CN106590559B - The nano combined frozen glue of heavy oil thermal recovery fleeing proof - Google Patents
The nano combined frozen glue of heavy oil thermal recovery fleeing proof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/504—Compositions based on water or polar solvents
- C09K8/506—Compositions based on water or polar solvents containing organic compounds
- C09K8/508—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/512—Compositions based on water or polar solvents containing organic compounds macromolecular compounds containing cross-linking agents
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- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/58—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
- C09K8/592—Compositions used in combination with generated heat, e.g. by steam injection
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- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/84—Compositions based on water or polar solvents
- C09K8/86—Compositions based on water or polar solvents containing organic compounds
- C09K8/88—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/887—Compositions based on water or polar solvents containing organic compounds macromolecular compounds containing cross-linking agents
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- C—CHEMISTRY; METALLURGY
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- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/10—Nanoparticle-containing well treatment fluids
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Abstract
The present invention provides the nano combined frozen glue of heavy oil thermal recovery fleeing proof, the frozen glue is made of 0.4 part~0.5 part of host agent, 0.1 part~0.3 part of organic chrome cross linker, 0.1 part~0.5 part of inorganic chromium cross linker, 1 part~1.5 parts of hardening agent, 0.2 part~0.4 part of stabilizer, 0.1 part~0.5 part of dehydration inhibitor, excess water, dosage is parts by weight, and the sum of parts by weight of component are 100；Host agent is partially hydrolyzed polyacrylamide (PHPA), organic chrome cross linker is malonic acid chromium, inorganic chromium cross linker is attached most importance to sodium chromate: sodium sulfite=1:1~3, hardening agent is silica solution nanoparticle: amino silane=2~5:1, stabilizer is thiocarbamide, dehydration inhibitor is one of polyphosphate and amino phosphonates or combines, polyphosphate when combination: amino phosphonates=1~4:1.Optional 50 DEG C~180 DEG C of the gelling temperature of frozen glue provided by the present invention, gelation time is adjustable within the scope of 12~60h, and gel strength is big, viscoplasticity is good, heatproof retention ability is strong, does not have dehydrating phenomena within aging 3 months under the conditions of 180 DEG C, being capable of channeling during selective shut-off heavy crude heat extraction.
Description
Technical field
The present invention relates to a kind of envelopes to alter agent, the specifically nano combined frozen glue of heavy oil thermal recovery fleeing proof.
Background technique
The a large amount of exploitations and utilization of petroleum resources are allowed to increasingly in short supply, and the exploitation and utilization of viscous crude can then alleviate high-quality stone
The scarcity of oily resource.The density of viscous crude is big, and viscosity high fluidity is poor, and exploitation difficulty is high, is mainly exploited at present using thermal recovery mode
Viscous crude, common thermal process have steam soak and steam drive etc..For different viscous crude resources, by core intersection, heterogeneous
Property etc. geologic(al) factors influence, and injection steam and formation fluid between compatibility influence, thermal recovery middle and later periods be easy hair
Raw channeling phenomenon.Especially when thermal recovery round increases, for offtake pattern Encryption Well away from reduction, channeling phenomenon is more obvious, reduces and steams
The utilization efficiency of vapour, Heavy Oil Thermal Recovery Effect are deteriorated.Therefore, developing effective thermal recovery envelope, to alter agent extremely urgent.
