CN104212422B - Heavy oil low cost modified clay-type water shutoff agent and usage method thereof - Google Patents
Heavy oil low cost modified clay-type water shutoff agent and usage method thereof Download PDFInfo
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- CN104212422B CN104212422B CN201410388187.7A CN201410388187A CN104212422B CN 104212422 B CN104212422 B CN 104212422B CN 201410388187 A CN201410388187 A CN 201410388187A CN 104212422 B CN104212422 B CN 104212422B
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- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 99
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 title claims abstract description 11
- 239000000295 fuel oil Substances 0.000 title abstract 2
- 239000004568 cement Substances 0.000 claims abstract description 25
- ONCZQWJXONKSMM-UHFFFAOYSA-N dialuminum;disodium;oxygen(2-);silicon(4+);hydrate Chemical compound O.[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[Na+].[Na+].[Al+3].[Al+3].[Si+4].[Si+4].[Si+4].[Si+4] ONCZQWJXONKSMM-UHFFFAOYSA-N 0.000 claims abstract description 24
- 229940080314 sodium bentonite Drugs 0.000 claims abstract description 24
- 229910000280 sodium bentonite Inorganic materials 0.000 claims abstract description 24
- 239000003129 oil well Substances 0.000 claims abstract description 22
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229920002401 polyacrylamide Polymers 0.000 claims abstract description 17
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims abstract description 14
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims abstract description 13
- 238000002347 injection Methods 0.000 claims abstract description 12
- 239000007924 injection Substances 0.000 claims abstract description 12
- 238000005728 strengthening Methods 0.000 claims abstract description 11
- -1 sodium alkyl sulfonate Chemical class 0.000 claims abstract description 8
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical class [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000004115 Sodium Silicate Substances 0.000 claims abstract description 7
- 239000000654 additive Substances 0.000 claims abstract description 7
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910001870 ammonium persulfate Inorganic materials 0.000 claims abstract description 7
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000000292 calcium oxide Substances 0.000 claims abstract description 7
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000011734 sodium Substances 0.000 claims abstract description 7
- 229910052708 sodium Inorganic materials 0.000 claims abstract description 7
- 229910001388 sodium aluminate Inorganic materials 0.000 claims abstract description 7
- 229910000029 sodium carbonate Inorganic materials 0.000 claims abstract description 7
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052911 sodium silicate Inorganic materials 0.000 claims abstract description 7
- 229910052938 sodium sulfate Inorganic materials 0.000 claims abstract description 7
- 235000011152 sodium sulphate Nutrition 0.000 claims abstract description 7
- 230000000996 additive effect Effects 0.000 claims abstract description 6
- 239000002981 blocking agent Substances 0.000 claims description 23
- 238000003756 stirring Methods 0.000 claims description 12
- 239000004927 clay Substances 0.000 claims description 10
- 239000000084 colloidal system Substances 0.000 claims description 9
- 239000002002 slurry Substances 0.000 claims description 8
- 239000000377 silicon dioxide Substances 0.000 claims description 6
- 235000019795 sodium metasilicate Nutrition 0.000 claims description 6
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 claims description 5
- 125000000129 anionic group Chemical group 0.000 claims description 3
- 230000007062 hydrolysis Effects 0.000 claims description 3
- 238000006460 hydrolysis reaction Methods 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 229940031098 ethanolamine Drugs 0.000 claims 1
- 238000007789 sealing Methods 0.000 abstract description 5
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 abstract description 3
- 239000003921 oil Substances 0.000 abstract 1
- 229910052814 silicon oxide Inorganic materials 0.000 abstract 1
- 230000009545 invasion Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000035699 permeability Effects 0.000 description 4
- 239000004576 sand Substances 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical group [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 2
- 229940092782 bentonite Drugs 0.000 description 2
- 229910000278 bentonite Inorganic materials 0.000 description 2
- 239000000440 bentonite Substances 0.000 description 2
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000003306 harvesting Methods 0.000 description 2
- 238000005342 ion exchange Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 150000001412 amines Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229920005551 calcium lignosulfonate Polymers 0.000 description 1
- RYAGRZNBULDMBW-UHFFFAOYSA-L calcium;3-(2-hydroxy-3-methoxyphenyl)-2-[2-methoxy-4-(3-sulfonatopropyl)phenoxy]propane-1-sulfonate Chemical compound [Ca+2].COC1=CC=CC(CC(CS([O-])(=O)=O)OC=2C(=CC(CCCS([O-])(=O)=O)=CC=2)OC)=C1O RYAGRZNBULDMBW-UHFFFAOYSA-L 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 239000010954 inorganic particle Substances 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 229910052901 montmorillonite Inorganic materials 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
Classifications
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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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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to a heavy oil low cost modified clay-type water shutoff agent and a usage method thereof. The agent is prepared from the following components by weight: a main agent comprising 10-15% of sodium bentonite, 0.1-0.2% of polyacrylamide and 5-10% of ultrafine oil well cement; and an external additive comprising 0.3%-0.45% of an agent A, 2% of an agent B, 2% of an agent C, and the balance of water. The agent A comprises 30% of sodium carbonate, 20% of sodium alkyl sulfonate and 50% of sulfonated phenolic resin; the agent B comprises 80% of sodium silicate, 10% of triethanolamine and 10% of ammonium persulfate; and the agent C comprises 60% of sodium aluminate, 25% of sodium sulfate, 10% silicon oxide and 5% of calcium oxide. The water shutoff agent provided by the invention employs a three-segment plug-type injection method comprising an early strength segment slug, a colloidal segment slug and a strengthening segment slug, which are injected sequentially. The water shutoff agent has the characteristics of realization of low cost, high dose, multi-segment slug and low density oil reservoir deep plugging, and good injection performance and sealing performance.
