CN102775980B - Acidizing block remover suitable for complex lithologic reservoir - Google Patents
Acidizing block remover suitable for complex lithologic reservoir Download PDFInfo
- Publication number
- CN102775980B CN102775980B CN201210246707.1A CN201210246707A CN102775980B CN 102775980 B CN102775980 B CN 102775980B CN 201210246707 A CN201210246707 A CN 201210246707A CN 102775980 B CN102775980 B CN 102775980B
- Authority
- CN
- China
- Prior art keywords
- acid
- acidizing
- reservoir
- water
- complex
- 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.)
- Active
Links
Abstract
The invention relates to an acidizing block remover suitable for a complex lithologic reservoir. The acidizing block remover suitable for the complex lithologic reservoir comprises the following components by weight: 0-12% of hydrochloric acid, 0-3% of ammonium bifluoride, 0-10% of sulfamic acid, 0-5% of fluoboric acid, 0-3% of boric acid, 0-4% of alcohol, 0-2% of triethanolamine, 3% of glacial acetic acid, 4.0-6.0% of corrosion inhibitor, 2.0-4.0% of mutual solvent, 0.5-1.0% of penetrating agent, 2.0% of clay stabilizer and 45-88.5% of water. The problems that the lithologic and physical property differences of oil fields are large, the oil fields are in staggered distribution, and the acidizing debugging construction effect of a common water injection well is not ideal are mainly solved. The acidizing block remover suitable for the complex lithologic reservoir can effectively corrode the strata minerals and obstruent, does not destroy a rock skeleton, can prevent secondary precipitation caused by sensitive mineral, improves the water absorbing capacity of the reservoir, and increases the daily increasing water injection rate of an average single-well measure.
Description
Technical field:
The present invention relates to a kind of unblocking agent, especially one in oil extraction in oil field field and be applicable to complex lithology reservoir acidification blocking remover.
Background technology:
" injecting enough water, injecting good water " directly determining Development Response of Oilfield.For the water injection well of difficult water injection, oil field generally adopts acidification to dispel block measure, in water injection well, injects acidification blocking remover, dissolves tamper, and dredging reservoir pore space improves reservoir water-retaining capacity thereby realize.And it is poor for reservoir properties, shale index is high, lithology, clay mineral content differ greatly, the unconspicuous this oil field of clay mineral regularity of distribution complex lithology block, such as the block reservoir for point two sections, top series of strata porosity, rate of permeation are all lower, and in clay mineral, illite/smectite mixed layer and biotite content are higher, and water-sensitive and acid-sensitive easily occurs; Bottom series of strata porosity, rate of permeation are higher, and in clay mineral, kaolinite content increases gradually, speed easily occur quick and acid-sensitive; Oil reservoir travertine and clay mineral content are higher, cause reservoir loose cementation, water-sensitive, fast quick serious in the injecting process, reservoir difficult water injection.Therefore due to this complex lithology block, lithology, physical difference are larger, and are interspersed, and have brought great difficulty to acidizing treatment.Use the common acidizing fluid of conventional waterflood well acidizing unblocking agent, augmented injection effect is undesirable, is keeping under original water injection pressure, and average individual well day augmented injection only has 5.0m
3.
Summary of the invention:
The invention reside in and overcome the large and undesirable problem of use conventional waterflood well acidizing de-plugging construction effect that is interspersed for oil field lithology, physical difference existing in background technology, and provide one to be applicable to complex lithology reservoir acidification blocking remover, this is applicable to complex lithology reservoir acidification blocking remover and has formed the stronger serial acid fluid system of specific aim, i.e. effectively corrosion stratum mineral and tamper, do not destroy again rock stratum skeleton, can prevent the secondary sedimentation that sensitive minerals causes to generate, improve oil reservoir water-retaining capacity.
The present invention solves its problem and can reach by following technical solution: this is applicable to complex lithology reservoir acidification blocking remover, its component and proportioning are as follows by weight percentage: hydrochloric acid 0～12%, ammonium bifluoride 0%～3%, thionamic acid 0%-10%, fluoroboric acid 0%～5%, boric acid 0%-3%, ethanol 0～4%, trolamine 0～2%, Glacial acetic acid 3%, inhibiter 4.0～6.0%, mutual solvent 2.0～4.0%, permeate agent 0.5～1.0%, clay stabilizer 2.0%, water 45～88.5%.。
Described hydrochloric acid 10～12%, ammonium bifluoride 1%～3%, thionamic acid 8%-10%, fluoroboric acid 3%～5%, boric acid 2%-3%, ethanol 2～4%, trolamine 1～2%, Glacial acetic acid 3%, inhibiter 4.0～6.0%, mutual solvent 2.0～4.0%, permeate agent 0.5～1.0%, clay stabilizer 2.0%, water 45～61.5%.
In described acidification to dispel block agent prescription, also comprise citric acid 0.5～1.0%, powder nitric acid 5～7%.
Described mutual solvent is ethylene glycol monobutyl ether; Permeate agent is nonionogenic tenside alkylphenol polyoxyethylene; Clay stabilizer is for to be formed by 2:1 is composite by 3-chlorine-2-hydroxyl oxypropyl trimethyl ammonium chloride and ammonium chloride.。
Described inhibiter is formed by 1:2:1 is composite by hexamethylenetetramine, formaldehyde and thiocarbamide.
Complex lithology acidification blocking remover of the present invention is loose mainly for oilfield reservoir, the high feature of shale index, has studied by multiple acid solution and has been applicable to the Compound-acid liquid system that strong quick property reservoir additive forms.In main acid system, the Main Function of hydrochloric acid is the pH value that keeps lower, prevents secondary precipitate, and another Main Function promotes hydrofluoric acid to generate and reacts with sandstone mineral.Ammonium bifluoride, fluoroboric acid and boric acid are under hydrochloric acid effect, generate the hydrofluoric acid of low concentration, dissolve formation pore medium clay soil, this acid fluid system has overcome the cementing of the corrosion ability destructible rock that regular mud acid reaction is fast, operating distance is short and higher in stratum.Meanwhile, because this acid fluid system has low reaction activity, penetrable to depths, stratum, and can avoid fine migration.Thionamic acid is organic acid, has dirt grain effect in the formation pore of dissolving.The effect of ethanol is to reduce sour rock speed of response, and the effect of a speed of response delaying is provided.Glacial acetic acid has delayed the generation of sial dirt by cushioning effect and chelate effect.Trolamine is by Fe
3+complexing, prevents from, after acidifying, iron precipitation and permeability reduction to occur.
The complex lithology acidification blocking remover mechanism of action of the present invention be dissolve stop up or bridging plug in the pollution in matrix pores duct, stratum, recover prime stratum rate of permeation.This system is made up of mineral acid, organic acid and acid additive.When acid solution enters behind stratum, first mineral acid reacts with the mineral in stratum, has suppressed organic acid ionization, and organic acid slowly ionizes, thereby makes this acid system all the time among larger activity, reaches the object of slow and deep acidifying.In addition, this acid system can be separated the organic contamination of paraffin removal, pitch, mushroom formation.
The present invention compares and can have following beneficial effect with above-mentioned background technology: this is applicable to complex lithology reservoir acidification blocking remover, i.e. effectively corrosion stratum mineral and tamper, do not destroy again rock stratum skeleton, can prevent the secondary sedimentation that sensitive minerals causes to generate, prevent swelling clay mineral and particle migration, can prevent stratum emulsification simultaneously, strengthen the wettability on stratum, guarantee acidizing effect, improve oil reservoir water-retaining capacity, increase the average single well measure water injection rate that increases day by day.Average individual well water injection pressure decline 1.5MPa after application the present invention, average individual well day augmented injection 13.5m
3.
Embodiment:
Below in conjunction with specific embodiment, the invention will be further described:
Following embodiment mutual solvent used is ethylene glycol monobutyl ether; Permeate agent is nonionogenic tenside alkylphenol polyoxyethylene; Clay stabilizer is for to be formed by 2:1 is composite by 3-chlorine-2-hydroxyl oxypropyl trimethyl ammonium chloride and ammonium chloride; Inhibiter is formed by 1:2:1 is composite by hexamethylenetetramine, formaldehyde and thiocarbamide.
Embodiment 1:
Take hydrochloric acid 10g, ammonium bifluoride 1g, boric acid 2g, Glacial acetic acid 3g, inhibiter 4.0g, mutual solvent ethylene glycol monobutyl ether 2.0g, permeate agent alkylphenol polyoxyethylene 0.5g, clay stabilizer 2.0g and water 75.5g and be hybridly prepared into acidification blocking remover.
This acidification blocking remover is applicable to the acidification to dispel block agent prescription of the anti-water-sensitive Compound-acid of low injury liquid system.This acid fluid system feature is to be effective corrosion stratum mineral and tamper, do not destroy again rock stratum skeleton, can prevent the secondary sedimentation that sensitive minerals causes to generate, prevent swelling clay mineral and particle migration, can prevent stratum emulsification, strengthen the wettability on stratum, guarantee acidizing effect simultaneously.
Embodiment 2:
Take thionamic acid 8g, ammonium bifluoride 2g, citric acid 0.5g, inhibiter 4.0g, mutual solvent 2.0g, permeate agent 0.5g, clay stabilizer 2.0g and water 81.0g and be hybridly prepared into acidification blocking remover.
This acidification blocking remover is applicable to easily occur the acid-sensitive series of strata of hydrochloric acid.
Embodiment 3:
Take hydrochloric acid 10g, fluoroboric acid 3g, ethanol 2g, trolamine 1g, inhibiter 4.0g, mutual solvent 2.0g, permeate agent 0.5g, clay stabilizer 3.0g and water 74.5g and be hybridly prepared into acidification blocking remover.
This acidification blocking remover is applicable to Xing'an Mountains group containing the low injury of travertine reservoir, anti-swollen and anti-migration type Compound-acid liquid system.This acid fluid system feature is higher for Xing'an Mountains oil reservoir montmorillonite and travertine content, there is the dual water-sensitive characteristic of water-swellable and clay movement, ensureing effective corrosion stratum mineral and tamper, can prevent swelling clay mineral and particle migration, meet such Reservoir Acidization needs.
Embodiment 4:
Take hydrochloric acid 3g, powder nitric acid 5g, Glacial acetic acid 3g, inhibiter 4.0g, mutual solvent 2.0g, permeate agent 0.5g, clay stabilizer 2.0g and water 80.5g and be hybridly prepared into acidification blocking remover.This acidification blocking remover is applicable to easily occur the acid-sensitive series of strata of mud acid.
This acidification blocking remover performance evaluation:
(1) effectively corrosion stratum mineral and tamper, does not destroy again rock stratum skeleton, acidification blocking remover test oil field block landwaste corrosion experimental data table prepared by the formula that table 1 is Application Example 2-4.
Table 1 oil field block landwaste corrosion experimental data table
(2) can prevent the secondary sedimentation that sensitive minerals causes to generate, prevent swelling clay mineral and particle migration, can prevent stratum emulsification simultaneously, strengthen the wettability on stratum, guarantee acidizing effect, the acid solution over-all properties table of this acidification blocking remover of table 2.
Table 2 acid solution over-all properties table
| Secondary sedimentation | Demulsification efficiency (%) | Interfacial tension (mN/m) | Erosion rate (g/m 3.h） |
| PH=6.5 is without precipitation | 15min/≥95% | 1.0～2.0 | <1.0 |
(3) rock core displacement test data show, can effectively improve drill core permeability rate, meet oil field different blocks acidizing treatment needs, the rock core displacement test data of the acidification blocking remover that table 3 is prepared for application formula 2-4.
Table 3 rock core displacement test data
Use acidification blocking remover of the present invention to carry out site operation to 25 intervals of 12 mouthfuls of wells of Hailaer Oilfield Hailaer particular lithologic reservoir different blocks, with sour total amount 1362m
3, acidization of sandstone thickness 289m, acid amount 4.71m for average unit thickness
3/ m.After 12 mouthfuls of well measures of acidifying, all see augmented injection effect, complete injection allocation after wherein having 10 mouthfuls of well measures.Add up 12 mouthfuls of wells, average individual well water injection pressure decline 1.5MPa, average individual well day augmented injection 13.5m
3, add up at present augmented injection 2022m
3.Table 4 is Hailaer Oilfield application acidification blocking remover acidifying of the present invention service shaft statistical effect table in 2011.Table 5 is that Hailaer Oilfield adopts common acidifying construction effect table.
Table 4 Hailaer Oilfield acidifying service shaft statistical effect table in 2011
The common acidifying construction effect of table 5 Hailaer Oilfield table
Claims (1)
1. one kind is applicable to complex lithology reservoir acidification blocking remover, its component and proportioning are as follows by weight percentage: described hydrochloric acid 10～12%, ammonium bifluoride 1%～3%, thionamic acid 8%～10%, fluoroboric acid 3%～5%, boric acid 2%～3%, ethanol 2～4%, trolamine 1～2%, Glacial acetic acid 3%, inhibiter 4.0～6.0%, mutual solvent 2.0～4.0%, permeate agent 0.5～1.0%, clay stabilizer 2.0%, water 45～61.5%; Described mutual solvent is ethylene glycol monobutyl ether; Permeate agent is nonionogenic tenside alkylphenol polyoxyethylene; Clay stabilizer is for to be formed by 2:1 is composite by 3-chlorine-2-hydroxyl oxypropyl trimethyl ammonium chloride and ammonium chloride; Described inhibiter is formed by 1:2:1 is composite by hexamethylenetetramine, formaldehyde and thiocarbamide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210246707.1A CN102775980B (en) | 2012-07-17 | 2012-07-17 | Acidizing block remover suitable for complex lithologic reservoir |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210246707.1A CN102775980B (en) | 2012-07-17 | 2012-07-17 | Acidizing block remover suitable for complex lithologic reservoir |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102775980A CN102775980A (en) | 2012-11-14 |
| CN102775980B true CN102775980B (en) | 2014-07-02 |
Family
ID=47121093
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210246707.1A Active CN102775980B (en) | 2012-07-17 | 2012-07-17 | Acidizing block remover suitable for complex lithologic reservoir |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102775980B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108373911A (en) * | 2018-04-18 | 2018-08-07 | 河北峻极化工科技有限公司 | Blockages relieving fluid and preparation method thereof is chelated applied to middle and high infiltration sandstone reservoir |
Families Citing this family (34)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103484088B (en) * | 2013-09-06 | 2016-02-03 | 廊坊中石油科学技术研究院 | A kind of unblocking agent and acidification to dispel block method being applicable to complex lithology reservoir acidifying |
| CN103881674B (en) * | 2013-10-18 | 2016-06-01 | 中国石油化工股份有限公司 | A kind of note poly-blocking well slug combination unblocking agent, preparation method and application |
| CN104371684B (en) * | 2014-10-27 | 2018-06-15 | 西安石油大学 | A kind of more hydrogen hydrolysis micella acid deblocking agents and de-plugging process |
| CN105985759A (en) * | 2015-02-11 | 2016-10-05 | 中国海洋石油总公司 | Composite blocking remover for oil well and preparation method thereof |
| CN106281273B (en) * | 2015-05-15 | 2019-09-06 | 中国石油天然气股份有限公司 | It is a kind of for being acidified the acid fluid system of carbonate reservoir |
| CN104974726A (en) * | 2015-06-10 | 2015-10-14 | 天津大港油田滨港集团博弘石油化工有限公司 | Compound acid solution blocking remover for oilfield clogging |
| CN105255466B (en) * | 2015-10-28 | 2018-02-13 | 中国石油化工股份有限公司 | Oil well slow de-plugging agent and method for removing blockage |
| CN106869880B (en) * | 2015-12-11 | 2019-08-02 | 中国石油天然气股份有限公司 | A kind of sandstone reservoir acidization tool |
| CN105505360B (en) * | 2015-12-28 | 2018-11-16 | 中国石油化工股份有限公司 | A kind of fluoboric acid de-plugging agent and acidification method for removing blockage |
| CN106281276A (en) * | 2016-07-21 | 2017-01-04 | 陕西兴油科技开发有限公司 | Apply the multistage deep acidification method of the Compound-acid on plug removal in oil and water well |
| CN106433607A (en) * | 2016-09-09 | 2017-02-22 | 中国海洋石油总公司 | Combined synergistic acid system for sandstone |
| CN106566504B (en) * | 2016-10-12 | 2018-04-17 | 延安市永科石油工程技术服务有限公司 | In a kind of fanout free region and acid oil, well de-plugging agent and its use technique |
| CN106437670A (en) * | 2016-10-31 | 2017-02-22 | 重庆大学 | Method for improving coal seam permeability based on acidification means |
| CN106811186B (en) * | 2017-01-12 | 2019-04-16 | 大庆市杰森钻采助剂厂 | A kind of acidification blocking remover |
