CN103242813A - Gel curing solution and preparation method thereof - Google Patents
Gel curing solution and preparation method thereof Download PDFInfo
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- CN103242813A CN103242813A CN2013101442885A CN201310144288A CN103242813A CN 103242813 A CN103242813 A CN 103242813A CN 2013101442885 A CN2013101442885 A CN 2013101442885A CN 201310144288 A CN201310144288 A CN 201310144288A CN 103242813 A CN103242813 A CN 103242813A
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- solidification liquid
- gel solidification
- furnace slag
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Abstract
The invention discloses a gel curing solution and a preparation method thereof. The gel curing solution comprises blast furnace slag, an activating agent, a conditioning agent and water, wherein as the mass of the water is used as a reference, the masses of the blast furnace slag accounts for 40-60% of that of the water, the activating agent accounts for 1-3% of that of the water and the conditioning agent accounts for 3-6% of that of the water. The preparation method comprises the following steps: firstly dissolving the activating agent and the conditioning agent in the water; after the dissolution is completed, adding the blast furnace slag slowly; and then stirring at a high speed until the mixture is mixed uniformly. When the prepared gel curing solution is used for well cementing operation of a slim hole and a coal-seam gas well with low formation pressure or injection pressure, the cementing quality of two interfaces of a cemented well can be improved, thereby improving the interlayer sealing and isolating effect and preventing oil, gas and the water from moving with one another; and when the gel curing solution is used for drilling engineering leakage stopping construction and oil well water shut-off and profile control operation, the success rate of leakage stopping and the water shut-off and profile control operation can be greatly increased.
Description
Technical field
The invention belongs to oil, coal-seam gas field of engineering technology, be specifically related to a kind of gel solidification liquid and preparation method thereof.
Background technology
In the petroleum natural gas exploration drilling well, in well, be lowered to sleeve pipe and inject cement at the annular space of sleeve pipe and well, this process is called well cementation.Cement plane between sleeve pipe and the cement mantle is called well cementation one interface, and the cement plane between cement mantle and the stratum is called the well cementation second interface.In order to solve well cementation second interface Problem of Failure, the method that adopts is the performance that the development of new cement additire improves cement usually, to improve the cementing power of well cementation second interface now.But because grout and drilling fluid mud cake can not be realized integrally curing, and conventional grout easy volumetric shrinkage that takes place when solidifying, make to form micro-annulus, crack between cement and the mud cake, provide fluid-channeling channel to resident fluid, cause cementing quality to descend.
In addition in conventional mortar architecture, the residual drilling fluid self of the borehole wall can not solidify, drilling fluid mud cake and grout can not the integrally curing gluing together, the second interface that causes cementing the well lost efficacy, this is the major cause that " pregnant " well and " sugarcoated haws on a stick " well occur in the conventional cementing.And leak stopping water blockoff aspect, at present used plugging agent and the general plugging strength of plugging agent are not high, and success ratio is low, and validity period is short.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides a kind of gel solidification liquid that can effectively improve well cementation second interface bonding quality, it and grout, drilling fluid all have good consistency.
Gel solidification liquid provided by the invention is prepared from by the component of following weight part:
100 parts in water
40～60 parts of blast-furnace slags
1～3 part of activator
3～6 parts of conditioning agents.
Wherein, the blast-furnace slag activity is bigger, and the order number is between 600～1000, and proportion generally is not less than 1.6.
Activator is NaOH and Na
2CO
3Mixture, wherein NaOH accounts for 80%～93% of activator total mass.
Conditioning agent is the wherein mixture of two kinds of materials of a kind of or arbitrary ratio in sulfonated phenol formaldehyde resin, carboxymethyl cellulose, the carboxyethyl cellulose.
The preparation method of gel solidification liquid of the present invention is as follows:
1. with the fully dissolving in water of activator, conditioning agent;
2. slowly add blast-furnace slag under stirring at low speed, high-speed stirring is to even then.
Gel solidification liquid of the present invention mainly contains unbodied Si-O-Si, Si-O-Al, Al-O-Al, the OH in the alkali activator
-Ion makes Si-O-Si, Si-O-Al, the fracture of Al-O-Al covalent linkage.Ca in the slurry
2+, Al
3+Ion supersaturation, the SiO in the slurry simultaneously
4-, AlO
3-Under electrostatic interaction with Ca
2+Reaction generates low alkali gel, and gel experience nucleation-crystallization-nucleus growth-solidification process finally forms the silicate gel cured product.With OH
-The reaction of ion and Si-O-Si is example, hydration process as shown in the formula:
Gel solidification liquid provided by the present invention is used for the not high small hole of reservoir pressure or injection pressure, the cementing operation operation of coal bed gas well, can improve the bonding quality of well cementation second interface, thereby improves interlayer packing effect, prevents that oil gas water from scurrying mutually; When being used for drilling engineering blocking construction and oilwell water shutoff operation, because it has good anti-water enchroachment (invasion) ability, can improve the success ratio of leak stopping and water-blocking operation greatly.
Embodiment
Embodiment 1
6g activator, 18g conditioning agent are dissolved in the 600ml water, after treating fully to dissolve, slowly add the 300g blast-furnace slag under stirring at low speed, high-speed stirring is even to system then, namely makes gel solidification liquid of the present invention.
This gel solidification liquid is starched as the well cementation guide, try out in oil field, Fushan, Hainan flower Dong6-3XJing, this well major oil gas-bearing formation section is 3786.0m～3966.0m, record the most of well section of the 3786.0m～3997.5m sound width of cloth with CBL/VDL and be lower than 10%, acoustic variable-density reflection formation wave is more clear, first interface agglutination is good, the second contact surface strong bonding, and this section of total appraisal cementing quality is good.
Embodiment 2
With the 12g activator, the 34g conditioning agent is dissolved in the 600ml water, after treating fully to dissolve, slowly adds the 330g blast-furnace slag under stirring at low speed, and high-speed stirring is even to system then, namely makes gel solidification liquid of the present invention.
The obtained gel solidification liquid of the present invention is mixed with mud, grout respectively, test its rheological property, characterize the consistency of gel solidification liquid and mud, grout, data are as follows:
Table 1: the consistency experiment of gel solidification liquid and mud
As can be seen from Table 1, gel solidification liquid mixes the back rheological property with mud by different ratios and sudden change do not occur, and the mixture homogeneous is stable.As seen, gel solidification liquid system and mud have good consistency, have higher displacement efficiency for this system in the slurry process.Simultaneously, mud content is no more than 75%, and mixture slurry all has certain intensity.
Table 2: the consistency experiment of gel solidification liquid and grout
As can be seen from Table 2, gel solidification liquid is with after grout mixes, and rheological property is not sudden change also, and the mixture homogeneous is stable.As seen, gel solidification liquid system and grout have good consistency.Mixture slurry can both be cured as one with any ratio, forms certain intensity.
Embodiment 3
With the 6g activator, the 18g conditioning agent is dissolved in the 600ml water, after treating fully to dissolve, slowly adds the 300g blast-furnace slag under stirring at low speed, and high-speed stirring is even to system then, namely makes gel solidification liquid of the present invention.
Embodiment 4
With the 6g activator, the 36g conditioning agent is dissolved in the 600ml water, after treating fully to dissolve, slowly adds the 300g blast-furnace slag under stirring at low speed, and high-speed stirring is even to system then, namely makes gel solidification liquid of the present invention.
Respectively grout, embodiment 3 are made the mixture slurry of gel solidification liquid and grout, mixture slurry that embodiment 4 makes gel solidification liquid and grout is joined the slurry experiment in homogenizer, join the slurry back and dip a certain amount of mixture slurry with spoon, pour in the beaker that is filled with water, can find: grout scatter in water very soon, and gel solidification liquid and grout mixture slurry are column in water or bulk does not disperse, and illustrate that the anti-water enchroachment (invasion) performance of mixture slurry of gel solidification liquid and grout obviously is better than grout.
At present, gel solidification liquid system described in the embodiment 2-4 in grand celebration, tell the examination that oil recovery four factories of breathing out oil field and North China Oilfield have carried out aspect leak stopping and the water plugging and profile controlling and use, effect is good.
Claims (5)
1. gel solidification liquid, it is characterized in that: the component by following weight part is prepared from:
100 parts in water
40～60 parts of blast-furnace slags
1～3 part of activator
3～6 parts of conditioning agents.
2. gel solidification liquid according to claim 1 is characterized in that the granularity of described blast-furnace slag is 600～1000 orders.
