CN105820804A - High-salinity-resistant reservoir in-depth fluid diversion chemical agent as well as preparation method and application thereof - Google Patents
High-salinity-resistant reservoir in-depth fluid diversion chemical agent as well as preparation method and application thereof Download PDFInfo
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- CN105820804A CN105820804A CN201610220593.1A CN201610220593A CN105820804A CN 105820804 A CN105820804 A CN 105820804A CN 201610220593 A CN201610220593 A CN 201610220593A CN 105820804 A CN105820804 A CN 105820804A
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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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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/504—Compositions based on water or polar solvents
- C09K8/506—Compositions based on water or polar solvents containing organic compounds
- C09K8/508—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/5083—Compositions based on water or polar solvents containing organic compounds macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
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Abstract
The invention provides a high-salinity-resistant reservoir in-depth fluid diversion chemical agent as well as a preparation method and application thereof. The high-salinity-resistant reservoir in-depth fluid diversion chemical agent is prepared from the following raw materials by weight: 0.4-0.6 part of anti-salt polymer, 0.3-0.5 part of a crosslinking agent, 0.2-0.4 part of a stabilizer and the balance of high-salinity water. The high-salinity-resistant reservoir in-depth fluid diversion chemical agent is applied to the profile control and water shutoff during reservoir exploitation. The invention further provides a preparation method of the high-salinity-resistant reservoir in-depth fluid diversion chemical agent. The high-salinity-resistant reservoir in-depth fluid diversion chemical agent is resistant to high salinity, controllable in gelling time and high in gelling viscosity, can achieve the in-depth fluid diversion, and effectively blocks a high permeability layer, to achieve the purpose of blocking the high permeability layer of a high salinity reservoir.
Description
Technical field
The present invention relates to a kind of oil deposit deep part fluid diversion chemical agent and preparation method thereof, particularly to a kind of resistance to high mineralization
Oil deposit deep part fluid diversion chemical agent of degree and preparation method thereof, belongs to oil reservoir production technique field.
Background technology
Waterflooding development oil reservoir long-term injecting water and the injection water monolayer that causes are advanced by leaps and bounds, and interlayer contradiction, interlayer interference are extremely serious.
Profile control and water plugging technology is to solve the circulation of waterflooding development oil-field flooding inefficient, raising water-injection efficiency and ultimate recovery
Important means.
Deep rock tunneling chemical agent is the reagent in profile control and water plugging technology.But the deep liquid of the most on-the-spot application
Circulating slow to chemical agent dissolution time in high temperature, high salinity reservoirs, be weak to high salt, the gel viscosity of formation is low,
Effect duration is short, plugging effect is poor, it is impossible to meet the requirement of waterflooding development high salinity reservoirs transfer drive.In view of current deep
The above-mentioned technical barrier that portion's fluid diversion chemical agent exists, has applied for domestic and international high salinity reservoirs exploitation scene
Deep rock tunneling system, carried out substantial amounts of research work.
Along with continuing to increase of High water cut old filed development difficulty, the recovery ratio improving old filed becomes the weight of oil field development
Point research direction.Organogel class plugging technology has extremely important status in old filed water and oil control, but faces
A difficult problem be how to improve the recovery ratio under the severe reservoir condition such as high temperature and high salinity.For high temperature and high salt oil deposit, because of
General polymerization thing temperature-resistant anti-salt performance is poor, dissolves difficulty, and solution apparent viscosity is low, and poor heat stability result in deep
Transfer drive effect duration is short, and measure effect is poor.
For solving this type of difficult problem, recent domestic scholar's research emphasis is concentrated mainly on Heat Resistant and Salt Tolerant Polymer and crosslinking
The research and development aspect of agent, improves heat and salt resistance and the long-term thermal stability of gel rubber system, adapts to high temperature and high salinity oil reservoir
Adjust stifled demand.
Summary of the invention
In order to solve above-mentioned technical problem, it is an object of the invention to provide the oil deposit deep part liquid stream of a kind of resistance to high salinity
Turning to chemical agent, it is controlled that this oil deposit deep part fluid diversion chemical agent has resistance to high salinity, gelation time, becomes adhesiveness
High advantage, it is possible to realize oil deposit deep part fluid diversion, effectively block high permeability zone, reaches to block high salinity reservoirs
High permeability zone purpose.
In order to realize above-mentioned technical purpose, present invention firstly provides the oil deposit deep part fluid diversion of a kind of resistance to high salinity
Chemical agent, is that in terms of 100 weight portions, this is resistance to by the gross weight of the oil deposit deep part fluid diversion chemical agent of this resistance to high salinity
The raw material composition of the oil deposit deep part fluid diversion chemical agent of high salinity includes that the anti-salt of 0.4 weight portion-0.6 weight portion gathers
Compound, the cross-linking agent of 0.3 weight portion-0.5 weight portion, the stabilizer of 0.2 weight portion-0.4 weight portion and the high ore deposit of surplus
Change degree water.
In the oil deposit deep part fluid diversion chemical agent of the resistance to high salinity of present invention offer, it is preferable that the anti-salt of employing
Polymer is by acrylamide, sodium acrylate, Sodium styrene sulfonate, sodium itaconate and 2-acrylamido-2-14
The copolymer of two or more the material composition in alkyl ethyl sulfonic acid sodium, the relative molecular weight of the copolymer of composition
It is 6,000,000-1,000 ten thousand.
In the oil deposit deep part fluid diversion chemical agent of the resistance to high salinity of present invention offer, it is preferable that the anti-salt of employing
Polymer includes the copolymerization formed by acrylamide, sodium itaconate and 2-acrylamido-2-dodecyl ethyl sulfonic acid sodium
Thing.
In the oil deposit deep part fluid diversion chemical agent of the resistance to high salinity of present invention offer, it is preferable that the crosslinking of employing
Agent includes the combination of one or more in phenolic resin, glutaraldehyde and Biformyl.
In the oil deposit deep part fluid diversion chemical agent of the resistance to high salinity of present invention offer, it is preferable that the crosslinking of employing
Agent includes phenolic resin.
In the oil deposit deep part fluid diversion chemical agent of the resistance to high salinity of present invention offer, it is preferable that stablizing of employing
Agent includes the combination of one or more in thiourea, hydroquinone, sodium thiosulfate and sodium sulfite.
In the oil deposit deep part fluid diversion chemical agent of the resistance to high salinity of present invention offer, it is preferable that stablizing of employing
Agent includes thiourea and the compositions of hydroquinone formation that mass ratio is 1:1 or 1:2.
In the oil deposit deep part fluid diversion chemical agent of the resistance to high salinity of present invention offer, it is preferable that the high ore deposit of employing
Change degree water is by 10%wtNaCl, 0.7wt%CaCl2, 0.3wt%MgCl2Form with the water of surplus, wherein, described height
The total mass fraction of salinity water is 100wt%.
In the oil deposit deep part fluid diversion chemical agent of the resistance to high salinity of present invention offer, it is preferable that this resistance to high mineralization
Gel apparent viscosity after the oil deposit deep part fluid diversion chemical agent plastic of degree is 2.5 × 104MPa s, gelation time is
10h-24h。
Present invention also offers the application of the oil deposit deep part fluid diversion chemical agent of above-mentioned resistance to high salinity, this resistance to high mineralization
It is 1.0 × 10 that the oil deposit deep part fluid diversion chemical agent of degree is applied to salinity4mg/L-1.5×105The oil reservoir of mg/L
Profile control and water plugging.
Invention further provides the preparation method of the oil deposit deep part fluid diversion chemical agent of above-mentioned resistance to high salinity, this is prepared
Method comprises the following steps:
In concentrated water, it is sequentially added into described salt-resistant polymer, cross-linking agent and stabilizer, stirs under room temperature, prepare
The oil deposit deep part fluid diversion chemical agent of described resistance to high salinity.
In the preparation method of the oil deposit deep part fluid diversion chemical agent of the resistance to high salinity of present invention offer, by this resistance to height
The raw material of the oil deposit deep part fluid diversion chemical agent of salinity forms after stirring at normal temperature, is dried at 105 DEG C, prepares
The oil deposit deep part fluid diversion chemical agent of described resistance to high salinity.
In the preparation method of the oil deposit deep part fluid diversion chemical agent of the resistance to high salinity of present invention offer, it is preferable that
Salt-resistant polymer is prepared according to following steps:
At 10 DEG C-12 DEG C, the raw material composition adding described salt-resistant polymer in water obtains polymeric solution, molten to polymerization
Liquid adds chelating agent, is passed through nitrogen 10min-15min, add Ammonium persulfate., sodium sulfite and tetramethylethylenediamine,
Continue to be passed through nitrogen 5min, carry out pelletize, be dried and cross 60 mesh mesh screens carry out sub-sieve, obtain described salt-resistant polymer,
Wherein, every 100 weight parts of polymer solution add 0.1 weight portion-0.2 weight portion Ammonium persulfate., 0.05 weight portion-0.1
Parts by weight sodium sulfite, 0.2 weight portion-0.25 weight portion tetramethylethylenediamine and 0.005 weight portion chelating agent.
In the preparation method of the above-mentioned salt-resistant polymer of the present invention, use disodiumedetate as chelating agent；
The redox initiator used is the compositions of Ammonium persulfate., sodium sulfite and tetramethylethylenediamine, in order to cause third
The polymerization of the monomers such as acrylamide, sodium acrylate, itaconic acid.
Unless otherwise prescribed and/or explanation, the numerical value of related to amounts of components is weight portion.
The oil deposit deep part fluid diversion chemical agent of resistance to high salinity that the present invention provides has certain gel strength, plastic
Time is controlled, and possesses certain high temperature resistant saline-alkaline tolerance.The oil deposit deep part fluid diversion chemical agent that the present invention provides
Have the beneficial effect that the following aspects:
What the oil deposit deep part fluid diversion chemical agent of the resistance to high salinity that the present invention provides used salt-resistant polymer is at height
Salinity saline (10wt%NaCl+0.7wt%CaCl2+ 0.3wt%MgCl2Dissolution velocity in) fast (< 60min),
Oil deposit deep part fluid diversion chemical agent is made to have high resistance to salinity；
After the oil deposit deep part fluid diversion chemical agent plastic of the resistance to high salinity that the present invention provides, gel apparent viscosity reaches
2.5×104MPa s, gelation time 10h-24h；
Compared with common organogel diversion agent, the oil deposit deep part fluid diversion chemistry of the resistance to high salinity that the present invention provides
Agent in high-salinity brine thermal stability be improved significantly；
The preparation method of the oil deposit deep part fluid diversion chemical agent of the resistance to high salinity that the present invention provides is simple.
Detailed description of the invention
In order to the technical characteristic of the present invention, purpose and beneficial effect are more clearly understood from, the existing skill to the present invention
Art scheme carries out described further below, but it is not intended that to the present invention can the restriction of practical range.
The instrument of test gel viscosity includes: Brookfield DV-III rotating cylinder viscometer, No. 64 rotors, shear rate
7.34s-1。
As a example by high-salinity brine, the salt-resistant polymer of the oil deposit deep part fluid diversion chemical agent of resistance to high salinity dissolves
< 60min, gel viscosity is 1.2 × 10 for speed needs4mPa·s-2.5×104MPa s, gelation time at 12h-24h,
Disclosure satisfy that site operation requirement.
Embodiment 1
Present embodiments provide the oil deposit deep part fluid diversion chemical agent of a kind of resistance to high salinity, itself through the following steps that
Prepare:
The preparation of salt-resistant polymer: at 12 DEG C, tool plug wide mouthed bottle in be sequentially added into 79.6 parts by weight of deionized water,
15 parts by weight propylene amide, 3 weight portion sodium itaconates, 2 weight portion 2-acrylamido-2-myristyl ethyl sulfonic acid sodium,
0.005 parts by wt EDTA-disodium, is passed through nitrogen 15 minutes, be subsequently adding 0.1 weight portion Ammonium persulfate.,
0.05 parts by weight sodium sulfite and 0.2 weight portion tetramethylethylenediamine, continue to be passed through nitrogen sealing in 5 minutes, wait poly-
Close pelletize after reaction completes, be dried and sub-sieve, obtain salt-resistant polymer.
The preparation of the oil deposit deep part fluid diversion chemical agent of resistance to high salinity: be sequentially added into 99.1 weight portions in beaker
High-salinity brine (10wt%NaCl+0.7wt%CaCl2+ 0.3wt%MgCl2), 0.4 weight portion salt-resistant polymer,
0.3 parts by weight of phenolic resin, 0.2 weight portion stabilizer (thiourea: hydroquinone=1:1 or 1:2), stir
After, load 10 50mL rustless steel ageing cans and be statically placed in and mix up in temperature (105 DEG C) drying baker, preparing resistance to height
The oil deposit deep part fluid diversion chemical agent of salinity.
The dissolubility of above-mentioned salt-resistant polymer
Equipped with 100 grams of high-salinity brine (10wt%NaCl+0.7wt%CaCl2+ 0.3wt%MgCl2) in beaker
Adding 0.4 gram of above-mentioned salt-resistant polymer, after stirring, the time that is completely dissolved of salt-resistant polymer is 45min.
The thermal stability of the oil deposit deep part fluid diversion chemical agent of above-mentioned resistance to high salinity
Take out the gel sample in thermostatic drying chamber and observe plastic situation, experiment find 23 hours after the present embodiment resistance to
The oil deposit deep part preliminary plastic of fluid diversion chemical agent of high salinity, the apparent viscosity recorded is 12000mPa s.Warp
Cross continuous 3 selenothermy study on the stability, its gel viscosity retention rate (aging rear apparent viscosity with initially become apparent gluing
The ratio of degree difference and initial plastic apparent viscosity) be respectively as follows: 90.1% (thiourea: hydroquinone=1:1), 93%
(thiourea: hydroquinone=1:2), 84.5% (thiourea: hydroquinone=1:1), 87% (thiourea: hydroquinone
=1:2) and 76% (thiourea: hydroquinone=1:1), 80% (thiourea: hydroquinone=1:2), show relatively
Good thermal stability, and in stabilizer, hydroquinone content is the highest, gel viscosity retention rate is the biggest.
The sealing characteristics of the oil deposit deep part fluid diversion chemical agent of above-mentioned resistance to high salinity
The quartz sand of 80-120 mesh is filled in the fill out sand tube of diameter 2.5cm, length 60cm, by the present embodiment
The oil deposit deep part fluid diversion chemical agent of resistance to high salinity and organogel diversion agent are injected separately into and are filled with same particle size
In the basket of quartz sand, basket two ends are sealed, is placed in constant temperature 72 hours in 105 DEG C of thermostatic drying chambers, makes
Its plastic, then injects water and carries out displacement test, investigate the resistance to erosion shut-off capacity of diversion agent further, the results are shown in Table
In 1.
Table 1 turns to the sealing characteristics of chemical agent
Note: organogel diversion agent is by the oil deposit deep part fluid diversion chemical agent etc. with the resistance to high salinity of the present embodiment
The general polymer of mass fraction, cross-linking agent are formulated with heat stabilizer.Wherein, stabilizer thiourea and hydroquinone
Proportioning is 1:2.
From in table 1, the oil deposit deep part fluid diversion chemical agent of the resistance to high salinity of the present embodiment, organogel turn
It is respectively 85.3%, 70.1%, the oil deposit deep part fluid diversion of the present embodiment compared with organogel to agent sealing ratiod
Learn agent shut-off capacity to significantly improve.
Embodiment 2
Present embodiments provide the oil deposit deep part fluid diversion chemical agent of a kind of resistance to high salinity, itself through the following steps that
Prepare:
The preparation of salt-resistant polymer: at 12 DEG C, tool plug wide mouthed bottle in be sequentially added into 77.5 parts by weight of deionized water,
16 parts by weight propylene amide, 2 weight portion sodium itaconates, 4 weight portion 2-acrylamido-2-myristyl ethyl sulfonic acid sodium,
0.005 parts by wt EDTA-disodium, is passed through nitrogen 15 minutes, be subsequently adding 0.15 weight portion Ammonium persulfate.,
0.05 parts by weight sodium sulfite and 0.25 weight portion tetramethylethylenediamine, continue to be passed through nitrogen sealing in 5 minutes, wait
Polyreaction complete after pelletize, be dried and sub-sieve, obtain salt-resistant polymer.
Prepared by the oil deposit deep part fluid diversion chemical agent of resistance to high salinity: be sequentially added into 98.8 weight portions in beaker high
Salinity saline (10wt%NaCl+0.7wt%CaCl2+ 0.3wt%MgCl2), 0.5 weight portion salt-resistant polymer, 0.4
Parts by weight of phenolic resin, 0.3 weight portion stabilizer (thiourea: hydroquinone=1:1 or 1:2), after stirring,
Load 10 50mL rustless steel ageing cans and be statically placed in and mix up in temperature (105 DEG C) drying baker, preparing resistance to high mineralization
The oil deposit deep part fluid diversion chemical agent of degree.
The dissolubility of above-mentioned salt-resistant polymer
Equipped with 100 grams of high-salinity brine (10wt%NaCl+0.7wt%CaCl2+ 0.3wt%MgCl2) in beaker
Adding 0.5 gram of above-mentioned salt-resistant polymer, the time that after stirring, salt-resistant polymer is completely dissolved is 55min.
The thermal stability of the oil deposit deep part fluid diversion chemical agent of above-mentioned resistance to high salinity
Take out the gel sample in thermostatic drying chamber and observe plastic situation, experiment find 20 hours after the present embodiment upper
State the oil deposit deep part preliminary plastic of fluid diversion chemical agent of resistance to high salinity, the apparent viscosity recorded is 2.1 ×
104mPa·s.Hereafter through continuous 3 selenothermy study on the stability, its gel viscosity retention rate is respectively as follows: 92% (sulfur
Urea: hydroquinone=1:1), 95.2% (thiourea: hydroquinone=1:2), 85.3% (thiourea: hydroquinone=1:
1), 90.5% (thiourea: hydroquinone=1:2) with, 82% (thiourea: hydroquinone=1:1), 88.1% (sulfur
Urea: hydroquinone=1:2), show preferable thermal stability, and in stabilizer, hydroquinone content is the highest, solidifying
Adhesiveness retention rate is the biggest.
The sealing characteristics of the oil deposit deep part fluid diversion chemical agent of above-mentioned resistance to high salinity
The quartz sand of 80-120 mesh is filled in the fill out sand tube of diameter 2.5cm, length 60cm, by the present embodiment
The oil deposit deep part fluid diversion chemical agent of resistance to high salinity and organogel diversion agent are injected separately into and are filled with same particle size
In the basket of quartz sand, basket two ends are sealed, is placed in constant temperature 72 hours in 105 DEG C of thermostatic drying chambers, makes
Its plastic, then injects water and carries out displacement test, investigate the resistance to erosion shut-off capacity of diversion agent further, the results are shown in Table
In 2.
Table 2 turns to the sealing characteristics of chemical agent
Note: organogel diversion agent is by the oil deposit deep part fluid diversion chemical agent etc. with the resistance to high salinity of the present embodiment
The general polymer of mass fraction, cross-linking agent are formulated with heat stabilizer.Wherein, stabilizer thiourea and hydroquinone
Proportioning is 1:2.
From in table 2, the oil deposit deep part fluid diversion chemical agent of the resistance to high salinity of the present embodiment, organogel turn
Being respectively 95.3%, 80.6% to agent sealing ratiod, the oil reservoir of the resistance to high salinity of the present embodiment is deep compared with organogel
The shut-off capacity of portion's fluid diversion chemical agent significantly improves.
Embodiment 3
Present embodiments provide the oil deposit deep part fluid diversion chemical agent of a kind of resistance to high salinity, itself through the following steps that
Prepare:
The preparation of salt-resistant polymer: at 12 DEG C, tool plug wide mouthed bottle in be sequentially added into 77.4 parts by weight of deionized water,
16 parts by weight propylene amide, 4 weight portion sodium itaconates, 2 weight portion 2-acrylamido-2-myristyl ethyl sulfonic acid sodium,
0.005 parts by wt EDTA-disodium, is passed through nitrogen 15 minutes, be subsequently adding 0.20 weight portion Ammonium persulfate.,
0.10 parts by weight sodium sulfite and 0.25 weight portion tetramethylethylenediamine, continue to be passed through nitrogen sealing in 5 minutes, wait
Polyreaction complete after pelletize, be dried and sub-sieve, obtain salt-resistant polymer.
Prepared by the oil deposit deep part fluid diversion chemical agent of resistance to high salinity: be sequentially added into 98.9 weight portions in beaker high
Salinity saline (10wt%NaCl+0.7wt%CaCl2+ 0.3wt%MgCl2), 0.5 weight portion salt-resistant polymer, 0.3
Part phenolic resin, 0.3 weight portion stabilizer (thiourea: hydroquinone=1:1 or 1:2), after stirring, load
10 50mL rustless steel ageing cans are also statically placed in and mix up in temperature (105 DEG C) drying baker, prepare resistance to high salinity
Oil deposit deep part fluid diversion chemical agent.
The dissolubility of above-mentioned salt-resistant polymer
Equipped with 100 grams of high-salinity brine (10wt%NaCl+0.7wt%CaCl2+ 0.3wt%MgCl2) in beaker
Adding 0.5 gram of above-mentioned salt-resistant polymer, the time that after stirring, salt-resistant polymer is completely dissolved is 50min.
The thermal stability of the oil deposit deep part fluid diversion chemical agent of above-mentioned resistance to high salinity
Take out the gel sample in thermostatic drying chamber and observe plastic situation, experiment find 19 hours after the present embodiment resistance to
The oil deposit deep part preliminary plastic of fluid diversion chemical agent of high salinity, the apparent viscosity recorded is 1.84 × 104mPa·s。
Hereafter through continuous 3 selenothermy study on the stability, its gel viscosity retention rate is respectively as follows: 90.1% (thiourea: to benzene
Diphenol=1:1), 92.4% (thiourea: hydroquinone=1:2), 85.1% (thiourea: hydroquinone=1:1), 88.2%
(thiourea: hydroquinone=1:2), 76.5% (thiourea: hydroquinone=1:1), 82.3% (thiourea: to benzene two
Phenol=1:2), show preferable thermal stability, and in stabilizer, hydroquinone content is the highest, gel viscosity retains
Rate is the biggest.
The sealing characteristics of the oil deposit deep part fluid diversion chemical agent of above-mentioned resistance to high salinity
The quartz sand of 80-120 mesh is filled in the fill out sand tube of diameter 2.5cm, length 60cm, by the present embodiment
The oil deposit deep part fluid diversion chemical agent of resistance to high salinity and organogel diversion agent are injected separately into and are filled with same particle size
In the basket of quartz sand, basket two ends are sealed, is placed in constant temperature 72 hours in 105 DEG C of thermostatic drying chambers, makes
Its plastic, then injects water and carries out displacement test, investigate the resistance to erosion shut-off capacity of diversion agent further, the results are shown in Table
In 3.
Table 3 turns to the sealing characteristics of chemical agent
Note: organogel diversion agent is by the oil deposit deep part fluid diversion chemical agent etc. with the resistance to high salinity of the present embodiment
The general polymer of mass fraction, cross-linking agent are formulated with heat stabilizer.Wherein, stabilizer thiourea and hydroquinone
Proportioning is 1:2.
From in table 3, the oil deposit deep part fluid diversion chemical agent of the resistance to high salinity of the present embodiment, organogel turn
Being respectively 93.5%, 81.1% to agent sealing ratiod, the oil reservoir of the resistance to high salinity of the present embodiment is deep compared with organogel
The shut-off capacity of portion's fluid diversion chemical agent significantly improves.
Embodiment 4
Present embodiments provide the oil deposit deep part fluid diversion chemical agent of a kind of resistance to high salinity, itself through the following steps that
Prepare:
The preparation of salt-resistant polymer: at 12 DEG C, tool plug wide mouthed bottle in be sequentially added into 77.5 parts by weight of deionized water,
15 parts by weight propylene amide, 3 weight portion sodium itaconates, 4 weight portion 2-acrylamido-2-myristyl ethyl sulfonic acid sodium,
0.005 parts by wt EDTA-disodium, is passed through nitrogen 15 minutes, be subsequently adding 0.15 weight portion Ammonium persulfate.,
0.10 parts by weight sodium sulfite and 0.20 weight portion tetramethylethylenediamine, continue to be passed through nitrogen sealing in 5 minutes, wait
Polyreaction complete after pelletize, be dried and sub-sieve, obtain salt-resistant polymer.
Prepared by the oil deposit deep part fluid diversion chemical agent of resistance to high salinity: be sequentially added into 98.8 weight portions in beaker high
Salinity saline (10wt%NaCl+0.7wt%CaCl2+ 0.3wt%MgCl2), 0.6 weight portion salt-resistant polymer, 0.5
Parts by weight of phenolic resin, 0.4 weight portion stabilizer (thiourea: hydroquinone=1:1 or 1:2), after stirring,
Load 10 50mL rustless steel ageing cans and be statically placed in and mix up in temperature (105 DEG C) drying baker, preparing resistance to high mineralization
The oil deposit deep part fluid diversion chemical agent of degree.
The dissolubility of above-mentioned salt-resistant polymer
Equipped with 100 grams of high-salinity brine (10wt%NaCl+0.7wt%CaCl2+ 0.3wt%MgCl2) in beaker
Adding 0.6 gram of above-mentioned salt-resistant polymer, after stirring, salt-resistant polymer is completely dissolved the time is 50min.
The thermal stability of the oil deposit deep part fluid diversion chemical agent of above-mentioned resistance to high salinity
Take out the gel sample in thermostatic drying chamber and observe plastic situation, experiment find 12 hours after the present embodiment resistance to
The oil deposit deep part preliminary plastic of fluid diversion chemical agent of high salinity, the apparent viscosity recorded is 2.50 × 104mPa·s。
Hereafter through continuous 3 selenothermy study on the stability, its gel viscosity retention rate is respectively as follows: 95.6% (thiourea: to benzene
Diphenol=1:1), 98.5% (thiourea: hydroquinone=1:2), 89.6% (thiourea: hydroquinone=1:1), 93.3%
(thiourea: hydroquinone=1:2), 87.2% (thiourea: hydroquinone=1:1), 89.6% (thiourea: to benzene two
Phenol=1:2), show preferable thermal stability, and in stabilizer, hydroquinone content is the highest, gel viscosity is protected
Stay rate the biggest.
The sealing characteristics of the oil deposit deep part fluid diversion chemical agent of above-mentioned resistance to high salinity
The quartz sand of 80-120 mesh is filled in the fill out sand tube of diameter 2.5cm, length 60cm, by the present embodiment
The oil deposit deep part fluid diversion chemical agent of resistance to high salinity and organogel diversion agent are injected separately into and are filled with same particle size
In the basket of quartz sand, basket two ends are sealed, is placed in constant temperature 72 hours in 105 DEG C of thermostatic drying chambers, makes
Its plastic, then injects water and carries out displacement test, investigate the resistance to erosion shut-off capacity of diversion agent further, the results are shown in Table
In 4.
Table 4 turns to the sealing characteristics of chemical agent
Note: organogel diversion agent is by the oil deposit deep part fluid diversion chemical agent etc. with the resistance to high salinity of the present embodiment
The general polymer of mass fraction, cross-linking agent are formulated with heat stabilizer.Wherein, stabilizer thiourea and hydroquinone
Proportioning is 1:2.
From in table 4, the oil deposit deep part fluid diversion chemical agent of the resistance to high salinity of the present embodiment, organogel turn
Being respectively 98.5%, 84.2% to agent sealing ratiod, the oil reservoir of the resistance to high salinity of the present embodiment is deep compared with organogel
The shut-off capacity of portion's fluid diversion chemical agent significantly improves.
Above example shows, the oil deposit deep part fluid diversion chemical agent of the resistance to high salinity of the present invention is capable of withstanding high mineralization
Degree, gelation time are controlled, become adhesiveness high, it is possible to achieve deep rock tunneling, effectively block high permeability zone, reach
Closure high salinity reservoirs high permeability zone purpose.
Claims (10)
1. the oil deposit deep part fluid diversion chemical agent of a resistance to high salinity, it is characterised in that with this resistance to high salinity
The gross weight of oil deposit deep part fluid diversion chemical agent be 100 weight portion meters, the oil deposit deep part liquid stream of this resistance to high salinity
The raw material composition turning to chemical agent includes the salt-resistant polymer of 0.4 weight portion-0.6 weight portion, 0.3 weight portion-0.5 weight
Cross-linking agent, the stabilizer of 0.2 weight portion-0.4 weight portion and the concentrated water of surplus of part.
The oil deposit deep part fluid diversion chemical agent of resistance to high salinity the most according to claim 1, it is characterised in that
Described salt-resistant polymer is by acrylamide, sodium acrylate, Sodium styrene sulfonate, sodium itaconate and 2-acrylamido
The copolymer of two or more the material composition in-2-myristyl ethyl sulfonic acid sodium, described copolymer relative
Molecular weight is 6,000,000-1,000 ten thousand.
The oil deposit deep part fluid diversion chemical agent of resistance to high salinity the most according to claim 2, it is characterised in that
Described salt-resistant polymer is to be formed by acrylamide, sodium itaconate and 2-acrylamido-2-dodecyl ethyl sulfonic acid sodium
Copolymer.
The oil deposit deep part fluid diversion chemical agent of resistance to high salinity the most according to claim 1, it is characterised in that
Described cross-linking agent includes the combination of one or more in phenolic resin, glutaraldehyde and Biformyl；Preferably, described friendship
Connection agent includes phenolic resin.
The oil deposit deep part fluid diversion chemical agent of resistance to high salinity the most according to claim 1, it is characterised in that
Described stabilizer includes the combination of one or more in thiourea, hydroquinone, sodium thiosulfate and sodium sulfite；Excellent
Selection of land, described stabilizer includes thiourea and the compositions of hydroquinone formation that mass ratio is 1:1 or 1:2.
The oil deposit deep part fluid diversion chemical agent of resistance to high salinity the most according to claim 1, it is characterised in that
Described concentrated water is by 10%wtNaCl, 0.7wt%CaCl2, 0.3wt%MgCl2Form with the water of surplus, wherein,
The total mass fraction of described concentrated water is 100wt%.
7. according to the oil deposit deep part fluid diversion chemical agent of the resistance to high salinity described in any one of claim 1-6, its
Being characterised by, the gel apparent viscosity after the oil deposit deep part fluid diversion chemical agent plastic of this resistance to high salinity is
2.5×104MPa s, gelation time is 10h-24h.
8. the application of the oil deposit deep part fluid diversion chemical agent of the resistance to high salinity described in any one of claim 1-7,
It is characterized in that, the oil deposit deep part fluid diversion chemical agent of this resistance to high salinity be applied to salinity be 1.0 ×
104mg/L-1.5×105The profile control and water plugging of mg/L oil reservoir.
9. the preparation side of the oil deposit deep part fluid diversion chemical agent of the resistance to high salinity described in any one of claim 1-7
Method, it is characterised in that this preparation method comprises the following steps:
In described concentrated water, it is sequentially added into described salt-resistant polymer, cross-linking agent and stabilizer, stirs under room temperature,
Prepare the oil deposit deep part fluid diversion chemical agent of described resistance to high salinity.
The preparation method of the oil deposit deep part fluid diversion chemical agent of resistance to high salinity the most according to claim 9,
It is characterized in that, described salt-resistant polymer is prepared according to following steps:
At 10 DEG C-12 DEG C, the raw material composition adding described salt-resistant polymer in water obtains polymeric solution, molten to polymerization
Liquid adds chelating agent, is passed through nitrogen 10min-15min, add Ammonium persulfate., sodium sulfite and tetramethylethylenediamine,
Continue to be passed through nitrogen 5min, carry out pelletize, be dried and cross 60 mesh mesh screens carry out sub-sieve, obtain described salt-resistant polymer,
Wherein, the described polymeric solution of every 100 weight portions adds 0.1 weight portion-0.2 weight portion Ammonium persulfate., 0.05 weight
Amount part-0.1 parts by weight sodium sulfite, 0.2 weight portion-0.25 weight portion tetramethylethylenediamine and 0.005 weight portion complexation
Agent.
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| CN105820804B (en) | 2018-09-04 |
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