| CN107012471B (en) * | 2017-05-04 | 2019-11-12 | 太仓沪试试剂有限公司 | A kind of duct cleaning agent and its application |
| CN108517204A (en) * | 2018-04-11 | 2018-09-11 | 扬州润达油田化学剂有限公司 | A kind of three-in-one acidification blocking remover and its application process for de-plugging of well |
| CN108611085B (en) * | 2018-05-22 | 2021-05-28 | 东北石油大学 | Acid liquor for acid fracturing of low physical property section of SAGD well |
| CN108865091A (en) * | 2018-06-14 | 2018-11-23 | 兰州凯宏中原石油科技有限公司 | A kind of colloidal sol enhancing combined removing plug by acid liquid and preparation method thereof |
| CN108865090A (en) * | 2018-06-14 | 2018-11-23 | 兰州凯宏中原石油科技有限公司 | A kind of inhibition combined removing plug by acid liquid and preparation method thereof |
| CN109913192A (en) * | 2019-04-09 | 2019-06-21 | 天津市擎华能源技术有限责任公司 | Desalination de-plugging agent |
| CN110055043A (en) * | 2019-05-17 | 2019-07-26 | 西安奥德石油工程技术有限责任公司 | Multistage targeting Compound-acid and preparation method thereof |
| CN110157399A (en) * | 2019-05-29 | 2019-08-23 | 马勇 | Coal bed gas well pit shaft de-plugging working solution and its application method |
| CN111502597B (en) * | 2020-06-02 | 2020-11-24 | 中国石油天然气股份有限公司西南油气田分公司工程技术研究院 | Combined efficient blockage removing system and blockage removing method thereof |
| CN111909676B (en) * | 2020-07-29 | 2022-08-16 | 四川圣诺油气工程技术服务有限公司 | Plugging remover for oil pipe of sulfur-containing gas well and preparation method thereof |
| CN112048292B (en) * | 2020-08-17 | 2023-02-28 | 中海油田服务股份有限公司 | Blockage removing liquid and application thereof |
| CN112961661B (en) * | 2021-03-19 | 2022-10-18 | 大庆油田有限责任公司 | Nano acid for acidification and blockage removal of low-permeability reservoir |
| CN113046051A (en) * | 2021-03-26 | 2021-06-29 | 大庆井升伟业油田技术服务有限公司 | Online solid-liquid flow-splitting acid suitable for sandstone reservoir heterogeneous oil layer and preparation method and application thereof |
| CN113174243B (en) * | 2021-05-07 | 2022-07-01 | 河北峻极化工科技有限公司 | Self-selection flow-dividing blockage removal system for improving interlayer contradiction of sandstone reservoir and application method thereof |
| CN115678523B (en) * | 2021-07-30 | 2024-03-01 | 中国石油天然气股份有限公司 | Acid-based blocking removal system |
| CN113684012B (en) * | 2021-10-25 | 2022-02-08 | 胜利油田海发环保化工有限责任公司 | Acidizing blocking remover and preparation method thereof |
| CN114058350B (en) * | 2021-11-26 | 2023-05-26 | 中海油田服务股份有限公司 | Chlorite blocking remover, preparation method, application and blocking removing method thereof |
| CN114591721A (en) * | 2022-03-08 | 2022-06-07 | 中海油能源发展股份有限公司 | Infiltration-increasing and sand-stabilizing acidizing composite working fluid for unconsolidated sandstone reservoir and preparation method and application thereof |
| CN114790382A (en) * | 2022-03-30 | 2022-07-26 | 中海油能源发展股份有限公司 | Blocking remover for oil well and flow of flowback liquid and use method thereof |
| CN114984804B (en) * | 2022-07-15 | 2023-04-25 | 兰州凯宏中原石油科技有限公司 | Mixed blending method for oil field oil-water well compound acid |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4888121A (en) * | 1988-04-05 | 1989-12-19 | Halliburton Company | Compositions and method for controlling precipitation when acidizing sour wells |
| US6436880B1 (en) * | 2000-05-03 | 2002-08-20 | Schlumberger Technology Corporation | Well treatment fluids comprising chelating agents |
| CN1429963A (en) * | 2001-12-30 | 2003-07-16 | 中国石油天然气股份有限公司 | Water injection well nitric acid powder-acid liquid system and acidification process |
| CN1216121C (en) * | 2003-02-25 | 2005-08-24 | 大庆油田有限责任公司 | Acidification blocking remover of sandstone thin difference oil layer compound acid |
| CN1532259A (en) * | 2003-03-18 | 2004-09-29 | 大庆油田有限责任公司 | Powder nitric acid deblocking agent |
| CN1488704A (en) * | 2003-07-31 | 2004-04-14 | 计万军 | Acidifying unblocking liquid for unblocking stratum of water injection well |
| CN102220116B (en) * | 2011-05-06 | 2013-05-15 | 河北科技大学 | Composite sodium hypochlorite solution oil well blocking remover |
-
2012
