CN101712864B - Multi-hydrogen acid injection increasing agent used in sandstone oilfields - Google Patents
Multi-hydrogen acid injection increasing agent used in sandstone oilfields Download PDFInfo
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- CN101712864B CN101712864B CN 200910238211 CN200910238211A CN101712864B CN 101712864 B CN101712864 B CN 101712864B CN 200910238211 CN200910238211 CN 200910238211 CN 200910238211 A CN200910238211 A CN 200910238211A CN 101712864 B CN101712864 B CN 101712864B
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Abstract
A multi-hydrogen acid injection increasing agent used in sandstone oilfields is applied to water injection in oilfields and is an additive of injected water. The injection increasing agent is characterized by comprising the following components in parts by weight: 20-25 parts of phosphoric acid, 0.5-1 part of corrosion inhibitor IS-129Y for hydrochloric acid to remove oil, 8.5-10 parts of ammonium phosphate, 12.5-17.5 parts of hydrofluoric acid, 0.05-0.1 part of fluorocarbon surfactant FN-3, 0.05-1 part of potassium chloride, 0.05-1 part of vitamin A and 50-53 parts of water. The injection increasing agent has the effects of increasing the mobility of crude oil in the reservoir, inhibiting growth of the microbes, reducing blockage of the well bottom and the ground, preventing scales from generating and reducing harm of the scale precipitation to the ground. Being used, the injection increasing agent can improve the percolation ability of the injected water, decrease the pressure at the mouth of the water injection well by 5-15 percent and achieve the goals of decreasing pressure and increasing injection in low permeability oilfields.
Description
Technical field
The present invention relates to oil recovery technique field, oil field, particularly flushing operation is a kind of interpolation treatment agent that injects water, is used for the sandstone oil field WIW, can reduce the pressure of injection pump.
Background technology
Most of oil fields all will be taked secondary oil recovery (water drive) later when primary oil recovery (blowing) and produce on stream, its objective is in order to improve the RF in oil field.Adopting the major measure of secondary oil recovery technology is in WIW, to inject water, and water promotes crude oil at reservoir and flows to producing well.Though this method can improve the RF in oil field.But along with the prolongation of water injection time, the water injection pressure of WIW will constantly rise, and causes the water injection rate in oil field not reach the requirement of injection allocation, causes reservoir pressure to descend.
At present, the water filling of sandstone oil reservoir WIW superpressure is the hard nut to crack of puzzlement oil field development always, not only produces to the oil field and has caused serious potential safety hazard, and make the stable yields basis in oil field not firm.Used dissimilar technology and measure for many years, but DeGrain.
Summary of the invention
The objective of the invention is: a kind of multi-hydrogen acid injection increasing agent used in sandstone oilfields is provided; Adopt particular compounds to replace HCL and villiaumite generation hydrogenation; Obtain the novel HF acid fluid system of many hydracids, this novel acid has a plurality of hydrogen ions, can under different chemical metering condition, decompose multifunctional acid.Make extender have slow property, extremely strong adsorptive power, delay/suppress the sedimentary generative capacity in immediate vicinity of wellbore; Ability catalysis HF acid and quartzy reaction also can realize the uniform acid distribution and the deep acidifying of oil reservoir; Simultaneously can not cause bigger injury to the stratum; Improve the percolation ability that injects water, reach the purpose of low permeability oil field step-down augmented injection.
The technical scheme that the present invention adopts is:
One, the raw material of multi-hydrogen acid injection increasing agent used in sandstone oilfields and each ingredients weight parts:
Raw material comprises:
1, phosphoric acid (industrial goods).
2, oil removing salt acid inhibitor IS-129Y, another name: IS-129Y.(Huang Hongzhou edits Chinese tensio-active agent overview one book, the 552nd page of Chemical Industry Press);
Character: the reddish-brown transparent liquid, fragrant odour is soluble in acid, the alcohol and water.
Purposes: corrosion inhibitors for acidic media.
Production unit: northing Katyuan, lake ltd.
3, ammonium phosphate (industrial goods);
4, hydrofluoric acid (industrial goods);
5, fluorocarbon surfactant FN-3 (Huang Hongzhou edits Chinese tensio-active agent overview one book, the 463rd page of Chemical Industry Press);
Purposes: the soft water foam agent main raw material that goes out, also as washing composition, wetting agent, dispersion agent, pore forming material, sterilant;
Production unit: Shanghai organic chemistry institute demonstration plant.
6, Repone K (industrial goods),
7, vitamin A
8, water.
Each ingredients weight parts of multi-hydrogen acid injection increasing agent used in sandstone oilfields is:
1, phosphoric acid (industrial goods): 20～25 parts;
2, oil removing salt acid inhibitor IS-129Y (industrial goods): 0.5～1 part
3, ammonium phosphate (industrial goods): 8.5～10 parts;
4, hydrofluoric acid (industrial goods): 12.5～17.5 parts;
5, fluorocarbon surfactant FN-3:0.05～0.1 part;
6, Repone K (industrial goods) is 0.05～1 part;
7, vitamin A: 0.05～1 part;
8, water: 50～53 parts.
