CN1208755A - Method for prepn. of composite, high efficiency and active acid for de-plugging of well - Google Patents
Method for prepn. of composite, high efficiency and active acid for de-plugging of well Download PDFInfo
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- CN1208755A CN1208755A CN 98114160 CN98114160A CN1208755A CN 1208755 A CN1208755 A CN 1208755A CN 98114160 CN98114160 CN 98114160 CN 98114160 A CN98114160 A CN 98114160A CN 1208755 A CN1208755 A CN 1208755A
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Abstract
A complex active acid for deblocking oil well is prepared through compounding and mixing under normal temp. and pressure of polyoxyethylene isobutyl phenol ether, ethylene glycol monobutyl ether, light oil, formaldehyde water, acetic acid, hydrochloric acid, hydrofluoric acid, phosphoric acid and water. The prepation method is simple in technology and is easy to implement. The prepared active acid not only can relieve the oil layer blocking caused by inorganic scale such as drilling slurry, clay mineral, etc., but also can relieve organic scale caused by colloid, asphalt, paraffin, etc..
Description
The present invention relates to a kind of particularly preparation method of the composite, high efficiency and active acid of the heavy oil wells de-plugging of exploitation via steam injection of de-plugging of well that is used for.
Oil well is in drilling well and production process, and the inorganic scale of formation such as the expansion of the pollution of drilling fluid and oil reservoir CLAY MINERALS AND THEIR SIGNIFICANCE, dispersion, migration can cause oil layer blocking.On the other hand, in recovery process, because reservoir temperature, pressure descend, the colloid in the crude oil, bituminous matter, wax are separated out and the organic deposition that forms, also can cause or aggravate oil layer blocking, and particularly this problem is particularly outstanding in viscous crude, high-solidifiability oil well.Can cause oil well output to reduce when oil layer blocking is serious even stopping production.For a long time, on-the-spot de-plugging measure routinely such as adopt that acidifying, heat are washed mostly, these measure effects are single, and limitation is big, to stopping up serious well DeGrain even invalid.So far, the on-the-spot chemical plugging removal agent effect of using is still not ideal enough.
The object of the present invention is to provide a kind of oil reservoir inorganic scale of can removing also can remove composite, high efficiency and active acid of organic deposition obstruction (being integrative blockage relieving) and preparation method thereof.
Task of the present invention is to realize like this.Composite, high efficiency and active acid provided by the invention is to adopt the number of chemical agent to stir composite forming under normal temperature and pressure conditions.(weight %) is as follows for the component of this kind composite, high efficiency and active acid and proportioning:
Polyoxyethylene isobutyl-phenolic ether 1.5
Ethylene glycol monobutyl ether 5
Lightweight oil 10--20
Formalin 15
Acetic acid 1.5
Hydrochloric acid 7.5
Hydrofluoric acid 2
Phosphoric acid 3.5
All the other are water
The preparation of this active acid is carried out according to the following steps:
1, calculates the consumption of each component by ratio requirement;
2, in the dosing pond, add the true quantitative water of calculating;
3, under condition of stirring, add respectively and calculate true quantitative polyoxyethylene isobutyl-phenolic ether and ethylene glycol monobutyl ether;
4, stir after, add true quantitative lightweight oil, formalin and acetic acid;
5, after abundant the stirring, add true quantitative hydrochloric acid, hydrofluoric acid and phosphoric acid respectively;
6, after circulation is stirred, just can obtain composite, high efficiency and active acid liquid.
Process for preparation carries out at normal temperatures and pressures, add various chemical agents according to above-mentioned sequencing.
Active acid preparation method's technology provided by the invention is simple, easy to implement, use the composite, high efficiency and active acid of this method preparation and not only can remove the oil layer blocking that inorganic scales such as drilling mud, clay mineral cause, can also remove the obstruction that organic depositions such as colloid, bituminous matter, paraffin cause, and can play deep acidizing and improve good action such as rock wettability.This kind unblocking agent is used for particularly heavy oil wells de-plugging of oil well, can obtain good effect of increasing production.
Embodiment 1: prepare 10 tons of composite, high efficiency and active acid liquid that are used for the heavy oil wells de-plugging.Implementation step is as follows:
Each amounts of components is determined in a, calculating, and the result is as follows:
1.5% 0.15 ton of polyoxyethylene isobutyl-phenolic ether
5% 0.5 tons of ethylene glycol monobutyl ethers
20% 2 tons of lightweight oils
15% 1.5 tons of formalin
1.5% 0.15 ton of acetic acid
7.5% 2.5 tons of hydrochloric acid (concentration 30%)
2% 0.5 tons in hydrofluoric acid (concentration 40%)
3.5% 0.44 ton of phosphoric acid (concentration 80%)
2.26 tons in water
B, in the dosing pond, add 2.26 tons of water;
C, under condition of stirring, add 0.15 ton of polyoxyethylene isobutyl-phenolic ether and 0.5 ton of ethylene glycol monobutyl ether respectively;
D, stir after, add 2 tons of lightweight oils, 1.5 tons of formalin and 0.15 ton of acetic acid;
After e, the abundant stirring, add 2.5 tons of technical hydrochloric acids (concentration 30%), 0.5 ton of industrial hydrofluoric acid (concentration 40%) and 0.44 ton of industrial phosphoric acid (concentration 80%) respectively;
After f, circulation are stirred, obtain 10 tons of composite, high efficiency and active acids.
