Unlock instant, AI-driven research and patent intelligence for your innovation.

Fracturing flow-back fluid recycling method

A technology of fracturing flowback fluid and treatment method, which is applied in filtration treatment, mining wastewater treatment, multi-stage water treatment, etc. It can solve the problem of unsatisfactory solid-liquid splitting effect, inconspicuous effect, and failure of fracturing flowback fluid to meet the second The standard requirements for re-use and other issues can be achieved to improve the effect of coagulation reaction, good solid-liquid separation effect, and ensure the effect of sterilization and disinfection

Inactive Publication Date: 2019-01-08
CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD +1
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the prior art represented by the above-mentioned patent documents, the effect of coagulation reaction on the fracturing flowback fluid is not obvious, which makes the subsequent solid-liquid splitting effect unsatisfactory
Ultimately, the indicators of the treated fracturing flowback fluid cannot meet the standard requirements for secondary utilization

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Send the pressure return liquid into the coagulation reactor for reaction, and add magnetic seeds, coagulant and coagulant aid in the reaction. The magnetic species is water treatment magnetic powder with a magnetic substance greater than 95%, and the particle size is less than 40 μm; both the coagulant and the coagulant are added in the form of a solution through a metering pump, and the concentration of the coagulant is 12%, and the concentration of the coagulant is 0.15%; when adding, first add 250ppm magnetic seeds and 20ppm coagulant, and stir for 3 minutes; then add 180ppm magnetic seeds and 5ppm coagulant, and reversely stir for 4 minutes.

[0028] (2) After completing step (1), solid-liquid separation is carried out; solid-liquid separation is realized by a magnetic separator, the diameter of the disk is 1400mm, the distance between the disks is 25mm, and the rotation speed of the disk is 2r / min.

[0029] (3) The liquid obtained in step (2) is filtered; firs...

Embodiment 2

[0036] (1) Send the pressure return liquid into the coagulation reactor for reaction, and add magnetic seeds, coagulant and coagulant aid in the reaction. The magnetic species is water treatment magnetic powder with a magnetic substance greater than 95%, and the particle size is less than 40 μm; both the coagulant and the coagulant are added in the form of a solution through a metering pump, and the concentration of the coagulant is 12%, and the concentration of the coagulant is 0.15%; when adding, first add 200ppm magnetic seeds and 50ppm coagulant, and stir for 2 minutes; then add 150ppm magnetic seeds and 3ppm coagulant, and reversely stir for 5 minutes.

[0037] (2) After completing step (1), solid-liquid separation is carried out; solid-liquid separation is realized by a magnetic separator, the diameter of the disk is 1500mm, the distance between the disks is 40mm, and the rotation speed of the disk is 0.5r / min.

[0038] (3) The liquid obtained in step (2) is filtered; fi...

Embodiment 3

[0045] (1) Send the pressure return liquid into the coagulation reactor for reaction, and add magnetic seeds, coagulant and coagulant aid in the reaction. The magnetic species is water treatment magnetic powder with a magnetic substance greater than 95%, and the particle size is less than 40 μm; both the coagulant and the coagulant are added in the form of a solution through a metering pump, and the concentration of the coagulant is 12%, and the concentration of the coagulant is 0.15%; when adding, first add 260ppm magnetic seeds and 40ppm coagulant, and stir for 4 minutes; then add 160ppm magnetic seeds and 6ppm coagulant, and reversely stir for 3 minutes.

[0046] (2) After completing step (1), solid-liquid separation is carried out; the solid-liquid separation is realized by a magnetic separator with a disk diameter of 1600mm, a disk spacing of 20mm, and a disk rotation speed of 3r / min.

[0047] (3) The liquid obtained in step (2) is filtered; first, primary filtration is p...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a fracturing flow-back fluid recycling method. The method is characterized by comprising the following steps: a, feeding the fracturing flow-back fluid into a coagulation reactor for reaction, and adding magnetic seeds, a coagulant and a coagulant aid during the reaction; b, performing solid-liquid separation on the reacted fracturing flow-back fluid; c, filtering the liquid obtained in the solid-liquid separation; d, sterilizing the filtered liquid; and e, dosing the sterilized liquid for reuse. The method improves the coagulation and solid-liquid separation effect, and realizes deep treatment of the fracturing flow-back fluid by multi-stage filtration and electrolyzed water sterilization, and the indexes of the obtained reuse liquid can meet the standard requirements of secondary utilization.

Description

technical field [0001] The invention relates to the technical field of recovery and utilization of fracturing fluid in the petroleum drilling industry. Background technique [0002] In oil and gas field operations, fracturing technology plays an important role. The fracturing flowback fluid not only contains a large amount of chemical additives, but also carries organic and inorganic compounds, bacteria, and heavy metals in the formation during the flowback process. There are many types of pollutants, complex components, high concentration, high viscosity, high COD, High mineralization and high stability, if not effectively treated, will cause serious pollution to the regional environment. [0003] At present, the treatment of flowback fluid can basically meet the discharge standard, but there is a lack of in-depth research on reuse. The parameter requirements for secondary use are much higher than the discharge standard. Direct reuse according to the existing treatment met...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/12C02F103/10
CPCC02F1/001C02F1/444C02F1/467C02F1/488C02F1/5236C02F1/56C02F9/00C02F2103/10C02F2301/08C02F2303/04
Inventor 何启平鲍晋石孝志陆丽孟照海
Owner CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD