CN1100130A - Sensitive oil accumulation acidizing fluid - Google Patents
Sensitive oil accumulation acidizing fluid Download PDFInfo
- Publication number
- CN1100130A CN1100130A CN 93117429 CN93117429A CN1100130A CN 1100130 A CN1100130 A CN 1100130A CN 93117429 CN93117429 CN 93117429 CN 93117429 A CN93117429 A CN 93117429A CN 1100130 A CN1100130 A CN 1100130A
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- CN
- China
- Prior art keywords
- acid
- concentration
- agent
- oil
- stratum
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B3/00—Engines characterised by air compression and subsequent fuel addition
- F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
Abstract
The acidizing liquid for sensitive oil accumulation includes prepad fluid containing diesel oil, hydrochloric acid and emulsion O/W and acid liquid contg. hydrochloric acid and hydrofluoric acid as main components, and features that such components are added to acid liquid as activating agent for changing the rock wettability, inhibitor for suppressing water sensitivity of stratum, chelating agent for suppressing acid sensitivity of stratum, subside-proofing agent and corrosion inhibitor for protecting equipment. Its effective rate is 83.33%.
Description
A kind of susceptibility oil reservoir acidifying acidification liquid that is used for.
Some hyposmosis at present, multiple cracking sandstone oil reservoir, it is higher all to contain a certain amount of mud, calcium powder sandstone, cementing matter content, is mainly shale and grey matter.Higher responsive mineral are contained in these areas simultaneously; kaolinite in the mineral; items such as montmorillonite are too high to be to produce the formation sensitivity major cause; the too high acid stimulation effect that has a strong impact on of responsive mineral quantity; because do not having under any sfgd. condition; acidification liquid enters the stratum, easily causes stratum swelling clay mineral, dispersion, migration, causes permeability plugging.The chlorite too high levels produces secondary sedimentation with acid in the construction process on the other hand, causes acidizing effect to descend, and validity period is short.Acidification liquid in Oilfield using does not have effect of increasing production to the susceptibility oil reservoir at present.
The invention provides a kind of above-mentioned defective that can overcome, be used for the acidification liquid of susceptibility oil reservoir.Can effectively suppress water-sensitive, fast quick, acid-sensitive, improve acidizing effect.
The present invention can realize by following measure:
This acidification liquid is made up of spearhead and acid solution main body two portions, is added with organic solvent diesel oil in the spearhead, hydrochloric acid and O/W emulsion.The acid solution main body is made up of hydrochloric acid and hydrofluoric acid, and is added with the promoting agent that is used for changing rock wettability, is used for suppressing stratum water-sensitive, quick, the acid-sensitive inhibitor of speed, is used for protecting the inhibiter of oil recovery, preparation of construction.
Added promoting agent is 8908 in the acidification agent, and its concentration is between 0.05-5%, and added inhibition water-sensitive, quick, the acid-sensitive inhibitor of speed are Bj-1, and its concentration is between 0.2-1.5%, and added sequestrant is HAC, and its concentration is 1%; Added anti-settling agent is DP-1, and its concentration is between 0.10-0.25, and added inhibiter is S-3, its concentration 0.5%.
The blending process of this treatment agent is fairly simple, and the preparation of spearhead is with needed diesel oil, and hydrochloric acid and concentration are that Emulsifier O/W mixing and stirring of 0.1% gets final product.The preparation of acid solution main body is that 10% hydrochloric acid, 3% hydrofluoric acid add the promoting agent 8908 that concentration is 0.05-0.5%, concentration is the inhibitor B j-1 of 0.2-1.5%, concentration is 1% sequestrant, concentration is the anti-settling agent of 0.10-0.25%, concentration is 0.5% inhibiter S-3, and adding stirs after the cleaning water gets final product.
Adopt this treatment agent that the susceptibility oil reservoir is carried out acidification, have positive effect.The spearhead of this treatment agent be with the organic stifled stronger organic solvent diesel oil of molten mistake, with clean-out system ss-25 as in the O/W emulsion mutually, with hydrochloric acid as the foreign minister, after it is pumped into the stratum, through certain temperature, breakdown of emulsion after the time, mistake organic deposition that mixes in it cleans the stratum, and the mistake inorganic scale mixes outward, reduce the stratum pH value, prevent that secondary sedimentation from generating.
Add hydrofluoric acid as the acid solution main body with hydrochloric acid, under reservoir condition, can reach 28.4%, and can remove the injury that mud and mechanical impurity cause the sandstone dissolve-loss ratio.
Add stablizer Bj-1 and can suppress the formation particles expansion, anti-swollen leak-off rate is lower than 48%,, goes into larger particles the obstruction duct because stablizer makes its particle be difficult for assembling in the particle surface adsorption.
But sequestrant adds F in the chelating chlorite
3+Ion prevents colloidal state (OH)
3Precipitation generates, and anti-settling agent uses and reduced in the acid solution precipitation mutually such as Sodium Silicofluoride on the other hand, plays and suppresses the acid-sensitive purpose of mineral.
Use 8908 mutual solvents, can improve permeability to oil after the acidifying.When 8908 concentration are 0.5%, rock core water wetting angle is spent by 95 reduced to 26.7 degree, it is wetting to increase water, improves permeability to oil, prevents colloid in acid and the crude oil, and bituminous matter forms acid sludge, and has certain demulsification, increases acid and crude oil compatibleness.
