CN103224776A - Oilfield flooding stratum protective agent and preparation method and application thereof - Google Patents
Oilfield flooding stratum protective agent and preparation method and application thereof Download PDFInfo
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- CN103224776A CN103224776A CN2013101084264A CN201310108426A CN103224776A CN 103224776 A CN103224776 A CN 103224776A CN 2013101084264 A CN2013101084264 A CN 2013101084264A CN 201310108426 A CN201310108426 A CN 201310108426A CN 103224776 A CN103224776 A CN 103224776A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 239000003223 protective agent Substances 0.000 title abstract 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 52
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims abstract description 24
- 238000000034 method Methods 0.000 claims abstract description 17
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims abstract description 12
- 229920002125 Sokalan® Polymers 0.000 claims abstract description 9
- 239000002253 acid Substances 0.000 claims abstract description 9
- 239000004584 polyacrylic acid Substances 0.000 claims abstract description 9
- 238000003756 stirring Methods 0.000 claims description 59
- 239000000463 material Substances 0.000 claims description 28
- 230000001681 protective effect Effects 0.000 claims description 24
- -1 polyoxyethylene Polymers 0.000 claims description 22
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 15
- 229910052742 iron Inorganic materials 0.000 claims description 13
- 239000011814 protection agent Substances 0.000 claims description 12
- 150000001735 carboxylic acids Chemical class 0.000 claims description 10
- 229920000141 poly(maleic anhydride) Polymers 0.000 claims description 9
- 239000003795 chemical substances by application Substances 0.000 claims description 8
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims description 6
- ZNFNDZCXTPWRLQ-UHFFFAOYSA-N butane-1,1,1-tricarboxylic acid Chemical compound CCCC(C(O)=O)(C(O)=O)C(O)=O ZNFNDZCXTPWRLQ-UHFFFAOYSA-N 0.000 claims description 4
- 125000001476 phosphono group Chemical group [H]OP(*)(=O)O[H] 0.000 claims description 3
- 230000008021 deposition Effects 0.000 claims description 2
- 239000004094 surface-active agent Substances 0.000 claims description 2
- 239000011435 rock Substances 0.000 abstract description 12
- 238000011161 development Methods 0.000 abstract description 3
- 239000002736 nonionic surfactant Substances 0.000 abstract 2
- IQEKRNXJPCBUAT-UHFFFAOYSA-N 2-[hydroperoxy(hydroxy)phosphoryl]acetic acid Chemical compound OOP(O)(=O)CC(O)=O IQEKRNXJPCBUAT-UHFFFAOYSA-N 0.000 abstract 1
- ACFOQSFTZHRLHN-UHFFFAOYSA-N 2-phosphanylbutane-1,1,1-tricarboxylic acid Chemical compound PC(C(C(=O)O)(C(=O)O)C(=O)O)CC ACFOQSFTZHRLHN-UHFFFAOYSA-N 0.000 abstract 1
- 229920001444 polymaleic acid Polymers 0.000 abstract 1
- 230000006378 damage Effects 0.000 description 13
- 230000035699 permeability Effects 0.000 description 10
- 208000027418 Wounds and injury Diseases 0.000 description 9
- 238000011049 filling Methods 0.000 description 9
- 208000014674 injury Diseases 0.000 description 9
- 230000000087 stabilizing effect Effects 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 5
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 235000012204 lemonade/lime carbonate Nutrition 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 240000006909 Tilia x europaea Species 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
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- 239000003129 oil well Substances 0.000 description 4
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- 239000003643 water by type Substances 0.000 description 4
- 125000000217 alkyl group Chemical group 0.000 description 3
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- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 125000004432 carbon atom Chemical group C* 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000008367 deionised water Substances 0.000 description 2
- 229910021641 deionized water Inorganic materials 0.000 description 2
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- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
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- RNMDNPCBIKJCQP-UHFFFAOYSA-N 5-nonyl-7-oxabicyclo[4.1.0]hepta-1,3,5-trien-2-ol Chemical compound C(CCCCCCCC)C1=C2C(=C(C=C1)O)O2 RNMDNPCBIKJCQP-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 238000002144 chemical decomposition reaction Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
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- 230000000694 effects Effects 0.000 description 1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
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Abstract
The invention relates to an oilfield flooding stratum protective agent and a preparation method and application thereof. The protective agent comprises the following components: 20-22.5% of polycarboxylic acid, (b) 20-22.5% of organic phosphoric acid, (C) 3-5% of nonionic surfactant, and the balance of water; the polycarboxylic acid is selected from polyacrylic acid or hydrolyzed polymaleic acid, the organic phosphoric acid is selected from phosphinobutane tricarboxylic acid or hydroxyphosphonoacetic acid, and the nonionic surfactant is alkylphenol ethoxylates; the percentages are weight percentages. The method has good application prospect for the economic and effective development of clastic rock oil reservoirs, particularly low-permeability oil reservoirs.
