CN106479465A - A kind of profile-controlling and plugging agent and its preparation method and application - Google Patents
A kind of profile-controlling and plugging agent and its preparation method and application Download PDFInfo
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- CN106479465A CN106479465A CN201510549163.XA CN201510549163A CN106479465A CN 106479465 A CN106479465 A CN 106479465A CN 201510549163 A CN201510549163 A CN 201510549163A CN 106479465 A CN106479465 A CN 106479465A
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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 present invention relates to oil field development technical field, particularly to a kind of profile-controlling and plugging agent for oilwell water shutoff profile control.Described water shutoff agent includes following component：With the mass percent of water shutoff agent, the polysaccharide of the polysaccharide of 1-15%, preferably 2-10%；0.5-10% suspension stabilizer, preferably 1-6% suspension stabilizer；The gel strength accelerator of the gel strength accelerator of 0.5-20%, preferably 2-10%；Surplus join liquor stream body.Present invention also offers a kind of prepare as above the method for water shutoff agent and its should.
Description
Technical field
The present invention relates to oil field development technical field, particularly to a kind of profile-controlling and plugging agent for oilwell water shutoff profile control and its system
Preparation Method and application.
Background technology
Progress into middle and late stage with oil field development, groove, bottom water coning or injection water, Bian Shui are altered due to water layer and advances by leaps and bounds, make
Oil well premature water breakthrough or water logging.In order to remove or reducing water logging, the flowing of water and the stream changing water drive W/O in water production control layer
Dynamic direction, improves water drive oil recovery, needs to carry out Plugging Water Zones section construction using closure water preparation on producing well or injection well
Operation.Oilwell water shutoff is to safeguard the normal important measures producing of oil well, and especially in the oil reservoir of high water cut rate, water blockoff is more to increase
The sweep efficiency of water, improves the important means of recovery ratio, is the oil field important content that surely oil control water conservancy project is made, it is for the section in oil field
Can reduce discharging and research and development has important researching value and practical significance.
The performance of water shutoff agent determines the final raising recovery ratio effect of oil well after plugging construction, the water blockoff of domestic at present main use
Agent type includes：Inorganic salts water shutoff agent, polymer gel class water shutoff agent, resinae water shutoff agent, foam class profile-controlling and plugging agent etc..
In the oil reservoir water plugging profile control agent system for high salinity, cross-linked polymeric species water shutoff agent is because its salt is quick, temperature-sensitive and multivalence from
Flocculation etc. of son and so that its range of application is restricted, cement and inorganic particle or precipitation class water shutoff agent have preferable heat-resistant salt-resistant
Performance, but because of it entrance depth in porous media limited and be not suitable for deep process.To sum up, existing water shutoff agent system is resistance to
Can not have concurrently in the performances such as warm nature, salt tolerance, resistance to sewage and the feature of environmental protection it is impossible to meet instantly complicated all the more oil reservoir development ring
Border and environmental regulation require, and need the new profile-controlling and plugging agent system of exploitation badly to meet site operation application.
Now with the requirement increasingly stringent of Law on Environmental Protection Laws ＆ Regulations all over the world, the feature of environmental protection of water shutoff agent is also highlighted to be emphasized,
Especially environmentally sensitive to operation on the sea etc. oil well.Research finds, polysaccharide water shutoff agent, especially microbial polysaccharide class block up
Water preparation extraordinary can suit this demand.Specifically, microbial polysaccharide is typically produced by bacterial fermentation, and human body is not had
Any toxic and side effects are it is ensured that the healthy and safe requirement of construction operation personnel；Simultaneously water shutoff agent injection stratum after, through 1 year
The left and right time is decomposable asymmetric choice net, is fully converted to carbon dioxide and water, also will not bring any pollution to stratum.
Although microbial polysaccharide class water shutoff agent has significant advantage, related supporting technology is simultaneously immature, is opened with existing
Hair-like condition, is difficult to apply in field practice.This is mainly manifested in prior art and focuses primarily upon raising microbial polysaccharide class water blockoff
In the gel strength of agent, have ignored the suspension stability of the profile control system in water shutoff agent, thus constrain the scene of such water shutoff agent
Practical application.
Profile-controlling and plugging agent system Contraction in Site is different according to oil development situation, water outlet situation, joins liquid measure and typically arrives hundreds of
About thousands of sides, injection length more than 2 days, the longest sustainable two weeks.Big liquid measure and long-time process for preparation need to adjust
Cut open water shutoff agent system and there is preferable suspension stability, it is to avoid each component of water shutoff agent system reaches stratum desired area in injection fluid
During occur layering, cause water shutoff agent gel-forming property difference it is impossible to realize stratum exhalant canal is completely blocked, thus leading to apply
Work industry failure.Meanwhile, the suspension stability of existing microbial polysaccharide class profile modification system is poor, joins liquor stream body in standing process
Notable sedimentation and lamination occurred after middle half an hour.At the scene during construction operation, early stage injection fluid is clamp-oning well
After mouthful, migrate downwards with water shutoff agent fluid, the solid phase particles thing in water shutoff agent system can be in pit shaft and nearly pit shaft area sinks
Fall is assembled, and causes water shutoff agent to cannot be introduced into earth formation deep exhalant canal, and causes to inject pressure rapid increase it is impossible to complete design
Construction injection rate.It is deposited in pit shaft and in the solid formation short time of pit shaft near wellbore zone, forms high viscous frozen glue, lead to pit shaft
Blocking and the pollution of oil well production section, have larger construction risk and potential safety hazard.
For this present situation, need badly and develop a kind of profile-controlling and plugging agent with suspension stability, have simultaneously preferable temperature tolerance,
Salt-resistance, resistant aqueouss and the feature of environmental protection, are required with adapting to instantly complicated all the more oil reservoir development environment and environmental regulation, full
Sufficient site operation application.
Content of the invention
In order to overcome above-mentioned defect of the prior art, one of present invention provides a kind of profile-controlling and plugging agent, and it includes following component：
With the mass percent of water shutoff agent, the polysaccharide of the polysaccharide of 1-15%, preferably 2-10%；0.5-10% suspension stabilizer, preferably
For 1-6% suspension stabilizer；The gel strength accelerator of the gel strength accelerator of 0.5-20%, preferably 2-10%；1-20%'s
The cross-linked inhibitor of cross-linked inhibitor, preferably 3-15%；Surplus join liquor stream body.
Inventor finds in substantial amounts of research, high molecular polymer and inorganic mineral particles is mixed for the profile control body of water shutoff agent
In system, particularly in the profile control system of application and polysaccharide water shutoff agent, the suspension stability of profile control system can be greatly improved, with
There occurs the change of matter as the profile control system making polysaccharide water shutoff agent.That is, before this, related research is very big
The experimentation stage is stuck on degree, mainly based on the gel strength of polysaccharide water shutoff agent and gelation mechanism experimentation, closes
The plastic process of note polysaccharide, and pass through the present invention so that this technology, from truly entering site operation application, possesses
Popularizing application prospect in oil and gas development field.By the present invention, make this technology live from truly entering operation,
Solve polysaccharide water shutoff agent system after formulated fluids, the suspension stability difficult problem in construction injection process, and by adjustment
The ratio of high molecular polymer and inorganic mineral particles in suspension stabilizer, be obviously improved polysaccharide water shutoff agent gelling strength and
Plugging effect, has highlighted polysaccharide water shutoff agent advantage in the application.In the present invention, the addition of suspension stabilizer makes polysaccharide block up
Water preparation system can meet water shutoff agent and inject long-time stable requirement in the hypertonic exhalant canal of oil-well strata for the fluid, increased water blockoff
Agent fluid injection distance in the earth formation, so that polysaccharide water shutoff agent system both can achieve the closure in oil well nearly pit shaft area, also may be used
Realize the deep profile controlling of oil reservoir.Solid phase components in suspension stabilizer provide solid support for profile control agent gel space network simultaneously,
In the water shutoff agent injection plugging action to stratum apopore road for the fluid, the plugging strength to formation pore can be obviously improved.
Therefore, in a specific embodiment, described suspension stabilizer includes high molecular polymer and inorganic mineral particles.
Inventor substantial amounts of research in find, the invention solve polysaccharide profile-controlling and plugging agent system injection,
A stability difficult problem, makes this technology from truly entering operation scene it is ensured that the site operation safety of this technology
And success rate.Therefore the present invention is applied to the polysaccharide water shutoff agent formula system applied at scene and has important practical significance, and right
The Sustainable Exploitation in oil field has significant economic benefit and environmental benefit.
The polysaccharide water shutoff agent system comprising suspension stabilizer in the present invention has preferable heatproof, salt resistance, resistance to sewage and the feature of environmental protection
Energy.Wherein heatproof is up to 120 DEG C, and can tolerate total salinity 200,000 mg/l, calcium and magnesium 10,000 mg/l stratum water, can directly adopt
Prepared with Oil-well Reservior Water.Profile-controlling and plugging agent system can contain microbial fermentation product simultaneously, i.e. polysaccharide, and it in the earth formation can be complete
Degraded, to human body, no any harm, has the higher feature of environmental protection.Profile control compared with existing water shutoff agent system, in the present invention
Water shutoff agent system has significant advantage, can meet unconventionaloil pool development environment application increasingly complicated at present, and extensively be closed
The environmental regulation of note requires, and has broad application prospects.
In research process, inventor finds, suspending stabilized agent content is too low can not to play its due effect, only to one
Fixed content, for example, during 0.15wt%, just can fade in its effect, and with the increase of content, within the specific limits, it suspends steady
Fixed effect is consequently increased, reach 3wt% when, its performance to optimum degree, afterwards with content continuation increase and,
Although its suspending stabilized effect does not have declining, other performances, the gelling strength of such as profile-controlling and plugging agent system receives
Impact, therefore, in a specific embodiment, weight/mass percentage composition in described water shutoff agent for the suspension stabilizer should control
In certain scope, for example, it is possible to be 0.5-10t%；Preferably described percentage composition is 1-6%.
In a detailed embodiment, described suspension stabilizer includes macromolecular compound and inorganic mineral particles.
Research finds, high molecular polymer has the suspending stabilized performance coordinating potentiation, such as Wei with inorganic mineral particles after mixing
At least one in blue glue, polyacrylamide, arabic gum, gellan gum and cyclodextrin；Therefore, in a specific embodiment,
Described high molecular polymer includes at least one in welan gum, polyacrylamide, arabic gum, gellan gum and cyclodextrin；Excellent
Choosing includes one or more of welan gum, polyacrylamide and arabic gum；More preferably include welan gum.
Research also finds, bentonite in inorganic mineral particles, silicon dioxide, aluminium sesquioxide and magnesium oxide and high molecular polymerization
After thing mixing, there is prominent suspending stabilized performance.Therefore, in a specific embodiment, inorganic mineral particles include swollen
At least one in profit soil, silicon dioxide, aluminium sesquioxide and magnesium oxide；Preferably include bentonite, silicon dioxide and three oxidations
At least one in two aluminum；More preferably include bentonite.
In a specific embodiment, particle diameter≤500 μm of described inorganic mineral particles；Preferably described particle diameter≤100 μm,
And >=100nm；More preferably described particle diameter≤20 μm, and >=300nm.
Wherein, described particle diameter refers to the mean diameter of inorganic mineral particles.
Research also finds, the size of inorganic mineral particles is strong to the suspending stabilized performance of polysaccharide profile modification system and plastic
Degree has large effect.Inorganic mineral particles are oversized, and such as, during more than 1000 μm, system will reach preferably outstanding
I, needs to increase particulate matter addition.Particulate matter can form spatial network during profile-controlling and plugging agent plastic and support, its
When middle solid formation content is higher, for example, more than 10%, system gel strength can be led to significantly reduce, gel space net on microcosmic
Network is disperseed by particulate matter, and gel molecular cannot form tight connection, causes profile-controlling and plugging agent system performance to reduce.Inorganic mineral
When particle size is less, e.g., less than 100nm, nano-particle it may appear that agglomeration, causes to receive in the presence of surface energy
Rice grain difficulties in dispersion in formulated fluids, and in solution, the effective grain size of nano-particle also can be significantly higher than initial particle.Cause
This, according to experiment, particle diameter≤500 μm of described inorganic mineral particles；Preferably described particle diameter≤100 μm, and >=100nm；More
Preferably described particle diameter≤20 μm, and >=300nm.
Research finds, by adjusting the suspension with the additional proportion of inorganic mineral particles to polysaccharide water shutoff agent system for the high molecular polymer
Stability and sealing characteristics have appreciable impact, and the ratio of described high molecular polymer and described inorganic mineral particles is 1:4-20；
Preferably optimal proportion is 1:7-15.High molecular polymer and inorganic mineral particles can play collaborative increasing in polysaccharide water shutoff agent system
Effect acts on, and inorganic mineral particles are existed with solid phase particles thing form in formulated fluids, and surface particles electric charge is identical, in solution
In mutually exclusive, simultaneously because Brownian movement, particulate matter is in homogeneous distribution in the solution.High molecular polymer is being prepared
Also relatively uniform distribution can be in, polymer macromolecule keeps free dispersity in the solution, but simultaneously also mutual in fluid
Effect, forms loose spatial network.Due to two kinds of component physical arrangements and discrete form difference, macromole and inorganic mineral
Grain can be complementary to one another, and inorganic mineral particles are distributed in the spatial network of macromolecule interaction, simultaneously inorganic mineral particles
Mutual electrical charge rejection between thing, two kinds of components form dual suspending stabilized system, to polysaccharide water shutoff agent in water shutoff agent injection fluid
System has stronger suspending stabilized performance.Consider suspension stability at the scene in operation for the polysaccharide water shutoff agent to require and seal
Stifled performance, need to be optimized to both the above component dosage.Inorganic mineral particles thing addition is excessive, such as inorganic mineral particles
Addition in mass, account for more than or equal to it water shutoff agent gross mass 10% when, the suspending stabilized of water shutoff agent system can be reduced
Property and sealing characteristics.High molecular polymer addition is excessive, also can reduce the gelling strength of water shutoff agent system.Inorganic ore deposit in right amount
The addition of composition granule thing can directly lift the plugging strength to stratum apopore gap for the polysaccharide water shutoff agent, improves polysaccharide gel structure on ground
Delay in layer micropore and erosion resistibility, are obviously improved the water plugging effect of polysaccharide water shutoff agent system.
In a specific embodiment, described gel strength accelerator is included in metaborate, ortho-borate and multi-borate
At least one, preferably include multi-borate.And/or
In a specific embodiment, described liquor stream body of joining is selected from tap water, the mixed emulsion of stratum sewage, white oil and water,
And at least one in high-salinity brine.
In a specific embodiment, when described join in liquor stream body contain white oil when, described white oil account for described in join liquor stream body
Content≤40wt%.In a specific embodiment, total salinity content≤200g/L in described high-salinity brine, excellent
Select total calcium-magnesium content≤10g/L.
In a specific embodiment, stratum sewage can be for coming from the oil-polluted water during oil development.
Gel-forming property using the polysaccharide water shutoff agent joining liquid fluid formulation above is unaffected, and sealing characteristics all can meet construction and make
Industry requires.
In a specific embodiment, also include with the water conservation of the 0.5-15% of the mass percent of water shutoff agent in water shutoff agent
Agent；Water-retaining agent can selected from acrylamide and acrylic acid salt crosslinking copolymerization thing, starch grafted acrylate crosslinking copolymerization thing and/or in
At least one, preferably starch grafted acrylate crosslinking copolymerization thing.
In addition, inventor finds in substantial amounts of research, the compound containing at least one hydroxyl particularly contains at least three
The compound of individual hydroxyl adds in the profile control system of water shutoff agent, can greatly improve the plastic control of profile control system, so that making
The performance of profile control agent there occurs the change of matter.That is, before this, the research of polysaccharide profile modification system is mainly with polysaccharide
Gel strength and gelation mechanism experimentation based on, the plastic process of concern polysaccharide, and pass through the present invention so that this technology
From truly entering site operation application, possesses the popularizing application prospect in oil and gas development field.Suppression is passed through in this invention
Connected by the hydrogen bond of external temperature activated between polysaccharide in profile modification system processed, formed tightly with polysaccharide at low temperature using cross-linked inhibitor
Close combination, and in temperature elevation process, slow release, reach the plastic process of controllable adjustment profile modification system.According further to
Concrete exploitation reservoir characteristic, can reasonable adjusting formula, formed and there is heatproof, resistance to sewage, salt tolerant and the controlled formula body of plastic
System, has highlighted polysaccharide water shutoff agent advantage in the application, and the therefore present invention is applied to joining of the polysaccharide water shutoff agent of scene application
Cube system has important practical significance, and has significant economic benefit and environmental benefit for the Sustainable Exploitation in oil field.
By adding appropriate such cross-linked inhibitor in water shutoff agent, water shutoff agent can be made to keep flow regime in 72 hours,
And when the temperature of water shutoff agent is risen to 95 degrees Celsius, water shutoff agent can in 30 minutes Rapid gelation, this fully show polysaccharide block up
Water preparation has temperature-sensitive plastic characteristic, has in the oil mining that heat credit excites in thick oil steam drive thermal production well etc., the present invention carries
The water shutoff agent going out has long-acting shut-off capacity to edge-bottom water.And the polysaccharide water shutoff agent in the present invention has adjustable plastic temperature
Degree, can keep flow regime at low temperature for a long time, when ambient temperature rises to more than gelling temperature, can Rapid gelation, thus aobvious
Show that there is preferable water shutoff agent gel-forming property.
Through substantial amounts of it is experimentally confirmed that present invention achieves the gelation time of polysaccharide profile-controlling and plugging agent system controlled (0.5h-72h),
Gelling temperature is adjustable (50 DEG C -120 DEG C), and water shutoff agent have heatproof, salt resistance, acid and alkali-resistance (pH3-9), waste water and
The advantage of environmental protection, has significant advantage in existing water shutoff agent system, can meet unconventionaloil pool exploitation ring increasingly complicated at present
Border application and extensively concerned environmental regulation require.
In a specific embodiment, described cross-linked inhibitor includes the compound of at least one hydroxyl；Preferably, described
Cross-linked inhibitor is selected from glycerol, sodium gluconate, carbamide, lignosulfonates, polyvinyl alcohol, polyether polyol, polyhydroxy
Base aldehydes and at least one of polyhydroxy ketone；Wherein polyhydroxy aldehyde be selected from glucose, xylose, mannose, arabinose, half
Lactose, at least one of glyceraldehyde, polyhydroxy ketone is selected from 3-Hydroxybutanone, at least one of dihydroxy acetone；It is highly preferred that
Described cross-linked inhibitor is selected from glycerol, sodium gluconate, carbamide, at least one of lignosulfonates.
In the profile-controlling and plugging agent of the present invention, the polysaccharide of wherein one of component can be the many of chemical industry synthesis and/or Microbe synthesis
Sugar.In a specific embodiment, described polysaccharide includes curdlan (condensation polysaccharide) and/or xanthan gum etc., and these are many
Sugar is by the linear macromolecule of glucose glycosidic bond links, has plus thermoset characteristic, has higher stablizing at normal temperatures
Property, carcinogenecity and other toxic and side effects are not had to human body.Preferably described polysaccharide by by yellow fiberss Zymomonas mobiliss (Cellulomonas),
Agrobacterium (Agrobacterium), less dynamic sphingolipid alteromonas (Sphingomonas paucimobilis) and Bacillus alcaligeness
At least one in the polysaccharide that (Alcaligenes Castellani＆Chalmers) synthesizes；Optimum described polysaccharide is included by product alkali bar
The curdlan that bacterium (Alcaligenes Castellani＆Chalmers) synthesizes.
Polysaccharide water shutoff agent system has the advantages that heatproof, salt resistance, acid and alkali-resistance (pH3-9), directly can be joined by oilfield sewage simultaneously
System, has higher working security and the feature of environmental protection, and all can achieve efficiently closure in the above conditions.With existing profile-controlling and plugging agent
Compare, there is significant advantage, application prospect is extensive.
The two of the present invention also provide a kind of method preparing above-mentioned water shutoff agent, and it comprises the steps：To join in liquor stream body at least according to
Secondary addition A reagent, B reagent and C reagent, and optionally D reagent and E reagent, and every kind of addition reagent in body
After mix homogeneously in system, add follow-up reagent, last mix homogeneously obtains described water shutoff agent；Wherein, A reagent is selected from and suspends
At least one in stabilizer, polysaccharide and water-retaining agent；B reagent is selected from least one in suspension stabilizer, polysaccharide and water-retaining agent；
C reagent is selected from gel strength accelerator, and/or water-retaining agent；D reagent is selected from gel strength accelerator, and/or water-retaining agent；E tries
Agent is selected from gel strength accelerator, and/or water-retaining agent；And ensure in described system, to contain described suspension stabilizer, polysaccharide, coagulate
Glue strength promoter, and optionally water-retaining agent；Preferably suspension stabilizer, polysaccharide, gel strength accelerator and optionally protect
Water preparation adds follow-up reagent after being added separately to mix homogeneously in system.
That is, the method is mainly included in join and being at least separately added into suspension stabilizer, polysaccharide, water-retaining agent in liquor stream body, coagulates
Glue strength promoter, and long-time Stirring 1-2 hour after adding every kind of reagent, complete to the reagent being eventually adding
It is finished product after mix homogeneously, place stand-by.Wherein, in general, the addition sequence of suspension stabilizer and polysaccharide will be prior to solidifying
The order of glue strength promoter；The addition sequence of suspension stabilizer and polysaccharide can exchange；Addition to water-retaining agent or its addition are suitable
Sequence does not have the requirement of harshness, and can select to be added without, or adds prior to any one other material, or is adding any one
Add after planting other materials.
Further, since suspending agent includes at least two components in the particular embodiment, i.e. high molecular polymer and inorganic mineral
Grain.Therefore, in general, during preparing water shutoff agent, can first high molecular polymer and inorganic mineral particles be mixed
Close uniformly, be then then added in the system prepared it is also possible to according to the principle of as above addition sequence, be added separately in system,
Or be added in batches in system.
In a typical embodiment, each component in profile-controlling and plugging agent is by weight percentage：
Concrete operations are：
A, to join add in liquid pool 40% join liquor stream body, start high rotating speed and stir (less than 1000 revs/min), be simultaneously introduced outstanding
Floating stabilizer, continuously stirred 30 minutes to 2 hours, for example, can be 1 hour, so that suspension stabilizer is equal in a fluid
Even dispersion and abundant aquation.
B, suspension stabilizer after dispersed and abundant aquation, are slowly added to polysaccharide in a fluid, and it can be in quick stirring
Be simultaneously introduced, and continuously stirred 10-60 minute, for example, can be 30 minutes, to polysaccharide join dispersed in liquor stream body；It
Add afterwards and join liquor stream body, such as addition is 40%, to ensure to join the system viscosity in liquid pool between 35mPa.s-40mPa.s.
C, addition gel strength accelerator, it can add while quick stirring, and continuously stirred 5-60 minute for example may be used
Think 10 minutes, be completely dissolved and mix homogeneously to gel strength accelerator.
D, it is slowly added to water-retaining agent, continuously stirred 10-60 minute, for example, can be 20 minutes, to water-retaining agent in formulated fluids
In dispersed.Add surplus afterwards joins liquor stream body, is sufficiently mixed.
A kind of three offer applications in oil field development for water shutoff agent as above of the present invention.
Polysaccharide water shutoff agent in the present invention has the advantages that heatproof, salt resistance, acid and alkali-resistance (pH3-9), waste water and environmental protection,
In existing water shutoff agent system, there is significant advantage, unconventionaloil pool development environment increasingly complicated at present can be met and apply and wide
Concerned environmental regulation requires.
Currently based on horizontal well, horizontal well has well yield height, speed of production to the major way of domestic unconventionaloil pool exploitation
Fast advantage, but the problem that experience edge-bottom water is advanced by leaps and bounds is more serious.Horizontal well produces aqueous rising comparatively fast, the domestic main force at present
The horizontal well in oil field more than 70% aqueous more than 80%, generally in high water cut stage.Improvement for horizontal well High water cut is main
Based on control water, water blockoff, the water plugging and profile controlling that polysaccharide water shutoff agent system can fully meet horizontal well requires.Polysaccharide water shutoff agent is being prepared
After the completion of, under room temperature, water shutoff agent fluid viscosity is relatively low, generally 10mPa.s-20mPa.s, has preferable flowing and suspends steady
Qualitative it is easy to infusion and Contraction in Site.After water shutoff agent fluid injection oil well, in the phase permeability of water shutoff agent fluid and crude oil
Under the selection of difference, in-place permeability difference and fluid injection rate, preferentially enter the preferential path that horizontal well produces section,
I.e. in water breakthrough duct.Water shutoff agent fluid has higher suspension stability, stably can be advanced into earth formation deep in water breakthrough duct,
Achievable deep profile controlling function.Water shutoff agent fluid in injection stratum is in external temperature activated and/or internal each component cross-linking reaction
Under effect, gradually it solidify to form strong rubber, realize the efficient closure to water outlet duct, play and slow down edge-bottom water fltting speed, reduce
Water ratio in oil well, reaches the purpose improving recovery ratio.
And, polysaccharide water shutoff agent does not have any toxic and side effects to human body, thus ensure that the health peace of construction operation personnel
Full requirement.Water shutoff agent, behind injection stratum, through the decomposition of 1 year about time, can be fully converted to carbon dioxide and water, right
Any pollution also will not be brought in stratum.In addition, such water shutoff agent is relatively low to the requirement joining liquor stream body, can be widely applied to ocean,
The profile control and water plugging construction operation of the region such as desert oil well.
In the present invention, term " water shutoff agent " refers in oil extraction process, because water layer alters groove, bottom water coning or injection
Water, Bian Shui advance by leaps and bounds, and make some oil well premature water breakthroughs or water logging.In order to remove or reducing water logging, the flowing of water in water production control layer
With the flow direction changing water drive W/O, improve water drive oil recovery, Plugging Water Zones section is carried out on producing well or injection well
The chemical treatments being adopted are referred to as water shutoff agent.To divide from construction technology, can be divided into selective water plugging, non-selective water blockoff,
Profile Control in Injection Well and block entity water plugging.Chemically structurally and functionally mechanism can be divided into for agent：(1) inorganic salts, such as sodium silicate and
Aluminum sulfate, sodium silicate and calcium chloride, sodium silicate and ferrous sulfate, sodium carbonate and calcium chloride etc.；(2) polymer gel class, such as
The various frozen glue of the formation such as polyacrylamide, polyacrylonitrile, lignosulfonates, biopolymerization, are being widely used at present
Class；(3) resinae water shutoff agent, including phenolic resin, epoxy resin, furfural resin and thermoplastic polymer, polyethylene, second
Alkene-vinyl acetate co-polymer etc.；(4) foam profile control water shutoff agent, coordinates solid-phase component swollen including foaming agent and various additives again
Profit soil, white lead etc., such as ABS are foaming agent, and carboxymethyl cellulose is that stabilizer forms profile control agent with bentonite for solid phase；Also have
Cationic surfactant water-plugging technique, monosilane water-plugging technique and silicic acid gel water-plugging technique etc..Wherein, polysaccharide (or claim
Be " polysaccharide ") class water shutoff agent is one of polymer gel class, described polysaccharide includes chemical industry synthesis and/or microorganism is closed
The polysaccharide becoming, microbial polysaccharide refers in particular to by the polysaccharide of specified microorganisms fermentation synthesis.
In the present invention, term " high molecular polymer " refers to pass through covalent bond weight by many identicals, simple construction unit
The high-molecular weight compounds being formed by connecting again.
In the present invention, term " inorganic mineral particles " refer to be under certain geology and physical and chemical condition metastable
The simple substance of native element and their compound, have fixing chemical composition and the internal structure determining, pattern is to have difference
The granule of physical size.
Brief description
Fig. 1 shows the gelling strength (measurement temperature is 95 DEG C) of water shutoff agent different time at 95 DEG C.
Fig. 2 shows the gelling strength (measurement temperature is 25 DEG C) in 95 DEG C of different times for the water shutoff agent.
Specific embodiment
With reference to embodiment, the present invention is described below.
The measuring apparatus of the gel strength in following examples and comparative example are the CT3 type Texture instrument of Brookfield company of the U.S., many
Directly measure after sugared water shutoff agent plastic.
In process for preparation in following examples and comparative example, churned mechanically range of speeds during mix homogeneously controls at 100 revs/min
Between 700 revs/min, the overall process for preparation of water shutoff agent system needs continuously stirred 30 minutes -5 hours.
The percentage composition of each component of the water shutoff agent in following examples and comparative example is that each component accounts for water shutoff agent gross mass in mass
Percentage ratio, including the composition component macromolecular compound of the suspending agent and percentage composition of inorganic mineral particles.Wherein, according to send out
The many experiments of a person of good sense, the macromolecular compound in the embodiment in the present invention shown below and the mass ratio of inorganic mineral particles
Example is 1:4-20, preferably 1:7-15.
Embodiment 1
1) prepare 5 parts of water shutoff agent according to constituent content each in following profile-controlling and plugging agent strong for measuring the gel under different gelation times
Degree：Curdlan 2%, suspension stabilizer 0.5%, water-retaining agent 5%, gel strength accelerator 2%, cross-linked inhibitor 5%,
Remaining is to join liquor stream body.Wherein suspension stabilizer is the welan gum of 0.08% consumption and the bentonite of 0.42% consumption, and bentonite
Most Probable distrebution particle size be 50 μm.Water-retaining agent is starch grafted acrylate crosslinking copolymerization thing.Gel strength accelerator
For multi-borate.Cross-linked inhibitor is glycerol.Part flow liquid is content 40wt% joining liquor stream body described in described white oil accounts for.2)
Suspension stabilizer, curdlan, water-retaining agent, gel strength accelerator and cross-linked inhibitor, machine is sequentially added in joining liquor stream body
500 revs/min of the rotating speed of tool stirring, water shutoff agent system entirety process for preparation needs continuously stirred 2 hours, dispersed to each component.
3) by resulting solution in 95 DEG C of plastics, gelation time is respectively 1 hour, 2.5 hours, 4 hours, 22 hours, and 53
Hour.
4) at 95 DEG C measure 3) in gained Gelling Water shutoff Agent gel strength.
Result is shown in Fig. 1.
Embodiment 2
Prepare 4 parts of water shutoff agent to be used for measuring the gel strength under different gelation times, by resulting solution in 95 DEG C of baking ovens plastic,
Gelation time respectively 2.5 hours, 4 hours, 22 hours, 53 hours.And under measurement gained difference gelation time at 25 DEG C
Gel strength.
Remaining is with embodiment 1.
Result is shown in Fig. 2.
Embodiment 3
1) prepare 5 parts of water shutoff agent according to constituent content each in following profile-controlling and plugging agent strong for measuring the gel under different gelation times
Degree：Curdlan 2%, suspension stabilizer 1%, gel strength accelerator 2%, cross-linked inhibitor 7%, remaining is to join liquor stream body.
Wherein suspension stabilizer is the welan gum of 0.15% consumption and the bentonite of 0.85% consumption, and bentonitic most Probable distrebution granule
Size is 50 μm.Water-retaining agent is starch grafted acrylate crosslinking copolymerization thing.Gel strength accelerator is ortho-borate.Crosslinked
Inhibitor is glycerol.Part flow liquid is high-salinity brine, and total salinity content therein is 200g/L.
2) suspension stabilizer, curdlan, gel strength accelerator and cross-linked inhibitor are sequentially added in joining liquor stream body, machinery
600 revs/min of the rotating speed of stirring, water shutoff agent system entirety process for preparation needs continuously stirred 1.5 hours, dispersed to each component.
3) by resulting solution in 95 DEG C of plastics, gelation time is respectively 1 hour, 2.5 hours, 4 hours, 22 hours, and 53
Hour.
4) at 95 DEG C measure 3) in gained Gelling Water shutoff Agent intensity.
Embodiment 4
Prepare 4 parts of water shutoff agent to be used for measuring the gel strength under different gelation times,
By resulting solution in 95 DEG C of baking ovens plastic, gelation time be respectively 2.5 hours, 4 hours, 22 hours, 53 hours.
And the gel strength under measurement gained difference gelation time at 25 DEG C.
Remaining is with embodiment 3.
Embodiment 5
1) prepare 5 parts of water shutoff agent according to constituent content each in following profile-controlling and plugging agent strong for measuring the gel under different gelation times
Degree：Curdlan 8%, suspension stabilizer 2%, water-retaining agent 10%, gel strength accelerator 2%, cross-linked inhibitor 6%, its
Remaining for joining liquor stream body.Wherein suspension stabilizer is the welan gum of 0.2% consumption and the bentonite of 1.8% consumption, and bentonitic
Several granular sizes can be 20 μm.Water-retaining agent is acrylamide and acrylic acid salt crosslinking copolymerization thing.Gel strength accelerator is metaboric acid
Salt.Cross-linked inhibitor is glycerol.Part flow liquid is high-salinity brine, and total calcium-magnesium content therein is 10g/L.
2) suspension stabilizer, curdlan, gel strength accelerator, cross-linked inhibitor and water conservation are sequentially added in joining liquor stream body
Agent, 300 revs/min of churned mechanically rotating speed, water shutoff agent system entirety process for preparation needs continuously stirred 3 hours, equal to each component
Even dispersion.
3) by resulting solution in 95 DEG C of plastics, gelation time is respectively 1 hour, 2.5 hours, 4 hours, 22 hours, and 53
Hour.
4) measure the intensity of the Gelling Water shutoff Agent of gained at 95 DEG C.
Embodiment 6
Prepare 4 parts of water shutoff agent to be used for measuring the gel strength under different gelation times,
By resulting solution in 95 DEG C of baking ovens plastic, gelation time be respectively 2.5 hours, 4 hours, 22 hours, 53 hours.
And the gel strength under measurement gained difference gelation time at 25 DEG C.
Remaining is with embodiment 5.
Embodiment 7
1) prepare 5 parts of water shutoff agent according to constituent content each in following profile-controlling and plugging agent strong for measuring the gel under different gelation times
Degree：Curdlan 10%, suspension stabilizer 5%, water-retaining agent 0.5%, gel strength accelerator 10%, cross-linked inhibitor 4%,
Remaining is to join liquor stream body.Wherein suspension stabilizer is the welan gum of 0.3% consumption and the bentonite of 4.7% consumption, and bentonitic
Granular size is 1 μm.Water-retaining agent is starch grafted acrylate crosslinking copolymerization thing.Gel strength accelerator is ortho-borate.
Cross-linked inhibitor is glycerol.Part flow liquid is high-salinity brine, and total calcium-magnesium content therein is 10g/L.
2) water-retaining agent, suspension stabilizer, curdlan, gel strength accelerator and crosslinked suppression are sequentially added in joining liquor stream body
Agent, 200 revs/min of churned mechanically rotating speed, water shutoff agent system entirety process for preparation needs continuously stirred 4 hours, equal to each component
Even dispersion.
3) by resulting solution in 95 DEG C of plastics, gelation time is respectively 1 hour, 2.5 hours, 4 hours, 22 hours, and 53
Hour.
4) measure the intensity of the Gelling Water shutoff Agent of gained at 95 DEG C.
Embodiment 8
Prepare 4 parts of water shutoff agent to be used for measuring the gel strength under different gelation times,
By resulting solution in 95 DEG C of baking ovens plastic, gelation time be respectively 2.5 hours, 4 hours, 22 hours, 53 hours.
And the gel strength under measurement gained difference gelation time at 25 DEG C.
Remaining is with embodiment 7.
Embodiment 9
1) prepare 5 parts of water shutoff agent according to constituent content each in following profile-controlling and plugging agent strong for measuring the gel under different gelation times
Degree：Curdlan 15%, suspension stabilizer 10%, gel strength accelerator 2%, water-retaining agent 15%, cross-linked inhibitor 9%,
Remaining is to join liquor stream body.Wherein suspension stabilizer is the welan gum of 0.5% consumption and the bentonite of 9.5% consumption, and bentonitic
Granular size is 500nm.Water-retaining agent is starch grafted acrylate crosslinking copolymerization thing.Gel strength accelerator is ortho-borate.
Cross-linked inhibitor is glycerol.Part flow liquid is content 40wt% joining liquor stream body described in described white oil accounts for.2) in joining liquor stream body
Sequentially add curdlan, suspension stabilizer, water-retaining agent, cross-linked inhibitor and gel strength accelerator, churned mechanically rotating speed
500 revs/min, water shutoff agent system entirety process for preparation needs continuously stirred 2 hours, dispersed to each component.
3) by resulting solution in 95 DEG C of plastics, gelation time is respectively 1 hour, 2.5 hours, 4 hours, 22 hours, and 53
Hour.
4) at 95 DEG C measure 3) in gained Gelling Water shutoff Agent intensity.
Embodiment 10
Prepare 4 parts of water shutoff agent to be used for measuring the gel strength under different gelation times,
By resulting solution in 95 DEG C of baking ovens plastic, gelation time be respectively 2.5 hours, 4 hours, 22 hours, 53 hours.
And the gel strength under measurement gained difference gelation time at 25 DEG C.
Remaining is with embodiment 9.
Comparative example 1
1) prepare 5 parts of water shutoff agent according to constituent content each in following profile-controlling and plugging agent to be used for measuring the little gel at present of gelation time 4
Intensity：Curdlan 2%, water-retaining agent 5%, gel strength accelerator 2%, cross-linked inhibitor 5%, remaining is to join liquor stream body.
Water-retaining agent is starch grafted acrylate crosslinking copolymerization thing.Gel strength accelerator is ortho-borate.Cross-linked inhibitor is glycerol.
Part flow liquid is content 40wt% joining liquor stream body described in described white oil accounts for.
2) curdlan, water-retaining agent, gel strength accelerator are sequentially added in joining liquor stream body, 500 turns of churned mechanically rotating speed
/ point, water shutoff agent system entirety process for preparation needs continuously stirred 2 hours, dispersed to each component.
3) by resulting solution in 95 DEG C of plastics, gelation time is respectively 1 hour, 2.5 hours, 4 hours, 22 hours, and 53
Hour.
4) measure the intensity of gained Gelling Water shutoff Agent at 95 DEG C.
Comparative example 2
Prepare 4 parts of water shutoff agent to be used for measuring the gel strength under different gelation times,
By resulting solution in 95 DEG C of baking ovens plastic, gelation time be respectively 2.5 hours, 4 hours, 22 hours, 53 hours.
And at 25 DEG C measure 3) in gained difference gelation time under gel strength.
Remaining is with comparative example 1.
Comparative example 3
1) prepare 5 parts of water shutoff agent according to constituent content each in following profile-controlling and plugging agent to be used for measuring the little gel at present of gelation time 4
Intensity：Curdlan 3%, suspension stabilizer 2%, water-retaining agent 2%, gel strength accelerator 5%, remaining is to join liquor stream body.
Water-retaining agent is starch grafted acrylate crosslinking copolymerization thing.Gel strength accelerator is ortho-borate.Part flow liquid is described white oil
Content 40wt% of liquor stream body is joined described in accounting for.
2) suspension stabilizer, curdlan, water-retaining agent, gel strength accelerator, mechanical agitation are sequentially added in joining liquor stream body
500 revs/min of rotating speed, water shutoff agent system entirety process for preparation need continuously stirred 2 hours, dispersed to each component.
3) by resulting solution in 95 DEG C of plastics, gelation time is respectively 1 hour, 2.5 hours, 4 hours, 22 hours, and 53
Hour.
4) measure the intensity of gained Gelling Water shutoff Agent at 95 DEG C.
Comparative example 4
Prepare 4 parts of water shutoff agent to be used for measuring the gel strength under different gelation times,
By resulting solution in 95 DEG C of baking ovens plastic, gelation time be respectively 2.5 hours, 4 hours, 22 hours, 53 hours.
And at 25 DEG C measure 3) in gained difference gelation time under gel strength.
Remaining is with comparative example 1.
Embodiment 11-16
1) prepare water shutoff agent according to constituent content each in following profile-controlling and plugging agent：Curdlan 3%, suspension stabilizer 3%, protect
Water preparation 2%, gel strength accelerator 2%, glycerol is respectively 0%, 5%, 10%, 15%, 20%, 30%, and remaining is to join
Liquor stream body.Water-retaining agent is starch grafted acrylate crosslinking copolymerization thing.Gel strength accelerator is multi-borate.Suspension stabilizer
Welan gum for 0.3% consumption and the bentonite of 4.7% consumption, and bentonitic granular size is 1 μm.Part flow liquid is described
White oil joins content 40wt% of liquor stream body described in accounting for.2) suspension stabilizer, curdlan, water conservation are sequentially added in joining liquor stream body
Agent, gel strength accelerator and cross-linked inhibitor, 500 revs/min of churned mechanically rotating speed, water shutoff agent system entirety process for preparation needs
Continuously stirred 2 hours, dispersed to each component.
3) by resulting solution in 70 DEG C of plastics.
4) observe 3) in water shutoff agent fluid gelation time at a certain temperature.
Embodiment 17-21
1) prepare water shutoff agent according to constituent content each in following profile-controlling and plugging agent：Xanthan gum 6%, suspension stabilizer 3%, water conservation
Agent 5%, gel strength accelerator 8%, glycerol is respectively 0%, 3%, 5%, 10%, 15%, and remaining is to join liquor stream body.
Water-retaining agent is starch grafted acrylate crosslinking copolymerization thing.Gel strength accelerator is multi-borate.Suspension stabilizer is 0.3% use
The welan gum of amount and the bentonite of 4.7% consumption, and bentonitic granular size is 1 μm.Part flow liquid accounts for described for described white oil
Join content 40wt% of liquor stream body.
2) suspension stabilizer, xanthan gum, water-retaining agent, gel strength accelerator and cross-linked inhibitor are sequentially added in joining liquor stream body,
500 revs/min of churned mechanically rotating speed, water shutoff agent system entirety process for preparation needs continuously stirred 2 hours, uniformly divides to each component
Dissipate.
3) resulting solution is placed 72 hours at 50 DEG C, observe plastic situation, if non-plastic continues to put into 95 DEG C of baking ovens,
Observe gelation time.
4) observe 3) in water blockoff agent solution plastic situation at a certain temperature.
Embodiment 22-28
The cross-linked inhibitor adding in water shutoff agent is respectively sodium gluconate, carbamide, sodium lignin sulfonate, polyvinyl alcohol, gathers
Ethoxylated polyhydric alcohol, glyceraldehyde and dihydroxy acetone.Cross-linked inhibitor content is 5%.
Remaining is with embodiment 17-21.
Embodiment 29-33
1) prepare water shutoff agent according to constituent content each in following profile-controlling and plugging agent：Xanthan gum 4%, water-retaining agent 4%, gel strength
Accelerator 6%, suspension stabilizer is respectively 0%, 1%, 2%, 4%, 6%, and remaining is to join liquor stream body.Wherein remove suspending stabilized
When agent is 0%, suspension stabilizer is the welan gum of 0.2% consumption, and remaining consumption is bentonite, and bentonitic granular size is
1μm.Water-retaining agent is starch grafted acrylate crosslinking copolymerization thing.Gel strength accelerator is multi-borate.Cross-linked inhibitor is
Glycerol.Part flow liquid is content 40wt% joining liquor stream body described in described white oil accounts for.2) sequentially add suspension in joining liquor stream body
Stabilizer, xanthan gum, water-retaining agent, gel strength accelerator and cross-linked inhibitor, 500 revs/min of churned mechanically rotating speed, water blockoff
Agent system entirety process for preparation needs continuously stirred 2 hours, dispersed to each component.
3) resulting solution is placed 3 hours at 80 DEG C, observe suspension stability and the gelling strength of water shutoff agent system.
Embodiment 34-38
The suspension stabilizer adding in water shutoff agent is respectively：
The polyacrylamide of 0.15% consumption and the silicon dioxide of 2% consumption, and the granular size of silicon dioxide is 300nm；
The arabic gum of 0.2% consumption and the aluminium sesquioxide of 2.7% consumption, and the granular size of aluminium sesquioxide is 500nm；
The gellan gum of 0.3% consumption and the bentonite of 4% consumption, and bentonitic granular size is 1 μm；
The cyclodextrin of 0.25% consumption and the magnesium oxide of 3.3% consumption, and the granular size of magnesium oxide is 500nm；
The welan gum of 0.2% consumption and the silicon dioxide of 2.7% consumption, and the granular size of silicon dioxide is 300nm.
Remaining is with embodiment 29-33.
Result
Polysaccharide Gelling Water shutoff Agent be can be seen that by the result of Fig. 1 and reached stablizing of plastic within 20 hours about at 95 DEG C
State, prolongation over time, gel-forming property keeps stable.At 95 DEG C, after 10 minutes, viscosity is i.e. quick rises for water shutoff agent fluid
Height, can form strong rubber in 1 hour about, increase over time, intensity gradually rises.The display microbial polysaccharide polymerization of this result
Thing Gelling Water shutoff Agent at 95 DEG C, can Rapid gelation, and gelling strength can reach strong rubber at 1 hour about, over time
Increase, glue gradually keeps by force stable, has preferable water shutoff agent gel-forming property.
Can be seen that microbial polysaccharide Gelling Water shutoff Agent, after 95 DEG C of plastics, is cooled to the gel strength under room temperature by the result of Fig. 2
Increase with gelation time significantly raises.When gelation time is between 2.5-4 hour, gel strength raises rapidly, gelation time
When 4 hours are between 53 hours, gel strength is linearly increasing.This result display microbial polysaccharide Gelling Water shutoff Agent is in height
To water shutoff agent, sealing characteristics at a lower temperature has significant facilitation to gelation time under temperature, is conducive to water shutoff agent thick
Oil vapour drives the long-term closure operation effectiveness of thermal production well.
Table 1
Can be seen that polysaccharide water shutoff agent 20 hours about at 95 DEG C by embodiment 1,3,5,7,9 result of table 1 is
Reach the steady statue of plastic, prolongation over time, gel-forming property keeps stable.Water shutoff agent fluid is 10 points at 95 DEG C
After clock, viscosity is i.e. quick raises, and can form strong rubber within 1 hour about, increase over time, intensity gradually rises.This result shows
Show polysaccharide water shutoff agent at 95 DEG C, can Rapid gelation, and gelling strength can reach strong rubber at 1 hour about, with when
Between increase, glue gradually keeps by force stable, has preferable water shutoff agent gel-forming property.
The result of embodiment 2,4,6,8,10 shows, polysaccharide water shutoff agent, after 95 DEG C of plastics, is cooled to solidifying under room temperature
Glue intensity significantly raises with the increase of gelation time.When gelation time is between 2.5-4, gel strength raises rapidly, during plastic
Between 4 hours between 53 hours when, gel strength be linearly increasing.This result shows polysaccharide water shutoff agent at high temperature
To water shutoff agent, sealing characteristics at a lower temperature has significant facilitation to gelation time, is conducive to water shutoff agent in viscous crude steam
Drive the long-term closure operation effectiveness of thermal production well.
The result of embodiment 11-16 show by add cross-linked inhibitor, can at a temperature of 70 DEG C the control of relative quantification many
The gelation time of saccharide water shutoff agent, gelation time is controlled between 3 hours to 70 hours.In this result display present invention
Polysaccharide water shutoff agent system can be according to Specific construction job requirements, and the crosslinking time of controlled delay water shutoff agent improves water shutoff agent
Safety in utilization.
And, in the water shutoff agent system that suspension stabilizer does not add (comparative example 1 and 2), polysaccharide water shutoff agent completes in preparation
Solid phase components rapid subsidence layering afterwards, during leading to plastic, gel dehydration is serious, and system dehydration rate ＞ 70% is it is impossible to be used for scene
Plug water construction.And the result of the result of embodiment 1-16, particularly embodiment 11-16 shows by adding suspension stabilizer,
At a temperature of 95 DEG C or 70 DEG C, the gel-forming property of polysaccharide water shutoff agent has considerable influence.After adding suspension stabilizer, water shutoff agent does not have
Occur layering and dehydrating phenomena, show that suspension stabilizer achieves polysaccharide water shutoff agent fluid suspended during preparation, plastic
Stability.In the additional proportion recommended, water shutoff agent system all can achieve larger gelling strength to suspension stabilizer.