Two, the working method of multi-hydrogen acid injection increasing agent used in sandstone oilfields
Major equipment:
Enamel reaction still with 2000L of stirring, heating, cooling and vacuum system.
Working method:
Phosphoric acid, phosphamide, hydrofluoric acid, oil removing salt acid inhibitor IS-129Y, fluorocarbon surfactant FN-3 are added enamel reaction still by weight, slowly be warmed up to 50～65 ℃; Secondly, under constantly stirring, by weight water is added enamel reaction still, continue to stir 30 minutes; And then by weight Repone K and vitamin A being added enamel reaction still successively, the limit edged stirs; At last water is added enamel reaction still by weight, stir stop after 30 minutes the heating; At last, stir, be cooled to normal temperature, obtain multi-hydrogen acid injection increasing agent used in sandstone oilfields while cooling off.
Method of use: injecting evenly adding multi-hydrogen acid injection increasing agent used in sandstone oilfields of water, the consumption of multi-hydrogen acid injection increasing agent used in sandstone oilfields is to inject 0.1～0.3% of water weight.The field technician can skillfully accomplish according to field condition.
Beneficial effect of the present invention: multi-hydrogen acid injection increasing agent used in sandstone oilfields of the present invention, evenly add and inject water, through reducing oil water interfacial tension, reduce Jamin effect, increase reservoir crude oil flow ability; Change the rock surface wettability, make oil reservoir become more hydrophilic, the effect of performance capillary force; And can suppress microorganism growth, reduce shaft bottom and reservoir choke; Can also suppress clay swelling, reduce formation damage; Prevent that dirt from generating, reduce the dirt deposition formation damage.The use of multi-hydrogen acid injection increasing agent used in sandstone oilfields can improve the percolation ability that injects water, and the pressure of WIW well head is descended 5～15 percentage points, reaches low permeability oil field step-down augmented injection.Not only solve the higher hard nut to crack of water injection well in oil fields water injection pressure, obtained the new breakthrough of increase water injection technology.
Embodiment
Embodiment 1: each ingredients weight parts of multi-hydrogen acid injection increasing agent used in sandstone oilfields is:
1, phosphoric acid (industrial goods): 20.5 parts;
2, oil removing salt acid inhibitor IS-129Y (industrial goods): 0.5 part
3, ammonium phosphate (industrial goods): 10 parts;
4, hydrofluoric acid (industrial goods): 17.5 parts;
5, fluorocarbon surfactant FN-3:0.05 part;
6, Repone K (industrial goods) is 0.05 part;
7, vitamin A: 0.05 part;
8, water: 51.35 parts.
The working method of multi-hydrogen acid injection increasing agent used in sandstone oilfields:
Adopt a enamel reaction still with 2000L of stirring, heating, cooling and vacuum system.
Working method:
Phosphoric acid, phosphamide, hydrofluoric acid, oil removing salt acid inhibitor IS-129Y, fluorocarbon surfactant FN-3 are added enamel reaction still by weight, slowly be warmed up to 60 ± 1 ℃; Secondly, under constantly stirring, by weight water is added enamel reaction still, continue to stir 30 minutes; And then by weight Repone K and vitamin A being added enamel reaction still successively, the limit edged stirs; At last water is added enamel reaction still by weight, stir stopped in 30 minutes the heating; At last, stir, be cooled to normal temperature, obtain the multi-hydrogen acid injection increasing agent used in sandstone oilfields of embodiment 1 while cooling off.
The multi-hydrogen acid injection increasing agent used in sandstone oilfields of embodiment 1 uses at WIW, and consumption is to inject 0.2% of water weight, and obvious effects is that the pressure of WIW well head is descended 8 percentage points.
Embodiment 2: each ingredients weight parts of multi-hydrogen acid injection increasing agent used in sandstone oilfields is:
1, phosphoric acid (industrial goods): 22 parts;
2, oil removing salt acid inhibitor IS-129Y (industrial goods): 0.6 part
3, ammonium phosphate (industrial goods): 9.6 parts;
4, hydrofluoric acid (industrial goods): 16.5 parts;
5, fluorocarbon surfactant FN-3:0.06 part;
6, Repone K (industrial goods) is 0.06 part;
7, vitamin A: 0.06 part;
8, water: 51.12 parts.
The working method of embodiment 2 is identical with embodiment 1.
The multi-hydrogen acid injection increasing agent used in sandstone oilfields of embodiment 2 uses at WIW, and consumption is to inject 0.2% of water weight, and obvious effects is that the pressure of WIW well head is descended 12 percentage points.