Description
Technical field
The invention relates to a kind of oil-field flooding stratum protection agent and preparation method thereof and application.
Background technology
In the oilfield development process, because compatibleness is poor between injection water and local water and local water and the local water, local water itself is unstable, injects water and reservoir rock and is incompatible, local water is rich in iron ion, will inevitably produce following reservoir damage in the field produces operational process:
1, endanger in water filling, oil recovery, collection fouling defeated, that the generation of water treatment system is serious, influence is produced and is normally carried out.
2, cause the reservoir swelling clay mineral after low mineralization injection water enters reservoir, peel off, migrate, stop up reservoir pore space and shout.
3, be rich in iron-bearing mineral in the reservoir rock mineral, the iron ion that contains higher concentration in the local water, on the one hand under outside fluid aerobic or pH value condition with higher, form ironic hydroxide and ferriferous oxide and stop up the stratum, on the other hand, when causing acidifying, iron ion produces acid sludge, high score subclass oil field chemical degradation.
Very general for the above-mentioned injury of low permeability oil field, reservoir is oozed ability and greatly influence of oil and water well ordinary production generation.
In oilfield development process, take technical measures, set up technological regime and prevent and alleviate this type of injury at the technical problem that influences field produces operation, efficient for the oil field, steadily exploitation is most important.Stratum fouling and water-sensitive are mainly taked to inject water both at home and abroad and add scale inhibitor, slug formula squeeze note clay stabilizer continuously, add measures such as Fe stabilizer, reservoir acidifying, pressure break and prevent and treat reservoir damage, improve reservoir and ooze ability.Shortcomings such as aforesaid method exists with strong points, and the measure workload is big, and validity period is short, and medicament use kind and consumption are big.Following four pieces of documents are mentioned foregoing.
" Ansai Oilfield waterflooding middle and later periods composite blockage relieving acid solution experimental formula ", " petroleum prospecting and exploitation ", 2005,32 (6);
" producing well earth formation deep fouling Prevention Technique ", " petroleum prospecting and exploitation ", 2003,29 (5);
" research of long celebrating low permeability oil field Stability Technique of Water Quality ", " petroleum prospecting and exploitation ", 2003,29 (5);
" Ansai Oilfield Triassic Yanchang Formation extra-low permeability oil reservoirs yield-increasing technology ", " petroleum prospecting and exploitation ", 2006,33 (5).
By using the agent of oil-field flooding stratum protection can realize preventing the stratum to have fouling, water-sensitive and acid-sensitive injury or above-mentioned one to two kind of injury simultaneously.Realizing adopting a kind of medicament to bring into play multiple performance, can reduce on-the-spot measure work of treatment amount, alleviate personnel's work load, is the technology that site operation presses for.
Summary of the invention
One object of the present invention is to provide the agent of a kind of oil-field flooding stratum protection; to realize that the prevention stratum exists fouling, water-sensitive and acid-sensitive injury or above-mentioned one to two kind of injury simultaneously; and realize adopting a kind of medicament to bring into play multiple performance; to reduce on-the-spot measure work of treatment amount, alleviate personnel's work load.
Another object of the present invention is to provide described oil-field flooding stratum protection agent preparation method.
A further object of the present invention is to provide the application of described oil-field flooding stratum protection agent.
For reaching above-mentioned purpose, on the one hand, the invention provides the agent of a kind of oil-field flooding stratum protection: described protective material comprises following component: (a), poly carboxylic acid 20-22.5%, and (b), organic phosphoric acid 20-22.5%, (C), nonionic surface active agent 3-5%, other compositions are water; Described poly carboxylic acid is selected from polyacrylic acid or hydrolyzed polymaleic anhydride, and described organic phosphoric acid is selected from phosphono-containing butane tricarboxylic acid or HPAA, and described nonionogenic tenside is an alkylphenol polyoxyethylene; Described per-cent is weight percentage.
Wherein said per-cent is 100% in described protective material gross weight.
