A fracturing flowback fluid treatment and reuse process

A fracturing flowback fluid and process technology, applied in natural water body treatment, multi-stage water treatment, water/sewage multi-stage treatment, etc. The problems of large land occupation, environmental pollution and high cost have achieved the effect of shortening the construction period, shortening the construction time, and simple on-site operation.

Active Publication Date: 2016-08-17
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the technical problems that the fracturing flowback fluid cannot be recycled and reused online, pollute the environment and have high cost, the previous fracturing flowback fluid treatment process takes a long time, and the processing equipment and storage tank occupy a large area. The present invention provides a Treatment and reuse process of fracturing flowback fluid

Method used

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  • A fracturing flowback fluid treatment and reuse process

Examples

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Embodiment 1

[0024] In order to overcome the technical problems that the fracturing flowback fluid cannot be recycled and reused online, pollute the environment and have high cost, the previous fracturing flowback fluid treatment process takes a long time, and the processing equipment and storage tank occupy a large area. The present invention provides a A fracturing flowback fluid treatment and reuse process, the invention can realize the online processing and recycling of fracturing flowback fluid, and the processing capacity is not less than 60m 3 / h, which can meet the requirements of oil and gas well discharge. The flowback liquid recovery system has the advantages of simple on-site operation, the recovery efficiency of the flowback liquid is higher than 98%, and it can be recycled. The flowback fluid recovery and treatment system can reduce the discharge of fracturing fluid waste, save fracturing water, shorten the construction period, and shorten the construction time by about 1 day...

Embodiment 2

[0039] On the basis of embodiment 1,

[0040] 1) After the fracturing construction of the natural gas well is completed, the fracturing flowback fluid injected from the wellhead 1 passes through the high-pressure cyclone degassing device 2, and the gas in the fracturing flowback fluid is separated to the gas pipeline 9, and the liquid and solid The proppant mixture is separated;

[0041] 2) In step 1), the liquid and solid proppant mixture treated by the high-pressure cyclone degassing device 2 is depressurized through the throttling and pressure-reducing manifold 3, and the fracturing is controlled at 2MPa;

[0042] 3) Pass the mixed liquid separated in step 2) through the low-pressure three-phase separation device 4 to separate the gas, liquid and solid proppant in the mixed liquid, and the gas is separated to the input pipeline 9, and the solid proppant passes through the proppant collection container 10 collection;

[0043] 4) Send the liquid separated in step 3) into th...

Embodiment 3

[0051] In this example, the water quality regulator of Hubei Haili Environmental Protection Technology Co., Ltd. is used. The water quality regulator mainly removes the influence of some ions in the water on the properties of the fracturing fluid. The water quality regulator can be a pH regulator, which increases the specific gravity after adjusting the pH value, so that the final pH value is less than or equal to 5, which meets the requirements for reconfiguring the fracturing fluid.

[0052] The fracturing flowback fluid sprayed out has also been pre-stored in the flowback fluid temporary storage tank 8 to achieve the ability to slow down the flow rate of the blowout, and can also directly enter the low-pressure three-phase separation device 4 to separate gas, liquid, and solid proppant.

[0053] The processing flow rate of the present invention: gas well flowback fluid processing capacity 4m 3 / min, gas 20×10 4 m 3 / d; liquid recovery rate 99%, gas-liquid separation rate...

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Abstract

The invention provides a process for processing and recycling a fracturing flow-back fluid. The flow-back fluid which is blown off from a wellhead sequentially passes through a high-pressure hydrocyclone desanding device, a flow regulation pressure reducing manifold, a low-pressure three-phase separation device, a fine filtering device and a fracturing flow-back fluid storage tank; the fracturing fluid is prepared again by detecting and adding a water conditioning agent and is stored in a fracturing fluid storage tank; gas separated out after passing through the high-pressure hydrocyclone desanding device is collected by a gas transmission line; and a solid propping agent which is separated out through the low-pressure three-phase separation device is collected by a propping agent collection container. According to the process, the fracturing water is saved; the construction cycle is shortened; the single-layer construction time is shortened by about 1 day; the process can be applied to next-layer fracturing of the wellhead; the process is small in floor area; a storage reaction tank and the like are not needed; water resources are repeatedly utilized; and environmental pollution is reduced.

Description

technical field [0001] The invention relates to a process for treating and reusing fracturing flowback fluid, which belongs to the field of water treatment for oil and gas field development. Background technique [0002] At present, domestic and foreign cluster well reconstructions have entered the stage of large-scale development in oil and gas wells, from the initial "two sisters" cluster wells to the "fourteen sisters" cluster wells, from cluster vertical wells (inclined wells) to cluster water wells. The number of flat wells and cluster wells is increasing year by year, and the scale of reconstruction is also increasing year by year. In addition, as a large number of low-permeability and ultra-low-permeability reservoirs have entered the stage of large-scale development, horizontal well fracturing and volume fracturing have gradually become the main technologies for oil and gas field development. increase. According to statistics, the volume of fracturing flowback flui...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04
CPCC02F1/24C02F9/00C02F2103/34C02F2301/08
Inventor 徐迎新杨博丽袁伟文张冕李启新席仲琛谢涛韩静静任荣利
Owner BC P INC CHINA NAT PETROLEUM CORP
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