CN104927826A - Foam stabilizer for nitrogen foam combination flooding, foam composition, oil extraction method and application - Google Patents
Foam stabilizer for nitrogen foam combination flooding, foam composition, oil extraction method and application Download PDFInfo
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- CN104927826A CN104927826A CN201510312522.XA CN201510312522A CN104927826A CN 104927826 A CN104927826 A CN 104927826A CN 201510312522 A CN201510312522 A CN 201510312522A CN 104927826 A CN104927826 A CN 104927826A
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- 239000006260 foam Substances 0.000 title claims abstract description 230
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 130
- 239000003381 stabilizer Substances 0.000 title claims abstract description 102
- 239000000203 mixture Substances 0.000 title claims abstract description 78
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 65
- 238000000605 extraction Methods 0.000 title abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 32
- 235000019832 sodium triphosphate Nutrition 0.000 claims abstract description 27
- 229910052708 sodium Inorganic materials 0.000 claims abstract description 24
- 239000011734 sodium Substances 0.000 claims abstract description 24
- 238000000034 method Methods 0.000 claims abstract description 20
- 229920001817 Agar Polymers 0.000 claims abstract description 14
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000008272 agar Substances 0.000 claims abstract description 14
- WHGYBXFWUBPSRW-FOUAGVGXSA-N beta-cyclodextrin Chemical compound OC[C@H]([C@H]([C@@H]([C@H]1O)O)O[C@H]2O[C@@H]([C@@H](O[C@H]3O[C@H](CO)[C@H]([C@@H]([C@H]3O)O)O[C@H]3O[C@H](CO)[C@H]([C@@H]([C@H]3O)O)O[C@H]3O[C@H](CO)[C@H]([C@@H]([C@H]3O)O)O[C@H]3O[C@H](CO)[C@H]([C@@H]([C@H]3O)O)O3)[C@H](O)[C@H]2O)CO)O[C@@H]1O[C@H]1[C@H](O)[C@@H](O)[C@@H]3O[C@@H]1CO WHGYBXFWUBPSRW-FOUAGVGXSA-N 0.000 claims abstract description 14
- 239000001913 cellulose Substances 0.000 claims abstract description 14
- 229920002678 cellulose Polymers 0.000 claims abstract description 14
- 239000000843 powder Substances 0.000 claims abstract description 14
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims abstract description 11
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims abstract description 11
- 239000002994 raw material Substances 0.000 claims abstract description 11
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 claims abstract description 11
- 239000004711 α-olefin Substances 0.000 claims abstract description 11
- 238000001816 cooling Methods 0.000 claims abstract description 9
- 238000002156 mixing Methods 0.000 claims abstract description 8
- 238000003756 stirring Methods 0.000 claims abstract description 8
- 238000002360 preparation method Methods 0.000 claims abstract description 6
- WHGYBXFWUBPSRW-UHFFFAOYSA-N Cycloheptaamylose Natural products O1C(C(C2O)O)C(CO)OC2OC(C(C2O)O)C(CO)OC2OC(C(C2O)O)C(CO)OC2OC(C(C2O)O)C(CO)OC2OC(C(O)C2O)C(CO)OC2OC(C(C2O)O)C(CO)OC2OC2C(O)C(O)C1OC2CO WHGYBXFWUBPSRW-UHFFFAOYSA-N 0.000 claims description 13
- 101710194948 Protein phosphatase PhpP Proteins 0.000 claims description 13
- HWGNBUXHKFFFIH-UHFFFAOYSA-I pentasodium;[oxido(phosphonatooxy)phosphoryl] phosphate Chemical compound [Na+].[Na+].[Na+].[Na+].[Na+].[O-]P([O-])(=O)OP([O-])(=O)OP([O-])([O-])=O HWGNBUXHKFFFIH-UHFFFAOYSA-I 0.000 claims description 13
- UNXRWKVEANCORM-UHFFFAOYSA-I triphosphate(5-) Chemical compound [O-]P([O-])(=O)OP([O-])(=O)OP([O-])([O-])=O UNXRWKVEANCORM-UHFFFAOYSA-I 0.000 claims description 13
- 229960004418 trolamine Drugs 0.000 claims description 13
- 238000004519 manufacturing process Methods 0.000 claims description 12
- 150000001875 compounds Chemical class 0.000 claims description 11
- 239000004141 Sodium laurylsulphate Substances 0.000 claims description 10
- 238000002347 injection Methods 0.000 claims description 10
- 239000007924 injection Substances 0.000 claims description 10
- 235000019333 sodium laurylsulphate Nutrition 0.000 claims description 10
- 239000003208 petroleum Substances 0.000 claims description 4
- 230000001360 synchronised effect Effects 0.000 claims description 2
- 239000002131 composite material Substances 0.000 abstract description 9
- 238000011084 recovery Methods 0.000 abstract description 2
- 229920000858 Cyclodextrin Polymers 0.000 abstract 1
- 239000001116 FEMA 4028 Substances 0.000 abstract 1
- 235000011175 beta-cyclodextrine Nutrition 0.000 abstract 1
- 229960004853 betadex Drugs 0.000 abstract 1
- 239000003795 chemical substances by application Substances 0.000 description 29
- 230000036314 physical performance Effects 0.000 description 9
- 238000012360 testing method Methods 0.000 description 9
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000004088 foaming agent Substances 0.000 description 6
- 238000009775 high-speed stirring Methods 0.000 description 6
- 239000012488 sample solution Substances 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 239000007864 aqueous solution Substances 0.000 description 4
- 238000005187 foaming Methods 0.000 description 4
- 239000004604 Blowing Agent Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000002513 implantation Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 125000000129 anionic group Chemical group 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000011089 carbon dioxide Nutrition 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000000499 gel Substances 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 239000000126 substance Substances 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
- C09K8/58—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
- C09K8/594—Compositions used in combination with injected gas, e.g. CO2 orcarbonated gas
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/166—Injecting a gaseous medium; Injecting a gaseous medium and a liquid medium
- E21B43/168—Injecting a gaseous medium
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- Geochemistry & Mineralogy (AREA)
- Environmental & Geological Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Emulsifying, Dispersing, Foam-Producing Or Wetting Agents (AREA)
Abstract
The invention provides a foam stabilizer for nitrogen foam combination flooding, a foam composition, an oil extraction method and application. The foam stabilizer comprises the following raw materials in percentage by mass (50-65): (5-10): (2-5): (3-6): (1-5) polyanionic cellulose, agar powder, beta-cyclodextrin, sodium tripolyphosphate and triethanolamine. The foam composition comprises 0.2-0.5 wt% of alpha-olefin sodium sulfonate, 0.1-0.3 wt% of sodium dodecyl sulfate, 0.01-0.12 wt% of foam stabilizer and the balance of water. The preparation method of the foam composition comprises the following steps: mixing the raw materials, stirring at 60-90 deg.C for 20-35 min, and cooling. The oil recovery method is to inject the foam composition into the target reservoir simultaneously or alternately with nitrogen. The foam stabilizer can solve the problems of poor temperature resistance of a foam system, unstable foam and the like when nitrogen foam composite flooding is applied to a middle-deep layer bottom water fractured reservoir.
Description
Technical field
The invention belongs to the steady oily water control technique field in oil-field development field, specifically about a kind of nitrogen foam combination flooding suds-stabilizing agent and the foam composition containing it, and a kind of oil production method adopting this foam composition to carry out nitrogen foam combination flooding, application with this suds-stabilizing agent and this foam composition, is particularly useful for mid-deep strata edge-bottom water fractured reservoir.
Background technology
In oil extraction process, when edge-bottom water fractured reservoir enters the waterflooding development middle and later periods, underground is in debt serious, and surplus oil is distributed in the corner of low permeability layer and hole more, surplus oil high dispersing, Reservoir Heterogeneity is strong simultaneously, and edge-bottom water, once break through, makes oil reservoir water logging worsen and increases the weight of, High water cut inefficient well is many, inject water and progressively form water breakthrough, make injection water swept volume uneven, and then flood effectiveness is deteriorated gradually.The surplus oil finally causing the surplus oil of the hypotonic band in local, the surplus oil of interwell structure high-order bit, interlayer difference to cause the surplus oil in low-permeability layer and water taper to become can not get effectively taping the latent power.
For problems such as the surplus oil high dispersing of above-mentioned existence, conventional waterflood efficiency are low, application nitrogen foam combination flooding, carbon dioxide foaming combination flooding, air foam combination flooding all can improve fractured reservoir development effectiveness.But the use of carbonic acid gas is comparatively large by region restriction, needs sufficient carbon dioxide gas pool.Due to containing a large amount of oxygen in pressurized air, so the danger injected is larger.Use nitrogen to do source of the gas, originate sufficient and do not limit by geographical environment, injecting cost low.The elasticity of nitrogen can be large simultaneously, is more conducive to supplementary producing energy.And nitrogen is rare gas element, use also reliably safer.So nitrogen foam combination flooding technology is compared with other foam composite flooding technology, there is the advantages such as security is high, low, good in economic efficiency, the supplementary producing energy of injection cost.And suds-stabilizing agent mainly polymkeric substance conventional in current nitrogen foam combination flooding foam system, the temperature that such suds-stabilizing agent adapts to is generally within 70 DEG C, for mid-deep strata oil reservoir, temperature is general all more than 100 DEG C, the degraded of polymer class suds-stabilizing agent is very serious, and anti-shear performance when polymer class suds-stabilizing agent pumps into is poor, have a strong impact on the stability of foam system.Visible, when mid-deep strata edge-bottom water fractured reservoir application nitrogen foam combination flooding, ensure that the temperature tolerance of foam system and stability are current primary study directions, this area.
Thus, develop a kind of nitrogen foam combination flooding suds-stabilizing agent, become one of this area problem demanding prompt solution.
Summary of the invention
For solving the problems of the technologies described above, an object of the present invention is to provide a kind of nitrogen foam combination flooding suds-stabilizing agent.When this suds-stabilizing agent can solve mid-deep strata edge-bottom water fractured reservoir application nitrogen foam combination flooding, the difficult problems such as foam system temperature resistant capability difference and foam instability.
Another object of the present invention is to provide a kind of foam composition containing above-mentioned nitrogen foam combination flooding suds-stabilizing agent and preparation method thereof.
The present invention also aims to provide a kind of oil production method adopting above-mentioned foam composition to carry out nitrogen foam combination flooding.
The present invention also aims to provide the application of above-mentioned nitrogen foam combination flooding suds-stabilizing agent and/or the above-mentioned foam composition containing described nitrogen foam combination flooding suds-stabilizing agent.
For achieving the above object, the present invention provide firstly a kind of nitrogen foam combination flooding suds-stabilizing agent, its raw material composition comprises: Polyanionic Cellulose, agar powder, cycloheptaamylose, tripoly phosphate sodium STPP and trolamine, wherein, the mass ratio of described Polyanionic Cellulose, agar powder, cycloheptaamylose, tripoly phosphate sodium STPP and trolamine is (50-65): (5-10): (2-5): (3-6): (1-5).
In the present invention, above-mentioned nitrogen foam combination flooding suds-stabilizing agent can be prepared by the ordinary method of this area, such as, Polyanionic Cellulose, agar powder, cycloheptaamylose, tripoly phosphate sodium STPP and trolamine are prepared according to described mass ratio mixing.Further, described Polyanionic Cellulose, agar powder, cycloheptaamylose, tripoly phosphate sodium STPP and trolamine can be all the commercial products of this area routine.
Above-mentioned nitrogen foam combination flooding suds-stabilizing agent provided by the invention has the features such as high temperature resistant, good stability, can be applied in the nitrogen foam combination flooding of the various routine in this area, be particularly useful for the nitrogen foam combination flooding for mid-deep strata edge-bottom water fractured reservoir.
On the other hand, present invention also offers a kind of foam composition containing above-mentioned nitrogen foam combination flooding suds-stabilizing agent, in the total mass of described foam composition, its raw material composition comprises: alpha-olefin sodium sulfonate 0.2-0.5%, sodium lauryl sulphate 0.1-0.3%, described nitrogen foam combination flooding suds-stabilizing agent 0.01-0.12% and water surplus.
According to the specific embodiment of the present invention, preferably, the pH value of above-mentioned foam composition is 6-9.
Present invention also offers a kind of preparation method of the above-mentioned foam composition containing nitrogen foam combination flooding suds-stabilizing agent, it comprises the following steps: by proportionally (alpha-olefin sodium sulfonate 0.2-0.5wt%, sodium lauryl sulphate 0.1-0.3wt%, nitrogen foam combination flooding suds-stabilizing agent 0.01-0.12wt% and the water surplus) mixing of above-mentioned each raw material, 20-35 minute is stirred at 60-90 DEG C, after mixing, cooling, obtains described foam composition.
In the preparation method of above-mentioned foam composition, after preparing described foam composition, its pH value can be tested, if not in the scope of 6-9, conventional pH value regulator can be adopted to regulate its pH value.
In addition, present invention also offers a kind of oil production method adopting above-mentioned foam composition to carry out nitrogen foam combination flooding, the method comprises the following steps: described foam composition is synchronous with nitrogen and/or be alternately injected in target oil reservoir.
In above-mentioned oil production method, simultaneous implantation can be divided into: first mixed with nitrogen by foam composition and reinject afterwards; Or foam composition is injected together with nitrogen, mixes in injection process.
In above-mentioned oil production method, preferably, the volume ratio of described foam composition and underground nitrogen is 1:(2-3).
In above-mentioned oil production method, preferably, the pressure of injection is within 25MPa.
According to the specific embodiment of the present invention, preferably, above-mentioned oil production method is further comprising the steps of: envelope is altered agent and be injected in target oil reservoir.Described envelope is altered agent and can be injected together with foam composition and/or nitrogen, also can inject separately.Generally speaking, the injection timing that envelope alters agent can be determined according to hole condition, when gas well gas is altered serious, then can first inject envelope and alter agent.This envelope is altered agent and the envelope of this area routine employing can be adopted to alter agent, example gel class envelope alters agent, cement class envelope alters agent, and particulate species envelope alters the combination that agent and compound envelope to alter in agent etc. one or more, and its injection rate can carry out conventional adjustment by those skilled in the art.
Above-mentioned nitrogen foam compound petroleum driving and recovering method of the present invention is particularly useful for mid-deep strata edge-bottom water fractured reservoir, can effective displacement surplus oil.
In addition, present invention also offers above-mentioned nitrogen foam combination flooding suds-stabilizing agent and/or the above-mentioned application of foam composition in mid-deep strata edge-bottom water fractured reservoir nitrogen foam compound petroleum driving and recovering containing described nitrogen foam combination flooding suds-stabilizing agent.
In sum, nitrogen foam combination flooding suds-stabilizing agent provided by the invention has the features such as high temperature resistant, good stability, and this suds-stabilizing agent preparation method is easy simultaneously, construction technology is simple.When this suds-stabilizing agent can solve mid-deep strata edge-bottom water fractured reservoir application nitrogen foam combination flooding, the difficult problems such as foam system temperature resistant capability difference and foam instability, final solution edge-bottom water fractured reservoir enters the problems such as waterflooding development middle and later periods waterflood efficiency is low, effectively taps the latent power play an important role to surplus oil.
Accompanying drawing explanation
Fig. 1 is that foam volume in embodiment 3 and foam half bleed phase are with suds-stabilizing agent concentration curve.
Fig. 2 is that foam volume in embodiment 6 and foam half bleed phase are with suds-stabilizing agent concentration curve.
Fig. 3 is that foam volume in embodiment 9 and foam half bleed phase are with suds-stabilizing agent concentration curve.
Embodiment
In order to there be understanding clearly to technical characteristic of the present invention, object and beneficial effect, existing following detailed description is carried out to technical scheme of the present invention, but can not be interpreted as to of the present invention can the restriction of practical range.
Embodiment 1
With the foam stability energy of suds-stabilizing agent under the method mensuration normal temperature of high-speed stirring.
According to whipping agent (by mass concentration be 0.3% alpha-olefin sodium sulfonate and mass concentration be 0.2% sodium lauryl sulphate form) mass concentration is 0.5%, suds-stabilizing agent is (by Polyanionic Cellulose, agar powder, cycloheptaamylose, tripoly phosphate sodium STPP and trolamine are 55:7:3:3:2 composition according to mass ratio) mass concentration is 0.07%, be mixed with foam composition (being an aqueous solution) 1000mL, pH value is 6-9, compound method is: be mixed in proportion by each raw material, 20-35 minute is stirred at 65 DEG C, after mixing, cooling, obtain described foam composition.
Getting above-mentioned solution 200mL adjusts in device in automatically mixed, after (3000rad/min) stirs 60s at a high speed, is poured into by foam and reads lather volume in 1000mL graduated cylinder and be foam volume.After pouring foam into 1000mL graduated cylinder, start timing immediately, record foam separates out the time of 100mL water, is the foam half bleed phase simultaneously.The present embodiment uses different suds-stabilizing agent (whipping agent and concentration constant) thereof at normal temperatures, observes foam volume and the changing conditions of foam half bleed phase.Experimental result is in table 1.
Under table 1 normal temperature, various suds-stabilizing agent is on the impact of foam composition physical performance
As can be seen from foam volume, the experimental result of foam half bleed phase of table 1, after adding the composite suds-stabilizing agent of the present embodiment, blowing agent stabilizer performance is better, and this shows, nitrogen foam combination flooding suds-stabilizing agent of the present invention has higher foam stability energy.
Embodiment 2
The foam stability energy of the suds-stabilizing agent after heatproof is measured by the method for high-speed stirring.
Foam composition 300mL in Example 1 puts into high-temperature high-pressure reaction kettle or high temperature resistant steel cylinder, be placed on after sealing in pyrostal, take out after constant temperature 24h at 120 DEG C, opening kettle or high temperature resistant steel cylinder after naturally cooling to room temperature, to take out sample solution for subsequent use, getting said sample solution 200mL with graduated cylinder adjusts in device in automatically mixed, after (3000rad/min) stirs 60s at a high speed, foam is poured in 1000mL graduated cylinder and read lather volume, be the foam volume after heatproof.After pouring foam into 1000mL graduated cylinder, start timing immediately, record foam separates out the time of 100mL water, is the foam after the heatproof half bleed phase simultaneously.The present embodiment at high temperature uses different suds-stabilizing agent (whipping agent and concentration constant) thereof, observes foam volume and the changing conditions of foam half bleed phase.Experimental result is in table 2.
After table 2 heatproof, various suds-stabilizing agent is on the impact of foam composition physical performance
As can be seen from foam volume, the experimental result of foam half bleed phase of table 2, add the present embodiment composite suds-stabilizing agent and after heat, foaming agent foam volume change is not very large, the foam half bleed phase also extends to some extent, this shows, nitrogen foam combination flooding suds-stabilizing agent of the present invention is high temperature resistant, good stability.
Embodiment 3
The concentrations versus of suds-stabilizing agent.
Adopting by Polyanionic Cellulose, agar powder, cycloheptaamylose, tripoly phosphate sodium STPP and trolamine is the suds-stabilizing agent that 55:7:3:3:2 forms according to mass ratio, foam composition containing different concns suds-stabilizing agent is carried out to the test of foam volume and foam half bleed phase, test is carried out at normal temperatures, identical with embodiment 1 of testing method.Wherein, in the total mass of foam composition, the mass concentration scope of suds-stabilizing agent is 0.01%-0.12%, whipping agent (by mass concentration be 0.3% alpha-olefin sodium sulfonate and mass concentration be 0.2% sodium lauryl sulphate form) mass concentration is 0.5%, the pH value of foam composition is 6-9, the compound method of foam composition and identical in embodiment 1.Experimental result is in table 3.
Table 3 suds-stabilizing agent concentration is on the impact of foam composition physical performance
The experimental result of table 3 shows: under same density of foaming agent, and foam volume reduces with the increase of suds-stabilizing agent concentration, and the foam half bleed phase extends with the increase of concentration; When suds-stabilizing agent concentration is 0.07wt%, foaming power and the stability of whipping agent are best, and foam volume and foam half bleed phase see Fig. 1 with suds-stabilizing agent concentration curve.
Embodiment 4
With the foam stability energy of suds-stabilizing agent under the method mensuration normal temperature of high-speed stirring.
According to whipping agent (by mass concentration be 0.2% alpha-olefin sodium sulfonate and mass concentration be 0.3% sodium lauryl sulphate form) mass concentration is 0.5%, suds-stabilizing agent is (by Polyanionic Cellulose, agar powder, cycloheptaamylose, tripoly phosphate sodium STPP and trolamine are 60:8:4:5:3 composition according to mass ratio) mass concentration is 0.08%, be mixed with foam composition (being an aqueous solution) 1000mL, pH value is 6-9, compound method is: be mixed in proportion by each raw material, 20-35 minute is stirred at 75 DEG C, after mixing, cooling, obtain described foam composition.
