CN1268713C - Water glass high temperature blocking agent for oil production - Google Patents
Water glass high temperature blocking agent for oil production Download PDFInfo
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- CN1268713C CN1268713C CN 200410051435 CN200410051435A CN1268713C CN 1268713 C CN1268713 C CN 1268713C CN 200410051435 CN200410051435 CN 200410051435 CN 200410051435 A CN200410051435 A CN 200410051435A CN 1268713 C CN1268713 C CN 1268713C
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Abstract
The present invention relates to water glass high-temperature plugging agents for oil production, which are characterized in that the components of the plugging agents comprise water glass, cross-linking agents and water; when some specific cross-linking agents are used, the plugging agents also comprise surfactant; the applicable temperature range of the plugging agent is wide, the plugging agents are solidified within the temperature range of 60 to 280 DEG C; the solidification time is from 5 to 8 hours at the temperature of 100 DEG C; the solidification time is from 3 to 5 hours at the temperature of 200 DEG C; the solidification time is from 2 to 3 hours at the temperature of 250 DEG C. Because the main body of the plugging agents is inorganic material, after solidified, the plugging agents have high strength and 0.2 to 0.5MPa of the integral compressive strength, and have good thermal stability for long. After solidified, the plugging agents are placed for 2 months at the temperature of 200 DEG C, the strength has no obvious decrease. The preparation method of the present invention is simple, so that the present invention can be directly prepared on the plugging spot. When in use, the present invention is injected with a single-fluid method, has simple construction technology, and is easy to control the plugging effects. The plugging agents are suitable for preventing steam leakage from a steam displacement oil well or a steam soak oil well.
Description
Technical field
The present invention relates to a kind of water glass High Temperature Plugging Agent of the usefulness of recovering the oil, this blocking agent can be used for steam flood or the anti-vapour of steam stimulation oil well is scurried shutoff.
Background technology
In the process of heavy crude producing, the two kinds of methods of steam flood and steam stimulation of using usually reduce viscosity of thickened oil, so that make the easy extraction of viscous crude.In the steam treatment process, because the difference between the density of the nonuniformity of oil reservoir and steam and viscous crude, the gravity segregation and the vapour that steam can occur are scurried phenomenon, cause vapor action efficient and oil recovery factor to reduce, and cost of winning raises.With high permeability formation or the macropore in the blocking agent shutoff oil reservoir, can improve the quality that steam injects, improve the effect of steam-assisted recovery.The blocking agent that is used for steam-assisted recovery must have satisfactory stability and very high intensity under the steam treatment temperature.
Used High Temperature Plugging Agent/amendment by the injection mode branch, can be divided into two-fluid process and single-fluid process two classes; Can be divided into sedimentation type and gel-type two classes.Two-fluid process blocking agent/amendment uses inorganic raw material such as water glass-calcium chloride etc. formulated more, solidifies with coprecipitation mode basically.Such blocking agent/amendment preparation is simpler, and the chemical agent cost is low.Because with the inorganic raw material preparation, so curing or sedimentation speed are fast.Also have alkali paper-making black liquor and spent acid are injected with two-fluid process, two components can play plugging action in underground precipitation.This blocking agent plugging strength is lower than water glass-calcium chloride system, is used for low dose of the injection more.Single-fluid process blocking agent/amendment adopts underground crosslinking method on the spot to solidify more, generally uses organic resin (as resol, tannin extract resin) formulated, has characteristics such as gelation time is long and controlled, component on site construction method is easy.Shortcoming is that the organic chemicals price is higher, and majority at high temperature long-term thermal stability is poor slightly.There also have the people that raw materials such as wilkinite are injected in addition to be underground, makes it at underground formation gel.
As mentioned above, the water glass blocking agent is the wider High Temperature Plugging Agent of a kind of use.But its development is slower.Its major cause is that some index is difficult to control, as temperature to the influence of gelation time etc.In addition, two-fluid process injects and makes site construction technology comparatively loaded down with trivial details, and simultaneously, two kinds of components are incomplete in underground reaction, easily cause plugging effect not obvious.The length of blocking agent gelation time also can directly influence processing parameters such as oil reservoir treatment capacity and injection speed.
Summary of the invention
The object of the present invention is to provide a kind of water glass High Temperature Plugging Agent of the usefulness of recovering the oil, this High Temperature Plugging Agent is should preparation technology easy, and the plugging strength height can inject with single-fluid process during use, solves the variety of issue of above-mentioned prior art.
Purpose of the present invention is achieved through the following technical solutions.
The invention provides a kind of water glass High Temperature Plugging Agent of the usefulness of recovering the oil, it is characterized in that, it is formed, and to count 30%～45% modulus by massfraction be 2.8～3.3 water glass, 0.5%～7.5% linking agent, 0～0.20% tensio-active agent, surplus are water, always consist of 100%.
Described linking agent can oxalic dialdehyde, select in the ester, acid amides a kind of.Described ester can be a monoesters, as ethyl acetate, butylacetate, also can be diester or three esters, as diethyl malonate, triacetin; Described acid amides can be methane amide, ethanamide, urea etc.; If described linking agent be urea, oxalic dialdehyde, ethyl acetate, diethyl malonate, methane amide, ethanamide etc., blocking agent of the present invention does not contain tensio-active agent in forming; If butylacetate or triacetin, need contain the tensio-active agent of massfraction 0.04%～0.20% during then blocking agent is formed.Described tensio-active agent is the water soluble surfactant active of common usefulness, is generally alkylphenol polyoxyethylene (OP) series product, polyoxyethylene octylphenol ether (OP-10) commonly used.
The preparation method of the water glass High Temperature Plugging Agent of a kind of usefulness of recovering the oil of the present invention, adopt usual method, its step is as follows: earlier linking agent is made into stock solution, its concentration does not have strict restriction, as long as concentration is accurate, and when preparing final blocking agent solution, each concentration of component is all got final product in the scope of regulation.If the linking agent that uses be urea, oxalic dialdehyde, water-soluble materials preferably such as ethyl acetate, methane amide and ethanamide, generally need not add tensio-active agent; If use water-soluble relatively poor materials such as butylacetate or triacetin, then need in linking agent, add and be equivalent to the tensio-active agent that blocking agent is always formed massfraction 0.01%～0.5%, could guarantee the abundant mixing of linking agent and water glass.After linking agent prepares, its ratio in accordance with regulations is added in the water glass solution.If necessary, in water glass, add an amount of water, it is diluted to predetermined concentration.Then mixture is stirred, promptly get the water glass High Temperature Plugging Agent.
Constitute each component of blocking agent of the present invention, all can buy from market.
Blocking agent provided by the present invention compared with prior art has following advantage:
(1) broad application temperature range can be solidified in 60～280 ℃ of temperature ranges, and under 100 ℃ of temperature, be 5～8 hours set time; Under 200 ℃, be 3～5 hours set time; Under 250 ℃, be 2～3 hours set time;
(2) because the main body of blocking agent is an inorganic raw material, so the cured strength height, entire compression intensity is between 0.2～0.5MPa;
(3) blocking agent also has good long-term thermal stability, after the curing, places 2 months under 200 ℃ of temperature, and intensity does not have obvious decline;
(4) preparation method is easy, so can use the product of being produced in batches by factory during shutoff, also directly dosing at the scene;
Adopt single-fluid process to inject when (5) using, construction technology is simple, is easy to control plugging effect.
Experiment shows that blocking agent of the present invention is applicable to the shutoff on 100～280 ℃ of temperature stratum, can be used for the anti-vapour of steam flood or steam stimulation oil well and scurries.
Embodiment
Following experiment and operational instances are further to explanation of the present invention, should not be used as limitation of the present invention.
Embodiment 1:
Take by weighing modulus and be 3.1, solid content is the water glass 25g of massfraction 40%, 5mL massfraction 10% oxalic dialdehyde is poured in the water glass in constantly stirring, stir evenly, promptly get High Temperature Plugging Agent of the present invention, its composition is counted 33.33% water glass by massfraction, 1.67% linking agent, 65.00% water.
Embodiment 2:
At first ethyl acetate is added in the water, is made into massfraction 10% solution.Take by weighing modulus and be 2.8, solid content is the water glass 25g of massfraction 50%, the above-mentioned ethyl acetate solution of 3mL is poured in the water glass in constantly stirring again, promptly got High Temperature Plugging Agent of the present invention, its composition is counted 44.64% water glass by massfraction, 1.07% linking agent, 54.29% water.
Embodiment 3:
At first ethyl acetate is added in the water, is made into massfraction 10% solution.Take by weighing modulus and be 2.8, solid content is the water glass 25g of massfraction 50%, again the above-mentioned ethyl acetate solution of 5mL is poured in the water glass in constantly stirring, add 5mL water again, stir evenly, promptly get High Temperature Plugging Agent of the present invention, its composition is counted 35.71% water glass by massfraction, 1.43% linking agent, 62.86% water.
Embodiment 4:
At first butylacetate is added in the water, adds the OP-10 tensio-active agent that is equivalent to butylacetate consumption 3.5% again, stir, be made into massfraction 10% butylacetate milk sap.Take by weighing modulus and be 3.1, solid content is the water glass 25g of massfraction 50%, again the above-mentioned butylacetate emulsion of 5mL is poured in the water glass in constantly stirring, add 10mL water again, stir evenly, promptly get High Temperature Plugging Agent of the present invention, its composition is counted 31.25% water glass by massfraction, 1.25% linking agent, 0.04% tensio-active agent, 67.46% water.
Embodiment 5:
At first diethyl malonate is added in the water, is made into massfraction 10% solution.Take by weighing modulus and be 2.8, solid content is the water glass 25g of massfraction 50%, again the above-mentioned diethyl malonate solution of 3mL is poured in the water glass in constantly stirring, add 5mL water again, stir evenly, promptly get High Temperature Plugging Agent of the present invention, its composition is counted 37.88% water glass by massfraction, 0.90% linking agent, 61.22% water.
Embodiment 6:
At first triacetin is added in the water, adds the OP-10 tensio-active agent that is equivalent to triacetin consumption 10% again, stir, be made into the triacetin milk sap of massfraction 10%.Take by weighing modulus and be 3.3, solid content is the water glass 25g of massfraction 50%, again the above-mentioned triacetin emulsion of 5.5mL is poured in the water glass in constantly stirring, add 5mL water again, stir evenly, promptly get High Temperature Plugging Agent of the present invention, its composition is counted 35.21% water glass by massfraction, 1.55% linking agent, 0.16% tensio-active agent, 63.08% water.
Embodiment 7:
At first methane amide is added in the water, is made into massfraction 10% solution.Take by weighing modulus and be 2.8, solid content is the water glass 25g of massfraction 50%, the above-mentioned formamide soln of 3mL is poured in the water glass in constantly stirring again, promptly got High Temperature Plugging Agent of the present invention, its composition is counted 44.64% water glass by massfraction, 1.07% linking agent, 54.29% water.
Embodiment 8:
At first ethanamide is added in the water, is made into massfraction 30% solution.Take by weighing modulus and be 3.1, solid content is the water glass 25g of massfraction 50%, the above-mentioned acetamide solution of 8mL is poured in the water glass in constantly stirring again, promptly got High Temperature Plugging Agent of the present invention, its composition is counted 37.88% water glass by massfraction, 7.27% linking agent, 54.85% water.
Embodiment 9:
At first urea is added in the water, is made into massfraction 20% solution.Take by weighing modulus and be 3.1, solid content is the water glass 25g of massfraction 50%, the above-mentioned urea soln of 7mL is poured in the water glass in constantly stirring again, promptly got High Temperature Plugging Agent of the present invention, its composition is counted 39.06% water glass by massfraction, 4.38% linking agent, 56.56% water.
Embodiment 10:
At first urea is added in the water, is made into massfraction 20% solution.Take by weighing modulus and be 3.1, solid content is the water glass 25g of massfraction 50%, the above-mentioned urea soln of 4mL is poured in the water glass in constantly stirring again, promptly got High Temperature Plugging Agent of the present invention, its composition is counted 43.10% water glass by massfraction, 2.76% linking agent, 54.14% water.
Embodiment 11:
Get embodiment 1 described High Temperature Plugging Agent 50mL, placing volume is the stainless steel cylinder of 100mL, with the stainless steel cylinder sealing, places 280 ℃ of muffle furnaces.Open steel cylinder through behind the 2.5h, blocking agent is solidified, forms white solid.Add load and measure ultimate compression strength to solid surface, the entire compression intensity that records blocking agent is 0.35MPa.
Embodiment 12:
Get embodiment 9 described High Temperature Plugging Agent 50mL, placing volume is the stainless steel cylinder of 100mL, with the stainless steel cylinder sealing, places 200 ℃ of muffle furnaces.Open steel cylinder through behind the 3h, blocking agent is solidified, forms white solid.Add load and measure ultimate compression strength to solid surface, the entire compression intensity that records blocking agent is 0.50MPa.
Embodiment 13:
Get embodiment 3 described High Temperature Plugging Agent 50mL, placing volume is the stainless steel cylinder of 100mL, with the stainless steel cylinder sealing, places 100 ℃ of muffle furnaces.Open steel cylinder through behind the 5h, blocking agent is solidified, forms white solid.Add load and measure ultimate compression strength to solid surface, the entire compression intensity that records blocking agent is 0.25MPa.
Claims (7)
1. the water glass High Temperature Plugging Agent of the usefulness of recovering the oil, it is characterized in that, it is formed, and to count 30%～45% modulus by massfraction be 2.8～3.3 water glass, 0.5%～7.5% linking agent, 0～0.20% tensio-active agent, surplus are water, always consist of 100%, described linking agent is a kind of in acid amides, ester, the oxalic dialdehyde, and described tensio-active agent is an alkylphenol polyoxyethylene.
2. the water glass High Temperature Plugging Agent of a kind of usefulness of recovering the oil according to claim 1 is characterized in that described linking agent is an ester.
3. the water glass High Temperature Plugging Agent of a kind of usefulness of recovering the oil according to claim 2 is characterized in that, described ester is ethyl acetate or diethyl malonate, and described surfactant content is 0.
4. the water glass High Temperature Plugging Agent of a kind of usefulness of recovering the oil according to claim 2 is characterized in that, described ester is butylacetate or triacetin, and described tensio-active agent is 0.04%～0.20%.
5. the water glass High Temperature Plugging Agent of a kind of usefulness of recovering the oil according to claim 1 is characterized in that, described linking agent is methane amide or ethanamide or urea, and described surfactant content is 0.
6. the water glass High Temperature Plugging Agent of a kind of usefulness of recovering the oil according to claim 1 is characterized in that described linking agent is an oxalic dialdehyde, and described surfactant content is 0.
7. according to the water glass High Temperature Plugging Agent of claim 1 or 2 or 4 described a kind of usefulness of recovering the oil, it is characterized in that described tensio-active agent is a polyoxyethylene octylphenol ether.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410051435 CN1268713C (en) | 2004-09-13 | 2004-09-13 | Water glass high temperature blocking agent for oil production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410051435 CN1268713C (en) | 2004-09-13 | 2004-09-13 | Water glass high temperature blocking agent for oil production |
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| Publication Number | Publication Date |
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| CN1616590A CN1616590A (en) | 2005-05-18 |
| CN1268713C true CN1268713C (en) | 2006-08-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200410051435 Expired - Fee Related CN1268713C (en) | 2004-09-13 | 2004-09-13 | Water glass high temperature blocking agent for oil production |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101633835B (en) * | 2009-08-27 | 2012-02-01 | 中国石油化工股份有限公司 | Heavy oil thermal recovery fleeing proof agent |
| CN105156066B (en) * | 2015-07-14 | 2017-09-01 | 中国石油天然气股份有限公司 | Hydrated lime plugging method in-situ combustion exploitation process |
| CN107298968A (en) * | 2016-04-14 | 2017-10-27 | 中国石油化工股份有限公司 | A kind of haydite filling fractured well silicon urea formaldehyde sealing agent and its application process |
| CN106147732A (en) * | 2016-06-08 | 2016-11-23 | 中国石油集团川庆钻探工程有限公司长庆钻井总公司 | A kind of compound rapid hardening silicate leak stopping slurry and blocking method thereof |
| CN108131113B (en) * | 2017-12-01 | 2020-10-09 | 中国石油天然气股份有限公司 | Selective channeling sealing method for flooding production well of water-flooded oil reservoir |
| CN112852393B (en) * | 2019-11-28 | 2022-10-04 | 中国石油天然气股份有限公司 | High-temperature-resistant plugging agent for thick oil horizontal well and water plugging method |
| CN113122209B (en) * | 2020-01-15 | 2022-10-21 | 中国石油化工股份有限公司 | High-temperature-resistant deep profile control water shutoff agent and preparation and application method thereof |
| CN111454703A (en) * | 2020-04-08 | 2020-07-28 | 宁夏朔光石油科技有限公司 | Formula and using method of composite temporary plugging agent for temporary plugging acidification of horizontal well |
| CN112552890A (en) * | 2020-12-02 | 2021-03-26 | 中国石油化工股份有限公司 | Inorganic gel profile control plugging agent for steam huff and puff steam channeling well |
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