A processing device and method for a flowback fracturing fluid

Abstract

The invention relates to the technical field of oilfield fracturing, and discloses a processing device for a flowback fracturing fluid. The device includes an oxidation viscosity-reducing reaction chamber, an oil-removing turbidity-reducing reaction chamber and a separating and settling chamber. The oxidation viscosity-reducing reaction chamber is in the oil-removing turbidity-reducing reaction chamber. The oil-removing turbidity-reducing reaction chamber is in the separating and settling chamber. The oxidation viscosity-reducing reaction chamber is communicated with a feeding apparatus. The oil-removing turbidity-reducing reaction chamber includes a mixing zone, a flocculation zone, a filtration zone and a clear water zone from bottom to top. An alkali liquid feeding pipe is in the mixing zone. The cross section of the flocculation zone is an inverted trapezoid. A waste dreg collecting barrel is disposed in the filtration zone and is communicated with the separating and settling chamber through an overflow pipe. The clear water zone is provided with a first water discharging pipe. The upper part of the separating and settling chamber is provided with a second water discharging pipe, and the lower part of separating and settling chamber is provided with a dreg discharging pipe. A processing method of the flowback fracturing fluid is also disclosed. The device is low in occupied space. The device and the method are low in processing cost and good in processing effects, and can be widely applied for processing and recycle of oilfield flowback fracturing fluids.

Description

technical field [0001] The invention relates to a waste water treatment device and method, in particular to a treatment device and method that can be reused after oil field fracturing flowback fluid is treated. Background technique [0002] With the development of the world economy, the demand for energy in countries around the world continues to increase, while the conventional oil and gas resources are increasingly depleted. new growth point. [0003] The development of unconventional oil and gas resources such as shale gas usually requires the use of multi-stage staged fracturing technology for large horizontal wells, thus requiring the use of a large amount of fracturing fluid. [0004] Due to the large amount of fluid used and flowback in the fracturing development process of the existing unconventional oil and gas resources, a large amount of fracturing waste fluid is produced, with complex components, high suspended solids and oil content. Fluctuating water quality,...

AI Technical Summary

Problems solved by technology

[0006] However, the fracturing fluid has high viscosity, complex composition, and difficult treatment. The existing treatment methods all have the disadvantages of large consumption of chemicals, complicated process, high treatment cost, and large floor area. Therefore, it is necessary to develop a method for the treatment and reuse of fracturing flowback fluid with good treatment effect, low cost and small footprint

Images