- 2012-07-17 CN CN201210246707.1A patent/CN102775980B/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108373911A (en) * | 2018-04-18 | 2018-08-07 | 河北峻极化工科技有限公司 | Blockages relieving fluid and preparation method thereof is chelated applied to middle and high infiltration sandstone reservoir |
| CN108373911B (en) * | 2018-04-18 | 2020-12-01 | 河北峻极化工科技有限公司 | Chelating blocking remover applied to medium-high permeability sandstone reservoir and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102775980A (en) | 2012-11-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102775980B (en) | Acidizing block remover suitable for complex lithologic reservoir | |
| CN106050213B (en) | A kind of sandstone reservoir low damage distributary acid method | |
| CN102634332B (en) | Blockage remover for decompression and steam injection in high clay content sandstone oil reservoir | |
| CN103265943B (en) | Low concentration guanidine gum glue laminated splits system linking agent and preparation technology thereof | |
| CN102516961B (en) | Organic/inorganic crosslinking system plugging agent applicable to high-temperature oil reservoir | |
| US11454099B2 (en) | Method for determining acidization effectiveness for wellbore operations | |
| CN108822819A (en) | A kind of super low percolation oilfield oil-water well combined removing plug by acid liquid | |
| CN106566521B (en) | Preparation and application of anion clean fracturing fluid and gel breaker thereof | |
| CN102775974A (en) | Active mixed acid plugging removal solution applicable to low permeability reservoir | |
| CN105368440A (en) | Novel environmental-friendly acidizing fluid suitable for acid-sensitive reservoir stratums, and preparation method thereof | |
| CN103602329A (en) | Drag reducer for fracturing | |
| CN104232041A (en) | Low-leak-off high-corrosion acidification unblocking liquid used in oil-water well and preparation method of low-leak-off high-corrosion acidification unblocking liquid | |
| CN105086990A (en) | Composite acid fracturing working fluid and preparation method thereof | |
| CN105985762A (en) | Fracturing fluid and preparation method thereof | |
| CN103773328A (en) | Clay anti-swelling stabilizer as well as preparation method and application thereof | |
| CN1548498A (en) | Oil layer protecting drilling fluid without clay | |
| CN103224776A (en) | Oil field flooding stratum protective agent and preparation method and application thereof | |
| CN101255332A (en) | Solid-free high temperature resistant petroleum oil well completion working liquid | |
| CN104877661A (en) | Preparation method of clean retarded acids CAr for constructing rock nanometer aperture without tubular column replacement | |
| CN1528854A (en) | Compound acidifying liquid containing nitric acid and boratofluroic acid and its use method | |
| CN103694979B (en) | A kind of MH acid composition and application thereof | |
| CN105505361B (en) | A kind of preparation method of water injection well self-generating foam micella acid solution | |
| CN105542732A (en) | Autogenetic foam micelle acid liquid for water injection well | |
| CN102153994B (en) | High-temperature miscible phase temporary plugging and sealing agent and preparation method thereof | |
| CN103666428A (en) | Biological enzyme oil displacement agent |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: DAQING QIXING PETROLEUM TECHNOLOGY CO., LTD. Effective date: 20140430 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: DAQING, HEILONGJIANG PROVINCE TO: 163000 DAQING, HEILONGJIANG PROVINCE |
|
| TA01 | Transfer of patent application right |
Effective date of registration: 20140430 Address after: 503, room 12, innovation building, science and Technology Innovation Park, No. 163000, Xinke Road, hi tech Zone, Heilongjiang, Daqing Applicant after: Daqing Jingsheng Weiye Oilfield Technology Service Co.,Ltd. Applicant after: DAQING QIXING PETROLEUM SCIENCE AND TECHNOLOGY LTD. Address before: Room 503, Chuangxin building, 12, Xinke Road, hi tech Zone, Daqing, Heilongjiang Applicant before: Daqing Jingsheng Weiye Oilfield Technology Service Co.,Ltd. |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |