CN1415689A - High temp profile control agent and its preparation method as well as usage - Google Patents
High temp profile control agent and its preparation method as well as usage Download PDFInfo
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- CN1415689A CN1415689A CN 01134373 CN01134373A CN1415689A CN 1415689 A CN1415689 A CN 1415689A CN 01134373 CN01134373 CN 01134373 CN 01134373 A CN01134373 A CN 01134373A CN 1415689 A CN1415689 A CN 1415689A
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- profile control
- control agent
- formaldehyde
- high temp
- phenol
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Abstract
A high-temp blocking regulator for oil well is prepared from formaldehyde, phenol and sodium silicate through stirring formaldehyde with phenol and reaction between resultant mixture and aqueous solution of sodium silicate.
Description
The present invention relates to a kind of oilfield chemistry amendment and preparation method thereof, relate in particular to high temp profile control agent of hot hole and steamed well and preparation method thereof.
In the production process in oil field, well water can cause production cost to increase, and needs exploitation via steam injection in the viscous crude production, and along with the carrying out of recovery process, the steam of injection can be along a principal passage fingering.Remove shutoff steam and adjust the steam entry profile of steam on oil reservoir is vertical through high temp profile control agent commonly used, the normal high temp profile control agent of using has high-temperature foaming agent sulfonate, the gelling system that ligninsulfonate is crosslinked, but they exist plugging strength low relatively, need the shortcomings such as high temperature more than 100 ℃ when becoming glue, if and only use resin as high temp profile control agent, can make the cost of with medicament too high again, and heatproof neither be optimal.
The purpose of this invention is to provide a kind of glue reaction of can becoming in the time of stratum 40-60 ℃, have plugging strength preferably, heat resistance is good, and the relatively low high temp profile control agent of cost is used for the water blockoff of hot hole and steamed well and adjusts steam entry profile.
The present invention realizes by following mode, be prepared from high temp profile control agent with formaldehyde, phenol and water glass by chemical reaction, inject the stratum, under formation temperature 40-60 ℃ effect, react, form heat cured organic and inorganic composite resin, the underground most permeable zone of shutoff, the used formaldehyde and the mol ratio of phenol are 2.5-3.5: 1, the content of water glass is that 5-15% (weight) cooperates with water and forms.
The mol ratio of above-mentioned formaldehyde and phenol is preferably 2.8-3.2: 1, and the number that rubs of water glass is preferably elected 1.5-3.5, (mol ratio is the mol ratio of sodium dioxide in the water glass) as.
Above-mentioned high temp profile control agent is synthetic preparation as follows.
(a) take by weighing formaldehyde and phenol by an amount of mol ratio, 80% (weight) of getting the formaldehyde total amount mixes with whole phenol;
(b) the 2.5% ratio adding sodium hydroxide in formaldehyde, phenol gross weight stirs well;
(c) with above-mentioned mixed solution at 40-50 ℃ of following stirring reaction 30-40min;
(d) add sodium silicate aqueous solution, mixing stirs evenly, reacting by heating 30-40min;
(e) add 20% of formaldehyde total amount, be heated to 90 ℃, stirring reaction 30-40min.
Above-mentioned high temp profile control agent can be under 40-60 ℃, gelation time can be controlled at 8-72h, heat resistance can reach 7 days weight loss below 25% by senile experiment under 300 ℃ of high temperature, and the differential thermal analysis heatproof can reach 520 ℃, and cost is lower than simple with resin itself.Be applied to high-temperature oil well shutoff water outlet and steamed well and adjust the steam entry profile of steamed well, obtained tangible increase oil yield, reduce the steam entry profile of well water and adjustment steamed well.
Below by embodiment the present invention is described.Embodiment 1: take by weighing phenol 308g, heat 50-60 ℃, with its fusion and add sodium hydroxide 18 gram, under 40-50 ℃ of condition, stir 30-40min, be warmed up to 60 ℃ then, add formaldehyde 720g stirring reaction 30-40min, cool to 35 ℃, dripping water glass is 95 grams, the about 20min of constant temperature, add formaldehyde 190g then and be warming up to 90 ℃, isothermal reaction 30-40min has made high temp profile control agent of the present invention.
At 50 ℃ of following constant temperature of formation temperature, becoming the glue reaction is 45 hours, can obtain the solidified high temp profile control agent with above-mentioned stoste, is used for the shutoff well water and prevents that steam vapour from scurrying.Embodiment 2: with embodiment 1, get phenol 325g, and same formaldehyde amount and water glass amount, the modulus of water glass is 2.9, and the reaction times also together, also can obtain high temp profile control agent stoste of the present invention, and its one-tenth glue reaction times under 50 ℃ is 33 hours.
Claims (6)
1, a kind of high temp profile control agent is prepared from by formaldehyde, phenol, water glass, and wherein the mol ratio of formaldehyde and phenol is 2.5-3.5: 1, and water glass content is 5-15% (weight).
2, high temp profile control agent according to claim 1, the mol ratio of described formaldehyde and phenol are 2.8-3.2: 1.
3, high temp profile control agent according to claim 1, the modulus of described water glass are 1.5-3.5.
4, a kind of preparation method of high temp profile control agent comprises following steps:
(a) take by weighing formaldehyde and phenol by an amount of mol ratio, 80% (weight) of getting the formaldehyde total amount mixes with whole phenol;
(b) the 2.5% ratio adding sodium hydroxide in formaldehyde, phenol gross weight stirs well;
(c) with above-mentioned mixed solution at 40-50 ℃ of following stirring reaction 30-40min;
(d) add sodium silicate aqueous solution, mixing stirs evenly, reacting by heating 30-40min;
(e) add 20% of formaldehyde total amount, be heated to 90 ℃, stirring reaction 30-40min.
5, the high temp profile control agent of claim 1 is used for the pyrochemistry water blockoff application of oil well.
6, the high temp profile control agent of claim 1 is used for the high-temperature profile control application of steamed well.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011343737A CN1177015C (en) | 2001-11-02 | 2001-11-02 | High temp profile control agent and its preparation method as well as usage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011343737A CN1177015C (en) | 2001-11-02 | 2001-11-02 | High temp profile control agent and its preparation method as well as usage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1415689A true CN1415689A (en) | 2003-05-07 |
| CN1177015C CN1177015C (en) | 2004-11-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011343737A Expired - Fee Related CN1177015C (en) | 2001-11-02 | 2001-11-02 | High temp profile control agent and its preparation method as well as usage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1177015C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104140796A (en) * | 2013-09-06 | 2014-11-12 | 中国石油化工股份有限公司 | Plugging agent system suitable for low temperature oil reservoirs and preparation method thereof |
| CN112457835A (en) * | 2020-11-25 | 2021-03-09 | 成都理工大学 | High-temperature-resistant salt-resistant composite plugging agent |
-
2001
- 2001-11-02 CN CNB011343737A patent/CN1177015C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104140796A (en) * | 2013-09-06 | 2014-11-12 | 中国石油化工股份有限公司 | Plugging agent system suitable for low temperature oil reservoirs and preparation method thereof |
| CN104140796B (en) * | 2013-09-06 | 2017-02-22 | 中国石油化工股份有限公司 | Plugging agent system suitable for low temperature oil reservoirs and preparation method thereof |
| CN112457835A (en) * | 2020-11-25 | 2021-03-09 | 成都理工大学 | High-temperature-resistant salt-resistant composite plugging agent |
| CN112457835B (en) * | 2020-11-25 | 2022-06-03 | 成都理工大学 | High-temperature-resistant salt-resistant composite plugging agent |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1177015C (en) | 2004-11-24 |
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Granted publication date: 20041124 Termination date: 20201102 |
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| CF01 | Termination of patent right due to non-payment of annual fee |