Comprehensive treatment method of shale gas extraction water

A treatment method and shale technology, applied in the field of formation produced water treatment, can solve problems such as being unsuitable for single-well small water volume wastewater treatment, difficult to survive high-chlorine wastewater, and produced water reinjection restrictions, etc., and achieve catalytic activity that can be reused , high environmental protection and economic benefits, low microwave source loss
CN106032301AInactive Publication Date: 2016-10-19CHINA PETROLEUM & CHEM CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA PETROLEUM & CHEM CORP
Publication Date
2016-10-19
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a comprehensive treatment method of shale gas extraction water. The method is characterized by comprising: (1) adjusting the pH value of shale gas extraction water to 2.5-5; (2) performing contacting of the pH value-adjusted material, a catalyst and an oxidant under microwave irradiation, and carrying out a microwave catalysis oxidation reaction; (3) adjusting the pH value of the material obtained through the microwave catalysis oxidation to 7.5-12 so as to obtain a suspension; (4) carrying out solid-liquid separation on the suspension to obtain a supernatant and a solid; and (5) carrying out a microwave pressure reducing treatment on the obtained supernatant, and carrying out a harmless treatment on the solid and the remaining residue obtained through the microwave pressure reducing treatment. With the technical scheme of the present invention, the shale gas extraction water can be efficiently treated, the contents of the chlorine ions and other impurities in the treated extraction water are substantially reduced, the treated extraction water can meet the discharge standard or can be recovered and utilized, and the treatment process is simple and effective.
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Description

technical field

[0001] The invention relates to the field of wastewater treatment, in particular to a treatment method for stratum produced water brought out during shale gas exploitation. Background technique

[0002] Shale gas is an unconventional natural gas resource, which occurs in organic-rich shale and its interlayers, and exists mainly in the state of adsorption or free. In recent years, due to breakthroughs in shale gas exploration and development technology in the United States and rapid growth in production, it has had a major impact on the international natural gas market and the world's energy structure. The world's major oil and gas resource countries have increased their efforts in shale gas exploration and development. As the country with the largest shale gas reserves in the world, China is undoubtedly the next main battlefield of the global shale gas revolution. At the same time, the environmental problems brought about by shale gas development, especially...

Claims

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