Description
Technical field
The present invention relates to a kind of viscous crude field blocks water shutoff material and the method for water enchroachment (invasion) macropore, particularly to a kind of viscous crude
Low-cost modified clay class water shutoff agent and using method.
Background technology
, easily there is water enchroachment (invasion) phenomenon in the middle and later periods of steam soak exploitation in the heavy crude reservoir being controlled by edge-bottom water, once viscous crude
After oil reservoir water breakthrough, normal exploitation will be difficult to maintain.Viscous crude water enchroachment (invasion) passage is often relevant with steam zone in thermal process, past
Toward being more easy to water breakthrough at the high position of recovery percent of reserves, simultaneously also relevant with viscosity of thickened oil, the water enchroachment (invasion) passage of the higher formation of viscosity of thickened oil
Narrower.The slurry density of existing viscous crude inorganic particle type blocking agent injection at present is higher, plugging strength is high, but its migration distance is relatively
Closely, easily there is near wellbore zone blocking；And organic chemical blocking agent such as frozen glue, gel-like blocking agent, injection is good, but underground envelope
Stifled bad adaptability, plugging strength low effective time is short it is often more important that the chemical machine material price of heatproof is high it is impossible to satisfaction is heavy dose of
Injection requires.
The general inorganic blocking agent such as grain-type water shutoff agent such as clay, calcium lignosulfonate, flyash, cement has plugging strength height, adaptability
Strong the features such as, relatively it is suitable for the needs of heavy crude reservoir middle and later periods macropore closure, but general inorganic blocking agent is susceptible to nearly well ground
Band blocking is it is impossible to the heavy dose of injection of satisfaction and depth water blockoff require.Although organic blocking agent blocking agent injection is good, its closure adapts to
The poor, shut-off capacity of property and intensity are weaker, and prior organic blocking agent heat resistance is poor, and the organic chemistry material price mistake of heatproof
Height is it is impossible to meet the requirement of heavy crude reservoir water blockoff.
Content of the invention
The purpose of the present invention is aiming at the drawbacks described above of prior art presence, provides one kind to adopt inorganic materials,
With low cost, low-density, achievable heavy dose deep water blockoff, the higher viscous crude of plugging strength low-cost modified clay class water shutoff agent
And using method.
A kind of low-cost modified clay class water shutoff agent of viscous crude, is made up of the component of following weight portion：
Host is sodium bentonite 10 15%, polyacrylamide 0.1 0.2%, ultra-fine oil-well cement 5 10%, adds outward
Plus agent is A agent 0.3%-0.45%, B agent 2%, C agent 2%, remaining is prepared for clear water；
Wherein, described A agent is sodium carbonate 30%, sodium alkyl sulfonate 20%, sulfonated phenol formaldehyde resin 50%；B agent is sodium metasilicate
80%th, triethanolamine 10%, ammonium persulfate 10%；C agent is sodium aluminate 60%, sodium sulphate 25%, silica 10%, calcium oxide 5%；
Under normal temperature condition, sodium bentonite is added to the water after stirring 20 minutes, then external additive is slowly added in water stir
Mix, be eventually adding polyacrylamide and ultra-fine oil-well cement, be sufficiently stirred for being made into the inorganic deep water blocking agent of viscous crude, water shutoff agent
Slurry density：1.20-1.35g/cm3.
The molecular weight of above-mentioned polyacrylamide is 600～9,000,000, and degree of hydrolysis is 15～30%, anionic.
Above-mentioned ultra-fine oil-well cement is 450 mesh G level oil well superfine cements, median particle size D50≤10um.
A kind of using method of viscous crude low-cost modified clay class water shutoff agent that the present invention mentions, the injection order of water shutoff agent
Early strong slug, colloid slug, strengthening slug successively, following component count by weight percentage,
Wherein,（1）Early strong slug：Sodium bentonite 10%, ultra-fine oil-well cement 5%, A agent 0.3%, B agent 2%, C agent 2%,
Remaining is prepared for clear water；
（2）Colloid slug：Sodium bentonite 10%, polyacrylamide 0.1%, A agent 0.3%, B agent 2%, C agent 2%, remaining is
Clear water is prepared；
（3）Strengthening slug：Sodium bentonite 15%, ultra-fine oil-well cement 10%, A agent 0.45%, B agent 2%, C agent 2%, its
Remaining for clear water preparation；
Described A agent is sodium carbonate 30%, sodium alkyl sulfonate 20%, sulfonated phenol formaldehyde resin 50%；B agent is sodium metasilicate 80%, three
Monoethanolamine 10%, ammonium persulfate 10%；C agent is sodium aluminate 60%, sodium sulphate 25%, silica 10%, calcium oxide 5%.
The invention has the beneficial effects as follows：Using strong slug of preposition morning, first occupy passage and there is some strength, for subsequently blocking up
Agent is resident to provide protection.Strengthening slug plugging strength is higher, improves the sealing effect of blocking agent；
Its microcosmic feature is：One is in sodium bentonite+cement solidification slurries, by ion exchange, pellet effect
Form the Seed harvest with hyrate as skeleton with pozzolanic reaction；Two is with bentonite+polyacrylamide（HPAM）Utilize in slurries
The additive such as resin and silicate forms cancellated disorderly solidifying body, and the combination using two kinds of different blocking agent systems is formed to oil reservoir
Effective closure of macropore.
Specific embodiment
A kind of viscous crude low-cost modified clay class water shutoff agent that the present invention mentions, is made up of the component of following weight portion：
Host is sodium bentonite 10 15%, polyacrylamide 0.1 0.2%, ultra-fine oil-well cement 5 10%, adds outward
Plus agent is A agent 0.3%-0.45%, B agent 2%, C agent 2%, remaining is prepared for clear water；
Wherein, described A agent is sodium carbonate 30%, sodium alkyl sulfonate 20%, sulfonated phenol formaldehyde resin 50%；B agent is sodium metasilicate
80%th, triethanolamine 10%, ammonium persulfate 10%；C agent is sodium aluminate 60%, sodium sulphate 25%, silica 10%, calcium oxide 5%；
Under normal temperature condition, sodium bentonite is added to the water after stirring 20 minutes, then external additive is slowly added in water stir
Mix, be eventually adding polyacrylamide and ultra-fine oil-well cement, be sufficiently stirred for being made into the inorganic deep water blocking agent of viscous crude, water shutoff agent
Slurry density：1.20-1.35g/cm3.
The molecular weight of above-mentioned polyacrylamide is 600～9,000,000, and degree of hydrolysis is 15～30%, anionic.
Above-mentioned ultra-fine oil-well cement is 450 mesh G level oil well superfine cements, median particle size D50≤10um.
Sodium bentonite is to be divided according to montmorillonite the exchangeable cationic type between layer species, content：Alkaline coefficient be more than or
Equal to 1 for sodium bentonite.
A kind of using method of viscous crude low-cost modified clay class water shutoff agent that the present invention mentions, the injection order of water shutoff agent
Early strong slug, colloid slug, strengthening slug successively, following component count by weight percentage,
Wherein,（1）Early strong slug：Sodium bentonite 10%, ultra-fine oil-well cement 5%, A agent 0.3%, B agent 2%, C agent 2%,
Remaining is prepared for clear water；
（2）Colloid slug：Sodium bentonite 10%, polyacrylamide 0.1%, A agent 0.3%, B agent 2%, C agent 2%, remaining is
Clear water is prepared；
（3）Strengthening slug：Sodium bentonite 15%, ultra-fine oil-well cement 10%, A agent 0.45%, B agent 2%, C agent 2%, its
Remaining for clear water preparation；
Described A agent is sodium carbonate 30%, sodium alkyl sulfonate 20%, sulfonated phenol formaldehyde resin 50%；B agent is sodium metasilicate 80%, three
Monoethanolamine 10%, ammonium persulfate 10%；C agent is sodium aluminate 60%, sodium sulphate 25%, silica 10%, calcium oxide 5%.
Host is sodium bentonite 10 15%, polyacrylamide 0.1 0.2%, ultra-fine oil-well cement 5 10%, adds outward
Plus agent is A agent 0.3%-0.45%, B agent 2%, C agent 2%, remaining is prepared for clear water；
Embodiment 1：
Under the conditions of 20 DEG C of normal temperature, by 800kg sodium bentonite（200 mesh）It is added to 8m with 24kg A agent3In water fully
Stirring 20 minutes, then weigh stirring in the B agent of 140kg and the C agent addition mixed liquor of 140kg respectively, it is eventually adding 400kg450
Mesh G level oil-well cement obtains early strong slug blocking agent after being sufficiently stirred for.
Under the conditions of 20 DEG C of normal temperature, by 800kg sodium bentonite（200 mesh）It is added to 8m with 24kg A agent3In water fully
Stirring 20 minutes, then weigh stirring in the B agent of 140kg and the C agent addition mixed liquor of 140kg, it is eventually adding 8kg polyacrylamide
Amine（HPAM）Colloid slug blocking agent is obtained after being sufficiently stirred for 30 minutes.
Under the conditions of 20 DEG C of normal temperature, by 1200kg sodium bentonite（200 mesh）It is added to 8m with 36kg A agent3In water fully
Stirring 20 minutes, then weigh stirring in the B agent of 140kg and the C agent addition mixed liquor of 140kg respectively, it is eventually adding 800kg450
Mesh G level oil-well cement is strengthened after being sufficiently stirred for slug blocking agent.
The water shutoff agent system plugging characteristics that the present invention mentions have two microcosmic features：One is in sodium bentonite+cement
In hardening slurry, the Seed harvest with hyrate as skeleton is formed by ion exchange, pellet effect and pozzolanic reaction；Two be with
Bentonite+polyacrylamide（HPAM）Form cancellated disorderly solidifying body using additives such as resin and silicate, profit in slurries
Form the effective closure to oil reservoir macropore with the combination of two kinds of different blocking agent systems.
Through the exploitation of multicycle, a large amount of viscous crude near wellbore zone is plucked out of thick oil thermal extraction, reservoir sand is washed away and degrades
Relatively serious, near wellbore zone entirety water enchroachment (invasion) duct is larger, and the effectively stifled difficulty of blocking agent is larger, therefore using preposition in slug design
Early strong slug, first occupies passage and has some strength, provides protection for follow-up blocking agent is resident.Strengthening slug plugging strength is more
Height, improves the sealing effect of blocking agent.Plugging strength is strengthening slug>Early strong slug>, injection order is early strong slug colloid section
Plug strengthening slug.
Experimental condition：Experiment uses single tube model, back-up sand pipe diameter 2.5cm, length 19.5cm.In experiment, model is inserted
Water-bath under formation temperature, measures the stifled front permeability of fill out sand tube, is then injected into certain pore volume blocking agent, constant temperature one timing is asked again
Measure the stifled rear permeability of fill out sand tube, calculate water plugging rate and residual resistance factor.
Experimental condition：Blocking agent shut-off capacity studied under the conditions of 80 DEG C by single tube model, using essentially identical three groups of condition
Model (1#, 2#, 3#) is tested.Model all injects 0.5PV, and wherein 2# divides 3 alternately injections, amounts to 0.5PV, injects blocking agent
Constant temperature 24h measures sealing ratiod afterwards.Remarks：（The early strong slug of 1#；2# colloid slug；3# strengthens slug）
| Experiment parameter | 1# | 2# | 3# |
| Pore volume (mL) | 35.2 | 37 | 34.9 |
| Permeability (um before stifled2) | 10.02 | 9.46 | 9.46 |
| Permeability (um after stifled2) | 0.45 | 0.87 | 0.0088 |
| Sealing ratiod (%) | 95.6 | 90.8 | 99.9 |
| Residual resistance factor | 422.7 | 80.9 | 1375 |
Claims (2)
1. a kind of low-cost modified clay class water shutoff agent of viscous crude, is characterized in that being made up of the component of following weight portion：
Host is sodium bentonite 10 15%, polyacrylamide 0.1 0.2%, ultra-fine oil-well cement 5 10%, external additive
For A agent 0.3%-0.45%, B agent 2%, C agent 2%, remaining is prepared for clear water；
Wherein, described A agent is sodium carbonate 30%, sodium alkyl sulfonate 20%, sulfonated phenol formaldehyde resin 50%；B agent is sodium metasilicate 80%, three
Monoethanolamine 10%, ammonium persulfate 10%；C agent is sodium aluminate 60%, sodium sulphate 25%, silica 10%, calcium oxide 5%；In normal temperature
Under the conditions of, sodium bentonite is added to the water after stirring 20 minutes, then external additive is slowly added to stirring in water, finally
Add polyacrylamide and ultra-fine oil-well cement, be sufficiently stirred for being made into the inorganic deep water blocking agent of viscous crude, the slurry of water shutoff agent
Density：1.20-1.35g/cm3；
The molecular weight of above-mentioned polyacrylamide is 600～9,000,000, and degree of hydrolysis is 15～30%, anionic；
Above-mentioned ultra-fine oil-well cement is 450 mesh G level oil well superfine cements, median particle size D50≤10um.
2. a kind of using method of the low-cost modified clay class water shutoff agent of viscous crude, is characterized in that：The injection order of water shutoff agent is successively
Early strong slug, colloid slug, strengthening slug, following component count by weight percentage,
Wherein,（1）Early strong slug：Sodium bentonite 10%, ultra-fine oil-well cement 5%, A agent 0.3%, B agent 2%, C agent 2%, remaining
Prepare for clear water；
（2）Colloid slug：Sodium bentonite 10%, polyacrylamide 0.1%, A agent 0.3%, B agent 2%, C agent 2%, remaining is clear water
Prepare；
（3）Strengthening slug：Sodium bentonite 15%, ultra-fine oil-well cement 10%, A agent 0.45%, B agent 2%, C agent 2%, remaining is
Clear water is prepared；
Described A agent is sodium carbonate 30%, sodium alkyl sulfonate 20%, sulfonated phenol formaldehyde resin 50%；B agent is sodium metasilicate 80%, three ethanol
Amine 10%, ammonium persulfate 10%；C agent is sodium aluminate 60%, sodium sulphate 25%, silica 10%, calcium oxide 5%.
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| CN105154045A (en) * | 2015-08-27 | 2015-12-16 | 山东聚鑫化工有限公司 | Viscous crude oil emulsion phase inversion profile modifying water plugging agent |
| CN105622856B (en) * | 2016-04-01 | 2018-01-30 | 中国石油化工股份有限公司 | A kind of preparation technology for positioning envelope and altering agent |
| CN112625665B (en) * | 2019-10-08 | 2023-04-18 | 中国石油化工股份有限公司 | Fly ash suspension stable plugging profile control agent and preparation method thereof |
| CN112624678B (en) * | 2021-01-22 | 2022-04-08 | 大庆石油管理局有限公司 | Oil well water shutoff agent and preparation method thereof |
| CN112552929B (en) * | 2021-02-19 | 2021-05-25 | 中铁四局集团有限公司北京分公司 | Muck improving material for earth pressure balance roof pipe in anhydrous sand layer |
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| CN101215463A (en) * | 2008-01-17 | 2008-07-09 | 中国矿业大学 | Drilling hole sealing material |
| CN101818053A (en) * | 2010-04-20 | 2010-09-01 | 刘茂平 | Composite wall-protecting well-drilling slurry material |
| CN102329600A (en) * | 2011-10-14 | 2012-01-25 | 西南石油大学 | Nanoparticle sealing channeling water shutoff agent for oil wells |
| CN102587858A (en) * | 2012-03-09 | 2012-07-18 | 中国石油化工股份有限公司 | Method for blocking water for fracture and hole type reservoir |
| CN103755275A (en) * | 2013-12-24 | 2014-04-30 | 湖南宏禹水利水电岩土工程有限公司 | Early-strength erosion-resistant clay cement paste |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US8453733B2 (en) * | 2009-07-31 | 2013-06-04 | Bradley W. Brice | Method to control driving fluid breakthrough during production of hydrocarbons from a subterranean reservoir |
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Effective date of registration: 20190114 Address after: No. 51 Jiaxiang Road, Dongying District, Dongying City, Shandong Province Patentee after: Shengli Oilfield Kangbei Petroleum Engineering & Equipment Co., Ltd. Address before: 257000 Oil Development Center, No. 89, West Liaocheng Road, Dongying District, Dongying City, Shandong Province Patentee before: Zuo Qingshan |
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