CN105080948A - Hydraulic fracturing environmental protection method - Google Patents
Hydraulic fracturing environmental protection method Download PDFInfo
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- CN105080948A CN105080948A CN201410208209.7A CN201410208209A CN105080948A CN 105080948 A CN105080948 A CN 105080948A CN 201410208209 A CN201410208209 A CN 201410208209A CN 105080948 A CN105080948 A CN 105080948A
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Abstract
The invention provides a hydraulic fracturing environmental protection method, relates to a shale oil and gas development environmental protection method, and in particular to the hydraulic fracturing environmental protection method. According to the method, conditioning fluid containing a large amount of clay minerals is injected into a reservoir stratum and a fracturing part, chemicals of hydraulic fracturing fluid are adsorbed, bonded and degraded and are permanently adsorbed and sealed in the deep portion of the stratum, and therefore environmental pollution of hydraulic fracturing is processed, and environmental protection is achieved.
Description
The present invention relates to the environment protection method of shale oil and gas development, especially a kind of environment protection method of fracturing.
So-called fracturing, refers to and injects parallel well to break through rammell by being mixed with sandstone with the water under high pressure of chemical substance, discharge shale gas.And these are by the rammell broken through, be very easily polluted by a large amount of chemical agents added in fracturing fluid, except this, chemical substance also causes the pollution to ground environment with outside of the fracturing fluid eliminating pit shaft.Like this, fracturing leaves environment hidden danger.
In addition, how to process, protection and the problem effectively utilizing water source are also huge challenges to each company setting foot in shale petrol resources exploitation.American is worrying this technology of fracturing by polluted source, and thinks that this technology brings great injury to environment.In Britain, the fracturing of natural gas, the past is all treated by as second-class citizen now.French Government has even promulgated ban to it.
The object of this invention is to provide a kind of environment protection method of fracturing; harmless treatment can be carried out to the fracturing fluid of discharging outside pit shaft; harmless treatment can be carried out again to by the reservoir of the shale oil and gas development of fracturing fluid pollution and pressure break part; reach the environmental protection to underground water etc., the utilization rate of water resource can also be improved simultaneously.
The present invention is achieved in that fracturing environment protection method first of the present invention can regard the extension of hydraulic fracturing technology and perfect as.
Current hydraulic fracturing technology is primarily of fracturing technique---realized by fracturing fluid; Support technology---realized by load fluid; Parallel well technology---bored by level and realize.And fracturing environmental protection technology of the present invention---be realized by the treatment fluid containing a large amount of clay material." treatment fluid " is key technology of the present invention.
This treatment fluid is by clay and clay rocks and mineral, comprise clay, clay rock, clayey mud stone, siltstone, shale ... for raw material is prepared from.
Specifically: first by the above-mentioned natural clay of cheapness and clayey ground in a large number, rock dust or native powder is processed as through ore dressing, aqua, emulsion, paste, mud and become treatment fluid is made, and under Injection Well, for the environmental treatment of reservoir and pressure break part with its powder and water mix.
Conducting powder material adds man-hour, can be processed into the powder of different granularities (fineness), and it be stored respectively, so that produce the treatment fluid of different denseness (viscosity).Also the fracturing fluid mix outside above-mentioned clayey soil powder or rock dust and eliminating pit shaft can be become treatment fluid, under Injection Well, the reservoir polluted for chemicals contained by fracturing fluid and the underground environment process of pressure break part.
Also the fracturing fluid outside all eliminating pit shafts can be coordinated with clayey powder under making treatment fluid Injection Well.Like this, the non-waste-emission of the ground environment outside pit shaft will be formed, thus realize earth's surface environmental protection.
Adopt get rid of fracturing fluid outside pit shaft and clay class rock dust or native powder mix time, can add certain supplementing water (adjustment water) through stirring, sedimentation is separable for " water " and " mud " two parts, water can recycle, thus improves the utilization rate of water resource.Its slurry content is used as treatment fluid, Injection Well fracturing part and contaminated reservoir.Its wellhole can be individual well, also may be more than one gang of wells, and it is at a distance of reaching several kilometers, and need like this to connect with Cemented filling, how to arrange, be known technology.
Core technology treatment fluid of the present invention, the natural earth stone of employing is all ground with clay minerals component, and includes all kinds of clay, and the treated activated clay of particle surface.
From the atomic structre of clay mineral, be a kind of loop chain tetrahedron six side stratum reticulare, which results in the complete of clay minerals, extremely completely flakey, hexagonal flake cleavage, and little shape crystal and fine particle particle characteristic.For this reason, clay minerals is made to be provided with natural decolouring, absorption, easily disperse, plasticity and caking property, energy adsorption of nitrogen, hydrogen sulfide, carbon dioxide, the multiple poisonous and harmful substance such as nitrogen dioxide and carcinogen, this give the treatment fluid be prepared from and possess energy oil suction, liposuction, absorption is organic, can degrade, the organic chemistry preparation that absorption hydrofrac fluid carries, chemicals etc., be injected into underground fracture part, and contaminated reservoir, can by its chemicals permanent set, absorb, bonding, cover, seal up for safekeeping at earth formation deep, object of the present invention can be reached.And hydraulic fracturing technology can be made to be tending towards perfect, make more exploitations carrying out shale oil gas better all over the world, promote the well-being of mankind.
In addition, in some sense, due to pouring into for the treatment of fluid, certain setting off and supporting role is had to reservoir, favourable to the control that issuable locality falls into earthquake of collapsing because supporting loss.
Claims (5)
1. fracturing is mixed with a large amount of chemical substance and has the water of viscosity higher to pour into rammell as fracturing fluid to carry out hydraulic pressure and break to discharge natural gas.Feature of the present invention is, take clay mineral as a kind for the treatment of fluid that raw material is prepared from, and pours into reservoir and pressure break part, to realize environmental protection and the pollution plot of fracturing.
2. according to claim 1, a kind for the treatment of fluid, it is characterized in that there is multiple poisonous and harmful substance and the carcinogens such as adsorption of nitrogen, hydrogen sulfide, carbon dioxide, nitrogen dioxide, energy oil suction, liposuction, absorption organic matter, can degrade, absorption hydrofrac fluid the organic chemistry preparation, chemicals etc. that carry, and be forever fixed, absorb, bond, seal up for safekeeping at earth formation deep.
3., according to claim 1, be that raw material is prepared from treatment fluid with clay mineral.It is characterized in that with natural, a large amount of and the clay of cheapness and clayey ground, through ore dressing, be processed into powder and water or be prepared from the fracturing fluid mix outside discharge pit shaft, with the treatment fluid being feature containing a large amount of clay mineral.
4., according to claim 3, with the fracturing fluid mix of discharging outside pit shaft, it is characterized in that wherein water can be recycled through stirring, sedimentation separation Cheng Shui and treatment fluid two parts, thus improve the utilization rate of water resource.
5. according to claim 3, be prepared from treatment fluid with the fracturing fluid mix got rid of outside pit shaft, it is characterized in that its treatment fluid being injected the reservoir under pit shaft and pressure break part, realize the non-waste-emission of fracturing, to protect aboveground ground surface environment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410208209.7A CN105080948A (en) | 2014-05-13 | 2014-05-13 | Hydraulic fracturing environmental protection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410208209.7A CN105080948A (en) | 2014-05-13 | 2014-05-13 | Hydraulic fracturing environmental protection method |
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| CN105080948A true CN105080948A (en) | 2015-11-25 |
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| CN201410208209.7A Pending CN105080948A (en) | 2014-05-13 | 2014-05-13 | Hydraulic fracturing environmental protection method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110159238A (en) * | 2019-01-27 | 2019-08-23 | 蒋里军 | With the environmental pollution of the shale Solid state fermentation hydraulic fracturing of hydraulic fracturing |
| CN111687206A (en) * | 2019-03-15 | 2020-09-22 | 中国石油化工股份有限公司 | In-situ enhanced biological ventilation restoration method for petroleum hydrocarbon polluted site |
| CN112403187A (en) * | 2020-11-19 | 2021-02-26 | 昆明理工大学 | Method for strengthening shale carbon dioxide adsorption performance and cooperatively storing nitrogen dioxide |
| CN113477687A (en) * | 2021-06-14 | 2021-10-08 | 中节能大地（杭州）环境修复有限公司 | Method for restoring low-permeability stratum contaminated soil through chemical oxidation in cooperation with hydraulic fracturing |
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| CN1915867A (en) * | 2006-09-06 | 2007-02-21 | 冯久志 | Treatment method for recovering inverted discharged pressing crack liquid |
| CN101475290A (en) * | 2009-01-21 | 2009-07-08 | 大庆油田有限责任公司 | Recovery processing process for fracturing return liquid |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110159238A (en) * | 2019-01-27 | 2019-08-23 | 蒋里军 | With the environmental pollution of the shale Solid state fermentation hydraulic fracturing of hydraulic fracturing |
| CN111687206A (en) * | 2019-03-15 | 2020-09-22 | 中国石油化工股份有限公司 | In-situ enhanced biological ventilation restoration method for petroleum hydrocarbon polluted site |
| CN112403187A (en) * | 2020-11-19 | 2021-02-26 | 昆明理工大学 | Method for strengthening shale carbon dioxide adsorption performance and cooperatively storing nitrogen dioxide |
| CN112403187B (en) * | 2020-11-19 | 2022-11-01 | 昆明理工大学 | Method for strengthening shale carbon dioxide adsorption performance and cooperatively storing nitrogen dioxide |
| CN113477687A (en) * | 2021-06-14 | 2021-10-08 | 中节能大地（杭州）环境修复有限公司 | Method for restoring low-permeability stratum contaminated soil through chemical oxidation in cooperation with hydraulic fracturing |
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Application publication date: 20151125 |