolic aldehyde can be crosslinked quickly in underground.
In the other embodiments of the application, crosslinking agent can also be selected from polyethyleneimine, aluminium citrate, organic zirconium etc..
Further, in embodiments herein, initiator includes ammonium persulfate, azodiisobutyronitrile, potassium peroxydisulfate
Or any one of sodium hydrogensulfite.
The main function of initiator is to cause the cross-linking reaction of monomer and crosslinking agent.In the other embodiments of the application
In, initiator may be other initiators.Further, above-mentioned additive and initiator synergistic effect can be in cryogenic conditions
(such as 70-120 DEG C) Rapid gelation, and gel strength is preferable.
Further, in embodiments herein, inorganic aggregates includes nano silica, bentonite, montmorillonite, stone
Any one of ink powder or mica powder.Inorganic aggregates can increase gel strength；Support frame is provided for netted rubber plug.At this
In the other embodiments of application, inorganic aggregates can be selected from silicon ash, sepiolite powder etc..Further, in the present embodiment, nothing
Machine aggregate uses silica.
Nano silica has the characteristics that size is small, large specific surface area.Since initial soln viscosity itself is extremely low, when adding
When entering the nano silica or bentonite of phase homogenous quantities, bentonite is more easily settled, uniformly dispersed not as good as receiving in system
Rice silica is good.
In some embodiments of the present application, the raw material of liquid gum plug diverting agent mainly include based on hundred number of quality with
Lower component: monomer 15~20%, crosslinking agent 0.1~0.3%, initiator 0.2~0.3%, inorganic aggregates 2~4% and addition
Agent 0.05~0.08%.
Further, raw material mainly includes the following components based on hundred number of quality: monomer 18%, and crosslinking agent 0.2% draws
Send out agent 0.2%, inorganic aggregates 3% and additive 0.06%.
Under the proportion, the pumping of liquid gum plug diverting agent is good, has preferable load performance and lost circulation prevention performance.
The application also provides a kind of preparation method of aforesaid liquid rubber plug diverting agent, specifically includes that
The raw material of mixing liquid rubber plug diverting agent.
The preparation method of liquid gum plug diverting agent is fairly simple, and operation is easier to.
Further, in order to make cross-linking reaction more evenly, the gel strength of whole system is as consistent as possible, the application's
In some embodiments, first mix monomer, inorganic aggregates and water, then mixed with initiator, crosslinking agent, additive, cross-linking reaction
Obtained system more evenly, is avoided as much as because heterogeneity causes partial gel to react too fast or excessively slow problem.
The application also provides a kind of liquid gum plug diverting agent, and the raw material of liquid gum plug diverting agent mainly includes by hundred parts of quality
The following components of number meter:
16~18% acrylamide, 0.05~0.07% N,N methylene bis acrylamide, 0.2~0.4% mistake
Ammonium sulfate, 4~5% nano silica and 0.02~0.03% thiocarbamide.The initial soln of the liquid gum plug diverting agent
Initial viscosity be only 1.4~2.2mPas, show that there is preferable pump to infuse performance for it.With good shear stability
Energy.And have the advantages that pressure-bearing is high, leakage is small.Such as: fracture width is the rock core of 0.170cm~0.398cm, and system is held
Pressure up to 13~20.5MPa, leak-off situation be under 25MPa filter loss be 2.5ml-7.5ml/5min,
This aforesaid liquid rubber plug diverting agent can be applied to carbonate reservoir.
Further, liquid gum plug diverting agent is prepared on well, is then pumped to underground.
Carbonate reservoir is due to its unique performance, and the leakage of well killing fluid is more serious during well workover.Aforesaid liquid
Plastic is fast under the conditions of middle low temperature (such as 70-120 DEG C), in very short time, intensity is high for rubber plug diverting agent；Leakage can be reduced.
In this application, gel strength (Gel of the gel strength determination method according to Sydansk et al. (1988)
Strength Codes abbreviation GSC) range estimation code table, it is shown in Table 1.The judgement side of all gel strength grades in this application
Method all data according to provided in table 1.
1 gel strength of table estimates code standard
The feature of the application and performance are described in further detail with reference to embodiments.
Embodiment 1
Present embodiments provide a kind of liquid gum plug diverting agent；Liquid gum plug diverting agent includes according to mass percentage
Following components:
18% acrylamide, 0.05%N, N '-methylene-bisacrylamide, 0.2% ammonium persulfate, 4% nanometer titanium dioxide
Silicon, 0.02% thiocarbamide, inevitable impurity and surplus water, system total volume is 100ml.
Embodiment 2
Present embodiments provide a kind of liquid gum plug diverting agent；Liquid gum plug diverting agent includes according to mass percentage
Following components:
18% acrylamide, 0.05% crosslinking agent 1,0.2% initiator ammonium persulfate, 1% nano silica, 0.02%
The water of thiocarbamide, inevitable impurity and surplus, system total volume are 100ml.
Embodiment 3
Present embodiments provide a kind of liquid gum plug diverting agent；Liquid gum plug diverting agent provided in this embodiment and embodiment
The difference of the 2 liquid gum plug diverting agents provided is: the mass percent of nano silica is 2% in the present embodiment.
Embodiment 4
Present embodiments provide a kind of liquid gum plug diverting agent；Liquid gum plug diverting agent provided in this embodiment and embodiment
The difference of the 2 liquid gum plug diverting agents provided is: the mass percent of nano silica is 3% in the present embodiment.
Embodiment 5
Present embodiments provide a kind of liquid gum plug diverting agent；Liquid gum plug diverting agent provided in this embodiment and embodiment
The difference of the 2 liquid gum plug diverting agents provided is: the mass percent of nano silica is 4% in the present embodiment.
Embodiment 6
Present embodiments provide a kind of liquid gum plug diverting agent；Liquid gum plug diverting agent provided in this embodiment and embodiment
The difference of the 2 liquid gum plug diverting agents provided is: the mass percent of nano silica is 5% in the present embodiment.
Embodiment 7
Present embodiments provide a kind of liquid gum plug diverting agent；Liquid gum plug diverting agent includes according to mass percentage
Following components:
18% acrylamide, 2% nano silica, 0.2% ammonium persulfate, 0.05% N, N '-methylene
Bisacrylamide, the 0.02% inevitable impurity of thiocarbamide and the water of surplus.
It is prepared using following method: first stirring evenly acrylamide is soluble in water, nanometer titanium dioxide is then added
Silicon, which is sufficiently stirred, forms homogeneous solution to it, and ammonium persulfate, N, N '-methylene-bisacrylamide and thiocarbamide, stirring 10 is added
Minute obtains liquid gum plug diverting agent.
Embodiment 8
Present embodiments provide a kind of liquid gum plug diverting agent；Liquid gum plug diverting agent includes according to mass percentage
Following components:
10% sulfonic acid acrylamide, 0.5% hexa, 0.5% azodiisobutyronitrile, 1% bentonite,
The water of 0.1% ethylenediamine tetra-acetic acid, inevitable impurity and surplus.
Embodiment 9
Present embodiments provide a kind of liquid gum plug diverting agent；Liquid gum plug diverting agent includes according to mass percentage
Following components:
10% acrylamide, 0.1% chromic acetate, 0.1% hexa, 0.1% N, N '-di-2-ethylhexylphosphine oxide
Acrylamide, 0.1% azodiisobutyronitrile, 5% bentonite, 0.06% ethylenediamine tetra-acetic acid, inevitable impurity with
And the water of surplus.
Test example 1
Detect the basic performance for the liquid gum plug diverting agent that embodiment 1 provides.
The liquid gum plug diverting agent gelation time and gelling strength provide embodiment 1 detects, testing result such as table 2
With shown in table 3.
Liquid gum plug diverting agent gelation time and gelling strength under 2 different temperatures of table
The stress of 3 different temperatures system of table (under 50% strain)
From table 2 and table 3 it is found that system can reach G or more intensity in 30min when temperature is 75-105 DEG C.?
When temperature is 75-105 DEG C, under 50% strain, 13 KPa are greater than to the stress for the liquid gum plug diverting agent that embodiment 1 provides.
Test example 2
Detect the mobile performance and shear stability energy to the embodiment 2-6 liquid gum plug diverting agent provided.
A kind of control diverting agent is configured, the difference for the liquid gum plug diverting agent that control diverting agent is provided with embodiment 2 is:
The content for compareing nano silica in diverting agent is zero.
The mobile performance and shear stability for the liquid gum plug diverting agent that detection control diverting agent, embodiment 2-6 are provided
Can, testing result is as shown in Fig. 1 and table 4.
Initial viscosity (0.01~600s of 4 different liquids rubber plug diverting agent of table-1)
From Fig. 1 and table 4 it can be seen that embodiment 2-6 provide liquid gum plug diverting agent solution initial soln it is initial
Viscosity is only 1.55~2.24mPas, shows that there is preferable pump to infuse performance for it.When shear rate is 100~600s-1,
With the increase of shear rate, the shear viscosity for the liquid gum plug diverting agent that embodiment 2-6 is provided is held nearly constant, and shows reality
Applying the liquid gum plug diverting agent solution that a 2-6 is provided has good shear stability energy.The anti-shear performance of embodiment 2-6
Better than control diverting agent；Illustrate, the shear stability energy that can be improved liquid gum plug diverting agent of nano silica.
Test example 3
It chooses the rock core that crack slit width is 0.170-0.398mm to be tested, laboratory independent development has different experiments
The core flooding test device of core parameters；The liquid gum plug diverting agent performance that testing example 7 provides.
The design of diverting agent dosage: determine that diverting agent dosage is 1300ml according to experimental provision volume.
Pressure-bearing leakproof experimental procedure:
(1) experimental provision is connected, detects leakproofness with clear water；
(2) experiment rock core is packed into core holding unit, and adds certain confining pressure；(3) liquid that testing example 7 is provided
Rubber plug diverting agent pours into autoclave body, opens heater switch, core holding unit and autoclave body is warming up to 95 DEG C of experimental temperature, to system
Abundant plastic；
(4) after the abundant plastic of system, proper amount of clear water is added into autoclave body, submerged composite fluid rubber plug body system, simulation ground
Diverting agent local environment in layer；
(5) by constant speed and constant pressure pump to autoclave body provide it is hydraulic, pressurize 0.5MPa every time, then keep pressure 5min, observation
There is pressure when liquid gum plug starts leak-off and are denoted as breakthrough pressure in the leakage and pressure drop situation in core holding unit exit.
The core parameters of different core flooding test devices are as shown in table 5- table 8；Detection architecture pressure-bearing and wastage.
The experiment core parameters of 5 No.1 core flooding test device of table
| Core numbers | Length, cm | Diameter, cm | Slit width, cm |
| One | 5.005 | 2.503 | 0.170 |
Pressure-bearing leakproof experimental result: the rock core for being 0.170cm to slit width, system pressure-bearing are 20.5MPa, and leak-off situation is
Wastage is 2.5ml/5min under 25MPa.
The experiment core parameters of 6 No. two core flooding test devices of table
| Core numbers | Length, cm | Diameter, cm | Slit width, cm |
| Two | 5.011 | 2.507 | 0.205 |
Pressure-bearing leakproof experimental result:
The rock core for being 0.205cm to slit width, system pressure-bearing are 18.5MPa, and leak-off situation is that wastage is 4ml/ under 25MPa
5min。
The experiment core parameters of 7 No. three core flooding test devices of table
| Core numbers | Length, cm | Diameter, cm | Slit width, cm |
| Three | 4.982 | 2.487 | 0.292 |
Pressure-bearing leakproof experimental result: the rock core for being 0.292cm to slit width, system pressure-bearing are 18.5MPa, and leak-off situation is
Wastage is 4.5ml/5min under 25MPa.
The experiment core parameters of 8 No. four core flooding test devices of table
| Core numbers | Length, cm | Diameter, cm | Slit width, cm |
| Four | 4.986 | 2.571 | 0.398 |
Pressure-bearing leakproof experimental result: the rock core for being 0.398cm to slit width, system pressure-bearing are 13MPa, and leak-off situation is
Wastage is 7.5ml/5min under 25MPa.
According to the above results；The system pressure-bearing for the liquid gum plug diverting agent that embodiment 7 provides is preferable, and wastage is lower
(2.5ml/5min-7.5ml/5min)。
The foregoing is merely preferred embodiment of the present application, are not intended to limit this application, for the skill of this field
For art personnel, various changes and changes are possible in this application.Within the spirit and principles of this application, made any to repair
Change, equivalent replacement, improvement etc., should be included within the scope of protection of this application.
Claims (9)
1. a kind of liquid gum plug diverting agent, which is characterized in that the raw material of the liquid gum plug diverting agent mainly includes by quality hundred
The following components of number meter:
Monomer 10~25%, crosslinking agent 0.05~0.5%, initiator 0.1~0.5%, inorganic aggregates 1~5% and additive
0.01~0.1%；
Wherein, the additive include in ethylenediamine tetra-acetic acid, disodium ethylene diamine tetraacetate, thiocarbamide or sodium citrate at least
It is a kind of.
2. liquid gum plug diverting agent according to claim 1, which is characterized in that the raw material mainly includes by hundred parts of quality
The following components of number meter:
The monomer 15~20%, the crosslinking agent 0.1~0.3%, the initiator 0.2~0.3%, the inorganic aggregates 2
~4% and the additive 0.05~0.08%.
3. liquid gum plug diverting agent according to claim 1, which is characterized in that the monomer includes acrylamide or 2-
Any one of acrylamide-2-methyl propane sulfonic.
4. liquid gum plug diverting agent according to claim 1, which is characterized in that the crosslinking agent includes chromic acetate, six Asias
Tetramine, N, any one of N '-methylene-bisacrylamide, resorcinol, catechol or phenolic aldehyde.
5. liquid gum plug diverting agent according to claim 1, which is characterized in that the initiator includes ammonium persulfate, idol
Any one of nitrogen bis-isobutyronitrile, potassium peroxydisulfate or sodium hydrogensulfite.
6. liquid gum plug diverting agent according to claim 1, which is characterized in that the inorganic aggregates includes nanometer titanium dioxide
Any one of silicon, bentonite, montmorillonite, graphite powder or mica powder.
7. the preparation method of liquid gum plug diverting agent described in any one of claims 1-6, which is characterized in that specifically include that
Mix the raw material of the liquid gum plug diverting agent.
8. the preparation method of liquid gum plug diverting agent according to claim 7, which is characterized in that the mixing liquid
The step of raw material of rubber plug diverting agent includes:
Mix the monomer, the inorganic aggregates and water, after homogeneous again with the initiator, the crosslinking agent, the addition
Agent mixing.
9. a kind of liquid gum plug diverting agent, which is characterized in that the raw material of the liquid gum plug diverting agent mainly includes by quality hundred
The following components of number meter:
16~18% acrylamide, 0.05~0.07% N,N methylene bis acrylamide, 0.2~0.4% persulfuric acid
Ammonium, 4~5% nano silica and 0.02~0.03% thiocarbamide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN111410945A (en) * | 2020-03-24 | 2020-07-14 | 中国石油天然气股份有限公司 | Capsule temporary plugging well killing fluid and preparation method thereof |
| CN111574976A (en) * | 2020-06-28 | 2020-08-25 | 四川格瑞迪斯石油技术有限公司 | Enhanced leaking stoppage gel and preparation method thereof |
| CN112554855A (en) * | 2020-12-02 | 2021-03-26 | 西安石油大油气科技有限公司 | Method for improving oil recovery ratio by continuous phase composite oil displacement |
| CN112646075A (en) * | 2021-01-22 | 2021-04-13 | 山东颖慧园环保科技有限公司 | Preparation method of polyacrylamide |
| CN115386354A (en) * | 2022-08-23 | 2022-11-25 | 长江大学 | Self-degradable liquid rubber plug, preparation method and application thereof, and temporary plugging method of gas well |
| CN115491066A (en) * | 2022-06-15 | 2022-12-20 | 浙江虹达特种橡胶制品有限公司杭州分公司 | Powder coating and application thereof |
| CN116445145A (en) * | 2022-01-08 | 2023-07-18 | 大庆油田有限责任公司 | Suitable for CO 2 Temporary plugging agent for driving gas channeling well operation of ultra-low permeability high-temperature oil reservoir |
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