Embodiment 2: prepare 10 tons of composite, high efficiency and active acids that are used for the de-plugging of thin oil well.Implement by the step identical with example 1, in each amounts of components, the lightweight oil proportioning gets 10%, and consumption is 1 ton, and the consumption of water is 3.26 tons, and other are all identical, can obtain the acid solution of requirement.
Claims (1)
1, a kind of preparation method of composite, high efficiency and active acid for de-plugging of well is characterized in that: this kind composite, high efficiency and active acid is to adopt the number of chemical agent to stir composite forming under normal temperature and pressure conditions; (weight %) is as follows for the component of this kind active acid and proportioning:
Polyoxyethylene isobutyl-phenolic ether 1.5
Ethylene glycol monobutyl ether 5
Lightweight oil 10--20
Formalin 15
Acetic acid 1.5
Hydrochloric acid 7.5
Hydrofluoric acid 2
Phosphoric acid 3.5
All the other are water
The preparation of this active acid is carried out according to the following steps:
1, calculates the consumption of each component by ratio requirement;
2, in the dosing pond, add the true quantitative water of calculating;
3, under condition of stirring, add respectively and calculate true quantitative polyoxyethylene isobutyl-phenolic ether and ethylene glycol monobutyl ether;
4, stir after, add true quantitative lightweight oil, formalin and acetic acid;
5, after abundant the stirring, add true quantitative hydrochloric acid, hydrofluoric acid and phosphoric acid respectively;
6, after circulation is stirred, just can obtain composite, high efficiency and active acid liquid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98114160 CN1072701C (en) | 1998-07-15 | 1998-07-15 | Method for prepn. of composite, high efficiency and active acid for de-plugging of well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98114160 CN1072701C (en) | 1998-07-15 | 1998-07-15 | Method for prepn. of composite, high efficiency and active acid for de-plugging of well |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1208755A true CN1208755A (en) | 1999-02-24 |
| CN1072701C CN1072701C (en) | 2001-10-10 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98114160 Expired - Fee Related CN1072701C (en) | 1998-07-15 | 1998-07-15 | Method for prepn. of composite, high efficiency and active acid for de-plugging of well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1072701C (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1303183C (en) * | 2004-07-12 | 2007-03-07 | 中国石油化工股份有限公司 | Acidizing fluid for oil well |
| CN1329476C (en) * | 2004-09-24 | 2007-08-01 | 中国石油化工股份有限公司 | Acidification composition for oil well |
| CN100352884C (en) * | 2004-09-24 | 2007-12-05 | 中国石油化工股份有限公司 | Oil well acidification composition |
| CN103555307A (en) * | 2013-11-14 | 2014-02-05 | 中国石油化工股份有限公司 | Blocking remover for oil extraction |
| CN105018060A (en) * | 2015-07-07 | 2015-11-04 | 西南石油大学 | Agent for preventing and eliminating condensate gas well water block and retrograde condensation, and preparation and application methods thereof |
| CN105505359A (en) * | 2016-02-02 | 2016-04-20 | 辛集市远翔环保能源科技有限公司 | Blockage removing agent for oil well |
| CN110129018A (en) * | 2019-05-07 | 2019-08-16 | 中国海洋石油集团有限公司 | A kind of non-acid deblocking agent and preparation method thereof for heavy oil wells |
| CN110529084A (en) * | 2019-07-31 | 2019-12-03 | 中国海洋石油集团有限公司 | A kind of hypertonic sandstone reservoir long well section steering distributary acid method |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101362942B (en) * | 2008-09-26 | 2011-09-28 | 大庆石油管理局 | Formation opener agent for low permeable reservoir of oilfield |
| CN101434834B (en) * | 2008-12-08 | 2010-10-06 | 辽河石油勘探局 | Integrative blockage relieving agent for uranium deposit ore bed |
-
1998
- 1998-07-15 CN CN 98114160 patent/CN1072701C/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1303183C (en) * | 2004-07-12 | 2007-03-07 | 中国石油化工股份有限公司 | Acidizing fluid for oil well |
| CN1329476C (en) * | 2004-09-24 | 2007-08-01 | 中国石油化工股份有限公司 | Acidification composition for oil well |
| CN100352884C (en) * | 2004-09-24 | 2007-12-05 | 中国石油化工股份有限公司 | Oil well acidification composition |
| CN103555307A (en) * | 2013-11-14 | 2014-02-05 | 中国石油化工股份有限公司 | Blocking remover for oil extraction |
| CN105018060A (en) * | 2015-07-07 | 2015-11-04 | 西南石油大学 | Agent for preventing and eliminating condensate gas well water block and retrograde condensation, and preparation and application methods thereof |
| CN105505359A (en) * | 2016-02-02 | 2016-04-20 | 辛集市远翔环保能源科技有限公司 | Blockage removing agent for oil well |
| CN110129018A (en) * | 2019-05-07 | 2019-08-16 | 中国海洋石油集团有限公司 | A kind of non-acid deblocking agent and preparation method thereof for heavy oil wells |
| CN110529084A (en) * | 2019-07-31 | 2019-12-03 | 中国海洋石油集团有限公司 | A kind of hypertonic sandstone reservoir long well section steering distributary acid method |
| CN110529084B (en) * | 2019-07-31 | 2021-11-02 | 中国海洋石油集团有限公司 | Long well section steering, shunting and acidizing method for high-permeability sandstone reservoir |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1072701C (en) | 2001-10-10 |
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