CN109762549A - A kind of efficient automatic gas-producing foam fracturing fluid and construction method - Google Patents
A kind of efficient automatic gas-producing foam fracturing fluid and construction method Download PDFInfo
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- CN109762549A CN109762549A CN201910079368.4A CN201910079368A CN109762549A CN 109762549 A CN109762549 A CN 109762549A CN 201910079368 A CN201910079368 A CN 201910079368A CN 109762549 A CN109762549 A CN 109762549A
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Abstract
The present invention provides a kind of efficient automatic gas-producing foam fracturing fluid and construction method, the foam fracturing fluid by base fluid, produce gas-liquid and heat production agent forms, wherein base fluid, to produce gas-liquid and the mass ratio of heat production agent be 100:(30-42): (5-9).Base fluid and production gas-liquid example in mass ratio are pumped into underground by fracturing blender truck sucking together when construction, heat production agent is pumped into underground with proppant.The present invention does not need to carry out liquid nitrogen with note, and simplifying site technique reduces construction cost, reaches increase stratum energy by the bulk gas that chemical reaction generates, improves reservoir liquid flow capacity, increase the purpose of yield.A large amount of inertia safe gas can be quickly generated, and the toxic gas of nitrogen oxides will not be generated, reduce construction risk, the alkaline environment that simultaneous reactions product generates is conducive to the anti-corrosion of fracturing fluid plastic and down-hole string.By generating foam, stratum net pressure is improved using Jamin effect, quickly the row of returning, earth formation deep heat production can promote broken glue, reduce fracturing fluid to reservoir damage.
Description
Technical field
The present invention relates to field of petroleum exploitation, in particular to a kind of efficient automatic gas-producing foam fracturing fluid and construction method.
Background technique
Pressure break is one of main means of reservoir reconstruction.During the fracturing reform to the saturating stratum of low pressure and low permeability, a side
Face fracturing fluid recovery (backflow) energy is insufficient, causes big quantity of fluid after construction to stay in stratum, to cause a degree of wound to stratum
Evil, influences fracturing yield increasing effect.On the other hand, in this kind of stratum development process, it is desirable to be able to be carried out by injection gas
Stratum energy supplement, to improve oil and gas production.For solution both of these problems, generallys use whole liquid nitrogen companion and infuse, but liquid nitrogen
Biggish trouble is brought to site operation with note, and liquid nitrogen storage also increases liquid nitrogen car and liquid nitrogen there is also larger problem
Also there is the phenomenon that adding the termination of pumping of sand midway due to liquid nitrogen pump vehicle and liquid nitrogen manifold leak, seriously affected in pump truck ground cost of use
Fracturing effect.
China Patent Publication No.: CN 103265938 B of 102627960 B and CN provides natural occuring bubbles foam fracturing fluid
And class A foam A pressure break system, it is to be reacted in acid condition using sodium nitrite and ammonium chloride, when reaction releases a large amount of
Inert gas, increases the pressure of reservoir, while reducing " liquid nitrogen is with note ", reduces operating expenses, simplifies working procedure,
Avoid the safety problem that liquid nitrogen storage causes.In real reaction because catalyst and wellbore fluid condition difference it is big (pH=3~
5) it, not only needs under acidic environment or generates that there is corrosive by-product, the by-products such as nitric oxide easily generated, toxicity
Greatly, poorly soluble needs to consider explosion-proof in natural gas production, and there are security risks.
Summary of the invention
In order to overcome the by-products such as existing nitric oxide easily generated, toxicity is big, and poorly soluble has security risk,
The present invention provides a kind of efficient automatic gas-producing foam fracturing fluid and construction method, the present invention by introducing highly effective and safe chemical reaction,
The gas safety of generation is controllable, quickly forms high quality foam, and foam fracturing fluid is made, and stratum is being transformed simultaneously, is playing energization
The row's of helping double effects reduce formation blockage injury, to achieve the purpose that improve yield.
The technical solution adopted by the present invention are as follows:
A kind of efficient automatic gas-producing foam fracturing fluid, the foam fracturing fluid by base fluid, produce gas-liquid and heat production agent and form, wherein base fluid,
The mass ratio for producing gas-liquid and heat production agent is 100:(30-42): (5-9).
Base fluid, production gas-liquid and the mass ratio of heat production agent is 100:35:7.
The base fluid forms by weight are as follows: thickening drag reducer 8-10 parts, 30-50 parts of sodium azide, foaming agent 3-12
Part, 2-6 parts of clay stabilizer, 1500-2000 parts of water.
The production gas-liquid forms by weight are as follows: 10-20 parts of sodium hypochlorite, 5-8 parts of potassium nitrate, 700-800 parts of water.
The heat production agent is calcium oxide.
The thickening drag reducer is polyacrylamide EM30, EM30S.
A kind of construction method of efficient automatic gas-producing foam fracturing fluid, specific steps are as follows: base fluid and production gas-liquid are carried out first
Then base fluid and production gas-liquid are proportionally pumped into underground, heat production agent are finally pumped into underground in proportion by configuration.
The base fluid is prepared are as follows: will be thickened drag reducer 8-10 parts, 30-50 parts of sodium azide, foaming agent 3- by weight
12 parts, 2-6 parts of clay stabilizer, 1500-2000 parts of water be mixed to get base fluid；It produces gas-liquid to prepare: by weight by gradation chloric acid
10 parts -20 parts of sodium, 5-8 parts of potassium nitrate, 700-800 parts of water be mixed to get production gas-liquid.
The base fluid and production gas-liquid is proportionally pumped into underground by fracturing blender truck sucking together.
The beneficial effects of the present invention are:
A kind of efficient automatic gas-producing foam fracturing fluid provided by the invention does not need to carry out liquid nitrogen with note, simplifies site technique, subtract
Lack construction cost, increase stratum energy reached by the bulk gas that chemical reaction generates, improves reservoir liquid flow capacity,
Increase the purpose of yield.
A kind of efficiently self-produced gas foam energization fracturing fluid provided by the invention, the sodium azide of selection and hypochlorous chemistry
Reaction, can quickly generate a large amount of inertia safe gas, rapider compared to conventional chlorinating ammonium and reacting for sodium nitrite, not
The toxic gas of nitrogen oxides can be generated, construction risk is reduced, the alkaline environment that simultaneous reactions product generates is conducive to fracturing fluid
The anti-corrosion of plastic and down-hole string.
A kind of efficient automatic gas-producing foam fracturing fluid provided by the invention is improved by generating foam using Jamin effect
Stratum net pressure, can the quick row of returning, reduce fracturing fluid to reservoir damage.
A kind of efficient automatic gas-producing foam fracturing fluid provided by the invention can be in ground layer depth as heat production agent is added in proppant
Portion's proppant arrives place and generates heat, promotes broken glue oxidation reaction, reduces and be detained injury.
Specific embodiment
Embodiment 1:
In order to overcome the by-products such as existing nitric oxide easily generated, toxicity is big, and poorly soluble has security risk, this hair
Bright to provide a kind of efficient automatic gas-producing foam fracturing fluid and construction method, the present invention is generated by introducing highly effective and safe chemical reaction
Gas safety it is controllable, quickly form high quality foam, be made foam fracturing fluid, transformation stratum simultaneously, play energization help row
Double effects reduce formation blockage injury, to achieve the purpose that improve yield.
A kind of efficient automatic gas-producing foam fracturing fluid provided in the present invention, the foam fracturing fluid is by base fluid, production gas-liquid and production
Thermit powder composition, wherein the mass ratio of base fluid, production gas-liquid and heat production agent is 100:(30-42): (5-9).
In the present embodiment, base fluid, produce gas-liquid, heat production agent mass ratio be 100: 30:5；Wherein, the base fluid is by weight
Composition are as follows: thickening drag reducer EM30 is 8 parts, 30 parts of sodium azide, 3 parts of foaming agent, 2 parts of clay stabilizer, 1500 parts of water；The production
Gas-liquid forms by weight are as follows: 10 parts of sodium hypochlorite, potassium nitrate 5,700 parts of water；Heat production agent is calcium oxide.
Foaming agent, clay stabilizer are all using chemical industry additive common known in oil field in the present invention.In the present invention
It will not be described in more detail.
In the present embodiment, base fluid and production gas-liquid are pumped into underground by fracturing blender truck sucking in proportion together, measured in proportion
Heat production agent is pumped into underground with proppant.After liquid enters underground, reaction temperature is formation temperature, about 45-65 DEG C, is occurred
Air-generating reaction:
Every liter of automatic gas-producing foam fracturing fluid produces gas 100-150L, in underground foaming agent solution under the flow-disturbing effect of gas, generates
A large amount of bubbles, under the action of being thickened drag reducer, foaming agent solution viscosity is high, and it is good to be formed by foam quality, long half time.?
Under the Jamin effect of foam, higher crack net pressure is generated, improves reservoir reconstruction underground complexity.Reach energization simultaneously to help
The effect of row.
After entering underground exothermic reaction occurs for heat production agent:
The gel breaker in deep is good in formation absorption heat, discharges more radical ions, reaches preferably broken glue effect.
A kind of efficient automatic gas-producing foam fracturing fluid provided by the invention and construction method do not need to carry out liquid nitrogen with note, letter
Site technique is changed, has reduced construction cost, increase stratum energy is reached by the bulk gas that chemical reaction generates, improves storage
Layer liquid flow capacity, increases the purpose of yield.The present invention can quickly generate a large amount of inertia safe gas, compared to conventional chlorinating
Ammonium and reacting for sodium nitrite are rapider, can't generate the toxic gas of nitrogen oxides, reduce construction risk, simultaneous reactions
The alkaline environment that product generates is conducive to the anti-corrosion of fracturing fluid plastic and down-hole string.By generating foam, Jamin effect is utilized
Stratum net pressure is improved, quickly the row of returning, earth formation deep heat production can promote broken glue, reduce fracturing fluid to reservoir damage.
Embodiment 2:
A kind of efficient automatic gas-producing foam fracturing fluid provided in the present invention, the foam fracturing fluid is by base fluid, production gas-liquid and heat production agent
Composition, in the present embodiment, base fluid, produce gas-liquid, the mass ratio of heat production agent is 100: 35:7；Wherein, base fluid group by weight
Become: thickening drag reducer EM30S is 9 parts, 40 parts of sodium azide, 6 parts of foaming agent, 4 parts of clay stabilizer, 1700 parts of water；The production
Gas-liquid forms by weight are as follows: 15 parts of sodium hypochlorite, 7 parts of potassium nitrate, 800 parts of water；Heat production agent is calcium oxide.
In the present embodiment, base fluid and production gas-liquid are pumped into underground by fracturing blender truck sucking in proportion together, measured in proportion
Heat production agent is pumped into underground with proppant.After liquid enters underground, reaction temperature is formation temperature, about 45-65 DEG C, is occurred
Air-generating reaction:
Every liter of automatic gas-producing foam fracturing fluid produces gas 100-150L, in underground foaming agent solution under the flow-disturbing effect of gas, generates
A large amount of bubbles, under the action of being thickened drag reducer, foaming agent solution viscosity is high, and it is good to be formed by foam quality, long half time.?
Under the Jamin effect of foam, higher crack net pressure is generated, improves reservoir reconstruction underground complexity.Reach energization simultaneously to help
The effect of row.
After entering underground exothermic reaction occurs for heat production agent:
The gel breaker in deep is good in formation absorption heat, discharges more radical ions, reaches preferably broken glue effect.
The present invention does not need to carry out liquid nitrogen with note, simplifies site technique, reduces construction cost, is produced by chemical reaction
Raw bulk gas reaches increase stratum energy, improves reservoir liquid flow capacity, increases the purpose of yield.The present invention can be fast
Fast-growing is rapider compared to conventional chlorinating ammonium and reacting for sodium nitrite at a large amount of inertia safe gas, can't generate nitrogen oxygen
The toxic gas of compound, reduces construction risk, and the alkaline environment that simultaneous reactions product generates is conducive to fracturing fluid plastic and underground
The anti-corrosion of tubing string.By generating foam, stratum net pressure is improved using Jamin effect, can quickly the row of returning, earth formation deep be produced
Heat promotes broken glue, reduces fracturing fluid to reservoir damage.
Embodiment 3:
A kind of efficient automatic gas-producing foam fracturing fluid provided in the present invention, the foam fracturing fluid is by base fluid, production gas-liquid and heat production agent
It forms, in the present embodiment, base fluid produces gas-liquid, heat production agent composition, mass ratio 100: 42:9；Wherein, the base fluid is by weight
Composition are as follows: thickening drag reducer EM30 is 10 parts, 50 parts of sodium azide, 12 parts of foaming agent, 6 parts of clay stabilizer, 2000 parts of water；It should
It produces gas-liquid to form by weight are as follows: 20 parts of sodium hypochlorite, 8 parts of potassium nitrate, 800 parts of water；Heat production agent is calcium oxide.
In the present embodiment, base fluid and production gas-liquid are pumped into underground by fracturing blender truck sucking in proportion together, measured in proportion
Heat production agent is pumped into underground with proppant.After liquid enters underground, reaction temperature is formation temperature, about 45-65 DEG C, is occurred
Air-generating reaction:
Every liter of automatic gas-producing foam fracturing fluid produces gas 100-150L, in underground foaming agent solution under the flow-disturbing effect of gas, generates
A large amount of bubbles, under the action of being thickened drag reducer, foaming agent solution viscosity is high, and it is good to be formed by foam quality, long half time.?
Under the Jamin effect of foam, higher crack net pressure is generated, improves reservoir reconstruction underground complexity.Reach energization simultaneously to help
The effect of row.
After entering underground exothermic reaction occurs for heat production agent:
The gel breaker in deep is good in formation absorption heat, discharges more radical ions, reaches preferably broken glue effect.
The present invention can quickly generate a large amount of inertia safe gas, compared to reacting more for conventional chlorinating ammonium and sodium nitrite
Rapidly, the toxic gas of nitrogen oxides can't be generated, construction risk is reduced, the alkaline environment that simultaneous reactions product generates is advantageous
In fracturing fluid plastic and the anti-corrosion of down-hole string.By generation foam, stratum net pressure is improved using Jamin effect, it can be fast
Speed returns row, and earth formation deep heat production promotes broken glue, reduces fracturing fluid to reservoir damage.The present invention does not need to carry out liquid nitrogen companion's note,
Site technique is simplified, construction cost is reduced, increase stratum energy is reached by the bulk gas that chemical reaction generates, is improved
Reservoir liquid flow capacity increases the purpose of yield.
Embodiment 4:
Based on the technical of above-mentioned 1-3 embodiment, a kind of construction party of efficient automatic gas-producing foam fracturing fluid is provided in the present embodiment
Method, specific steps are as follows: base fluid and production gas-liquid are configured first, base fluid and production gas-liquid are proportionally then pumped into underground,
Heat production agent is finally pumped into underground in proportion.
The base fluid forms by weight are as follows: thickening drag reducer 8-10 parts, 30-50 parts of sodium azide, foaming agent 3-12
Part, 2-6 parts of clay stabilizer, 1500-2000 parts of water.The base fluid is prepared are as follows: will be thickened by weight drag reducer 8-10 parts,
3-12 parts of foaming agent of 30-50 parts of sodium azide, 2-6 parts of clay stabilizer, 1500-2000 parts of water be mixed to get base fluid.
The production gas-liquid forms by weight are as follows: 10-20 parts of sodium hypochlorite, 5-8 parts of potassium nitrate, 700-800 parts of water.It produces
Gas-liquid is prepared: 10 parts -20 parts of gradation sodium chlorate, 5-8 parts of potassium nitrate, 700-800 parts of water being mixed to get production gas-liquid by weight.
The base fluid and production gas-liquid is proportionally pumped into underground by fracturing blender truck sucking together.
The heat production agent is calcium oxide.
The thickening drag reducer is polyacrylamide EM30, EM30S.
The efficient self-produced gas foam energization fracturing fluid of above-described embodiment 1-3 composition, base fluid produce gas-liquid, heat production agent mass ratio
Be 100: (30-42): (5-9) at the scene in application, be pumped into well by fracturing blender truck sucking in proportion for base fluid and production gas-liquid together
Under, then by the heat production agent of proportional quantities as proppant is pumped into underground.After liquid enters underground, reaction temperature is formation temperature, about
It is 45-65 DEG C, air-generating reaction occurs:
Every liter of automatic gas-producing foam fracturing fluid produces gas 100-150L, in underground foaming agent solution under the flow-disturbing effect of gas, generates
A large amount of bubbles, under the action of being thickened drag reducer, foaming agent solution viscosity is high, and it is good to be formed by foam quality, long half time.?
Under the Jamin effect of foam, higher crack net pressure is generated, improves reservoir reconstruction underground complexity.Reach energization simultaneously to help
The effect of row.
After entering underground exothermic reaction occurs for heat production agent:
The gel breaker in deep is good in formation absorption heat, discharges more radical ions, reaches preferably broken glue effect.
Foaming agent, clay stabilizer are all using chemical industry additive common known in oil field in the present invention.In the present invention
It will not be described in more detail.
The foregoing examples are only illustrative of the present invention, does not constitute the limitation to protection scope of the present invention, all
It is within being all belonged to the scope of protection of the present invention with the same or similar design of the present invention.It is the technique of detailed description in the present invention
And additive is the prior art, will be no longer further detailed in the present invention.
Claims (9)
1. a kind of efficient automatic gas-producing foam fracturing fluid, it is characterised in that: the foam fracturing fluid is by base fluid, production gas-liquid and heat production agent group
At wherein the mass ratio of base fluid, production gas-liquid and heat production agent is 100:(30-42): (5-9).
2. a kind of efficient automatic gas-producing foam fracturing fluid according to right 1, it is characterised in that: the base fluid, produce gas-liquid and
The mass ratio of heat production agent is 100:35:7.
3. a kind of efficient automatic gas-producing foam fracturing fluid according to right 1, it is characterised in that: base fluid group by weight
Become: thickening drag reducer 8-10 parts, 30-50 parts of sodium azide, 3-12 parts of foaming agent, 2-6 parts of clay stabilizer, water 1500-
2000 parts.
4. a kind of efficient automatic gas-producing foam fracturing fluid according to right 1, it is characterised in that: the production gas-liquid is by weight
Composition are as follows: 10-20 parts of sodium hypochlorite, 5-8 parts of potassium nitrate, 700-800 parts of water.
5. a kind of efficient automatic gas-producing foam fracturing fluid according to right 1, it is characterised in that: the heat production agent is oxidation
Calcium.
6. a kind of efficient automatic gas-producing foam fracturing fluid according to right 1, it is characterised in that: the thickening drag reducer is poly-
Acrylic amide EM30, EM30S.
7. the construction method of any one efficient automatic gas-producing foam fracturing fluid according to right 1-6, it is characterised in that: specific
Step are as follows: first to base fluid and produce gas-liquid configure, then by base fluid and produce gas-liquid be proportionally pumped into underground, finally by than
Heat production agent is pumped into underground by example.
8. a kind of construction method of efficient automatic gas-producing foam fracturing fluid according to right 7, it is characterised in that: the base fluid
It prepares are as follows: drag reducer 8-10 parts, 30-50 parts of sodium azide, 3-12 parts of foaming agent, clay stabilizer 2-6 will be thickened by weight
Part, 1500-2000 parts of water be mixed to get base fluid；It produces gas-liquid to prepare: by weight by 10 parts -20 parts of gradation sodium chlorate, potassium nitrate
5-8 parts, 700-800 parts of water are mixed to get production gas-liquid.
9. a kind of construction method of efficient automatic gas-producing foam fracturing fluid according to right 7, it is characterised in that: the base fluid
Underground is proportionally pumped by fracturing blender truck sucking together with gas-liquid is produced.
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Cited By (6)
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| CN112280549A (en) * | 2020-09-28 | 2021-01-29 | 长江大学 | Nano emulsion and fracturing method |
| CN112459761A (en) * | 2020-11-28 | 2021-03-09 | 濮阳华成恒业石油技术开发有限公司 | Temporary plugging acid fracturing method |
| CN113107454A (en) * | 2021-05-12 | 2021-07-13 | 刘常青 | Reservoir transformation method and application of normal-pressure shale gas horizontal well |
| CN114215497A (en) * | 2021-12-17 | 2022-03-22 | 中国科学院地质与地球物理研究所 | Method for injecting calcium oxide powder into stratum |
| CN114479820A (en) * | 2022-02-10 | 2022-05-13 | 四川申和新材料科技有限公司 | Self-heating composite foam fracturing fluid capable of being controlled in real time and field construction method |
| CN115977604A (en) * | 2023-02-24 | 2023-04-18 | 陕西中立合创能源科技有限责任公司 | Shale oil nano-imbibition energizing fracturing method |
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| CN113107454A (en) * | 2021-05-12 | 2021-07-13 | 刘常青 | Reservoir transformation method and application of normal-pressure shale gas horizontal well |
| CN114215497A (en) * | 2021-12-17 | 2022-03-22 | 中国科学院地质与地球物理研究所 | Method for injecting calcium oxide powder into stratum |
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| CN114479820B (en) * | 2022-02-10 | 2023-09-01 | 四川申和新材料科技有限公司 | Self-heating composite foam fracturing fluid capable of being controlled in real time and field construction method |
| CN115977604A (en) * | 2023-02-24 | 2023-04-18 | 陕西中立合创能源科技有限责任公司 | Shale oil nano-imbibition energizing fracturing method |
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