CN103881689A - Method for improving performance of plant gum fracturing fluid with high content of calcium and magnesium - Google Patents
Method for improving performance of plant gum fracturing fluid with high content of calcium and magnesium Download PDFInfo
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- CN103881689A CN103881689A CN201410094297.2A CN201410094297A CN103881689A CN 103881689 A CN103881689 A CN 103881689A CN 201410094297 A CN201410094297 A CN 201410094297A CN 103881689 A CN103881689 A CN 103881689A
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- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/62—Compositions for forming crevices or fractures
- C09K8/66—Compositions based on water or polar solvents
- C09K8/68—Compositions based on water or polar solvents containing organic compounds
- C09K8/685—Compositions based on water or polar solvents containing organic compounds containing cross-linking agents
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- C—CHEMISTRY; METALLURGY
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- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/62—Compositions for forming crevices or fractures
- C09K8/66—Compositions based on water or polar solvents
- C09K8/665—Compositions based on water or polar solvents containing inorganic compounds
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- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/84—Compositions based on water or polar solvents
- C09K8/86—Compositions based on water or polar solvents containing organic compounds
- C09K8/88—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/887—Compositions based on water or polar solvents containing organic compounds macromolecular compounds containing cross-linking agents
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/84—Compositions based on water or polar solvents
- C09K8/86—Compositions based on water or polar solvents containing organic compounds
- C09K8/88—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/90—Compositions based on water or polar solvents containing organic compounds macromolecular compounds of natural origin, e.g. polysaccharides, cellulose
Abstract
The invention discloses a method for improving performance of a plant gum fracturing fluid with a high content of calcium and magnesium. The method comprises the following steps: firstly detecting a total content of calcium and magnesium in water for the fracturing fluid with the high content of calcium and magnesium, determining an addition quantity of a calcium-magnesium screening agent by taking a usage quantity being greater than 0.1A% of the water for the fracturing fluid according to the total content of calcium and magnesium, and adding the required quantity of calcium-magnesium screening agent into the water for the fracturing fluid to mix uniformly; then preparing the plant gum fracturing fluid according to design standards required for preparing the plant gum fracturing fluid through clear water and preparation instructions of the related plant gum, and uniformly mixing the plant gum fracturing fluid; determining an adding quantity of a pH adjusting agent by taking a usage quantity being 0.01A-5.0A% of the water for the fracturing fluid according to the total content of calcium and magnesium, and adding the required pH adjusting agent to mix uniformly. A fracturing fluid, which is prepared by the method and used for hydraulically fracturing, has the characteristics of swelling and thorough tackifying of plant gum macromolecules; the fracturing fluid does not precipitate before and after entering stratum; meanwhile, the fracturing fluid is excellent in temperature resistance capacity and shearing resistance capacity.
Description
Technical field
The present invention relates to a kind of method that improves those high in calcium magnesium plant gum fracturing fluid performance, the preparation for oil-gas field plant gum fracturing fluid after detecting, process by the fracturing liquid water to containing those high in calcium magnesium specifically, to improve the method for fracturing liquid performance.
Background technology
Along with environmental protection consciousness and the reinforcement requiring of saving water and energy; be accompanied by that oil-gas field is developed on a large scale, the carrying out of offshore oil and gas field pressing crack construction, start progressively to utilize the underground water, seawater, oil-gas field (containing coal bed gas field, shale oil gas field) recovered water, oil-gas field (containing coal bed gas field, the shale oil gas field) fracturing outlet liquid etc. that contain those high in calcium magnesium to substitute traditional clean surface water with preparation waterfrac treatment fracturing liquid both at home and abroad.
Utilizing the above-mentioned fracturing liquid water preparation plant gum fracturing fluid that contains those high in calcium magnesium, especially when crosslinking group fracturing liquid, the existence meeting of calcium magnesium causes the impact of following aspect on fracturing liquid performance:
1, calcium magnesium can suppress the swelling and tackify of vegetable jelly family macromolecule: this is as guar gum, fenugreek gum, sesbania gum and their derivative all can and be assembled by the hydroxyl on molecular chain or carboxyl and calcium magnesium generation chelating, precipitation because of vegetable jelly polymer.
2,, in fracturing liquid process for preparation, calcium magnesium can produce precipitation with required alkaline matter in fracturing liquid, thereby destroys of the fracturing fluid performance.
3, fracturing liquid is entering behind stratum, and along with the rising of temperature, calcium magnesium also can produce precipitation, thereby destroys of the fracturing fluid acid base equilibrium, reduces the resistance to shear ability of of the fracturing fluid heatproof.
Therefore,, in the time utilizing the above-mentioned fracturing liquid water preparation plant gum fracturing fluid that contains those high in calcium magnesium, must eliminate or fall the impact of low calcium and magnesium on fracturing liquid performance.
Summary of the invention
The object of the invention is to detect by the fracturing liquid water to containing those high in calcium magnesium, to determine calcium ions and magnesium ions content in water, then pass through to add calcium magnesium screener, pH adjusting agent,, and a kind of method that improves those high in calcium magnesium plant gum fracturing fluid performance is provided.
For achieving the above object, the technical solution used in the present invention is:
A kind of method that improves those high in calcium magnesium plant gum fracturing fluid performance is provided, it is characterized in that: it comprises the following steps:
1, calcium-magnesium content detects:
Press SY/T 5523-2006 " water of oil-gas field analytical procedure " and analyze calcium magnesium total content in fracturing liquid water, calcium magnesium total content " A " is scaled the metering of " mg/ml " unit.
2, determining and interpolation of calcium magnesium screener quantity:
(1) determining of quantity: the total content of magnesium and calcium detecting according to aforementioned " 1, calcium-magnesium content detect ", by the dosage of the above Determination of quantity calcium of the 0.1A% of fracturing liquid water consumption magnesium screener, taking 0.2A-0.5A% as the best; Wherein: A is calcium magnesium total content in water, measures by " mg/ml " unit.
(2) add: after the calcium magnesium screener of desired number is added in fracturing liquid water, mix.
3, the preparation of plant gum fracturing fluid:
According to the preparation explanation of the clear water preparation desired technological standard of plant gum fracturing fluid and corresponding plants glue, in the fracturing liquid water that contains those high in calcium magnesium, prepare.
4, determining and interpolation of pH adjusting agent quantity:
(1) determining of quantity: the total content of magnesium and calcium detecting according to aforementioned " 1, calcium-magnesium content detect ", determine the dosage of pH adjusting agent by the 0.01A-5.0A% of fracturing liquid water; Wherein: A is calcium magnesium total content in water, measures by " mg/ml " unit.
(2) under the condition stirring or circulate, slowly add pH adjusting agent, after adding, mix.
Above-mentioned fracturing liquid water refers to that the underground water, seawater, the oil-gas field that can be used to preparing fracturing fluid comprise containing coal bed gas field or shale Produced Water In Oil-gas Fields, Ngi, oil-gas field and comprises containing coal bed gas field or shale oil gas field fracturing outlet liquid.
Above-mentioned those high in calcium magnesium fracturing liquid water refers to that calcium ions and magnesium ions total amount is greater than the underground water of 0.1 mg/ml, seawater, oil-gas field and comprises containing coal bed gas field or shale Produced Water In Oil-gas Fields, Ngi, oil-gas field and comprising containing coal bed gas field or shale oil gas field fracturing outlet liquid.
Above-mentioned calcium magnesium screener refers to any one and the arbitrary combination in them in tripoly phosphate sodium STPP or Potassium tripolyphosphate or Sodium hexametaphosphate 99 or hexa metaphosphoric acid potassium or EDTA or different anti-hematic acid or different anti-hematic acid sodium or citric acid or Trisodium Citrate or gluconic acid or Sunmorl N 60S or hydroxy ethylene diphosphonic acid or Amino Trimethylene Phosphonic Acid or polyacrylic acid or sodium polyacrylate or polyacrylic acid potassium or hydrolysis maleic anhydride or vinylformic acid/methyl acrylate copolymer or vinylformic acid/Propylene glycol monoacrylate/methyl acrylate terpolymer or acrylic acid/acrylamide methyl propane sulfonic acid/Hypophosporous Acid, 50 terpolymer or sodium lignosulfonate or lignosulfonic acid potassium or tannin and the mixture and the aqueous solution that form.
Above-mentioned vegetable jelly refers to the derivative of guar gum or sesbania gum or fenugreek gum or konjak gum and guar gum or sesbania gum or fenugreek gum or konjak gum.
Above-mentioned plant gum fracturing fluid refers to the fracturing liquid of the derivative preparation that utilizes guar gum or sesbania gum or fenugreek gum or konjak gum and guar gum or sesbania gum or fenugreek gum or konjak gum.
Above-mentioned pH adjusting agent is mixture and the aqueous solution that any one and the arbitrary combination in them in ammoniacal liquor or potassium hydroxide or sodium hydroxide or sodium carbonate or sodium bicarbonate or tertiary sodium phosphate class mineral alkali or Monoethanolamine MEA BASF or trolamine or methane amide or ethanamide organic amine forms.
Above-mentioned calcium magnesium screener, the dosage in fracturing liquid water is more than 0.1A%; Wherein A is calcium magnesium total content in water.
Above-mentioned pH adjusting agent, the dosage in fracturing liquid water is 0.01A-5.0A%; Wherein A is calcium magnesium total content in water.
By adopting after technique means of the present invention, utilize underground water, seawater, the oil-gas field of those high in calcium magnesium comprise containing coal bed gas field or shale Produced Water In Oil-gas Fields, Ngi, oil-gas field comprise containing coal bed gas field or shale oil gas field fracturing outlet liquid etc. substitute swelling and tackify that waterfrac treatment fracturing liquid that traditional clean surface water prepares has a vegetable jelly family macromolecule thoroughly characteristic, fracturing liquid front and back, stratum are not precipitated, the resistance to shear ability of of the fracturing fluid heatproof is good entering.
Brief description of the drawings
Fig. 1 is production technological process of the present invention.
Embodiment
, provide specific embodiment of the invention case below, but be not limited to the present embodiment:
Embodiment 1:
1, in the container with water circulating pump, add 100m3 oil field extracted water, analyze wherein calcium magnesium total content by SY/T 5523-2006 " water of oil-gas field analytical procedure ", detect calcium magnesium total content and be 2700 mg/litre, i.e. A=2.7 mg/ml.
2, the calcium-magnesium content of measuring according to the present embodiment 1 " 1 ", determines by the 0.2A% of oil field produced water inventory, i.e. 0.2 × 2.7%=0.54% interpolation calcium magnesium screener; 540 kilograms of calcium magnesium screeners are added in above-mentioned 100m3 oil field extracted water to cycle balance.
3, press the operation instruction of hydroxypropylguar gum, 400 kilograms of hydroxypropylguar gums are slowly added in oil field extracted water with negative pressure hydraulic jet hopper, after adding, add again other chemical additive requiring in fracturing liquid design, and continue to be circulated to container medium viscosity uniformity.
4, the calcium magnesium total content of measuring according to the present embodiment 1 " 1 ", determines by the 0.01A% of oil field produced water inventory, i.e. 0.01 × 2.7%=0.027% interpolation pH adjusting agent; Under the condition of circulation, slowly add 27 kilograms of pH adjusting agents, add rear cycle balance and be oil field produced water base fracturing liquid.
The solution of preparing by the present embodiment 1 is the oil field produced water base fracturing liquid of 0.4% hydroxypropyl guar gum concentration, and the of the fracturing fluid salient features of clear water base of the 0.4% hydroxypropyl guar gum concentration that stability under base fluid viscosity, differing temps, heat resistance after crosslinked with organic boron are all prepared with use clear water is close.Related data sees attached list.
Embodiment 2:
1, in the container with water circulating pump, add 100m3 seawater, analyze wherein calcium magnesium total content by SY/T 5523-2006 " water of oil-gas field analytical procedure ", detect calcium magnesium total content and be 3100 mg/litre, i.e. A=3.1 mg/ml.
2,, according to the calcium-magnesium content of measuring in the present embodiment 2 " 1 ", determine and press the 0.3A% of seawater total amount, i.e. 0.3 × 3.1%=0.93% interpolation calcium magnesium screener; 930 kilograms of calcium magnesium screeners are added in above-mentioned seawater to cycle balance.
3, press the operation instruction of hydroxypropylguar gum, it is 0.5% fracturing liquid preparation that 500 kilograms of hydroxypropylguar gums are carried out to concentration with oil field fracturing fluid preparation continuous mixing truck.
4, the calcium-magnesium content of measuring according to the present embodiment 2 " 1 ", determines and presses the 0.02A% of seawater total amount, i.e. 0.02 × 3.1%=0.062% interpolation pH adjusting agent; After evenly adding 62 kilograms of pH adjusting agents, mix, the fluid terminal of continuous mixing truck is seawater-based fracturing fluid.
The solution of preparing by the present embodiment 2 is the seawater-based fracturing fluid of 0.5% hydroxypropyl guar gum concentration, and the of the fracturing fluid salient features of clear water base of the 0.5% hydroxypropyl guar gum concentration that stability under base fluid viscosity, differing temps, heat resistance after crosslinked with organic boron are all prepared with use clear water is close.Related data sees attached list.
Embodiment 3:
1, in the container with water circulating pump, add 100m3 fracturing outlet liquid, analyze wherein calcium magnesium total content by SY/T 5523-2006 " water of oil-gas field analytical procedure ", detect calcium magnesium total content and be 1100 mg/litre, i.e. A=1.1 mg/ml.
2, the calcium-magnesium content of measuring according to " 1 " in the present embodiment, determines and presses the 0.4A% of fracturing outlet liquid total amount, i.e. 0.4 × 1.1%=0.44% interpolation calcium magnesium screener; 440 kilograms of calcium magnesium screeners are added in above-mentioned fracturing outlet liquid to cycle balance.
3, press the operation instruction of hydroxypropylguar gum, 300 kilograms of hydroxypropylguar gums are slowly added in fracturing outlet liquid with negative pressure hydraulic jet hopper, after adding, add again other chemical additive requiring in fracturing liquid design, and continue to be circulated to container medium viscosity uniformity.
4, the calcium-magnesium content of measuring according to " 1 " in the present embodiment 3, determines and presses the 0.03A% of fracturing outlet liquid total amount, i.e. 0.03 × 1.1%=0.033% interpolation pH adjusting agent; Under the condition of circulation, slowly add 33 kilograms of pH adjusting agents, add rear cycle balance and be fracturing outlet liquid base fracturing liquid.
The solution of preparing by the present embodiment 3 is the fracturing outlet liquid base fracturing liquid of 0.3% hydroxypropyl guar gum concentration, and the of the fracturing fluid salient features of clear water base of the 0.3% hydroxypropyl guar gum concentration that stability under base fluid viscosity, differing temps, heat resistance after crosslinked with organic boron are all prepared with use clear water is close.Related data sees attached list.
