CN103711467A - Formula for improving recovery ratio of authigenic CO2 - Google Patents
Formula for improving recovery ratio of authigenic CO2 Download PDFInfo
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- CN103711467A CN103711467A CN201310726490.9A CN201310726490A CN103711467A CN 103711467 A CN103711467 A CN 103711467A CN 201310726490 A CN201310726490 A CN 201310726490A CN 103711467 A CN103711467 A CN 103711467A
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Abstract
A formula for improving the recovery ratio of authigenic CO2 comprises, by mass, 5-15 parts of ammonium bicarbonate, 1-5 parts of bioactive agents, and the balance water which is not beyond 35 DEG C. In use, the formula is directly injected in the stratum and dissolved to generate CO2 through heat of the stratum; when the temperature of the stratum is below 35 DEG C, the CO2 is obtained through composite effect of the heat of the stratum and the bioactive agents. The formula can be applied to the fields of oil field oil displacement, fracturing and well repair, and achieves the purposes of improving the recovery ratio, and promoting fracturing fluid flowing-back. Foams are generated while gas is formed, stability of the foams is high, gas channeling can be effectively prevented, and the formula has the advantages of foam displacement of reservoir oil and foam well killing.
Description
Technical field
The present invention relates to a kind of formula that helps row, well workover for the displacement of reservoir oil, viscosity reduction, fracturing fluid, be specifically related to a kind of for spontaneous CO
2improve the formula of recovery ratio.
Technical background
As far back as 20 beginnings of the century, people are in order to keep formation pressure, improve production capacity, particularly for those Extra-low permeability oil reservoirs, proposed to utilize inflating method to improve the suggestion of Development Response of Oilfield, and progressively grow up in development afterwards, particularly gas injection mixed phase and non-phase-mixing driving oil tech become one of effective method in the exploitation of low-permeability oil deposit and heavy crude reservoir.This technology can make oil recovery factor improve 10%～15%, even higher.CO
2in oil field development, exploitation, major advantage is that adaptation geological conditions scope is wide, to light oil and heavy-oil reservoir, all can use.Restriction CO
2the main restricting factor of promoting is to have natural CO
2source, CO
2conveying, to the problem of advancing by leaps and bounds of producing well, oil well and equipment corrosion, safety and environmental problem etc.And the demand that oil reservoir can either meet gas drive from the angry a kind of method as novel raising recovery ratio can effectively solve some problems that exist in Eor By Gas Injection.The spontaneous air lift high recovery rate of oil reservoir technology is a kind of raising recovery ratio new technology of the integrated feature that possesses skills, and is by water injection well is injected to inorganic agent, and then various chemical agent generation thermal chemical reactions under formation condition, produce high temperature, high pressure, form CO
2gas, by a series of effects such as pollution layer de-plugging, high permeability formation shutoff, mixing gas drive and thermal recoveries, improves injected water swept volume and oil displacement efficiency, produces step-down augmented injection effect, and then improves the new technology of recovery ratio.But existing spontaneous CO
2technology is mainly to make with calcium carbonate greasy dirt and hydrochloric acid or urea and aminoquinoxaline, and hydrochloric acid and aminoquinoxaline are all severe corrosive medicaments, and oil well and equipment are had to corrosion, and gas production is affected by strata pressure; Function singleness, need add other additives just can obtain greater functionality.
Summary of the invention
In order to overcome the shortcoming of existing conventional gas injection and self generating gas system, meet oil reservoir from the demand of angry technological development, the object of the present invention is to provide a kind of for spontaneous CO
2the formula that improves recovery ratio is a kind of spontaneous CO that helps row, well workover etc. for the displacement of reservoir oil, reducing crude oil viscosity, fracturing fluid
2system, this invention can be applied in the fields such as the oil field displacement of reservoir oil, pressure break, well workover, improves recovery ratio, promotes the effects such as fracturing fluid recovery (backflow) to reach; Add activating agent to form foam generated simultaneously at gas, foam stability is high, can effectively prevent has channeling, and has the effect of foam flooding, foam kill-job.
In order to achieve the above object, technical scheme of the present invention is achieved in that
A kind of for spontaneous CO
2the formula that improves recovery ratio, its constituent mass umber comprises:
Carbonic hydroammonium accounts for 5-30 part, and activating agent accounts for 1-10 part, and surplus is to be no more than the water of 35 ℃; Described activating agent is the conventional anion in oil field, cation, nonionic surface active agent.
The conventional anion in described oil field, cation, nonionic surface active agent, comprise lauryl sodium sulfate, sodium dodecylbenzenesulfonate, lauroyl amido CAB or cocamidopropyl propyl amide decil lactone.
Use amount of the present invention is 100-300m
3, directly inject stratum.When formation temperature>=35 ℃, by stratum heat, decompose and generate CO
2, 1 ton of carbonic hydroammonium can generate 0.5-0.8m
3cO
2; If 35 ℃ of formation temperature <, interact viscosity reduction de-plugging by carbonic hydroammonium and activating agent.
Advantage of the present invention is:
(1) raw material is easy to get, and 1t raw material can generate 0.7t left and right CO
2gas, cost is low, and strata pressure does not affect gas production.
(2) add activating agent, foam generated when gas forms, can effectively prevent has channeling, and have the effect of foam flooding, foam kill-job.
(3) formation temperature is when more than 35 ℃, air release; Formation temperature below 35 ℃ time, is the compound action producing by mating with activating agent.
(4) have wide range of applications, can be applicable to the displacement of reservoir oil, viscosity reduction, fracturing fluid and help the fields such as row, well workover.
(5) do not corrode oil well rig, to environment without injury.
(6) store conveniently convenient transportation.
(7) in-situ generation CO of the present invention
2technology is mainly that major advantage is to have overcome CO based on producing the aqueous solution of gas and the chemical reaction between low concentration surfactant
2source and transport restrictions, to not corrosion of equipment, reduced the negative effect of environment and restraining factors, and the spontaneous CO of this oil reservoir
2system raw material used is cheap and easy to get and have a multifunctionality.
The specific embodiment
Embodiment mono-
A kind of for spontaneous CO
2the formula that improves recovery ratio, its components in mass portion number comprises: carbonic hydroammonium accounts for 5 parts, and lauryl sodium sulfate accounts for 2 parts, and 30 ℃ of water account for 93 parts.
Amount of preparation is 200m
3.Directly inject stratum, formation temperature is 50 ℃, by stratum heat, is decomposed and is generated 7m
3cO
2.Reducing under the prerequisite of equipment cost, obtained good effect of increasing production, and water content in crude oil also decreases.
Embodiment bis-
A kind of for spontaneous CO
2the formula that improves recovery ratio, its components in mass portion number comprises: carbonic hydroammonium accounts for 10 parts, and lauroyl amido CAB accounts for 2 parts, and 25 ℃ of water account for 88 parts.
Amount of preparation is 300m
3, directly injecting stratum, formation temperature is 60 ℃, by stratum heat, is decomposed and is generated 24m
3cO
2.Reducing under the prerequisite of equipment cost, obtained good effect of increasing production, and water content in crude oil also decreases.
Embodiment tri-
A kind of for spontaneous CO
2the formula that improves recovery ratio, its components in mass portion number comprises: carbonic hydroammonium accounts for 10 parts, 5 parts of cocamidopropyl propyl amide decil lactones, 25 ℃ of water account for 85 parts.
Amount of preparation is 100m
3.Directly inject stratum, formation temperature is 60 ℃, by stratum heat, is decomposed and is generated 7m
3cO
2.Reducing under the prerequisite of equipment cost, obtained good effect of increasing production, and water content in crude oil also decreases.
Embodiment tetra-
A kind of for spontaneous CO
2the formula that improves recovery ratio, its components in mass portion number comprises: carbonic hydroammonium accounts for 10 parts, 6 parts of neopelexes, 20 ℃ of water account for 84 parts.
Amount of preparation is 200m
3.Directly inject stratum, formation temperature is 65 ℃, by stratum heat, is decomposed and is generated 15m
3cO
2.Reducing under the prerequisite of equipment cost, obtained good effect of increasing production, and water content in crude oil also decreases.
Claims (6)
1. one kind for spontaneous CO
2the formula that improves recovery ratio, is characterized in that, its components in mass portion number comprises: carbonic hydroammonium accounts for 5-30 part, and activating agent accounts for 1-10 part, and surplus is to be no more than the water of 35 ℃; Described activating agent is the conventional anion in oil field, cation, nonionic surface active agent.
2. according to claim 1 a kind of for spontaneous CO
2improve the formula of recovery ratio, it is characterized in that, the conventional anion in described oil field, cation, nonionic surface active agent comprise lauryl sodium sulfate, sodium dodecylbenzenesulfonate, lauroyl amido CAB or cocamidopropyl propyl amide decil lactone.
3. according to claim 1 and 2 a kind of for spontaneous CO
2the formula that improves recovery ratio, is characterized in that, its components in mass portion number comprises: carbonic hydroammonium accounts for 5 parts, and lauryl sodium sulfate accounts for 2 parts, and 30 ℃ of water account for 93 parts.
4. according to claim 1 and 2 a kind of for spontaneous CO
2the formula that improves recovery ratio, is characterized in that, its components in mass portion number comprises: carbonic hydroammonium accounts for 10 parts, and lauroyl amido CAB accounts for 2 parts, and 25 ℃ of water account for 88 parts.
5. according to claim 1 and 2 a kind of for spontaneous CO
2the formula that improves recovery ratio, is characterized in that, its components in mass portion number comprises: carbonic hydroammonium accounts for 10 parts, 5 parts of cocamidopropyl propyl amide decil lactones, and 25 ℃ of water account for 85 parts.
6. according to claim 1 and 2 a kind of for spontaneous CO
2the formula that improves recovery ratio, is characterized in that, its components in mass portion number comprises: carbonic hydroammonium accounts for 10 parts, 6 parts of neopelexes, and 20 ℃ of water account for 84 parts.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310726490.9A CN103711467A (en) | 2013-12-25 | 2013-12-25 | Formula for improving recovery ratio of authigenic CO2 |
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|---|---|---|---|
| CN201310726490.9A CN103711467A (en) | 2013-12-25 | 2013-12-25 | Formula for improving recovery ratio of authigenic CO2 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104498013A (en) * | 2014-09-18 | 2015-04-08 | 成都孚吉科技有限责任公司 | Self-foaming-type foaming drainage agent and preparation method thereof |
| CN108690595A (en) * | 2018-03-23 | 2018-10-23 | 北京捷贝通石油技术股份有限公司 | A kind of method that oil/gas well natural occuring bubbles foam energization improves recovery ratio |
| CN109538178A (en) * | 2019-01-15 | 2019-03-29 | 西南石油大学 | Spontaneous CO in a kind of layer2Inflating medium system preferred embodiment |
| CN110343515A (en) * | 2018-04-03 | 2019-10-18 | 中国石油化工股份有限公司 | Like salt oil displacement agent and combinations thereof and the application in the displacement of reservoir oil of stratum |
| CN111119824A (en) * | 2019-12-25 | 2020-05-08 | 中国石油天然气股份有限公司 | Method for improving steam huff and puff later development effect of thickened oil |
| CN112443301A (en) * | 2020-12-02 | 2021-03-05 | 西安石油大油气科技有限公司 | Method for improving crude oil recovery ratio by integrating oil displacement and pressure reduction |
| CN112761608A (en) * | 2021-02-08 | 2021-05-07 | 西南石油大学 | Method for improving shale oil recovery ratio and reducing fracturing fluid flowback in pressure flooding integrated mode |
| CN114517086A (en) * | 2022-01-26 | 2022-05-20 | 中国石油大学(北京) | Multifunctional fracturing fluid composition, multifunctional fracturing fluid, and preparation method and application thereof |
| CN115012897A (en) * | 2022-06-29 | 2022-09-06 | 西南石油大学 | Method for improving shale oil recovery ratio |
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| CN103396776A (en) * | 2013-07-12 | 2013-11-20 | 西安石油大学 | Self-generating foam blocking removal agent for oil-water well and blocking removal process |
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| US6613720B1 (en) * | 2000-10-13 | 2003-09-02 | Schlumberger Technology Corporation | Delayed blending of additives in well treatment fluids |
| CN102061158A (en) * | 2010-11-26 | 2011-05-18 | 华鼎鸿基采油技术服务（北京）有限公司 | Foam reinforcing polymer oil displacement agent and method |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104498013B (en) * | 2014-09-18 | 2017-10-24 | 成都孚吉科技有限责任公司 | It is a kind of from foaming type foaming water discharge agent and preparation method thereof |
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| CN108690595B (en) * | 2018-03-23 | 2021-02-26 | 捷贝通石油技术集团股份有限公司 | Method for increasing energy and improving recovery ratio of self-generated foam of oil and gas well |
| CN108690595A (en) * | 2018-03-23 | 2018-10-23 | 北京捷贝通石油技术股份有限公司 | A kind of method that oil/gas well natural occuring bubbles foam energization improves recovery ratio |
| CN110343515B (en) * | 2018-04-03 | 2022-04-12 | 中国石油化工股份有限公司 | Salt-loving oil-displacing agent, composition thereof and application thereof in stratum oil displacement |
| CN110343515A (en) * | 2018-04-03 | 2019-10-18 | 中国石油化工股份有限公司 | Like salt oil displacement agent and combinations thereof and the application in the displacement of reservoir oil of stratum |
| CN109538178A (en) * | 2019-01-15 | 2019-03-29 | 西南石油大学 | Spontaneous CO in a kind of layer2Inflating medium system preferred embodiment |
| CN111119824A (en) * | 2019-12-25 | 2020-05-08 | 中国石油天然气股份有限公司 | Method for improving steam huff and puff later development effect of thickened oil |
| CN112443301A (en) * | 2020-12-02 | 2021-03-05 | 西安石油大油气科技有限公司 | Method for improving crude oil recovery ratio by integrating oil displacement and pressure reduction |
| CN112761608A (en) * | 2021-02-08 | 2021-05-07 | 西南石油大学 | Method for improving shale oil recovery ratio and reducing fracturing fluid flowback in pressure flooding integrated mode |
| CN114517086A (en) * | 2022-01-26 | 2022-05-20 | 中国石油大学(北京) | Multifunctional fracturing fluid composition, multifunctional fracturing fluid, and preparation method and application thereof |
| CN115012897A (en) * | 2022-06-29 | 2022-09-06 | 西南石油大学 | Method for improving shale oil recovery ratio |
| CN115012897B (en) * | 2022-06-29 | 2023-11-21 | 西南石油大学 | Method for improving shale oil recovery ratio |
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Application publication date: 20140409 |