Use S-3 inhibiter corrosion speed to drop to 1.028mm/y by blank 96.06mm/y, corrosion mitigating effect reaches more than 98%.
Carry out permeability variation at the lab simulation formation condition and measure, rate of permeation can improve more than three times.Test in place 12 wells, efficient 83.33%.This can reach input-output more than 1: 4.
Claims (4)
1, a kind of oil and water well acidifying treatment agent that is used for is by containing diesel oil, hydrochloric acid as spearhead, be made up of as the acid solution of main body hydrochloric acid and hydrofluoric acid, it is characterized in that:
A, be added with Emulsifier O/W in spearhead, its concentration is 0.1%;
B, be added with the promoting agent that is used for changing rock wettability in the acid solution main body, its concentration is between 0.05--0.5%; Suppress the inhibitor of stratum water sensitivity, fast quick property, its concentration is between 0.2--1.5%; Suppress acid-sensitive sequestrant, the anti-settling agent in stratum, its concentration is respectively 1%, 0.10--0.25%; Protection is recovered the oil, the inhibiter of preparation of construction, and its concentration is between 0.5--1.5%.
2, acidification agent according to claim 1 is characterized in that promoting agent is 8908, can reduce rock core water wetting angle, improves permeability to oil.
3, acidification agent according to claim 1, it is characterized in that suppressing water-sensitive, speed quick inhibitor be Bj-1, can suppress the rock core grain expansion.
4, acidification liquid according to claim 1 is characterized in that inhibiter is S-3, can reduce corrosion speed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93117429 CN1100130A (en) | 1993-09-09 | 1993-09-09 | Sensitive oil accumulation acidizing fluid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93117429 CN1100130A (en) | 1993-09-09 | 1993-09-09 | Sensitive oil accumulation acidizing fluid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1100130A true CN1100130A (en) | 1995-03-15 |
Family
ID=4992002
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93117429 Pending CN1100130A (en) | 1993-09-09 | 1993-09-09 | Sensitive oil accumulation acidizing fluid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1100130A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1116497C (en) * | 1999-02-10 | 2003-07-30 | 王素君 | Sandstone acid |
| 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 |
| CN100366702C (en) * | 2005-10-18 | 2008-02-06 | 中国石油大学(华东) | High temperature proof acid-in-oil emulsion in low friction resistance |
| CN102953718A (en) * | 2011-08-23 | 2013-03-06 | 中国石油化工股份有限公司 | Composite alternative acid dissolving method of hyposmosis oil layer |
| CN104295275A (en) * | 2013-07-17 | 2015-01-21 | 中国石油化工股份有限公司 | Deep blockage removal and injection increase method for water injection well of medium-and-high-permeability sandstone reservoir |
| CN105275438A (en) * | 2014-12-28 | 2016-01-27 | 新疆科力新技术发展有限公司 | Sensitivity reservoir swelling prevention elimination technology |
| CN107142095A (en) * | 2017-05-17 | 2017-09-08 | 成都百联油田技术服务有限公司 | A kind of de-plugging agent and preparation method thereof |
| CN108822819A (en) * | 2018-06-14 | 2018-11-16 | 兰州凯宏中原石油科技有限公司 | A kind of super low percolation oilfield oil-water well combined removing plug by acid liquid |
-
1993
- 1993-09-09 CN CN 93117429 patent/CN1100130A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1116497C (en) * | 1999-02-10 | 2003-07-30 | 王素君 | Sandstone acid |
| 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 |
| CN100366702C (en) * | 2005-10-18 | 2008-02-06 | 中国石油大学(华东) | High temperature proof acid-in-oil emulsion in low friction resistance |
| CN102953718A (en) * | 2011-08-23 | 2013-03-06 | 中国石油化工股份有限公司 | Composite alternative acid dissolving method of hyposmosis oil layer |
| CN102953718B (en) * | 2011-08-23 | 2015-03-25 | 中国石油化工股份有限公司 | Composite alternative acid dissolving method of hyposmosis oil layer |
| CN104295275A (en) * | 2013-07-17 | 2015-01-21 | 中国石油化工股份有限公司 | Deep blockage removal and injection increase method for water injection well of medium-and-high-permeability sandstone reservoir |
| CN105275438A (en) * | 2014-12-28 | 2016-01-27 | 新疆科力新技术发展有限公司 | Sensitivity reservoir swelling prevention elimination technology |
| CN105275438B (en) * | 2014-12-28 | 2017-12-19 | 新疆科力新技术发展股份有限公司 | The anti-technology that disappears of sensitive reservoir expansion |
| CN107142095A (en) * | 2017-05-17 | 2017-09-08 | 成都百联油田技术服务有限公司 | A kind of de-plugging agent and preparation method thereof |
| CN107142095B (en) * | 2017-05-17 | 2020-04-24 | 成都百联油田技术服务有限公司 | Blocking remover and preparation method thereof |
| CN108822819A (en) * | 2018-06-14 | 2018-11-16 | 兰州凯宏中原石油科技有限公司 | A kind of super low percolation oilfield oil-water well combined removing plug by acid liquid |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |