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

Method and device for recovery, treatment and reuse of fracturing flowback fluid

A technology for recovery and treatment of fracturing flowback fluid, applied in chemical instruments and methods, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc. Discharge liquid can be reused, flowback liquid cannot be recycled and reused, etc., to achieve the effect of saving water and materials for liquid preparation, reducing the amount of harmless treatment, and convenient disassembly and transportation

Active Publication Date: 2016-12-07
PETROCHINA CO LTD
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the commonly used fracturing fluid flowback treatment systems mainly fall into the following two categories. One is to flocculate all polymer substances and residual additives in the fracturing fluid flowback fluid through electrochemical, flocculation, oxidation and other methods. , Oxidation treatment, turn into clean water that meets the industrial discharge standards, the water quality meets the discharge requirements, and various residual additives that can be reused in the flowback fluid are wasted, the treatment cost is high, and the treatment period is long; the second is to flow back the fracturing fluid After simple sedimentation to remove mechanical impurities, additives lost due to formation adsorption or degradation are supplemented to meet the performance requirements of re-fracturing construction, so as to realize recycling and reuse. The treatment method is simple, but only for The fracturing fluid containing a small amount of condensate oil and formation water is recovered, and only the flowback fluid in the early stage of flowback (accounting for about 10% to 20% of the total flowback fluid volume) can be recovered, and large-scale recovery of flowback fluid cannot be realized , there is still a large amount of flowback liquid that cannot be recycled and reused

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method and device for recovery, treatment and reuse of fracturing flowback fluid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1: as figure 1 As shown, a fracturing flowback fluid recovery, treatment and reuse device, including grit degreasing tank 1, deionization tank 7, filter tank 10, special adjustment tank 12 for fracturing flowback fluid and fracturing flowback fluid If the special liquid storage tank is 16.

[0026] The grit degreasing tank 1 is connected with a first pump 2, a first flow meter 3 and a first valve 4, and the treated liquid is pumped into the deionization tank 7 according to a certain flow rate; the deionization tank 7 has its own deionization tank The second valve 8 at the bottom is externally connected to the chemical tank 5 with the second pump 6, which can provide deionizing agent to the deionization tank 7; the treated liquid is injected into the filter tank 10 through the second flow meter 19 and the third pump 9; after filtration The liquid is injected into the fracturing flowback liquid treatment tank 12 with the third valve 13 through the fourth pump ...

Embodiment 2

[0028] Embodiment 2: as figure 1As shown, a fracturing flowback fluid recovery, treatment and reuse device, the grit degreasing tank 1 is connected to one end of the first pump 2, the other end of the first pump 2 is connected to the first flowmeter 3, and the first flowmeter 3 The other end is connected to the first valve 4, the other end of the first valve 4 is connected to the deionization tank 7, the deionization tank 7 is connected to the second valve 8 and the second flowmeter 19 at the bottom of the deionization tank, the medicine tank 5 is connected to the second pump 6, The other end of the second pump 6 is connected to the deionization tank 7, the second flow meter 19 is connected to the third pump 9, the other end of the third pump 9 is connected to the filter tank 10, and the other end of the filter tank 10 is connected to the fourth pump 11, the fourth The other end of the pump 11 is connected to the special adjustment tank 12 for fracturing fluid flowback liquid,...

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

No PUM Login to View More

Abstract

The invention provides a recycling and reutilization method and device for flow-back fracturing fluid, belonging to the technical field of cyclic utilization of fracturing fluid. The method comprises the following steps: step a, subjecting the flow-back fracturing fluid to gas-liquid separation via a gas-liquid separation device; step b, allowing the obtained liquid to enter a grit-sedimentation and oil-removal tank for desanding and removal of condensate oil; step c, pumping the condensate-oil-removed liquid in the grit-sedimentation and oil-removal tank into a deionizing tank via a pump to remove metal ions; step d, filtering the treated liquid via a filter tank so as to further remove sediments; and step e, allowing the filtered liquid to enter a special flow-back fracturing fluid storage tank, taking a sample from the tank for total ion analysis and supplementing lost additives to allow the flow-back fracturing fluid to meet construction requirements of the fracturing fluid.

Description

technical field [0001] The invention relates to a method and a device for recovering, treating and reusing fracturing flowback fluid, and belongs to the technical field of fracturing fluid recycling. Background technique [0002] In the process of oil and gas field development, fracturing operation is the most commonly used means of stimulation, especially in low permeability oil and gas fields. After the fracturing operation is complete, most of the fracturing fluid will flow back from the formation. These flowback fluids contain a large amount of residual fracturing fluid additives, formation ions, clay particles and cuttings, some proppants, condensate oil, etc., and flowback into the ecosystem will cause serious pollution to soil and water resources. Harmless direct treatment (making the water quality meet the discharge standard) is costly and technically difficult. At present, various oil and gas fields mainly use the method of centralized storage, pretreatment and re...

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 Patents(China)
IPC IPC(8): C02F9/04
Inventor 张倩熊颖刘友权陈鹏飞张永国吴文刚孙川
Owner PETROCHINA CO LTD