Subordinate list:
Claims (9)
1. a method that improves those high in calcium magnesium plant gum fracturing fluid performance, is characterized in that: it comprises the following steps:
1, calcium-magnesium content detects:
Press SY/T 5523-2006 " water of oil-gas field analytical procedure " and analyze calcium magnesium total content in fracturing liquid water, calcium magnesium total content " A " is scaled the metering of " mg/ml " unit;
2, determining and interpolation of calcium magnesium screener quantity:
(1) determining of quantity: the total content of magnesium and calcium detecting according to aforementioned " 1, calcium-magnesium content detect ", by the dosage of the above Determination of quantity calcium of the 0.1A% of fracturing liquid water consumption magnesium screener, taking 0.2A-0.5A% as the best; Wherein: A is calcium magnesium total content in water, measures by " mg/ml " unit;
(2) add: after the calcium magnesium screener of desired number is added in fracturing liquid water, mix;
3, the preparation of plant gum fracturing fluid:
According to the preparation explanation of the clear water preparation desired technological standard of plant gum fracturing fluid and corresponding plants glue, in the fracturing liquid water that contains those high in calcium magnesium, prepare;
4, determining and interpolation of pH adjusting agent quantity:
(1) determining of quantity: the total content of magnesium and calcium detecting according to aforementioned " 1, calcium-magnesium content detect ", determine the dosage of pH adjusting agent by the 0.01A-5.0A% of fracturing liquid water; Wherein: A is calcium magnesium total content in water, measures by " mg/ml " unit;
(2) under the condition stirring or circulate, slowly add pH adjusting agent, after adding, mix.
2. a kind of method that improves those high in calcium magnesium plant gum fracturing fluid performance according to claim 1, is characterized in that: described fracturing liquid water refers to that the underground water, seawater, the oil-gas field that can be used to preparing fracturing fluid comprise containing coal bed gas field or shale Produced Water In Oil-gas Fields, Ngi, oil-gas field and comprises containing coal bed gas field or shale oil gas field fracturing outlet liquid.
3. a kind of method that improves those high in calcium magnesium plant gum fracturing fluid performance according to claim 1, is characterized in that: described those high in calcium magnesium fracturing liquid water refers to that calcium ions and magnesium ions total amount is greater than the underground water of 0.1 mg/ml, seawater, oil-gas field and comprises containing coal bed gas field or shale Produced Water In Oil-gas Fields, Ngi, oil-gas field and comprising containing coal bed gas field or shale oil gas field fracturing outlet liquid.
4. a kind of method that improves those high in calcium magnesium plant gum fracturing fluid performance according to claim 1, is characterized in that: described calcium magnesium screener refers to any one and the arbitrary combination in them in tripoly phosphate sodium STPP or Potassium tripolyphosphate or Sodium hexametaphosphate 99 or hexa metaphosphoric acid potassium or EDTA or different anti-hematic acid or different anti-hematic acid sodium or citric acid or Trisodium Citrate or gluconic acid or Sunmorl N 60S or hydroxy ethylene diphosphonic acid or Amino Trimethylene Phosphonic Acid or polyacrylic acid or sodium polyacrylate or polyacrylic acid potassium or hydrolysis maleic anhydride or vinylformic acid/methyl acrylate copolymer or vinylformic acid/Propylene glycol monoacrylate/methyl acrylate terpolymer or acrylic acid/acrylamide methyl propane sulfonic acid/Hypophosporous Acid, 50 terpolymer or sodium lignosulfonate or lignosulfonic acid potassium or tannin and the mixture and the aqueous solution that form.
5. a kind of method that improves those high in calcium magnesium plant gum fracturing fluid performance according to claim 1, is characterized in that: described vegetable jelly refers to the derivative of guar gum or sesbania gum or fenugreek gum or konjak gum and guar gum or sesbania gum or fenugreek gum or konjak gum.
6. a kind of method that improves those high in calcium magnesium plant gum fracturing fluid performance according to claim 1, is characterized in that: described plant gum fracturing fluid refers to the fracturing liquid of the derivative preparation that utilizes guar gum or sesbania gum or fenugreek gum or konjak gum and guar gum or sesbania gum or fenugreek gum or konjak gum.