Polyacrylic acid of the present invention is preferably the polyacrylic acid of molecular weight 700-1000; Hydrolyzed polymaleic anhydride of the present invention is preferably the hydrolyzed polymaleic anhydride of molecular weight 400-800.
Described polyacrylic acid, hydrolyzed polymaleic anhydride and alkylphenol polyoxyethylene are this area and use always, as long as the mentioned reagent of selecting to meet commercially available national standard promptly can be applicable to the present invention and realizes goal of the invention.
Conventional commercially available polyacrylic acid, hydrolyzed polymaleic anhydride, see basic butane tricarboxylic acid or HPAA are generally aqueous solution form; poly carboxylic acid 20-22.5% of the present invention; organic phosphoric acid 20-22.5% should be understood to poly carboxylic acid, the usage percentage of organic phosphoric acid own, and wherein water does not count.
Wherein alkylphenol polyoxyethylene is well known to those skilled in the art, for example alkyl is the alkylphenol polyoxyethylene of carbonatoms 1-10 positive integer, wherein preferred alkyl is the alkylphenol polyoxyethylene of carbonatoms 5-10 positive integer, more preferably straight chained alkyl wherein, polyoxyethylene nonylphenol ether and polyoxyethylene octylphenol ether for example commonly used.
According to specific embodiments of the present invention, preferred described protective material prepares in accordance with the following methods, and this method comprises the steps:
(1) under the room temperature, stirs down, nonionogenic tenside is added to the water stirring and dissolving;
(2) stir and down poly carboxylic acid to be joined in the solution that step (1) obtains stirring and dissolving;
(3) stir and down organic phosphoric acid to be joined in the solution that step (2) obtains, stir promptly.
According to specific embodiments of the present invention, the speed that described each material of preferred steps (1)-(3) adds be the 5-10 liter/minute.
Wherein the stirring of step (1)-(3) is known usually by those skilled in the art, and those skilled in the art can clearly know the proper range of the speed of described stirring according to common prior art in this area of its grasp and experience.And the present invention preferably, and the speed of described stirring is 50～100 rev/mins of rotating speeds.
On the other hand, the present invention also provides described oil-field flooding stratum protection agent preparation method: described preparation method comprises the steps:
(1) under the room temperature, stirs down, nonionogenic tenside is added to the water stirring and dissolving;
(2) stir and down poly carboxylic acid to be joined in the solution that step (1) obtains stirring and dissolving;
(3) stir and down organic phosphoric acid to be joined in the solution that step (2) obtains, stir promptly.
According to specific embodiments of the present invention, the speed that described each material of preferred steps (1)-(3) adds be the 5-10 liter/minute.
Wherein the stirring of step (1)-(3) is known usually by those skilled in the art, and those skilled in the art can clearly know the proper range of the speed of described stirring according to common prior art in this area of its grasp and experience.And the present invention preferably, and the speed of described stirring is 50～100 rev/mins of rotating speeds.
Among the present invention, used water can be deionized water during the preparation protective material.
On the one hand, the present invention also provides the application of described oil-field flooding stratum protection agent again.
According to specific embodiments of the present invention, the preferred described control that is applied as the oilfield reservoir obstruction.
According to specific embodiments of the present invention, preferred described oilfield reservoir stops up to fouling, water-sensitive, acid-sensitive, iron ion deposition and causes.
Protectant using method of the present invention can be carried out according to other similar protective material operations in the prior art, additionally pays creative work again and need not those skilled in the art.
In sum, the invention provides a kind of oil-field flooding stratum protection agent and preparation method thereof and application.This protective material is to certain oil field common fouling system lime carbonate antiscaling rate＞80%; sulfate scale antiscaling rate＞80%; clay prevents that swollen rate (1% working concentration) can reach 90%; the iron ion stabilizing power can reach domestic certain the hyposmosis natural sandstone coreflooding experiment of 1000ppm. and shows during 1% working concentration; this agent can significantly improve the original permeability of rock core under 2% working concentration; increase rate surpasses 30%; rock core after the protective material displacement normally inject again water drive for the time, the rate of permeation of rock core does not show injury.At the oil reservoir of waterflooding, before the water injection well stake, or oil and water well is after other de-plugging measures are handled, and the present invention carries out pre-treatment, can effectively improve zone permeability.
Protective material of the present invention be applicable to the clastic reservoir rock oil, well of various permeability range go into operation before and after or after the conventional pressure break, acidifying oil and water well immediate vicinity of wellbore or earth formation deep the formation damage control and remove, and keep surpassing validity period more than 10 months.Also can add continuously, prevent and treat the fouling injury on waterflood system and water filling stratum by waterflood system.The successful Application of domestic certain low infiltration sandrock oil reservoir shows that this is invented the petroclastic rock oil reservoir, and especially the exploitation of low-permeability oil deposit economical and effective has a good application prospect.
Description of drawings
Fig. 1 is the protectant anti-swollen performance histogram of the present invention, and wherein protective material 1,2,3 is respectively the product of embodiment one, two, three.
Embodiment
Below describe the beneficial effect of implementation process of the present invention and generation in detail by specific embodiment, be intended to help the reader to understand essence of the present invention and characteristics better, but not as qualification to this case practical range.
Embodiment one:
Add 50 kilograms of deionized waters earlier in 1 side reactor still, elder generation presses under 5-10 liter/minute flow velocity and 50-100 rev/min of stirring velocity and adds 30 kilograms of polyoxyethylene nonylphenol ethers, and stirring and dissolving is complete under 50-100 rev/min of stirring velocity; Be the polyacrylic acid of 700-1000 by adding 450 kilograms of effective contents 45%, molecular weight under 5-10 liter/minute flow velocity and the 50-100 rev/min of stirring velocity again; Stirring and dissolving is complete; Press the HPAA that adds 450 kilograms of effective contents 45% of weight under 5-10 liter/minute flow velocity and the 50-100 rev/min of stirring velocity; Stirring and dissolving is complete, presses under 5-10 liter/minute flow velocity and 50-100 rev/min of stirring velocity to add 20 kilograms of deionized waters of weight.After the abundant dissolving that stirs under the 50-100 rev/min of stirring velocity, promptly get this product.
Described composition is used for oilfield oil well go into operation before squeeze note after slug squeeze note or pressure break, the acidifying.Individual well consumption 1-2 ton, working concentration 2-5%.Also can adopt the method that adds continuously, add concentration 20-80mg/L in waterflood system and gathering system.
When the squeeze note protective material was constructed after slug squeeze note or pressure break, the acidifying before oil and water well was gone into operation, handle pit shaft earlier to unimpeded, water flushing is to well head Inlet and outlet water water quality unanimity; Seat high-pressure well mouth during construction connects surface pipeline, and pressure testing 25MPa does not sting and do not leak for qualified.Discharge capacity squeeze note protective material 20-50m by 200 liters/minute
3, the closing well reaction changed normal water filling over to after 24 hours.
Waterflood system and gathering system adopt when adding continuously, adopt volume pump to add continuously with gathering system manifold bag place before the waterflood system strainer.
The present embodiment product is to the common lime carbonate in certain oil field, vitriol mixing fouling system antiscaling rate 85% (20-80PPm working concentration).Anti-clayswelling rate (1% working concentration) can reach 91%, and the iron ion stabilizing power can reach 1000ppm (1% (working concentration)), and anti-swollen performance as shown in Figure 1.
Embodiment two:
Add 50 kilograms of deionized waters earlier in 1 side reactor still, add 50 kilograms of polyoxyethylene octylphenol ethers by adding under 5-10 liter/minute flow velocity and 50-100 rev/min of stirring velocity earlier, stirring and dissolving is complete under 50-100 rev/min of stirring velocity; Be the hydrolyzed polymaleic anhydride of 400-800 by adding 450 kilograms of effective contents 45%, molecular weight under 5-10 liter/minute flow velocity and the 50-100 rev/min of stirring velocity again, stirring and dissolving is complete; Press the phosphono-containing butane tricarboxylic acid acid that adds 450 kilograms of effective contents 45% of weight under 5-10 liter/minute flow velocity and the 50-100 rev/min of stirring velocity; Stirring and dissolving is complete, promptly gets this product after the abundant dissolving that stirs under the 50-100 rev/min of stirring velocity.
Described composition is used for oilfield oil well go into operation before squeeze note after slug squeeze note or pressure break, the acidifying.Individual well consumption 1-2 ton, working concentration 2-5%.Also can adopt the method that adds continuously, add concentration 20-60mg/L in waterflood system and gathering system.
When the squeeze note protective material was constructed after slug squeeze note or pressure break, the acidifying before oil and water well was gone into operation, handle pit shaft earlier to unimpeded, water flushing is to well head Inlet and outlet water water quality unanimity; Seat high-pressure well mouth during construction connects surface pipeline, and pressure testing 25MPa does not sting and do not leak for qualified.Discharge capacity squeeze note protective material 20-50m by 200 liters/minute
3, the closing well reaction changed normal water filling over to after 24 hours.
Waterflood system and gathering system adopt when adding continuously, adopt volume pump to add continuously with gathering system manifold bag place before the waterflood system strainer.
The present embodiment product is to the common lime carbonate in certain oil field, vitriol mixing fouling system antiscaling rate 82% (20-80PPm working concentration).Anti-clayswelling rate (1% working concentration) can reach 94%, and the iron ion stabilizing power can reach 1000ppm (1% (working concentration)), and anti-swollen performance as shown in Figure 1.
Embodiment three:
Add 50 kilograms of deionized waters earlier in 1 side reactor still, add 30 kilograms of polyoxyethylene octylphenol ethers by adding under 5-10 liter/minute flow velocity and 50-100 rev/min of stirring velocity earlier, stirring and dissolving is complete under 50-100 rev/min of stirring velocity; By adding under 5-10 liter/minute flow velocity and 50-100 rev/min of stirring velocity, adding 400 kilograms of effective contents 50%, molecular weight is the hydrolyzed polymaleic anhydride of 400-800 again, and stirring and dissolving is complete; Press the HPAA that adds 400 kilograms of effective contents 50% of weight under 5-10 liter/minute flow velocity and the 50-100 rev/min of stirring velocity; Stirring and dissolving is complete, presses under 5-10 liter/minute flow velocity and 50-100 rev/min of stirring velocity to add weight 120 kg deionized water.After the abundant dissolving that stirs under the 50-100 rev/min of stirring velocity, promptly get this product.
Described composition is used for oilfield oil well go into operation before squeeze note after slug squeeze note or pressure break, the acidifying.Individual well consumption 1-2 ton, working concentration 2-5%.Also can adopt the method that adds continuously, add concentration 40-80mg/L in waterflood system and gathering system.
When the squeeze note protective material was constructed after slug squeeze note or pressure break, the acidifying before oil and water well was gone into operation, handle pit shaft earlier to unimpeded, water flushing is to well head Inlet and outlet water water quality unanimity; Seat high-pressure well mouth during construction connects surface pipeline, and pressure testing 25MPa does not sting and do not leak for qualified.Discharge capacity squeeze note protective material 20-50m by 200 liters/minute
3, the closing well reaction changed normal water filling over to after 24 hours.
Waterflood system and gathering system adopt when adding continuously, adopt volume pump to add continuously with gathering system manifold bag place before the waterflood system strainer.
The present embodiment product is to the common lime carbonate in certain oil field, vitriol mixing fouling system antiscaling rate 84% (20-80PPm working concentration).Anti-clayswelling rate (1% working concentration) can reach 82%, and the iron ion stabilizing power can reach 1000ppm (1% (working concentration)), and anti-swollen performance as shown in Figure 1.
By the composite water filling stratum protection agent that forms of this system, show that through domestic certain hyposmosis natural sandstone coreflooding experiment this agent can significantly improve the original permeability of rock core under 2% working concentration, increase rate surpasses 30%; Rock core after the protective material displacement normally inject again water drive for the time, the rate of permeation of rock core does not show injury.At the oil reservoir of waterflooding, before the water injection well stake, or oil and water well is after other de-plugging measures are handled, and the present invention carries out pre-treatment, can effectively improve zone permeability.
To the common lime carbonate in certain oil field, vitriol mixing fouling system antiscaling rate＞80% (20-80PPm working concentration).Anti-clayswelling rate (1% working concentration) can reach 82% (see figure 1), and the iron ion stabilizing power can reach 1000PPm (1% (working concentration)).
Embodiment 1 preparation water filling stratum protection agent shows that through domestic certain hyposmosis natural sandstone coreflooding experiment this agent can significantly improve the original permeability of rock core under 2% working concentration, and increase rate surpasses 42.7%.(seeing Table 1)
Simultaneously iron ion is had the satisfactory stability effect, see Table 2, wherein protective material 1,2,3 is respectively the product of embodiment one, two, three.
Table 1 embodiment one protective material is to stratum core damage data sheet
Table 2 protective material iron ion stabilizing power data sheet
Embodiment two preparation water filling stratum protection agent are stopped up serious oil and water well at certain oil field low permeability formation oil reservoir and are used, and 2 tons of individual well consumptions are diluted to 2-5%, squeeze note response of stratum 24 hours, and not discharge opeing directly changes ordinary production over to.2 mouthfuls of 470 days oil well average effective phases, accumulative total increases 7000 tons of oil; 7 mouthfuls of well saliva wells accumulate injection rate and surpass 87000 sides, 480 days average effective phases.
These embodiment one, three preparation water filling stratum protection agent are used at the serious website of 4 foulings of certain oilfield transportation system, adopt continuous mode, add concentration 30-80mg/L, and the fouling pipeline replacement cycle extended to more than 22 months by 5 months.
Claims (9)
1. oil-field flooding stratum protection agent is characterized in that, described protective material comprises following component: (a), poly carboxylic acid 20-22.5%, (b), organic phosphoric acid 20-22.5%, (C), nonionic surface active agent 3-5%, surplus is a water; Described poly carboxylic acid is selected from polyacrylic acid or hydrolyzed polymaleic anhydride, and described organic phosphoric acid is selected from phosphono-containing butane tricarboxylic acid or HPAA, and described nonionogenic tenside is an alkylphenol polyoxyethylene; Described per-cent is weight percentage.
2. protective material according to claim 1 is characterized in that, described polyacrylic acid molecular weight is 700-1000; Described hydrolyzed polymaleic anhydride molecular weight is 400-800.
3. protective material according to claim 1 and 2 is characterized in that described protective material prepares in accordance with the following methods, and the method comprising the steps of:
(1) under the room temperature, stirs down, nonionogenic tenside is added to the water stirring and dissolving;
(2) stir and down poly carboxylic acid to be joined in the solution that step (1) obtains stirring and dissolving;
(3) stir and down organic phosphoric acid to be joined in the solution that step (2) obtains, stir promptly.
4. protective material according to claim 3 is characterized in that, the speed that each material of step (1)-(3) adds be the 5-10 liter/minute.
5. the preparation method of any described oil-field flooding stratum protection of claim 1-4 agent is characterized in that described preparation method comprises the steps:
(1) under the room temperature, stirs down, nonionogenic tenside is added to the water stirring and dissolving;
(2) stir and down poly carboxylic acid to be joined in the solution that step (1) obtains stirring and dissolving;
(3) stir and down organic phosphoric acid to be joined in the solution that step (2) obtains, stir promptly.
6. method according to claim 5 is characterized in that, the speed that each material of step (1)-(3) adds be the 5-10 liter/minute.
7. the application of any described oil-field flooding stratum protection of claim 1-4 agent in well treatment.
8. application according to claim 7 is characterized in that, the described control that is applied as the oilfield reservoir obstruction.
9. application according to claim 8 is characterized in that, described oilfield reservoir stops up to fouling, water-sensitive, acid-sensitive, iron ion deposition and causes.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105219368A (en) * | 2015-09-14 | 2016-01-06 | 中国石油化工股份有限公司 | A kind of ternary compound oil drive Scale inhibitors and using method thereof |
| CN106085396A (en) * | 2016-07-08 | 2016-11-09 | 金保全 | Oil well online supermolecule abluent, preparation method and on-line cleaning using method |
| CN106675542A (en) * | 2016-12-12 | 2017-05-17 | 西安天太石化科技有限公司 | Multifunctional polyurethane injection enhancement agent for oil field |
| US11668170B2 (en) | 2020-11-24 | 2023-06-06 | Halliburton Energy Services, Inc. | Enhanced oil recovery harvesting for fractured reservoirs |
| US11668169B2 (en) | 2020-11-24 | 2023-06-06 | Halliburton Energy Services, Inc. | Reactive surfactant flooding at neutral pH |
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| CN105219368B (en) * | 2015-09-14 | 2018-04-20 | 中国石油化工股份有限公司 | A kind of ternary compound oil drive antisludging agent and its application method |
| CN106085396A (en) * | 2016-07-08 | 2016-11-09 | 金保全 | Oil well online supermolecule abluent, preparation method and on-line cleaning using method |
| CN106085396B (en) * | 2016-07-08 | 2019-02-15 | 金保全 | The online supermolecule cleaning agent of oil well, preparation method and on-line cleaning application method |
| CN106675542A (en) * | 2016-12-12 | 2017-05-17 | 西安天太石化科技有限公司 | Multifunctional polyurethane injection enhancement agent for oil field |
| US11668170B2 (en) | 2020-11-24 | 2023-06-06 | Halliburton Energy Services, Inc. | Enhanced oil recovery harvesting for fractured reservoirs |
| US11668169B2 (en) | 2020-11-24 | 2023-06-06 | Halliburton Energy Services, Inc. | Reactive surfactant flooding at neutral pH |
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