Getting above-mentioned solution 200mL adjusts in device in automatically mixed, after (3000rad/min) stirs 60s at a high speed, is poured into by foam and reads lather volume in 1000mL graduated cylinder and be foam volume.After pouring foam into 1000mL graduated cylinder, start timing immediately, record foam separates out the time of 100mL water, is the foam half bleed phase simultaneously.The present embodiment uses different suds-stabilizing agent (whipping agent and concentration constant) thereof at normal temperatures, observes foam volume and the changing conditions of foam half bleed phase.Experimental result is in table 4.
Under table 4 normal temperature, various suds-stabilizing agent is on the impact of foam composition physical performance
As can be seen from foam volume, the experimental result of foam half bleed phase of table 4, after adding the composite suds-stabilizing agent of the present embodiment, blowing agent stabilizer performance is better, and this shows, nitrogen foam combination flooding suds-stabilizing agent of the present invention has higher foam stability energy.
Embodiment 5
The foam stability energy of the suds-stabilizing agent after heatproof is measured by the method for high-speed stirring.
Foam composition 300mL in Example 4 puts into high-temperature high-pressure reaction kettle or high temperature resistant steel cylinder, be placed on after sealing in pyrostal, take out after constant temperature 24h at 120 DEG C, opening kettle or high temperature resistant steel cylinder after naturally cooling to room temperature, to take out sample solution for subsequent use, getting said sample solution 200mL with graduated cylinder adjusts in device in automatically mixed, after (3000rad/min) stirs 60s at a high speed, foam is poured in 1000mL graduated cylinder and read lather volume, be the foam volume after heatproof.After pouring foam into 1000mL graduated cylinder, start timing immediately, record foam separates out the time of 100mL water, is the foam after the heatproof half bleed phase simultaneously.The present embodiment at high temperature uses different suds-stabilizing agent (whipping agent and concentration constant) thereof, observes foam volume and the changing conditions of foam half bleed phase.Experimental result is in table 5.
After table 5 heatproof, various suds-stabilizing agent is on the impact of foam composition physical performance
As can be seen from foam volume, the experimental result of foam half bleed phase of table 5, add the present embodiment composite suds-stabilizing agent and after heat, foaming agent foam volume change is not very large, the foam half bleed phase also extends to some extent, this shows, nitrogen foam combination flooding suds-stabilizing agent of the present invention is high temperature resistant, good stability.
Embodiment 6
The concentrations versus of suds-stabilizing agent.
Adopting by Polyanionic Cellulose, agar powder, cycloheptaamylose, tripoly phosphate sodium STPP and trolamine is the suds-stabilizing agent that 60:8:4:5:3 forms according to mass ratio, foam composition containing different concns suds-stabilizing agent is carried out to the test of foam volume and foam half bleed phase, test is carried out at normal temperatures, identical with embodiment 4 of testing method.Wherein, in the total mass of foam composition, the mass concentration scope of suds-stabilizing agent is 0.01%-0.12%, whipping agent (by mass concentration be 0.2% alpha-olefin sodium sulfonate and mass concentration be 0.3% sodium lauryl sulphate form) mass concentration is 0.5%, the pH value of foam composition is 6-9, the compound method of foam composition and identical in embodiment 4.Experimental result is in table 6.
Table 6 suds-stabilizing agent concentration is on the impact of foam composition physical performance
The experimental result of table 6 shows: under same density of foaming agent, and foam volume reduces with the increase of suds-stabilizing agent concentration, and the foam half bleed phase extends with the increase of concentration; When suds-stabilizing agent concentration is 0.08wt%, foaming power and the stability of whipping agent are best, and foam volume and foam half bleed phase see Fig. 2 with suds-stabilizing agent concentration curve.
Embodiment 7
With the foam stability energy of suds-stabilizing agent under the method mensuration normal temperature of high-speed stirring.
According to whipping agent (by mass concentration be 0.3% alpha-olefin sodium sulfonate and mass concentration be 0.3% sodium lauryl sulphate form) mass concentration is 0.6%, suds-stabilizing agent is (by Polyanionic Cellulose, agar powder, cycloheptaamylose, tripoly phosphate sodium STPP and trolamine are 62:7:3:4:4 composition according to mass ratio) mass concentration is 0.08%, be mixed with foam composition (being an aqueous solution) 1000mL, pH value is 6-9, compound method is: be mixed in proportion by each raw material, 20-35 minute is stirred at 85 DEG C, after mixing, cooling, obtain described foam composition.
Getting above-mentioned solution 200mL adjusts in device in automatically mixed, after (3000rad/min) stirs 60s at a high speed, is poured into by foam and reads lather volume in 1000mL graduated cylinder and be foam volume.After pouring foam into 1000mL graduated cylinder, start timing immediately, record foam separates out the time of 100mL water, is the foam half bleed phase simultaneously.The present embodiment uses different suds-stabilizing agent (whipping agent and concentration constant) thereof at normal temperatures, observes foam volume and the changing conditions of foam half bleed phase.Experimental result is in table 7.
Under table 7 normal temperature, various suds-stabilizing agent is on the impact of foam composition physical performance
As can be seen from foam volume, the experimental result of foam half bleed phase of table 7, after adding the composite suds-stabilizing agent of the present embodiment, blowing agent stabilizer performance is better, and this shows, nitrogen foam combination flooding suds-stabilizing agent of the present invention has higher foam stability energy.
Embodiment 8
The foam stability energy of the suds-stabilizing agent after heatproof is measured by the method for high-speed stirring.
Foam composition 300mL in Example 7 puts into high-temperature high-pressure reaction kettle or high temperature resistant steel cylinder, be placed on after sealing in pyrostal, take out after constant temperature 24h at 120 DEG C, opening kettle or high temperature resistant steel cylinder after naturally cooling to room temperature, to take out sample solution for subsequent use, getting said sample solution 200mL with graduated cylinder adjusts in device in automatically mixed, after (3000rad/min) stirs 60s at a high speed, foam is poured in 1000mL graduated cylinder and read lather volume, be the foam volume after heatproof.After pouring foam into 1000mL graduated cylinder, start timing immediately, record foam separates out the time of 100mL water, is the foam after the heatproof half bleed phase simultaneously.The present embodiment at high temperature uses different suds-stabilizing agent (whipping agent and concentration constant) thereof, observes foam volume and the changing conditions of foam half bleed phase.Experimental result is in table 8.
After table 8 heatproof, various suds-stabilizing agent is on the impact of foam composition physical performance
As can be seen from foam volume, the experimental result of foam half bleed phase of table 8, add the present embodiment composite suds-stabilizing agent and after heat, foaming agent foam volume change is not very large, the foam half bleed phase also extends to some extent, this shows, nitrogen foam combination flooding suds-stabilizing agent of the present invention is high temperature resistant, good stability.
Embodiment 9
The concentrations versus of suds-stabilizing agent.
Adopting by Polyanionic Cellulose, agar powder, cycloheptaamylose, tripoly phosphate sodium STPP and trolamine is the suds-stabilizing agent that 62:7:3:4:4 forms according to mass ratio, foam composition containing different concns suds-stabilizing agent is carried out to the test of foam volume and foam half bleed phase, test is carried out at normal temperatures, identical with embodiment 7 of testing method.Wherein, in the total mass of foam composition, the mass concentration scope of suds-stabilizing agent is 0.01%-0.12%, whipping agent (by mass concentration be 0.3% alpha-olefin sodium sulfonate and mass concentration be 0.3% sodium lauryl sulphate form) mass concentration is 0.6%, the pH value of foam composition is 6-9, the compound method of foam composition and identical in embodiment 7.Experimental result is in table 9.
Table 9 suds-stabilizing agent concentration is on the impact of foam composition physical performance
The experimental result of table 9 shows: under same density of foaming agent, and foam volume reduces with the increase of suds-stabilizing agent concentration, and the foam half bleed phase extends with the increase of concentration; When suds-stabilizing agent concentration is 0.08wt%, foaming power and the stability of whipping agent are best, and foam volume and foam half bleed phase see Fig. 3 with suds-stabilizing agent concentration curve.
Embodiment 10
The present embodiment provide a kind of adopt the foam composition containing composite nitrogen foam combination flooding suds-stabilizing agent in embodiment 1 (this foam composition be by mass concentration be 0.3% alpha-olefin sodium sulfonate and mass concentration be 0.2% the total mass concentration that forms of sodium lauryl sulphate be 0.5% whipping agent and by Polyanionic Cellulose, agar powder, cycloheptaamylose, tripoly phosphate sodium STPP and trolamine are the aqueous solution of the suds-stabilizing agent of 0.07% according to the total mass concentration that mass ratio is 55:7:3:3:2 composition) carry out the oil production method of nitrogen foam combination flooding.
The method comprises the following steps: mixed with the volume ratio of underground nitrogen according to 1:3 by this foam composition, after obtained nitrogen foam plugging agent, is injected in mid-deep strata edge-bottom water fractured reservoir 1 well group target oil reservoir.Injection length is 45 days, accumulative injection foam composition 2260m
3, nitrogen 908000m
3.First inject by anionic polyacrylamide (the Panjin Liaohe Oil Field Hai Lan Chemical Co., Ltd. of 0.15wt% with cementing truck, molecular weight is 2,000 ten thousand, degree of hydrolysis 30%) the compound envelope that forms of the rubber grain (Panjin Chen Yu petroleum engineering company limited, particle diameter is 300 orders) that carries 4wt% alters agent 1000m
3(surplus is water); Stop note envelope after playing pressure and alter agent, adopt mode metaideophone nitrogen and the foam composition of simultaneous implantation, vapour-liquid ratio is 3:1 (volume ratio), and construction injection pressure is 17-18MPa; Adjust stifled after, corresponding recovery well well group comprehensive water cut declines 3.5%, well group day produce oil rise to 15.2t from 11.8t, accumulatively increase oily 1386t.
Claims (8)
1. a nitrogen foam combination flooding suds-stabilizing agent, its raw material composition comprises: Polyanionic Cellulose, agar powder, cycloheptaamylose, tripoly phosphate sodium STPP and trolamine, wherein, the mass ratio of described Polyanionic Cellulose, agar powder, cycloheptaamylose, tripoly phosphate sodium STPP and trolamine is (50-65): (5-10): (2-5): (3-6): (1-5).
2. the foam composition containing nitrogen foam combination flooding suds-stabilizing agent according to claim 1, in the total mass of described foam composition, its raw material composition comprises: alpha-olefin sodium sulfonate 0.2-0.5%, sodium lauryl sulphate 0.1-0.3%, described nitrogen foam combination flooding suds-stabilizing agent 0.01-0.12% and water surplus.
3. foam composition according to claim 2, its pH value is 6-9.
4. the preparation method of the foam composition containing described nitrogen foam combination flooding suds-stabilizing agent described in a Claims 2 or 3, it comprises the following steps: proportionally mixed by each raw material, stirs 20-35 minute, after mixing at 60-90 DEG C, cooling, obtains described foam composition.
5. adopt the oil production method carrying out nitrogen foam combination flooding containing the foam composition of described nitrogen foam combination flooding suds-stabilizing agent described in Claims 2 or 3, the method comprises the following steps: described foam composition is synchronous with nitrogen and/or be alternately injected in target oil reservoir.
6. oil production method according to claim 5, wherein, the volume ratio of described foam composition and underground nitrogen is 1:(2-3).
7. oil production method according to claim 5, wherein, the pressure of injection is within 25MPa.
8. nitrogen foam combination flooding suds-stabilizing agent according to claim 1 and/or the application of foam composition in mid-deep strata edge-bottom water fractured reservoir nitrogen foam compound petroleum driving and recovering containing described nitrogen foam combination flooding suds-stabilizing agent described in Claims 2 or 3.
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| CN113444506A (en) * | 2020-03-26 | 2021-09-28 | 中国石油天然气股份有限公司 | Deep profile control channeling sealing agent and preparation method and application method thereof |
| CN117106430A (en) * | 2023-10-18 | 2023-11-24 | 西南石油大学 | A control and flooding system suitable for strongly heterogeneous reservoirs and its application |
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| CN113444506B (en) * | 2020-03-26 | 2022-10-04 | 中国石油天然气股份有限公司 | Deep profile control channeling sealing agent and preparation method and application method thereof |
| CN117106430A (en) * | 2023-10-18 | 2023-11-24 | 西南石油大学 | A control and flooding system suitable for strongly heterogeneous reservoirs and its application |
| CN117106430B (en) * | 2023-10-18 | 2024-01-23 | 西南石油大学 | Profile control and flooding system suitable for strong heterogeneous oil reservoir and application |
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