7. a kind of method that improves those high in calcium magnesium plant gum fracturing fluid performance according to claim 1, is characterized in that: described pH adjusting agent is mixture and the aqueous solution that any one and the arbitrary combination in them in ammoniacal liquor or potassium hydroxide or sodium hydroxide or sodium carbonate or sodium bicarbonate or tertiary sodium phosphate class mineral alkali or Monoethanolamine MEA BASF or trolamine or methane amide or ethanamide organic amine forms.
8. a kind of method that improves those high in calcium magnesium plant gum fracturing fluid performance according to claim 4, is characterized in that: described calcium magnesium screener, and the dosage in fracturing liquid water is more than 0.1A%; Wherein A is calcium magnesium total content in water.
9. a kind of method that improves those high in calcium magnesium plant gum fracturing fluid performance according to claim 7, is characterized in that: described pH adjusting agent, and the dosage in fracturing liquid water is 0.01A-5.0A%; Wherein A is calcium magnesium total content in water.
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
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CN104877658A (en) * | 2015-04-13 | 2015-09-02 | 陕西延长石油(集团)有限责任公司研究院 | Fracturing fluid prepared from high-salinity formation water and preparation method of fracturing fluid |
CN105199705A (en) * | 2015-09-17 | 2015-12-30 | 昆山京昆油田化学科技开发公司 | Rapid viscosity-increasing fracturing thickening agent suitable for preparing flow-back liquid treatment water |
CN106928958A (en) * | 2016-12-22 | 2017-07-07 | 陕西延长石油(集团)有限责任公司(延长油矿管理局)油气勘探公司 | A kind of oil-gas field fracturing special chelant |
CN107573919A (en) * | 2017-08-02 | 2018-01-12 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | A kind of pressure break biological regulator and preparation method and application |
CN109852365A (en) * | 2018-12-17 | 2019-06-07 | 中国石油天然气股份有限公司 | Prepare method, the guanidine gum fracturing fluid by this method preparation and its application of guanidine gum fracturing fluid |
CN111735708A (en) * | 2020-07-01 | 2020-10-02 | 中国矿业大学 | Water-ammonia composite fracturing rock test method based on tracing technology |
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CN102757778A (en) * | 2012-08-14 | 2012-10-31 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Fracturing fluid capable of resisting high salinity water quality |
CN103275691A (en) * | 2013-06-03 | 2013-09-04 | 深圳市百勤石油技术有限公司 | Reusable slippery water fracturing fluid for shale oil and gas reservoir |
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CN102757778A (en) * | 2012-08-14 | 2012-10-31 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Fracturing fluid capable of resisting high salinity water quality |
CN103275691A (en) * | 2013-06-03 | 2013-09-04 | 深圳市百勤石油技术有限公司 | Reusable slippery water fracturing fluid for shale oil and gas reservoir |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
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CN104877658A (en) * | 2015-04-13 | 2015-09-02 | 陕西延长石油(集团)有限责任公司研究院 | Fracturing fluid prepared from high-salinity formation water and preparation method of fracturing fluid |
CN105199705A (en) * | 2015-09-17 | 2015-12-30 | 昆山京昆油田化学科技开发公司 | Rapid viscosity-increasing fracturing thickening agent suitable for preparing flow-back liquid treatment water |
CN106928958A (en) * | 2016-12-22 | 2017-07-07 | 陕西延长石油(集团)有限责任公司(延长油矿管理局)油气勘探公司 | A kind of oil-gas field fracturing special chelant |
CN107573919A (en) * | 2017-08-02 | 2018-01-12 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | A kind of pressure break biological regulator and preparation method and application |
CN109852365A (en) * | 2018-12-17 | 2019-06-07 | 中国石油天然气股份有限公司 | Prepare method, the guanidine gum fracturing fluid by this method preparation and its application of guanidine gum fracturing fluid |
CN111735708A (en) * | 2020-07-01 | 2020-10-02 | 中国矿业大学 | Water-ammonia composite fracturing rock test method based on tracing technology |
CN111735708B (en) * | 2020-07-01 | 2021-08-31 | 中国矿业大学 | Water-ammonia composite fracturing rock test method based on tracing technology |
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