Existing thermal recovery envelope, which alters agent mainly, grain-type water shutoff agent, cement slurry class blocking agent, high temperature foam blocking agent, emulsified asphalt envelope
Alter the types such as agent, alkali lignin/tannin extract gel plugging agent.In order to solve the poor (granular pattern of selective shut-off effect existing for above-mentioned blocking agent
Blocking agent, cement slurry class blocking agent), high temperature auxiliary agent lack (high temperature foam blocking agent), preparation condition complicated (emulsified asphalt envelope alters agent), at
The problems such as glue temperature excessively high (alkali lignin/tannin extract gel plugging agent), the high temperature gel plugging agent of acrylamide polymer type and its compound
Envelope alters agent and has come out.Chinese invention patent application prospectus CN104629697A discloses a kind of heatproof frozen glue, each group
Divide mass percent are as follows: acrylamide/acrylyl oxy-ethyl-trimethyl salmiac copolymer 0.3%~0.5%, sodium tripolyphosphate
Or/and amido methylenephosphonic acid sodium 0.1%~0.5%, phenol 0.05%~0.15%, paraformaldehyde 0.05%~0.1%, thiocarbamide
0.2%~0.4%, sodium malonate or/and D-araboascorbic acid sodium 0.05%~0.2%, surplus are water, and the sum of each component is
100%.The frozen glue gelation time is adjustable between 15~54h, at 160 DEG C aging 180 days without dehydration shrinkage phenomenon, but the hair
It is bright to have used aldehyde crosslinking agent, in high temperature ability plastic.Chinese invention patent application prospectus CN104277802A is disclosed
A kind of high temperature resistant plural gel envelope alters agent and preparation method thereof, and parts by weight include: 85-90 parts of water, 0.1 part -0.5 part of height
Molecular polypropylene amide, 0.2 part -0.5 part of polyalcohols retarder regulator, 1 part -1.5 parts of 30% inorganic acid and 8
The water-soluble silicate of -15 parts of part, the water-soluble silicate which uses is no to the closure of steam and crude oil selective, because
And stand in channel is altered to steam and oil flow channel all has ponding, it can also be reduced while blocking channeling so as to cause blocking agent
Crude output.
Summary of the invention
The invention aims to provide heavy oil thermal recovery fleeing proof nano combined frozen glue, gelling temperature range is wide, seals to channeling
Stifled to have selectivity, retention ability is strong, and channeling closure can be carried out in 180 DEG C of reservoir media, is not dehydrated within aging 3 months.
To achieve the above object, the technical solution adopted by the present invention is that:
The nano combined frozen glue of heavy oil thermal recovery fleeing proof, the frozen glue by 0.4 part~0.5 part of host agent, 0.1 part of organic chrome cross linker~
0.3 part, 0.1 part~0.5 part of inorganic chromium cross linker, 1 part~1.5 parts of hardening agent, 0.2 part~0.4 part of stabilizer, dehydration inhibitor
0.1 part~0.5 part, excess water composition, dosage are parts by weight, and the sum of parts by weight of said components are 100；The host agent is part
Hydrolyzed polyacrylamide, the organic chrome cross linker are malonic acid chromium, and the inorganic chromium cross linker is attached most importance to sodium chromate: sodium sulfite
=1:1~3, the hardening agent are silica solution nanoparticle: amino silane=2~5:1, and the stabilizer is reducing substances sulphur
Urea, the dehydration inhibitor be one of polyphosphate and amino phosphonates or combine, polyphosphate when combination: aminophosphonic acid
Salt=1~4:1.
In the above-mentioned technical solutions, the frozen glue is by 0.5 part of host agent, 0.1 part of organic chrome cross linker~0.3 part, inorganic chromium
0.1 part~0.5 part of crosslinking agent, 1 part~1.2 parts of hardening agent, 0.2 part~0.4 part of stabilizer, dehydration inhibitor 0.1 part~0.2
Part, excess water composition, dosage are parts by weight, and the sum of parts by weight are 100.
In the above-mentioned technical solutions, the frozen glue is by 0.5 part of host agent, 0.2 part of organic chrome cross linker~0.3 part, inorganic chromium
It is 0.1 part~0.4 part of crosslinking agent, 1.08 parts~1.2 parts of hardening agent, 0.2 part~0.4 part of stabilizer, 0.1 part of dehydration inhibitor, remaining
Water composition is measured, dosage is parts by weight, and the sum of parts by weight are 100.
In the above-mentioned technical solutions, the frozen glue is by 0.5 part of host agent, 0.3 part of organic chrome cross linker, inorganic chromium cross linker
0.1 part, 1.2 parts of hardening agent, 0.4 part of stabilizer, 0.1 part of dehydration inhibitor, excess water composition, dosage is parts by weight, parts by weight
The sum of be 100.
In the above-mentioned technical solutions, the frozen glue is by 0.5 part of host agent, 0.1 part of organic chrome cross linker, inorganic chromium cross linker
0.4 part, 1.0 parts of hardening agent, 0.3 part of stabilizer, 0.2 part of dehydration inhibitor, excess water composition, dosage is parts by weight, parts by weight
The sum of be 100.
In the above-mentioned technical solutions, the frozen glue is by 0.4 part of host agent, 0.1 part of organic chrome cross linker, inorganic chromium cross linker
0.4 part, 1.5 parts of hardening agent, 0.3 part of stabilizer, 0.4 part of dehydration inhibitor, excess water composition, dosage is parts by weight, parts by weight
The sum of be 100.
In the above-mentioned technical solutions, the partially hydrolyzed polyacrylamide (PHPA) is anionic polyacrylamide, the anion
Partially hydrolyzed polyacrylamide (PHPA) relative molecular mass is 600 × 104~1200 × 104, degree of hydrolysis is 10%~30%.
In the above-mentioned technical solutions, the partial size of the silica solution nanoparticle is 10~25nm.
Above-mentioned envelope alter agent the preparation method is as follows:
1, partially hydrolyzed polyacrylamide (PHPA) is sufficiently dissolved in tap water, it is spare；According to the ratio by organic chrome cross linker, nothing
Machine chromium cross linker, hardening agent, stabilizer, dehydration inhibitor and excess water are mixed evenly；Above two solution is mixed
It stirs evenly and obtains plastic liquid.
2, it will be placed in ampoule bottle at glue, and be sintered and sealed with alcohol blast burner, and be placed in the baking oven of certain temperature aging i.e.
Above-mentioned frozen glue is obtained, optional 50 DEG C~180 DEG C of gelling temperature, different gelling temperatures corresponds to different gelation times, finally makes
Gelation time is adjustable between 12~60h.
Compared with prior art, the invention has the benefit that
1, optional wide temperature range when frozen glue plastic of the invention, without plastic at high temperature, while corresponding frozen glue at
The glue time is adjustable, and without preheating to stratum, simple process when thickened oil recovery, high-efficient, frozen glue can not only be used near wellbore zone
Sealing agent, and can be used for the deep profile controlling in remote well area.
2, the nano-pore of entire Gel Formation homogenization intersects interpenetrating structure, and stability is good, and intensity is high, heatproof moisture holding capacity
By force, can in 180 DEG C of reservoir media the not syneresis of aging 3 months.
3, effect of the frozen glue to the selective closure of channeling will not block oil flow channel, it is ensured that heavy oil production.
Specific embodiment
Convenient for more clearly understanding the present invention, now specific embodiments of the present invention are explained in detail, but this hair
Bright protection scope is not limited to this.
The nano combined frozen glue of heavy oil thermal recovery fleeing proof of the present invention is a kind of nano particle reinforced super steady frozen glue of polymer, should
Frozen glue is by 0.4 part~0.5 part of host agent, 0.1 part~0.3 part of organic chrome cross linker, 0.1 part~0.5 part of inorganic chromium cross linker, reinforcing
1 part~1.5 parts of agent, 0.2 part~0.4 part of stabilizer, 0.1 part~0.5 part of dehydration inhibitor, excess water composition, dosage is weight
Part, the sum of parts by weight of said components are 100；The host agent is partially hydrolyzed polyacrylamide (PHPA), and the organic chrome cross linker is
Malonic acid chromium, the inorganic chromium cross linker are attached most importance to sodium chromate: sodium sulfite=1:1~3, and the hardening agent is silica solution nanoparticle
Son: amino silane=2~5:1, the stabilizer are reducing substances thiocarbamide, and the dehydration inhibitor is polyphosphate and ammonia
One of base phosphonate or combination, polyphosphate when combination: amino phosphonates=1~4:1.
The frozen glue is by 0.5 part of host agent, 0.1 part~0.3 part of organic chrome cross linker, inorganic chromium cross linker 0.1 part~0.5
Part, 1 part~1.2 parts of hardening agent, 0.2 part~0.4 part of stabilizer, 0.1 part~0.2 part of dehydration inhibitor, excess water composition, dosage
For parts by weight, the sum of parts by weight are 100.
The frozen glue is by 0.5 part of host agent, 0.2 part~0.3 part of organic chrome cross linker, inorganic chromium cross linker 0.1 part~0.4
Part, 1.08 parts~1.2 parts of hardening agent, 0.2 part~0.4 part of stabilizer, 0.1 part of dehydration inhibitor, excess water composition, dosage are attached most importance to
Part is measured, the sum of parts by weight are 100.
The frozen glue by 0.5 part of host agent, 0.3 part of organic chrome cross linker, 0.1 part of inorganic chromium cross linker, 1.2 parts of hardening agent,
0.4 part of stabilizer, 0.1 part of dehydration inhibitor, excess water composition, dosage are parts by weight, and the sum of parts by weight are 100.
The frozen glue by 0.5 part of host agent, 0.1 part of organic chrome cross linker, 0.4 part of inorganic chromium cross linker, 1.0 parts of hardening agent,
0.3 part of stabilizer, 0.2 part of dehydration inhibitor, excess water composition, dosage are parts by weight, and the sum of parts by weight are 100.
The frozen glue by 0.4 part of host agent, 0.1 part of organic chrome cross linker, 0.4 part of inorganic chromium cross linker, 1.5 parts of hardening agent,
0.3 part of stabilizer, 0.4 part of dehydration inhibitor, excess water composition, dosage are parts by weight, and the sum of parts by weight are 100.
The partially hydrolyzed polyacrylamide (PHPA) is anionic polyacrylamide, the anion part hydrolyzed polyacrylamide
Relative molecular mass is 600 × 104~1200 × 104, degree of hydrolysis is 10%~30%.
The partial size of the silica solution nanoparticle is 10~25nm.
The action principle of key component and addition reason are as follows in the technical proposal for solving the technical problem of the invention
It is described:
1, host agent used in the present invention is partially hydrolyzed polyacrylamide (PHPA), and is anionic polyacrylamide, after hydrolysis
Carboxyl can be cross-linked to form reticular structure with the chromium ion in malonic acid chromium；The hardening agent silica solution nanoparticle that the present invention uses
Can be coupled together with hardening agent amino silane, formed fish reticular structure, the structure so with partially hydrolyzed polyacrylamide (PHPA)-chromium
The cross-meshed of formation, which is constituted, intersects interpenetrating structure, and final gel strength obtained is high, viscoplasticity is good.
2, the present invention used in hardening agent partial size be 10-25nm, the presence of the silica solution nanoparticle of the particle size range,
So that the network of compound frozen glue is the nano/micron pore structure of nano-pore structure and non-generic frozen glue, grid distribution is more uniform
Change, gel structure stability is stronger；In addition, silica solution nanoparticle surface has a large amount of hydroxyl, there is excellent hydrophilic energy
Power, so that frozen glue has the function of stronger moisture holding capacity and selective shut-off channeling, frozen glue is not easy syneresis, at high temperature
It is more stable.
3, the crosslinking agent that the present invention uses is chromium cross linker, different from organic phenolic crosslinkers high temperature plastic characteristic, and chromium is handed over
Join agent has excellent gel-forming property at a temperature of common oil reservoir, and final frozen glue obtained is in initial low medium temperature reservoir temperature
Under can plastic, without to stratum preheating reinject into glue, the optional range of gelling temperature is wide, be 50 DEG C~180 DEG C.
4, dehydration inhibitor polyphosphate used in the present invention or/and amino phosphonates can be inhibited by complexing
Chromium polynuclear hydroxy bridge complex ion is formed, so that gelation time is adjustable between 12~60h；In addition, dehydration inhibitor can also by with
The weak crosslinking of partially hydrolyzed polyacrylamide (PHPA) amide groups improves frozen glue stability, so that frozen glue does not take off for aging 3 months at 180 DEG C
Water.
Embodiment 1:
0.05 part of sodium dichromate, 0.05 part of sodium sulfite, 0.3 part of malonic acid chromium, 1 part of silicon are added in 47.9 parts of tap water
Colloidal sol nanoparticle, 0.2 part of amino silane, 0.4 part of thiocarbamide, 0.1 part of polyphosphate, stir evenly, dissolve it sufficiently, then
The partially hydrolyzed polyacrylamide (PHPA) that the mass concentration that 50 parts are prepared with tap water is 1% is mixed with above-mentioned solution, is stirred evenly,
It obtains of the invention at glue.At glue, the gelation time at 50 DEG C is 60h for this, and the gel strength of acquisition (breaks through vacuum degree
Method measures) it is 0.077MPa, there is no dehydrating phenomena within aging 3 months at 180 DEG C.
Using the nano combined frozen glue of heavy oil thermal recovery fleeing proof obtained above as research object, illustrated by physical simulation experiment
The thermal recovery envelope alters frozen glue to the shut-off capacity of steam.The fill out sand tube permeability of this test is 2468mD, and porosity is
38.23%, physical simulation experiment is carried out in three steps.The first step is just to yearn for injecting 180 DEG C in fill out sand tube with the flow velocity of 2ml/min
Water vapour, survey its balance pressure, according to Darcy formula calculate permeability k1.Second step is reversed with the flow velocity of 0.5ml/min
The frozen glue of 0.5PV is injected into glue, and the clear water for being subsequently injected into 0.25PV replaces, and fill out sand tube is then placed 60h at 50 DEG C.The
Three steps are 180 DEG C of the water vapours injected with the flow velocity forward direction of 2ml/min into fill out sand tube, survey it and balance pressure, calculate infiltration
Rate k2.Finally press formula E=(k1-k2)/k1× 100%, frozen glue sealing ratiod E=95.9% is calculated.
Embodiment 2:
0.1 part of sodium dichromate, 0.3 part of sodium sulfite, 0.2 part of malonic acid chromium, 0.9 part are added in 48.02 parts of tap water
Silica solution nanoparticle, 0.18 part of amino silane, 0.2 part of thiocarbamide, 0.1 part of amino phosphonates, stir evenly, and keep it sufficiently molten
Solution, then the partially hydrolyzed polyacrylamide (PHPA) that the mass concentration that 50 parts are prepared with tap water is 1% is mixed with above-mentioned solution, it stirs
It is uniformly of the invention at glue to get arriving.At glue, the gelation time at 60 DEG C is 56h for this, and the gel strength of acquisition is
0.081MPa does not have dehydrating phenomena in aging 3 months at 180 DEG C.
Using the nano combined frozen glue of heavy oil thermal recovery fleeing proof obtained above as research object, illustrated by physical simulation experiment
The thermal recovery envelope alters frozen glue to the shut-off capacity of steam.The fill out sand tube permeability of this test is 2396mD, and porosity is
36.29%, physical simulation experiment is carried out in three steps.The first step is just to yearn for injecting 180 DEG C in fill out sand tube with the flow velocity of 2ml/min
Water vapour, survey its balance pressure, according to Darcy formula calculate permeability k1.Second step is reversed with the flow velocity of 0.5ml/min
The frozen glue of 0.5PV is injected into glue, and the clear water for being subsequently injected into 0.25PV replaces, and fill out sand tube is then placed 56h at 60 DEG C.The
Three steps are 180 DEG C of the water vapours injected with the flow velocity forward direction of 2ml/min into fill out sand tube, survey it and balance pressure, calculate infiltration
Rate k2.Finally press formula E=(k1-k2)/k1× 100%, frozen glue sealing ratiod E=95.5% is calculated.
Embodiment 3:
0.2 part of sodium dichromate, 0.3 part of sodium sulfite, 0.1 part of malonic acid chromium, 0.9 part are added in 47.97 parts of tap water
Silica solution nanoparticle, 0.18 part of amino silane, 0.2 part of thiocarbamide, 0.15 part of polyphosphate, stir evenly, and keep it sufficiently molten
Solution, then the partially hydrolyzed polyacrylamide (PHPA) that the mass concentration that 50 parts are prepared with tap water is 1% is mixed with above-mentioned solution, it stirs
It is uniformly of the invention at glue to get arriving.At glue, the gelation time at 70 DEG C is 49h for this, and the gel strength of acquisition is
0.078MPa does not have dehydrating phenomena in aging 3 months at 180 DEG C.
Using the nano combined frozen glue of heavy oil thermal recovery fleeing proof obtained above as research object, illustrated by physical simulation experiment
The thermal recovery envelope alters frozen glue to the shut-off capacity of steam.The fill out sand tube permeability of this test is 2445mD, and porosity is
38.11%, physical simulation experiment is carried out in three steps.The first step is just to yearn for injecting 180 DEG C in fill out sand tube with the flow velocity of 2ml/min
Water vapour, survey its balance pressure, according to Darcy formula calculate permeability k1.Second step is reversed with the flow velocity of 0.5ml/min
The frozen glue of 0.5PV is injected into glue, and the clear water for being subsequently injected into 0.25PV replaces, and fill out sand tube is then placed 49h at 70 DEG C.The
Three steps are 180 DEG C of the water vapours injected with the flow velocity forward direction of 2ml/min into fill out sand tube, survey it and balance pressure, calculate infiltration
Rate k2.Finally press formula E=(k1-k2)/k1× 100%, frozen glue sealing ratiod E=95.0% is calculated.
Embodiment 4:
0.15 part of sodium dichromate, 0.25 part of sodium sulfite, 0.1 part of malonic acid chromium, 0.8 part of silicon are added in 48 parts of tap water
Colloidal sol nanoparticle, 0.2 part of amino silane, 0.3 part of thiocarbamide, 0.2 part of polyphosphate, stir evenly, dissolve it sufficiently, then
The partially hydrolyzed polyacrylamide (PHPA) that the mass concentration that 50 parts are prepared with tap water is 1% is mixed with above-mentioned solution, is stirred evenly,
It obtains of the invention at glue.At glue, the gelation time at 100 DEG C is 28h for this, and the gel strength of acquisition is 0.076MPa,
There is no dehydrating phenomena within aging 3 months at 180 DEG C.
Using the nano combined frozen glue of heavy oil thermal recovery fleeing proof obtained above as research object, illustrated by physical simulation experiment
The thermal recovery envelope alters frozen glue to the shut-off capacity of steam.The fill out sand tube permeability of this test is 2493mD, and porosity is
38.74%, physical simulation experiment is carried out in three steps.The first step is just to yearn for injecting 180 DEG C in fill out sand tube with the flow velocity of 2ml/min
Water vapour, survey its balance pressure, according to Darcy formula calculate permeability k1.Second step is reversed with the flow velocity of 0.5ml/min
The frozen glue of 0.5PV is injected into glue, and the clear water for being subsequently injected into 0.25PV replaces, and fill out sand tube is then placed 28h at 100 DEG C.
Third step is 180 DEG C of the water vapour injected with the flow velocity forward direction of 2ml/min into fill out sand tube, surveys it and balances pressure, calculates and seep
Saturating rate k2.Finally press formula E=(k1-k2)/k1× 100%, frozen glue sealing ratiod E=92.9% is calculated.
Embodiment 5:
0.15 part of sodium dichromate, 0.25 part of sodium sulfite, 0.1 part of malonic acid chromium, 0.8 are added in 47.95 parts of tap water
Part silica solution nanoparticle, 0.2 part of amino silane, 0.3 part of thiocarbamide, 0.2 part of polyphosphate, 0.05 part of amino phosphonates, are stirred
It mixes uniformly, dissolves it sufficiently, then the partially hydrolyzed polyacrylamide (PHPA) for being 0.9% by 50 parts of mass concentrations with tap water preparation
It mixes, stirs evenly of the invention at glue to get arriving with above-mentioned solution.At glue, the gelation time at 130 DEG C is 22h for this,
The gel strength of acquisition is 0.074MPa, does not have dehydrating phenomena within aging 3 months at 180 DEG C.
Using the nano combined frozen glue of heavy oil thermal recovery fleeing proof obtained above as research object, illustrated by physical simulation experiment
The thermal recovery envelope alters frozen glue to the shut-off capacity of steam.The fill out sand tube permeability of this test is 2361mD, porosity 36.03
Part, physical simulation experiment is carried out in three steps.The first step is that the water of 180 DEG C of injection in fill out sand tube is just being yearned for the flow velocity of 2ml/min
Steam, surveys it and balances pressure, calculates permeability k according to Darcy formula1.Second step is the flow velocity inverse injection with 0.5ml/min
At glue, the clear water for being subsequently injected into 0.25PV replaces the frozen glue of 0.5PV, and fill out sand tube is then placed 22h at 130 DEG C.Third
Step is 180 DEG C of the water vapour injected with the flow velocity forward direction of 2ml/min into fill out sand tube, surveys it and balances pressure, calculates permeability
k2.Finally press formula E=(k1-k2)/k1× 100%, frozen glue sealing ratiod E=90.4% is calculated.
Embodiment 6:
0.15 part of sodium dichromate, 0.25 part of sodium sulfite, 0.1 part of malonic acid chromium, 1 part of silicon are added in 47.3 parts of tap water
Colloidal sol nanoparticle, 0.5 part of amino silane, 0.3 part of thiocarbamide, 0.25 part of polyphosphate, 0.25 part of amino phosphonates, stirring are equal
It is even, dissolve it sufficiently, then by 50 parts with tap water prepare mass concentration be 0.8% partially hydrolyzed polyacrylamide (PHPA) with it is upper
Solution mixing is stated, is stirred evenly of the invention at glue to get arriving.At glue, the gelation time at 180 DEG C is 12h for this, is obtained
Gel strength be 0.071MPa, there is no dehydrating phenomena within aging 3 months at 180 DEG C.
Using the nano combined frozen glue of heavy oil thermal recovery fleeing proof obtained above as research object, illustrated by physical simulation experiment
The thermal recovery envelope alters frozen glue to the shut-off capacity of steam.The fill out sand tube permeability of this test is 2402mD, porosity 37.79
Part, physical simulation experiment is carried out in three steps.The first step is that the water of 180 DEG C of injection in fill out sand tube is just being yearned for the flow velocity of 2ml/min
Steam, surveys it and balances pressure, calculates permeability k according to Darcy formula1.Second step is the flow velocity inverse injection with 0.5ml/min
At glue, the clear water for being subsequently injected into 0.25PV replaces the frozen glue of 0.5PV, and fill out sand tube is then placed 12h at 180 DEG C.Third
Step is 180 DEG C of the water vapour injected with the flow velocity forward direction of 2ml/min into fill out sand tube, surveys it and balances pressure, calculates permeability
k2.Finally press formula E=(k1-k2Frozen glue sealing ratiod E=85.1% is calculated in)/k1 × 100%.
The nano combined frozen glue each group distribution ratio of heavy oil thermal recovery fleeing proof and Gel Properties parameter of embodiment 1 to embodiment 6 are converged
Always as shown in rear table.
Table 1
As seen from the above table, the nano combined frozen glue of heavy oil thermal recovery fleeing proof of the invention is by 0.4 part of partially hydrolyzed polyacrylamide (PHPA)
~0.5 part；0.1 part~0.3 part of malonic acid chromium；Sodium dichromate and 0.1 part~0.5 part of sodium sulfite, wherein sodium dichromate: sulfurous
Sour sodium=1:1~3；Silica solution nanoparticle with 1 part~1.5 parts of amino silane, wherein silica solution nanoparticle: amino silane=
2~5:1；0.2 part~0.4 part of thiocarbamide；Polyphosphate or/and 0.1 part~0.5 part of amino phosphonates, wherein poly when combination
Phosphate: amino phosphonates=1~4:1, excess water composition, dosage are parts by weight, and the sum of parts by weight of said components are 100.
Optional 50 DEG C~180 DEG C of gelling temperature, the optional 12~60h of gelation time, gel strength is above 0.07Mpa, by force
It spends higher.The nano combined frozen glue of heavy oil thermal recovery fleeing proof of the invention alters with stronger closure steam during heavy crude heat extraction
Ability, sealing ratiod are all larger than 85%；Frozen glue alternative of the present invention blocks channeling without blocking oil channel, can effectively block
Steamchanneling, and then increase heavy crude heat extraction recovery ratio.
It is other unspecified to belong to the prior art.
Claims (3)
1. the nano combined frozen glue of heavy oil thermal recovery fleeing proof, it is characterised in that: the frozen glue is by 0.5 part of host agent, organic chrome cross linker 0.1
Part, 0.4 part of inorganic chromium cross linker, 1.0 parts of hardening agent, 0.3 part of stabilizer, 0.2 part of dehydration inhibitor, excess water composition, dosage
For parts by weight, the sum of the parts by weight of said components are 100；The host agent is partially hydrolyzed polyacrylamide (PHPA), and the Organic Chromium is handed over
Connection agent is malonic acid chromium, and the inorganic chromium cross linker is attached most importance to sodium chromate: sodium sulfite=1:1~3, and the hardening agent is silica solution
Nanoparticle: amino silane=2~5:1, the stabilizer are thiocarbamide, and the dehydration inhibitor is polyphosphate and amino phosphine
One of hydrochlorate or combination, polyphosphate when combination: amino phosphonates=1~4:1.
2. the nano combined frozen glue of heavy oil thermal recovery fleeing proof according to claim 1, it is characterised in that: the partial hydrolysis poly- third
Acrylamide is anionic polyacrylamide, and the anion part hydrolyzed polyacrylamide relative molecular mass is 600 × 104~
1200×104, degree of hydrolysis is 10%~30%.
3. the nano combined frozen glue of heavy oil thermal recovery fleeing proof according to claim 1, it is characterised in that: the silica solution nanoparticle
The partial size of son is 10~25nm.
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| CN109025894B (en) * | 2017-06-08 | 2021-10-22 | 中国石油化工股份有限公司 | Steam channeling plugging method for horizontal well for thermal recovery of thickened oil |
| CN107118751A (en) * | 2017-06-10 | 2017-09-01 | 大庆东油睿佳石油科技有限公司 | A kind of inorganic gel profile control agent and its application method for being applicable oil recovery by heating |
| CN108531159B (en) * | 2018-04-11 | 2021-01-01 | 东北石油大学 | High-temperature plugging agent system for heavy oil thermal recovery oil reservoir |
| CN110591679B (en) * | 2019-10-16 | 2020-09-18 | 西南石油大学 | Granular profile control agent adaptive to size of pore throat of stratum and preparation method thereof |
| CN115746808B (en) * | 2021-09-06 | 2024-04-30 | 中国石油天然气股份有限公司 | Plugging agent and application thereof |
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