Conclusion after the comparison of embodiment and comparative example：Polysaccharide water shutoff agent system is in each component dosage all in this patent recommended range
Under conditions of, all can form strong rubber, but the crosslinking time of profile modification system is too short to be applied it is impossible to carry out scene.By adding
Enter cross-linked inhibitor, the plastic process of adjustment profile modification system that can be controlled so that profile modification system is under conditions of 70 DEG C,
Crosslinking time, in the controlled adjustment of 3h-70h, requires according to site operation, can meet application.By adding suspension stabilizer, can
Fluid suspended stable during preparation, plastic to realize polysaccharide water shutoff agent, the water shutoff agent fluid after preparation can stablize placement one
The above time in week, required according to site operation, application can be met.
Table 2
Can be drawn by the data in table 2, by adjusting water shutoff agent system formulation, the plastic of regulation water shutoff agent that can be personalized
Temperature, as shown in Table, at 50 DEG C, water shutoff agent can keep flow regime after adding cross-linked inhibitor in 72 hours,
And when the temperature of water shutoff agent is risen to 90 DEG C, water shutoff agent can in 30 minutes Rapid gelation, show that water shutoff agent gelling temperature is controlled,
Have in the oil mining that heat credit excites in thick oil steam drive thermal production well etc., water shutoff agent proposed by the present invention has to edge-bottom water
Long-acting shut-off capacity.This result shows that the polysaccharide water shutoff agent in the present invention has adjustable gelling temperature, can grow at low temperature
Phase keep flow regime, when ambient temperature rises to more than gelling temperature, can Rapid gelation, thus display there is preferable water blockoff
Agent gel-forming property.
Table 3
Can show that the cross-linked inhibitor proposing in this patent all can achieve to polysaccharide water shutoff agent system by the data in table 3 controlled
Plastic process of inhibition, realize gelling temperature and the gelation time controllable adjustment of profile modification system, expand polysaccharide to greatest extent
The site application conditions of class profile modification system, meet site operation requirement.
Table 4
Can be drawn by the data in table 4, by adding not commensurability suspension stabilizer, the one-tenth of polysaccharide water shutoff agent at a temperature of 80 DEG C
Colloidality can have considerable influence, assumes qualitative difference.In the water shutoff agent system that suspension stabilizer does not add, polysaccharide water shutoff agent
Solid phase components rapid subsidence layering after the completion of preparing, during leading to plastic, gel dehydration is serious, and system dehydration rate reaches 70%
Above it is impossible to be used for live plug water construction.After adding suspension stabilizer, layering and dehydrating phenomena in water shutoff agent, shows
Suspension stabilizer achieves fluid suspended stability during preparation, plastic for the polysaccharide water shutoff agent.Suspension stabilizer addition mistake
The gel-forming property that will also result in polysaccharide water shutoff agent system is deteriorated it is proposed that using the dosage scope recommended in the present invention and suspending steady more
Determine the proportion of each component in agent
Table 5
The polyphosphazene polymers such as welan gum, polyacrylamide, arabic gum, gellan gum and cyclodextrin can be drawn by the data in table 5
Compound can be suspending stabilized as the present invention with inorganic mineral particles such as bentonite, silicon dioxide, aluminium sesquioxide and magnesium oxide
Agent, and all can achieve under suitable addition and in the range of high molecular polymer and the adding proportion of inorganic mineral particles right
Polysaccharide water shutoff agent system is preparing, transport, the suspension stability during injection and plastic is so that polysaccharide water shutoff agent body
Cording is for the site application conditions improving in Water in Water Shutoff in Oil Field profile control etc. in recovery ratio operation.
Claims (13)
1. a kind of profile-controlling and plugging agent, it includes following component：With the mass percent of water shutoff agent, the polysaccharide of 1-15%, preferably
Polysaccharide for 2-10%；0.5-10% suspension stabilizer, preferably 1-6% suspension stabilizer；The gel strength accelerator of 0.5-20%,
It is preferably the gel strength accelerator of 2-10%；The cross-linked inhibitor of the cross-linked inhibitor of 1-20%, preferably 3-15%；Surplus
Join liquor stream body.
2. water shutoff agent according to claim 1 is it is characterised in that described suspension stabilizer includes high molecular polymer and nothing
Machine mineral grain.
3. water shutoff agent according to claim 1 and 2 is it is characterised in that described high molecular polymer includes welan gum, gathers
At least one in acrylamide, arabic gum, gellan gum and cyclodextrin；Preferably include welan gum, polyacrylamide and I
At least one in primary glue；More preferably include welan gum.
4. the water shutoff agent according to claim 1-3 any one is it is characterised in that described inorganic mineral particles include swelling
At least one in soil, silicon dioxide, aluminium sesquioxide and magnesium oxide；Preferably include bentonite, silicon dioxide and three oxidations two
At least one in aluminum；More preferably include bentonite.
5. the water shutoff agent according to any one in claim 1-4 is it is characterised in that the particle diameter of described inorganic mineral particles
≤500μm；Preferably described particle diameter≤100 μm, and >=100nm；More preferably described particle diameter≤20 μm, and >=300nm.
6. the water shutoff agent according to any one in claim 1-5 it is characterised in that described organic high molecular polymer with
The ratio of described inorganic mineral particles is 1:4-20；Preferably described ratio is 1:7-15.
7. the water shutoff agent according to claim 5 or 6 it is characterised in that described gel strength accelerator include metaborate,
At least one in ortho-borate and multi-borate, preferably includes multi-borate；And/or
Described liquor stream body of joining includes tap water, the mixed emulsion of stratum sewage, white oil and water, and in high-salinity brine extremely
Few one kind；Preferably when described join contain white oil in liquor stream body when, described white oil account for described in join the content of liquor stream body be more than 0 and little
In equal to 40wt%；Total salinity content≤200g/L in preferably described high-salinity brine, preferably calcium and magnesium total content≤10
g/L.
8. the water shutoff agent according to any one in claim 5-7 is it is characterised in that also include in described water shutoff agent with stifled
The water-retaining agent of the 0.5-15% of the mass percent of water preparation；Preferably described water-retaining agent includes acrylamide and acrylic acid salt crosslinking copolymerization
At least one in thing and/or starch grafted acrylate crosslinking copolymerization thing, more preferably includes starch grafted acrylate crosslinking copolymerization
Thing.
9. the water shutoff agent according to any one in claim 5-8 it is characterised in that described polysaccharide include curdlan and/
Or xanthan gum；Preferably described polysaccharide includes by yellow fiberss Zymomonas mobiliss (Cellulomonas), Agrobacterium (Agrobacterium), lacks
Dynamic sphingolipid alteromonas (Sphingomonas paucimobilis) and Bacillus alcaligeness (Alcaligenes Castellani＆Chalmers)
At least one in the polysaccharide of synthesis；Optimum described polysaccharide is included by Bacillus alcaligeness (Alcaligenes Castellani＆Chalmers)
The curdlan of synthesis.
10. the water shutoff agent according to any one in claim 5-9 is it is characterised in that described cross-linked inhibitor is included at least
The compound of one hydroxyl；Preferably, described cross-linked inhibitor includes glycerol, sodium gluconate, carbamide, lignin sulfonic acid
Salt, polyvinyl alcohol, at least one of polyether polyol, polyhydroxy aldehydes and polyhydroxy ketone；Wherein polyhydroxy aldehydes includes Portugal
Grape sugar, xylose, mannose, arabinose, galactose, at least one of glyceraldehyde, polyhydroxy ketone includes 3-Hydroxybutanone
And/or dihydroxy acetone；It is highly preferred that described cross-linked inhibitor includes glycerol, sodium gluconate, carbamide and lignin sulfonic acid
At least one of salt.
A kind of 11. methods of the water shutoff agent prepared as described in any one in claim 5-10, it comprises the steps：
A reagent, B reagent and C reagent is at least sequentially added to joining in liquor stream body, and optionally D reagent and E reagent, and
And after reagent mix homogeneously in system of every kind of addition, adding follow-up reagent, last mix homogeneously obtains described water shutoff agent；
Wherein, A reagent is selected from least one in suspension stabilizer, polysaccharide and water-retaining agent；B reagent be selected from suspension stabilizer,
At least one in polysaccharide and water-retaining agent；C reagent is selected from gel strength accelerator, and/or water-retaining agent；It is strong that D reagent is selected from gel
Degree accelerator, and/or water-retaining agent；E reagent is selected from gel strength accelerator, and/or water-retaining agent；And ensure to contain in described system
There are described suspension stabilizer, polysaccharide, gel strength accelerator, and optionally water-retaining agent；
Preferably described suspension stabilizer, polysaccharide, gel strength accelerator and optionally water-retaining agent be added separately in system mixed
Follow-up reagent is added after closing uniformly.
12. methods according to claim 11 it is characterised in that described join liquor stream body and be divided into 2-3 time be added in system.
Application in oil field development for 13. water shutoff agents according to any one in claim 1-10.
Priority Applications (1)
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| CN107218021A (en) * | 2017-08-06 | 2017-09-29 | 大庆东油睿佳石油科技有限公司 | A kind of double slug type profile control agents of Fracture with low permeability oil reservoir and its application method |
| CN107288593A (en) * | 2017-08-06 | 2017-10-24 | 大庆东油睿佳石油科技有限公司 | A kind of polynary pair of slug type profile control agent of Fracture with low permeability oil reservoir and its application method |
| CN107474819A (en) * | 2017-09-06 | 2017-12-15 | 大连知微生物科技有限公司 | A kind of pressure break or profile control in-situ cross-linked bio-based frozen glue and its preparation method and application |
| CN107603575A (en) * | 2017-10-23 | 2018-01-19 | 北京斯迪莱铂油气技术有限公司 | One kind control water reservoir reconstruction method |
| CN108342189A (en) * | 2017-11-29 | 2018-07-31 | 山东省食品发酵工业研究设计院 | A kind of environment-friendly type oil extraction in oil field compound and its application based on biological polyoses |
| CN108893101A (en) * | 2018-07-05 | 2018-11-27 | 常州蓝森环保设备有限公司 | A kind of preparation method of sealing agent |
| CN109294540A (en) * | 2018-09-19 | 2019-02-01 | 中国石油天然气股份有限公司 | High-salinity-resistant profile control agent for deep oil reservoir and preparation method thereof |
| CN110373171A (en) * | 2019-07-10 | 2019-10-25 | 浙江海洋大学 | A kind of displacement of reservoir oil emulsion stable by magnetic nanoparticle |
| CN110511731A (en) * | 2019-08-22 | 2019-11-29 | 山东省食品发酵工业研究设计院 | A kind of environment-friendly type oil field profile control agent and its preparation method and application |
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| CN107218021A (en) * | 2017-08-06 | 2017-09-29 | 大庆东油睿佳石油科技有限公司 | A kind of double slug type profile control agents of Fracture with low permeability oil reservoir and its application method |
| CN107288593A (en) * | 2017-08-06 | 2017-10-24 | 大庆东油睿佳石油科技有限公司 | A kind of polynary pair of slug type profile control agent of Fracture with low permeability oil reservoir and its application method |
| CN107474819A (en) * | 2017-09-06 | 2017-12-15 | 大连知微生物科技有限公司 | A kind of pressure break or profile control in-situ cross-linked bio-based frozen glue and its preparation method and application |
| CN107474819B (en) * | 2017-09-06 | 2021-07-30 | 大连知微生物科技有限公司 | In-situ crosslinking bio-based gel for fracturing or profile control and preparation method and application thereof |
| CN107603575A (en) * | 2017-10-23 | 2018-01-19 | 北京斯迪莱铂油气技术有限公司 | One kind control water reservoir reconstruction method |
| CN108342189B (en) * | 2017-11-29 | 2020-05-15 | 山东省食品发酵工业研究设计院 | Environment-friendly oil field oil extraction compound based on biological polysaccharide and application thereof |
| CN108342189A (en) * | 2017-11-29 | 2018-07-31 | 山东省食品发酵工业研究设计院 | A kind of environment-friendly type oil extraction in oil field compound and its application based on biological polyoses |
| CN108893101A (en) * | 2018-07-05 | 2018-11-27 | 常州蓝森环保设备有限公司 | A kind of preparation method of sealing agent |
| CN109294540A (en) * | 2018-09-19 | 2019-02-01 | 中国石油天然气股份有限公司 | High-salinity-resistant profile control agent for deep oil reservoir and preparation method thereof |
| CN109294540B (en) * | 2018-09-19 | 2021-03-09 | 中国石油天然气股份有限公司 | High-salinity-resistant profile control agent for deep oil reservoir and preparation method thereof |
| CN110805408A (en) * | 2019-05-31 | 2020-02-18 | 大港油田集团有限责任公司 | Profile control process method for water injection well with packer pipe column |
| CN110805408B (en) * | 2019-05-31 | 2021-08-31 | 大港油田集团有限责任公司 | Profile control process method for water injection well with packer pipe column |
| CN110373171A (en) * | 2019-07-10 | 2019-10-25 | 浙江海洋大学 | A kind of displacement of reservoir oil emulsion stable by magnetic nanoparticle |
| CN110373171B (en) * | 2019-07-10 | 2021-07-13 | 浙江海洋大学 | Oil repellent emulsion stabilized by magnetic nanoparticles |
| CN110511731A (en) * | 2019-08-22 | 2019-11-29 | 山东省食品发酵工业研究设计院 | A kind of environment-friendly type oil field profile control agent and its preparation method and application |
| CN110699059A (en) * | 2019-10-22 | 2020-01-17 | 中国石油化工股份有限公司 | Biological polysaccharide gel for oil displacement and preparation method and application thereof |
| CN110872504A (en) * | 2019-12-09 | 2020-03-10 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | Acid-resistant strong gel plugging agent and preparation method thereof |
| CN111577197A (en) * | 2020-05-28 | 2020-08-25 | 中国石油集团渤海钻探工程有限公司 | Quick plugging method suitable for temperature of lost stratum being more than or equal to 80 DEG C |
| CN111732942A (en) * | 2020-05-28 | 2020-10-02 | 中国石油集团渤海钻探工程有限公司 | Temperature-sensitive gel plugging slurry |
| CN111577197B (en) * | 2020-05-28 | 2022-04-29 | 中国石油集团渤海钻探工程有限公司 | Quick plugging method suitable for temperature of lost stratum being more than or equal to 80 DEG C |
| CN111732942B (en) * | 2020-05-28 | 2022-08-23 | 中国石油集团渤海钻探工程有限公司 | Temperature-sensitive gel plugging slurry |
| CN111574978A (en) * | 2020-06-24 | 2020-08-25 | 中国石油大学(华东) | Jelly plugging agent, preparation method and application thereof |
| CN112280544A (en) * | 2020-10-29 | 2021-01-29 | 中国石油大学(华东) | Emulsion type precipitation profile control agent and preparation method and application thereof |
| CN114426813A (en) * | 2020-10-29 | 2022-05-03 | 中国石油化工股份有限公司 | High-temperature-resistant gel particle while-drilling plugging agent and preparation method and application thereof |
| CN112280544B (en) * | 2020-10-29 | 2022-05-17 | 中国石油大学(华东) | Emulsion type precipitation profile control agent and preparation method and application thereof |
| CN114426813B (en) * | 2020-10-29 | 2023-06-23 | 中国石油化工股份有限公司 | High-temperature-resistant gel particle plugging agent while drilling as well as preparation method and application thereof |
| CN115044356A (en) * | 2022-08-12 | 2022-09-13 | 中海油田服务股份有限公司 | Profile control and flooding agent suitable for high-temperature and high-salinity oil reservoir and preparation method thereof |
| CN115044356B (en) * | 2022-08-12 | 2022-10-25 | 中海油田服务股份有限公司 | Profile control and flooding agent suitable for high-temperature and high-salinity oil reservoir and preparation method thereof |
| CN115651619A (en) * | 2022-11-04 | 2023-01-31 | 中海石油(中国)有限公司 | Shear strength responsive intelligent profile control gel for oil field and preparation method thereof |
| CN115651619B (en) * | 2022-11-04 | 2024-04-02 | 中海石油(中国)有限公司 | Shear strength response intelligent profile control gel for oil field and preparation method thereof |
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