Embodiment 3: each ingredients weight parts of multi-hydrogen acid injection increasing agent used in sandstone oilfields is:
1, phosphoric acid (industrial goods): 23 parts;
2, oil removing salt acid inhibitor IS-129Y (industrial goods): 0.7 part
3, ammonium phosphate (industrial goods): 9.1 parts;
4, hydrofluoric acid (industrial goods): 15 parts;
5, fluorocarbon surfactant FN-3:0.07 part;
6, Repone K (industrial goods) is 0.07 part;
7, vitamin A: 0.07 part;
8, water: 51.99 parts.
The working method of embodiment 3 is identical with embodiment 1.
The multi-hydrogen acid injection increasing agent used in sandstone oilfields of embodiment 3 uses at WIW, and consumption is to inject 0.2% of water weight, and obvious effects is that the pressure of WIW well head is descended 15 percentage points.
Embodiment 4: each ingredients weight parts of multi-hydrogen acid injection increasing agent used in sandstone oilfields is:
1, phosphoric acid (industrial goods): 24 parts;
2, oil removing salt acid inhibitor IS-129Y (industrial goods): 0.85 part
3, ammonium phosphate (industrial goods): 8.8 parts;
4, hydrofluoric acid (industrial goods): 14.5 parts;
5, fluorocarbon surfactant FN-3:0.08 part;
6, Repone K (industrial goods) is 0.08 part;
7, vitamin A: 0.08 part;
8, water: 51.61 parts.
The working method of embodiment 4 is identical with embodiment 1.
The multi-hydrogen acid injection increasing agent used in sandstone oilfields of embodiment 4 uses at WIW, and consumption is to inject 0.15% of water weight, and obvious effects is that the pressure of WIW well head is descended 7 percentage points.
Embodiment 5: each ingredients weight parts of multi-hydrogen acid injection increasing agent used in sandstone oilfields is:
1, phosphoric acid (industrial goods): 25 parts;
2, oil removing salt acid inhibitor IS-129Y (industrial goods): 0.95 part
3, ammonium phosphate (industrial goods): 8.5 parts;
4, hydrofluoric acid (industrial goods): 13 parts;
5, fluorocarbon surfactant FN-3:0.09 part;
6, Repone K (industrial goods) is 0.09 part;
7, vitamin A: 0.09 part;
8, water: 52.28 parts.
The working method of embodiment 5 is identical with embodiment 1.
The multi-hydrogen acid injection increasing agent used in sandstone oilfields of embodiment 5 uses at WIW, and consumption is to inject 0.25% of water weight, and obvious effects is that the pressure of WIW well head is descended 12 percentage points.
Claims (1)
1. multi-hydrogen acid injection increasing agent used in sandstone oilfields, it is characterized in that: each ingredients weight parts is:
A, phosphoric acid: 20～25 parts;
B, oil removing salt acid inhibitor IS-129Y:0.5～1 part;
C, ammonium phosphate: 8.5～10 parts;
D, hydrofluoric acid: 12.5～17.5 parts;
E, fluorocarbon surfactant FN-3:0.05～0.1 part;
0.05～1 part in F, Repone K;
G, vitamin A: 0.05～1 part;
H, water: 50～53 parts;
The working method of described multi-hydrogen acid injection increasing agent used in sandstone oilfields is:
Phosphoric acid, ammonium phosphate, hydrofluoric acid, oil removing salt acid inhibitor IS-129Y, fluorocarbon surfactant FN-3 are added enamel reaction still by weight, slowly be warmed up to 50～65 ℃; Secondly, under constantly stirring, by weight water is added enamel reaction still, continue to stir 30 minutes; And then by weight Repone K and vitamin A being added enamel reaction still successively, the limit edged stirs; At last water is added enamel reaction still by weight, stir stop after 30 minutes the heating; At last, stir, be cooled to normal temperature, obtain multi-hydrogen acid injection increasing agent used in sandstone oilfields while cooling off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 200910238211 CN101712864B (en) | 2009-11-17 | 2009-11-17 | Multi-hydrogen acid injection increasing agent used in sandstone oilfields |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200910238211 CN101712864B (en) | 2009-11-17 | 2009-11-17 | Multi-hydrogen acid injection increasing agent used in sandstone oilfields |
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| CN101712864A CN101712864A (en) | 2010-05-26 |
| CN101712864B true CN101712864B (en) | 2012-12-12 |
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| CN102877820A (en) * | 2011-07-15 | 2013-01-16 | 中国石油天然气股份有限公司 | Method for reducing water injection pressure of reservoir well |
| EP3545048A1 (en) * | 2016-11-23 | 2019-10-02 | BP Exploration Operating Company Limited | Oil recovery method |
| CN109777389A (en) * | 2019-03-04 | 2019-05-21 | 北京国海能源技术研究院 | A kind of MH acid system and preparation method thereof suitable for reservoir blockages relieving acidification |
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