CN110484226A - Kill-job diverting agent and preparation method thereof - Google Patents
Kill-job diverting agent and preparation method thereof Download PDFInfo
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- CN110484226A CN110484226A CN201810463746.4A CN201810463746A CN110484226A CN 110484226 A CN110484226 A CN 110484226A CN 201810463746 A CN201810463746 A CN 201810463746A CN 110484226 A CN110484226 A CN 110484226A
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- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
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Abstract
The invention discloses a kind of kill-job diverting agents and preparation method thereof, belong to field of oilfield chemistry.The kill-job is obtained with diverting agent by the component cross-link of following mass percent: cross-linking monomer 1.0%~5.0%, oil 1.0%~5.0%, dispersing agent 0.5%~2.0%, crosslinking agent 2.0%~5.0%, polyalcohol 2.0%~10.0%, gel breaker 0.05%~1.0%, surplus are water；Cross-linking monomer is natural plant gum.Viscosity is low before the diverting agent plastic, is easy to pump note operation, and viscosity is high after plastic, and broad application temperature range is resistant to 120 DEG C of high temperature, after being contacted with acidic materials can rapid break, the de-plugging time is short, also, natural plant gum is small to the injury of reservoir after breaking gel.
Description
Technical field
The present invention relates to field of oilfield chemistry, in particular to a kind of kill-job diverting agent and preparation method thereof.
Background technique
Before oil/gas well workover treatment, in order to avoid blowout occurs, generally requires high density well control fluids and carry out circulation kill-job.
However, the density of usually used inorganic salts well killing fluid or organic salt well killing fluid is limited, for high-pressure oil-gas well there are well kick,
The security risks such as blowout.Barite, Iron Ore Powder etc. are added into well killing fluid to be existed and sink with the density of kill-weight fluid
Drop, stability it is poor, it is big on formation damage, influence Oil & Gas Productivity the problems such as.Also, it after carrying out kill-job, needs to release kill-job
Effect.Based on above-mentioned it is found that it is very necessary for providing a kind of kill-job with diverting agent.
The relevant technologies provide a kind of kill-job diverting agent, which includes: macromolecule thickener, crosslinking agent, oxidation
Gel breaker, clay stabilizer, cleanup additive, fungicide and pH adjusting agent.The diverting agent be cross-linked into frozen glue rubber plug in the wellbore and
Play the role of closure and kill-job, glue de-plugging can be broken under the action of aoxidizing gel breaker and temperature in wellbore.The diverting agent is suitable for low
Pressure oil gas well, temperature in wellbore be less than and the kill-job operation equal to 70 DEG C in.
Inventor find the relevant technologies the prior art has at least the following problems:
In the related technology due to using artificial synthesized macromolecule thickener, even if can be real under the action of aoxidizing gel breaker
Glue is now broken, but it is larger to the injury rate of reservoir.Also, the Applicable temperature of the diverting agent is lower, is not suitable for greater than 70 DEG C
In kill-job operation.
Summary of the invention
The embodiment of the invention provides a kind of kill-job diverting agents and preparation method thereof, can solve above-mentioned technical problem.Tool
Body technique scheme is as follows:
On the one hand, the embodiment of the invention provides a kind of kill-job diverting agent, the diverting agent passes through following quality hundred
The component cross-link of ratio is divided to obtain:
Cross-linking monomer 1.0%~5.0%, oil 1.0%~5.0%, dispersing agent 0.5%~2.0%, crosslinking agent 2.0%~
5.0%, polyalcohol 2.0%~10.0%, gel breaker 0.05%~1.0%, surplus are water；
The cross-linking monomer is natural plant gum.
In a kind of possible design, the natural plant gum is selected from sesbania gum, fenugreek gum, guar gum, tamarind gum, Caesalpinia spinosaKuntze
Glue, sesbania gum modifier, fenugreek gum modifier, guar gum modifier, tamarind gum modifier, in tara gum modifier extremely
Few one kind.
In a kind of possible design, the oil is selected from least one of white oil, silicone oil, diesel oil.
In a kind of possible design, the dispersing agent is selected from sorbester p17, emulsifier op-4, polyoxyethylene nonylphenol ether -6, emulsifier
At least one of EL-10, oleic acid.
In a kind of possible design, the crosslinking agent is in water-soluble borate, water-soluble titanium salt, water soluble zirconium salt
At least one.
In a kind of possible design, the crosslinking agent in sodium tetraborate, titanium tetrachloride, zirconium oxychloride at least one
Kind.
In a kind of possible design, the polyalcohol is selected from sorbierite, glycerine, ethylene glycol, 1,2-PD, Isosorbide-5-Nitrae-
At least one of butanediol, diglycol ethylene, triethylene glycol.
In a kind of possible design, the gel breaker in ammonium persulfate, potassium peroxydisulfate, sodium peroxydisulfate at least one
Kind.
On the other hand, the embodiment of the invention also provides a kind of preparation method of kill-job diverting agent, the method applications
In the above-mentioned any diverting agent referred to, which comprises
According to the mass percent of each component, oil is added in the first reactor, makes the first blender at first default turn
The lower stirring of speed；
Dispersing agent is added into the first reactor, stirring and dissolving is uniform, and cross-linking monomer is then added, and stirs evenly；
The cross-linking monomer is natural plant gum；
Water is added in the second reactor, stirs the second blender under the second preset rotation speed；
Polyalcohol, crosslinking agent, gel breaker are added into the second reactor, stirring and dissolving is uniform；
Mixed system in the first reactor is poured into the second reactor, is stirred under third preset rotation speed
Uniformly, the diverting agent is obtained.
In a kind of possible design, first preset rotation speed is 500 revs/min~1000 revs/min；
Second preset rotation speed is 100 revs/min~300 revs/min；
The third preset rotation speed is 100 revs/min~300 revs/min.
Technical solution bring beneficial effect provided in an embodiment of the present invention includes at least:
Kill-job diverting agent provided in an embodiment of the present invention, by addition cross-linking monomer (natural plant gum) and crosslinking agent, and with
The effect of other components coordinated, enables the diverting agent to crosslink reaction under the action of temperature in wellbore and shearing force,
And then rubber plug is formed, to be blocked to pit shaft.It is acted on by addition oil, and with other components coordinated, can avoid plant
Glue is rapidly dissolved in ground and just crosslinks reaction, and being conducive to will be in diverting agent pump note to pit shaft.By addition polyalcohol, and with
The effect of other components coordinated can inhibit the crosslinking central ion ionization of crosslinking agent, crosslinking agent avoided to send out natural plant gum quickly
Raw crosslinking, being conducive to will be in diverting agent pump note to pit shaft.It is acted on by adding dispersing agent, and with other components coordinated, benefit
Evenly dispersed in each component, especially later period natural plant gum is uniformly crosslinked with crosslinking agent reacts, uniform convenient for obtaining property
Rubber plug is conducive to kill-job operation.It is acted on by adding gel breaker, and with other components coordinated, in de-plugging, keeps rubber plug broken
Glue, conducive to the row's of returning operation.Viscosity is low before the diverting agent plastic, is easy to pump note operation, and viscosity is high after plastic, Applicable temperature range
Width is resistant to 120 DEG C of high temperature, after being contacted with acidic materials can rapid break, the de-plugging time is short, also, natural plant gum is after breaking gel to storage
The injury of layer is small.
Specific embodiment
Unless otherwise defined, all technical terms used in the embodiment of the present invention all have usual with those skilled in the art
The identical meaning understood.It to make the object, technical solutions and advantages of the present invention clearer, below will be to embodiment party of the present invention
Formula is described in further detail.
On the one hand, the embodiment of the invention provides a kind of kill-job diverting agent, which passes through following quality percentage
The component cross-link of ratio obtains:
Cross-linking monomer 1.0%~5.0%, oil 1.0%~5.0%, dispersing agent 0.5%~2.0%, crosslinking agent 2.0%~
5.0%, polyalcohol 2.0%~10.0%, gel breaker 0.05%~1.0%, surplus are water.Wherein, cross-linking monomer is natural plant gum.
The working principle and effect of kill-job provided in an embodiment of the present invention diverting agent are summarized below:
In use, by the mixture pump note of the diverting agent each component to the target position of pit shaft, in temperature in wellbore and pump
Under the action of infusing shearing force, natural plant gum accelerates dissolution, and crosslinks and react with crosslinking agent, so that the diverting agent Rapid gelation,
Viscoelastic solid material is formed, that is, forms rubber plug, pit shaft is blocked, reduces well head pressure, avoids pit shaft that gas occurs
It alters.
In the process, oil is acted on other each component coordinateds, and natural plant gum is avoided quickly to dissolve, and is existed convenient for natural plant gum
Simultaneously cross-linking reaction occurs for later period uniform dissolution, infuses conducive to by diverting agent pump to the target position of pit shaft.Dispersing agent is each with other
The effect of component coordinated, evenly dispersed conducive to each component, especially later period natural plant gum is uniformly crosslinked with crosslinking agent reacts,
Convenient for obtaining the uniform rubber plug of property, it is conducive to kill-job operation.Polyalcohol and other each component coordinateds act on, with crosslinking agent network
It closes, inhibits the crosslinking central ion of crosslinking agent to ionize, crosslinking agent is avoided to make natural plant gum Quick cross-linking, be conducive to pump the diverting agent and infuse
To the target position of pit shaft.
It is when kill-job operation terminates de-plugging, hydrogen ion mass fraction is molten for 0.2% or more hydrochloric acid or other acidity
Liquid injects in pit shaft, after contact with rubber plug, the gradually crosslinked action of decrease crosslinking agent, and in the common of temperature in wellbore and gel breaker
Under effect, rubber plug breaks glue, forms low viscosity water solution and oil, returns discharge pit shaft under bottom pressure effect, realizes to pit shaft
Temporary closure.
Kill-job diverting agent provided in an embodiment of the present invention, by addition cross-linking monomer (natural plant gum) and crosslinking agent, and with
The effect of other components coordinated, enables the diverting agent to crosslink reaction under the action of temperature in wellbore and shearing force,
And then rubber plug is formed, to be blocked to pit shaft.It is acted on by addition oil, and with other components coordinated, can avoid plant
Glue is rapidly dissolved in ground and just crosslinks reaction, and being conducive to will be in diverting agent pump note to pit shaft.By addition polyalcohol, and with
The effect of other components coordinated can inhibit the crosslinking central ion ionization of crosslinking agent, crosslinking agent avoided to send out natural plant gum quickly
Raw crosslinking, being conducive to will be in diverting agent pump note to pit shaft.It is acted on by adding dispersing agent, and with other components coordinated, benefit
Evenly dispersed in each component, especially later period natural plant gum is uniformly crosslinked with crosslinking agent reacts, uniform convenient for obtaining property
Rubber plug is conducive to kill-job operation.It is acted on by adding gel breaker, and with other components coordinated, in de-plugging, keeps rubber plug broken
Glue, conducive to the row's of returning operation.Viscosity is low before the diverting agent plastic, is easy to pump note operation, and viscosity is high after plastic, Applicable temperature range
Width is resistant to 120 DEG C of high temperature, after being contacted with acidic materials can rapid break, the de-plugging time is short, also, natural plant gum is after breaking gel to storage
The injury of layer is small.
Wherein, the mass percent of cross-linking monomer can be 1.0%, 2.0%, 3.0%, 4.0%, 5.0% etc..The matter of oil
Measuring percentage can be 1.0%, 2.0%, 3.0%, 4.0%, 5.0% etc..The mass percent of dispersing agent can for 0.5%,
0.8%, 1.1%, 1.4%, 1.7%, 1.9%, 2.0% etc..The mass percent of crosslinking agent can for 2.0%, 3.0%,
4.0%, 5.0% etc..The mass percent of polyalcohol can for 2.0%, 3.0%, 4.0%, 5.0%, 6.0%, 7.0%,
8.0%, 9.0%, 10.0% etc..The mass percent of gel breaker can for 0.05%, 0.09%, 0.1%, 0.2%, 0.3%,
0.4%, 0.5%, 0.6%, 0.7%, 0.9%, 1% etc..
Above-mentioned to refer to, natural plant gum and other each component coordinateds act on, and cross-linking plastic forms the glue for blocking pit shaft
Plug is small to the injury of reservoir after de-plugging.Natural plant gum can be selected as a variety of, based on cheap, be easy to obtain, hurt to reservoir
Under the premise of evil is small, provide following example: natural plant gum is selected from sesbania gum, fenugreek gum, guar gum, tamarind gum, tara gum, field
Cyanines glue modifier, fenugreek gum modifier, guar gum modifier, tamarind gum modifier, at least one in tara gum modifier
Kind.
That is, natural plant gum can selected from it is above-mentioned it is several in any one, two kinds, three kinds, four kinds, five kinds, six kinds, seven kinds,
Eight kinds, nine kinds or all ten kinds.
When natural plant gum is mixture, the mass ratio of each component is not especially limited, for example, work as natural plant gum
When selected from guar gum and tamarind gum, the mass ratio of the two can be 1:1,1:2,1:3,2:1,2:3,2:5 etc..
When natural plant gum is the mixture of sesbania gum, fenugreek gum, guar gum, the mass percent of three can for 1:1:1,
1:2:2,1:3:3,2:1:1,2:1:3,2:5:3 etc..
As an example, natural plant gum is selected from sesbania gum, fenugreek gum, guar gum and its modifier.
Cheap, the easy acquisition of above-mentioned several plant glue, and the mutually matched performance between other components is good.
Wherein, the modifier of sesbania gum can be carboxy methylation sesbania gum, and the modifier of guar gum can be hydroxypropylation
Guar gum or carboxyl hydroxypropyl guar gum, fenugreek gum modifier can be Hydroxypropyl Fenugreek Gum, and tamarind gum modifier can be with
For carboxy methylation tamarind gum, tara gum modifier can be hydroxypropyl tara gum.
Above-mentioned to refer to, oil is acted on other components coordinated, be can avoid natural plant gum and is quickly dissolved and crosslink reaction,
It is uniformly dissolved conducive to natural plant gum in the later period, and cross-linking reaction occurs.Oil can be selected a variety of, based on cheap, be easy to obtain
It takes, under the premise of compatible with other reagent intermiscibilities, provides following example: oily at least one in white oil, silicone oil, diesel oil
Kind.
That is, oil can selected from it is above-mentioned it is several in any one, two kinds or be three kinds of mixture.When oil is mixing
When object, the mass ratio of each component is not especially limited.For example, white when oil is the mixture of white oil and silicone oil
The mass ratio of oil and silicone oil can be 1:1,1:2,1:3,2:1,2:1,2:5 etc..It is white when oil is above-mentioned three kinds of mixture
Oil, silicone oil, diesel oil mass ratio can be for 1:1:1,1:2:2,1:3:3,2:1:1,2:1:3,2:5:1 etc..
As an example, oil is selected from least one of 5# white oil, methyl-silicone oil, 0# diesel oil.
Cheap, the easy acquisition of above-mentioned several oil, the effect acted on natural plant gum and other components coordinated are good.
Above-mentioned to refer to, dispersing agent and other components coordinated act on, conducive to making each component be uniformly dispersed, convenient for obtaining property
The uniform rubber plug of energy.Based on being easy cheap, under the premise of dispersion effect is good, following example is provided:
Dispersing agent is selected from least one of sorbester p17, emulsifier op-4, polyoxyethylene nonylphenol ether -6, Emulsifier EL-10, oleic acid.
That is, dispersing agent is selected from any one of the above, two kinds, three kinds, the mixtures of four kinds or five kinds.When dispersing agent is
When mixture, the ratio of each component is not especially limited.For example, when dispersing agent is sorbester p17 and emulsifier op-4
When mixture, the mass ratio of the two can be 1:1,1:2,1:3,2:1,2:3,2:5 etc..When dispersing agent is sorbester p17, emulsification
Agent OP-4, polyoxyethylene nonylphenol ether -6 mixture when, the mass ratio of three can be 1:1:1,1:2:2,1:3:3,2:1:1,2:1:
3,2:5:1 etc..When dispersing agent is the mixture of sorbester p17, emulsifier op-4, polyoxyethylene nonylphenol ether -6, Emulsifier EL-10, four
Mass ratio can be 1:1:1:1,1:2:2:2,1:3:3:2,2:1:1:2,2:1:3:1,2:5:1:1 etc..
As an example, dispersing agent is sorbester p17 and/or oleic acid.
Cheap, the effect that is easy to obtain, also, being acted on other components coordinated of above two dispersing agent
It is good.
In embodiments of the present invention, crosslinking agent is for making natural plant gum crosslink reaction.Crosslinking agent can select a variety of, In
It based on temperature in wellbore is adapted to, is easy under the premise of obtaining, crosslinking agent can be selected from water-soluble borate, water-soluble titanium salt, water
At least one of dissolubility zirconates.
That is, crosslinking agent is selected from any of the above-described kind, two kinds, three kinds of mixture.When crosslinking agent is mixture, for each group
The mass ratio divided is not especially limited.For example, when the mixture that crosslinking agent is water-soluble borate and water-soluble titanium salt
When, the mass ratio of the two can be 1:1,1:2,1:3,2:1,2:3,2:5 etc..When crosslinking agent is above-mentioned three kinds of mixture
When, the mass ratio of three can be 1:1:1,1:2:2,1:3:3,2:1:1,2:1:3,2:5:1 etc..
As an example, crosslinking agent is selected from least one of sodium tetraborate, titanium tetrachloride, zirconium oxychloride.
That is, crosslinking agent can selected among the above any one, the mixtures of two kinds or three kinds.
Above-mentioned crosslinking agent is selected, cross-linking ion is made to be located at center, when being acted on other each component coordinateds, is conducive to fast
The reaction that speed is realized crosslinking or is not crosslinked.
Above-mentioned to refer to, polyalcohol and other components coordinated act on, and can inhibit crosslinking agent and Quick cross-linking reaction, benefit occurs
In by diverting agent pump note to pit shaft.It based on cheap, is being easy under the premise of obtaining, is providing following example:
Polyalcohol is selected from sorbierite, glycerine, ethylene glycol, 1,2-PD, 1,4-butanediol, diglycol ethylene, three sweet
At least one of alcohol.
That is, polyalcohol selected from it is above-mentioned it is several in any one, two kinds, three kinds, four kinds, five kinds, six kinds or seven kinds
Mixture.When polyalcohol is mixture, the mass ratio of each component is not especially limited.For example, work as polyalcohol
When for the mixture of sorbierite and glycerine, the mass ratio of the two can be 1:1,1:2,1:3,2:1,2:3,2:5 etc..When more
First alcohol be sorbierite, glycerine, ethylene glycol three mixture when, the mass ratio of three can be 1:1:1,1:2:2,1:3:
3,2:1:1,2:1:3,2:5:1 etc..When the mixture that polyalcohol is sorbierite, glycerine, ethylene glycol, 1,2-PD
When, four mass ratio can be 1:1:1,1:2:2,1:3:3,2:1:1,2:1:3,2:5:1 etc..
As an example, polyalcohol is sorbierite and/or triethylene glycol.
Cheap, the easy acquisition of above two polyalcohol, also, the coordinated effect between other each components
Effect it is good.
Above-mentioned to refer to, gel breaker can make temporarily to block up the broken glue of rubber plug, conducive to the row's of returning operation of diverting agent.It is being based on being easy to obtain
Take, make temporarily to block up under acid solution rubber plug break glue effect it is good under the premise of, provide following example:
Gel breaker is selected from least one of ammonium persulfate, potassium peroxydisulfate, sodium peroxydisulfate.
That is, gel breaker be selected among the above any one, the mixtures of two kinds or three kinds.When gel breaker is mixture
When, the mass ratio of each component is not especially limited.For example, when gel breaker is the mixed of ammonium persulfate and potassium peroxydisulfate
When closing object, the mass ratio of ammonium persulfate and potassium peroxydisulfate can be 1:1,1:2,1:3,2:1,2:3,2:5 etc..When gel breaker is
When above-mentioned three kinds of mixture, ammonium persulfate, potassium peroxydisulfate, sodium peroxydisulfate mass ratio can be 1:1:1,1:2:2,1:3:
3,2:1:1,2:1:3,2:5:1 etc..
As an example, gel breaker is sodium peroxydisulfate.Cheap, the easy acquisition, with other components of sodium peroxydisulfate
Between mating reaction effect it is good, especially under acidic environment, break glue effect it is good.
On the other hand, the embodiment of the invention provides a kind of preparation method of kill-job diverting agent, this method is applied to upper
It states in any diverting agent referred to, this method comprises:
According to the mass percent of each component, oil is added in the first reactor, makes the first blender at first default turn
The lower stirring of speed.
Dispersing agent is added into first reactor, stirring and dissolving is uniform, and cross-linking monomer is then added, and stirs evenly.Wherein,
Cross-linking monomer is natural plant gum.
Water is added in the second reactor, stirs the second blender under the second preset rotation speed.
Polyalcohol, crosslinking agent, gel breaker are added into second reactor, stirring and dissolving is uniform.
Mixed system in first reactor is poured into second reactor, stirs evenly, obtains under third preset rotation speed
To diverting agent.
Above-mentioned preparation method is simple, conducive to extemporaneous preparation kill-job diverting agent.Also, above-mentioned preparation method can slow down friendship
Join the action time of agent and gel breaker, infuses conducive to by diverting agent pump to the target position of pit shaft.
As an example, the first preset rotation speed is 500 revs/min~1000 revs/min, such as can be 500 revs/min
Clock, 600 revs/min, 700 revs/min, 800 revs/min, 900 revs/min, 1000 revs/min etc..Second preset rotation speed is
100 revs/min~300 revs/min；Third preset rotation speed be 100 revs/min~300 revs/min, such as can for 100 turns/
Minute, 140 revs/min, 180 revs/min, 210 revs/min, 260 revs/min, 280 revs/min, 300 revs/min.
Each revolving speed is arranged such, conducive to uniformly mixing between each component or uniform dissolution, further, it is possible to make crosslinking agent
With gel breaker will not snap action in natural plant gum.
First reactor and second reactor can be the reaction kettle with blender.
Hereinafter the present invention will be further described through by specific embodiment.
In following specific embodiments, condition person is not specified in related operation, according to normal conditions or manufacturer
It is recommended that condition carry out.It is raw materials used production firm is not specified and specification person be can be with conventional products that are commercially available.
Embodiment 1
A kind of diverting agent is present embodiments provided, which is prepared by the following method to obtain:
0.5 kilogram of 5# white oil is added in the reaction kettle A of 5 liters of first blenders of band, opens the first blender, revolving speed is
800 revs/min.0.3 kilogram of sorbester p17 is added into reaction kettle A, is stirred, is uniformly dissolved.Then it is added into reaction kettle A
0.6 kilogram of sesbania gum, is uniformly mixed, and obtains sticky, pasty mixture.
45.87 kilograms of tap water are added in the reaction kettle B of 80 liters of second blenders of band, open the second blender, revolving speed
It is 300 revs/min.1.5 kilograms of sorbierites, 1.2 kilograms of sodium tetraborates and 0.03 kilogram of sodium peroxydisulfate are added into reaction kettle B,
It is stirred, is uniformly dissolved.
Mixed system in reaction kettle A is all poured into reaction kettle B, stirring 10 is continued with 300 revs/min of mixing speed
Minute, obtain the kill-job diverting agent of 50 kilograms of suspensions provided in this embodiment.
Embodiment 2
A kind of diverting agent is present embodiments provided, which is prepared by the following method to obtain:
2.4 kilograms of methyl-silicone oils are added in the reaction kettle A of 10 liters of first blenders of band, open the first blender, revolving speed
It is 900 revs/min.0.8 kilogram of oleic acid is added into reaction kettle A, is stirred, is uniformly dissolved.Then it is added into reaction kettle A
2.4 kilograms of guar gums, are uniformly mixed, and obtain sticky, pasty mixture.
37.1 kilograms of tap water are added in the reaction kettle B of 80 liters of second blenders of band, open the second blender, revolving speed is
200 revs/min.4.5 kilograms of triethylene glycols, 2.4 kilograms of sodium tetraborates and 0.4 kilogram of potassium peroxydisulfate, stirring are added into reaction kettle B
It mixes, be uniformly dissolved.
Mixed system in reaction kettle A is all poured into reaction kettle B, stirring 10 is continued with 200 revs/min of mixing speed
Minute, obtain the kill-job diverting agent of 50 kilograms of suspensions provided in this embodiment.
Embodiment 3
A kind of diverting agent is present embodiments provided, which is prepared by the following method to obtain:
1.2 kilograms of 0# diesel oil are added in the reaction kettle A of 5 liters of first blenders of band, open the first blender, revolving speed is
600 revs/min.0.6 kilogram of oleic acid is added into reaction kettle A, is stirred, is uniformly dissolved.Then it is added into reaction kettle A
1.2 kilograms of fenugreek gums, are uniformly mixed, and obtain sticky, pasty mixture.
43.2 kilograms of tap water are added in the reaction kettle B of 80 liters of second blenders of band, open the second blender, revolving speed is
200 revs/min.2.4 kilograms of glycerine, 1.2 kilograms of titanium tetrachlorides and 0.2 kilogram of ammonium persulfate, stirring are added into reaction kettle B
It mixes, be uniformly dissolved.
Mixed system in reaction kettle A is all poured into reaction kettle B, stirring 10 is continued with 200 revs/min of mixing speed
Minute, obtain the kill-job diverting agent of 50 kilograms of suspensions provided in this embodiment.
Application Example 1
The gel-forming property and de-plugging performance for the kill-job diverting agent that this application embodiment provides 1~embodiment of embodiment 3
It is evaluated.Specific evaluation method are as follows:
(1) it is tested before diverting agent plastics using six fast rotational viscometers in 20 DEG C, 170s-1It is apparent viscous under shear rate
Degree, to judge whether diverting agent is conducive to pump note.
(2) diverting agent is placed under different temperatures, with tack-free for judgment basis, tests its gelation time.And give plastic
Rubber plug pressure afterwards sees whether the fast quick-recovery of energy, to judge its viscoplasticity.
(3) when the rubber plug after plastic being placed in 120 DEG C, aging 8h, 16h, for 24 hours, after 48h, observe its state respectively.Using
In 120 DEG C, 170s after high temperature rheometer test diverting agent plastic 0.5h-1Apparent viscosity under shear rate.
(4) rubber plug after plastic is put into the container for the hydrochloric acid solution for being 0.27% equipped with hydrogen ion mass fraction, salt
Acid is 1:1 with the mass ratio of rubber plug, and temperature is 50~70 DEG C, records the gel breaking time of rubber plug, and measure breaking glue solution 20 DEG C,
170s-1Apparent viscosity under shear rate.
Aforesaid operations are carried out to the diverting agent that 1~embodiment of embodiment 3 provides respectively, and by reference record in the following table 1, table
2, table 3, in table 4.
Table 1
As shown in Table 1, the apparent viscosity before the diverting agent plastic that 1~embodiment of embodiment 3 provides is small, meets the pump of pit shaft
Note condition.As it can be seen that kill-job provided in an embodiment of the present invention is small with the apparent viscosity before diverting agent plastic, meets pump note and require.
Table 2
As shown in Table 2, the diverting agent that 1~embodiment of embodiment 3 provides as the temperature increases accelerate by gelation time, is pumping
Note has high temperature resistance to after pit shaft, can plastic be rubber plug.Also, the diverting agent plastic that 1~embodiment of embodiment 3 provides
After rubber plug, rubber plug is pressed, rubber plug being capable of fast quick-recovery.As it can be seen that after kill-job provided in an embodiment of the present invention diverting agent plastic
Viscoplasticity it is good, and suitable for high temperature wellbore environment.
Table 3
As shown in Table 3,1~embodiment of embodiment 3 provide diverting agent plastic formed rubber plug in 8h, 16h, for 24 hours, 48h
It is afterwards still viscoelastic solid state.
The rubber plug provided using 1~embodiment of high temperature rheometer testing example 3, in 120 DEG C, 170s-1Under shear rate
Apparent viscosity be respectively 30124mPas, 35665mPas, 33277mPas.As it can be seen that provided in an embodiment of the present invention temporary
Hyperviscosity characteristic is shown after blocking agent plastic, meets the requirement of kill-job operation.
Table 4
It as shown in Table 4, is 50 DEG C in temperature in wellbore after the diverting agent plastic that 1~embodiment of embodiment 3 provides forms rubber plug
Gel breaking time at~70 DEG C is short, and the apparent viscosity of the breaking glue solution of formation is small, conducive to the row's of returning operation.As it can be seen that the embodiment of the present invention
The kill-job diverting agent of offer acid solution and temperature in wellbore effect under, can rapid break, also, formed breaking glue solution it is apparent
Viscosity is small, conducive to the row's of returning operation, meets the requirement of kill-job operation.
Application Example 2
This application embodiment can be carried out evaluation to the practical application for the kill-job diverting agent that embodiment 2 provides.Specific mistake
Journey are as follows: production is amplified according to the formula and preparation method of embodiment 2, has obtained the kill-job diverting agent of 10t suspension,
Job execution is temporarily blocked up for grinding 47 well kill-job of small stream.When construction, using the high-pressure pump of fracturing unit truck by 10t kill-job diverting agent from oil pipe
Inject pit shaft target position.0.5h after the completion of kill-job is injected with diverting agent, well head oil pressure are down to 29MPa by the 60MPa before constructing,
Detection blocks successfully, subsequent carry out workover treatment without has channeling.After workover treatment, hydrogen ion mass fraction is injected to pit shaft
For 0.27% hydrochloric acid 42t.1 day after the completion of hydrochloric acid injection, well head oil pressure restores to 60MPa, the pressure well that drives a well temporarily stifled rubber plug
After breaking gel return drain, measure its viscosity be 3mPas, de-plugging success.
As it can be seen that diverting agent provided in an embodiment of the present invention can be advantageously applied in kill-job operation, kill-job effect is good, holds
Easy de-plugging can satisfy field operation requirement.
The foregoing is merely presently preferred embodiments of the present invention, the protection scope being not intended to limit the invention, all in this hair
Within bright spirit and principle, any modification, equivalent replacement, improvement and so on should be included in protection scope of the present invention
Within.
Claims (10)
1. a kind of kill-job diverting agent, which is characterized in that the diverting agent is obtained by the component cross-link of following mass percent
It arrives:
Cross-linking monomer 1.0%~5.0%, oil 1.0%~5.0%, dispersing agent 0.5%~2.0%, crosslinking agent 2.0%~
5.0%, polyalcohol 2.0%~10.0%, gel breaker 0.05%~1.0%, surplus are water；
The cross-linking monomer is natural plant gum.
2. diverting agent according to claim 1, which is characterized in that the natural plant gum is selected from sesbania gum, fenugreek gum, Guar
Glue, tamarind gum, tara gum, sesbania gum modifier, fenugreek gum modifier, guar gum modifier, tamarind gum modifier, thorn
At least one of mysorethorn glue modifier.
3. diverting agent according to claim 1, which is characterized in that oily at least one in white oil, silicone oil, diesel oil
Kind.
4. diverting agent according to claim 1, which is characterized in that the dispersing agent is selected from sorbester p17, emulsifier op-4, cream
At least one of agent OP-6, Emulsifier EL-10, oleic acid.
5. diverting agent according to claim 1, which is characterized in that the crosslinking agent is selected from water-soluble borate, water solubility
At least one of titanium salt, water soluble zirconium salt.
6. diverting agent according to claim 5, which is characterized in that the crosslinking agent is selected from sodium tetraborate, titanium tetrachloride, oxygen
At least one of zirconium chloride.
7. diverting agent according to claim 1, which is characterized in that the polyalcohol is selected from sorbierite, glycerine, second two
At least one of alcohol, 1,2-PD, 1,4-butanediol, diglycol ethylene, triethylene glycol.
8. diverting agent according to claim 1, which is characterized in that the gel breaker is selected from ammonium persulfate, potassium peroxydisulfate, mistake
At least one of sodium sulphate.
9. a kind of preparation method of kill-job diverting agent, which is characterized in that the method is applied to any one of claim 1~8
In the diverting agent, which comprises
According to the mass percent of each component, oil is added in the first reactor, makes the first blender under the first preset rotation speed
Stirring；
Dispersing agent is added into the first reactor, stirring and dissolving is uniform, and cross-linking monomer is then added, and stirs evenly；It is described
Cross-linking monomer is natural plant gum；
Water is added in the second reactor, stirs the second blender under the second preset rotation speed；
Polyalcohol, crosslinking agent, gel breaker are added into the second reactor, stirring and dissolving is uniform；
Mixed system in the first reactor is poured into the second reactor, is stirred under third preset rotation speed equal
It is even, obtain the diverting agent.
10. according to the method described in claim 9, it is characterized in that, first preset rotation speed is 500 revs/min~1000
Rev/min；
Second preset rotation speed is 100 revs/min~300 revs/min；
The third preset rotation speed is 100 revs/min~300 revs/min.
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| CN111518532A (en) * | 2020-06-05 | 2020-08-11 | 西安奥德石油工程技术有限责任公司 | Staged fracturing temporary plugging agent for horizontal well and preparation method thereof |
| CN112457832A (en) * | 2020-10-21 | 2021-03-09 | 中国石油化工股份有限公司中原油田分公司石油工程技术研究院 | Jelly glue valve suitable for high-sulfur-content gas well oil pipe screw thread and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111518532A (en) * | 2020-06-05 | 2020-08-11 | 西安奥德石油工程技术有限责任公司 | Staged fracturing temporary plugging agent for horizontal well and preparation method thereof |
| CN112457832A (en) * | 2020-10-21 | 2021-03-09 | 中国石油化工股份有限公司中原油田分公司石油工程技术研究院 | Jelly glue valve suitable for high-sulfur-content gas well oil pipe screw thread and preparation method thereof |
| CN112457832B (en) * | 2020-10-21 | 2023-01-20 | 中国石油化工股份有限公司中原油田分公司石油工程技术研究院 | Jelly glue valve suitable for high-sulfur-content gas well oil pipe screw thread and preparation method thereof |
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