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Method for preparing fracturing fluid by using fracturing flow-back fluid

A fracturing flowback fluid and fracturing fluid technology, applied in chemical instruments and methods, drilling compositions, special treatment targets, etc., can solve problems such as pollution, reduce costs, save clean water resources, and eliminate environmental problems. effect of threat

Pending Publication Date: 2021-10-29
三桶油环保科技(宜兴)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing fracturing fluid by using fracturing flowback fluid to solve the problems of environmental pollution by fracturing flowback fluid and reducing the cost of fracturing construction

Method used

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  • Method for preparing fracturing fluid by using fracturing flow-back fluid
  • Method for preparing fracturing fluid by using fracturing flow-back fluid

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specific Embodiment approach 1

[0013] Specific embodiment one: In this embodiment, a method for preparing fracturing fluid by using fracturing flowback fluid is carried out according to the following steps:

[0014] 1. Inject the fracturing flowback fluid into the sedimentation tank, add flocculant, settle for 4 to 8 hours, pump it into the air flotation machine, the air flotation reflux ratio is 20%, then perform two-stage filtration, and then enter the electrochemical device for electrolysis 80 ~100min, then enter the biological aerated filter for treatment, and then filter with the membrane bioreactor to obtain the treated fracturing flowback fluid;

[0015] 2. Mix 0.2-0.4 parts of base fluid, 0.002-0.004 parts of cross-linking agent, 0.00002-0.00005 parts of gel breaker, and 99.6-99.8 parts of fracturing flowback fluid treated in step 1. After fully stirring, fracturing fluid is obtained ; The base liquid consists of 25 parts of guar gum, 5 parts of drainage aids, 4 parts of demulsifiers, 5 parts of sod...

specific Embodiment approach 2

[0019] Embodiment 2: This embodiment differs from Embodiment 1 in that: in step 1, the flocculant is polyacrylamide, and the dosage of the flocculant is 40-60 mg / L. Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0020] Specific embodiment 3: The difference between this embodiment and specific embodiment 1 or 2 is: the two-stage filtration in step 1 refers to passing through two double-layer filter material filters in sequence, and adding filter aid before performing one-stage filtration. Other steps are the same as those in Embodiment 1 or 2.

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Abstract

The invention relates to a method for preparing a fracturing fluid by using a fracturing flow-back fluid, and aims to solve the problems of environmental pollution caused by the fracturing flow-back fluid and reduction of the fracturing construction cost. The method disclosed by the invention comprises the following steps: performing flocculation sedimentation, air floatation treatment, two-stage filtration, electrochemical treatment, biological aerated filter and deep filtration on the fracturing flow-back fluid once to obtain the treated fracturing flow-back fluid for re-preparing the fracturing fluid. The fracturing fluid is prepared by using the treated fracturing flow-back fluid, so that the treatment problem of the fracturing flow-back fluid is solved, the harm to the environment is reduced, clean water resources are saved, the operation cost of an oil field is reduced, the efficiency of the oil field is improved, and the stable and long-term development of the oil field is realized. The method is applied to the field of fracturing flow-back fluid treatment.

Description

technical field [0001] The invention relates to the technical field of reuse of fracturing flowback fluid, in particular to a method for preparing fracturing fluid by using fracturing flowback fluid. Background technique [0002] Petroleum is an important energy source, which is of great strategic significance to the development of the national economy. Hydraulic fracturing technology is to use natural fractures or man-made fractures in the reservoir, inject fracturing fluid into them, further expand the fractures, and then use proppant to support the fractures to improve the fracture network system of the reservoir, so as to achieve the purpose of increasing production. [0003] With the increase in demand for oil in recent years, major oil fields in my country have also adopted large-scale fracturing to increase production to meet demand. A large amount of fracturing flowback fluid brought about by large-scale fracturing has great harm to the environment and cannot be ign...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/68C02F9/14C02F101/10C02F103/10
CPCC09K8/685C09K8/605C09K8/887C09K8/905C09K8/607C09K8/885C09K8/602C02F9/00C09K2208/26C09K2208/12C02F1/24C02F1/001C02F1/52C02F1/467C02F3/1268C02F2303/04C02F2101/10C02F2103/10
Inventor 魏利魏东张昕昕李春颖
Owner 三桶油环保科技(宜兴)有限公司
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