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Environment friendly curing agent for waste well completing fracturing fluid

An environmentally friendly curing agent and fracturing fluid technology, which is applied in other chemical processes, chemical instruments and methods, etc., can solve problems such as difficult centralized treatment, dispersed oil well operations, intermittent discharge, etc., to reduce treatment costs, save land resources, restore The effect of ecological environment

Active Publication Date: 2007-03-21
DAQING OILFIELD CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the "five-step method" requires a large investment, and the operation of each oil well is scattered and discharged intermittently, so it is not easy to centralize the treatment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] Example 1. After mixing 1 part of polyaluminum, 5 parts of high-calcium ash, 10 parts of quicklime, 5 parts of aluminum silicate, 0.3 part of phosphogypsum and 0.5 part of sodium sulfate, add it to waste fracturing fluid, and mix it with waste completion Mix and stir the fracturing fluid. After curing, soak the solidified product with water, and test the water quality as shown in Table 1.

[0009] Test content

Embodiment 2

[0010] Example 2, after mixing 26 parts of polyaluminum, 20 parts of high-calcium ash, 30 parts of quicklime, 70 parts of aluminum silicate, 30 parts of phosphogypsum and 8 parts of Yuanming powder, add it to the waste fracturing fluid, and mix it with the waste well completion The fracturing fluid was mixed and stirred well. After curing, the solidified product was soaked in water, and the water quality was tested as shown in Table 2.

[0011] Test content

Embodiment 3

[0012] Example 3, after mixing 15 parts of polyaluminum, 12 parts of high-calcium ash, 20 parts of quicklime, 35 parts of aluminum silicate, 60 parts of phosphogypsum and 15 parts of Yuanming powder, add it to the waste fracturing fluid, and mix it with the waste well completion Mix and stir the fracturing fluid. After curing, soak the solidified product with water, and test the water quality as shown in Table 3.

[0013] Test content

[0014] The above testing methods are carried out according to GB / T 6920-1986, GB / T 11903-1989, GB / T16488-1996, GB / T 7490-1987, GB / T 16489-1996 and GB / T 7479-1987 "Water Quality Testing" standard Laboratory determination.

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PUM

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Abstract

The present invention relates to one kind of environment friendly curing agent for waste well completing fracturing fluid, and aims at treating great amount of waste well completing fracturing fluid produced in oil and gas field production. The environment friendly curing agent consists of polyaluminate 1-26 weight portions, high calcium ash 5-20 weight portions, lime 10-30 weight portions, aluminum silicate 5-70 weight portions, ardeaite 0.3-60 weight portions, and anhydrous sodium sulfate 0.5-15 weight portions. The environment friendly curing agent is used in curing waste well completing fracturing fluid, and has convenient construction and no secondary pollution.

Description

Technical field: [0001] The invention relates to a curing agent used in the development and production process of oil and gas fields, in particular to an environment-friendly curing agent for well completion waste fracturing fluid. Background technique: [0002] A large amount of well completion waste fracturing fluid is produced during the development and production of oil and gas fields. According to preliminary estimates, each well produces more than 30 cubic meters of waste fluid during conventional fracturing, and the composition of the fracturing waste fluid discharged from the wellhead is relatively low It is complex and contains harmful substances such as crude oil and formation water. If it is directly discharged into the environment, it will pollute the water body and soil, and do certain harm to humans, animals and plants. Due to the wide variety of additives, it is difficult to treat these waste liquids; in the past, the "five-step method" was used together, that...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/32A62D3/00
Inventor 王寿光张瑞泉乔丽艳林森乔淑莹刘艳儒王欣福李金成
Owner DAQING OILFIELD CO LTD
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