3. gel solidification liquid according to claim 1 is characterized in that described activator is NaOH and Na
2CO
3Mixture, wherein NaOH accounts for 80%～93% of activator total mass.
4. gel solidification liquid according to claim 1 is characterized in that, described conditioning agent be a kind of in sulfonated phenol formaldehyde resin, carboxymethyl cellulose, the carboxyethyl cellulose or wherein two kinds of materials with the mixture of any ratio.
5. the preparation method of the described gel solidification liquid of claim 1 is characterized in that: earlier with the fully dissolving in water of activator, conditioning agent, after treating to dissolve fully, slowly add blast-furnace slag under stirring at low speed, high-speed stirring is to evenly then.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101442885A CN103242813A (en) | 2013-04-24 | 2013-04-24 | Gel curing solution and preparation method thereof |
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|---|---|---|---|
| CN2013101442885A CN103242813A (en) | 2013-04-24 | 2013-04-24 | Gel curing solution and preparation method thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105733534A (en) * | 2016-03-04 | 2016-07-06 | 中国石油集团渤海钻探工程有限公司 | Water-plugging gel cement slurry and preparation method thereof |
| CN106701049A (en) * | 2016-12-14 | 2017-05-24 | 中国石油天然气股份有限公司 | Micro-fine particle type horizontal well water shutoff agent composition and application thereof |
| CN106967403A (en) * | 2017-04-24 | 2017-07-21 | 东北石油大学 | A kind of oilfield reservoir macropore or special high permeable strip sealing agent and preparation method thereof |
| CN108410438A (en) * | 2018-04-16 | 2018-08-17 | 中国石油集团川庆钻探工程有限公司 | Drillable brittle gel partition working solution and preparation method thereof |
| CN110257027A (en) * | 2019-01-16 | 2019-09-20 | 胜利油田胜华实业有限责任公司 | A kind of drilling-cementing-integrated working fluid and its application method improving second interface bonding quality |
| CN110872499A (en) * | 2018-09-04 | 2020-03-10 | 中石化石油工程技术服务有限公司 | High-dehydration curing plugging agent, and preparation method and application thereof |
| CN113372899A (en) * | 2021-06-07 | 2021-09-10 | 西南石油大学 | Inorganic composite gel system |
| CN116396732A (en) * | 2023-05-29 | 2023-07-07 | 中石化西南石油工程有限公司 | Temperature-sensitive consolidation plugging agent and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102827593A (en) * | 2012-09-14 | 2012-12-19 | 中国石油大学(华东) | Deep-water well cementation cement paste system activated based on slag |
-
2013
- 2013-04-24 CN CN2013101442885A patent/CN103242813A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102827593A (en) * | 2012-09-14 | 2012-12-19 | 中国石油大学(华东) | Deep-water well cementation cement paste system activated based on slag |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105733534A (en) * | 2016-03-04 | 2016-07-06 | 中国石油集团渤海钻探工程有限公司 | Water-plugging gel cement slurry and preparation method thereof |
| CN106701049A (en) * | 2016-12-14 | 2017-05-24 | 中国石油天然气股份有限公司 | Micro-fine particle type horizontal well water shutoff agent composition and application thereof |
| CN106967403A (en) * | 2017-04-24 | 2017-07-21 | 东北石油大学 | A kind of oilfield reservoir macropore or special high permeable strip sealing agent and preparation method thereof |
| CN108410438A (en) * | 2018-04-16 | 2018-08-17 | 中国石油集团川庆钻探工程有限公司 | Drillable brittle gel partition working solution and preparation method thereof |
| CN110872499A (en) * | 2018-09-04 | 2020-03-10 | 中石化石油工程技术服务有限公司 | High-dehydration curing plugging agent, and preparation method and application thereof |
| CN110257027A (en) * | 2019-01-16 | 2019-09-20 | 胜利油田胜华实业有限责任公司 | A kind of drilling-cementing-integrated working fluid and its application method improving second interface bonding quality |
| CN113372899A (en) * | 2021-06-07 | 2021-09-10 | 西南石油大学 | Inorganic composite gel system |
| CN116396732A (en) * | 2023-05-29 | 2023-07-07 | 中石化西南石油工程有限公司 | Temperature-sensitive consolidation plugging agent and preparation method thereof |
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Application publication date: 20130814 |