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Fracturing flow-back fluid recycling treatment process

A technology for recovery and treatment of fracturing flowback fluid, which is applied in the fields of mining wastewater treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. Issues such as online recycling, processing equipment and large storage tanks

Inactive Publication Date: 2018-03-27
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the technical problems in the prior art that the fracturing flowback fluid cannot be recycled and reused online, pollutes the environment and has high cost, the previous fracturing flowback fluid treatment process takes a long time, and the processing equipment and storage tank occupy an area big problem

Method used

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  • Fracturing flow-back fluid recycling treatment process

Examples

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Comparison scheme
Effect test

Embodiment 1

[0021] Such as figure 1 As shown, a fracturing flowback fluid recovery treatment process includes a fracturing wellhead 1, and is characterized in that it also includes a high-pressure gas-liquid separator 2, a cartridge filter 3, a gas combustion tank 4, a sterilization treatment device 5, and a pH Value adjustment and metal ion precipitation device 6, flocculation and sedimentation device 7, low-pressure three-phase separator 8, fine filter 9, liquid storage tank 10 and sand collection tank 11, the outlet of the fracturing wellhead 1 is connected to high-pressure gas-liquid separation The inlet of device 2, the outlet of high-pressure gas-liquid separator 2 connect the inlet of filter cartridge filter 3 and the inlet of sterilizing treatment device 5 respectively, the outlet of filter cartridge filter 3 connects the inlet of gas combustion tank 4, and the inlet of sterilizing treatment device 5 The outlet is sequentially connected to the pH value adjustment and metal ion pre...

Embodiment 2

[0023] Such as figure 1 As shown, on the basis of Example 1, the high-pressure gas-liquid separator 2 is provided with a cyclone separation element and a grit chamber. The high-pressure gas-liquid separator has the function of cyclone sand removal, and is provided with a cyclone separation element and a grit chamber. When the high-pressure fluid passes through the cyclone separation element, under the action of centrifugal force and gravity, the liquid and solid sand enter the settling In the tank, the gas enters the gas combustion tank from the upper pipeline, and the structure is simple; when the gas separated by the high-pressure gas-liquid separator 2 contains less solids, it can be directly connected to the gas combustion tank 4 instead of passing through the cartridge filter 3 for sand removal.

[0024] Further, the cartridge filter 3 includes a two-stage filter device, the first-stage filter device is a sand removal bucket and the gas enters the sand removal bucket alo...

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Abstract

The invention belongs to the technical field of waste water treatment and reuse in exploitation of oil and gas fields, and concretely relates to a fracturing flow-back fluid recycling treatment process. The fracturing flow-back fluid recycling treatment process is characterized by comprising a fracturing well head, a high-pressure gas-liquid separation device, a filtering cylinder filter, a gas combustion pot, a sterilization processing apparatus, a pH value adjusting and metal ion deposition apparatus, a flocculating settling apparatus, a low-pressure three-phase separator, a fine filter, a liquid storage tank, and a sand collection pot, the technical problem that fracturing flow-back fluid cannot be subjected to on-line recovery and re-utilization can be solved, and the problems that pollution environment and cost are high, the time consuming of the treatment process in the prior art for the fracturing flow-back fluid is long, and land occupation of processing equipment and the liquid storage tank is large can be solved. The treatment process realizes fine recycling of the fracturing flow-back fluid and on-line processing and recycling of the fracturing flow-back fluid, reliabledegree of the treatment process is high, operation is simple, on-site enforcement performance is strong, the processed flow-back fluid is used for fluid preparation construction, application propertyis stable, liquid sand-carrying capacity is strong, utilization rate of the flow-back fluid can achieve 98%, and on-site construction cycle is shortened.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment and reuse in oil and gas field exploitation, and in particular relates to a recovery and treatment process for fracturing flowback fluid. Background technique [0002] A large amount of fracturing fluid needs to be used in oil field fracturing construction, and a large amount of fracturing flowback fluid is generated, which needs to be treated. The traditional treatment method is generally to discharge to the mud pool of the well site, or to be transported to the sewage treatment station by tanker. The one-time use and post-treatment of the fracturing fluid bring huge cost pressure and environmental protection pressure to the enterprise. [0003] With the implementation of the new "Environmental Protection Law", oil and gas field drilling fluid and fracturing fluid are required to be treated without landing. The traditional fracturing flowback fluid treatment method cannot meet the ne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F103/10
Inventor 温哲豪白建文牟春国李达马得华邝聃贾建鹏梁凌云滕飞启薛亚斐朱李安衣德强张家富陈晓丽崔云群傅鹏王嘉鑫吴明松何平朱更更
Owner PETROCHINA CO LTD
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