Gel breaking treatment method of polymer sulfonated mud

A treatment method and mud technology, which is applied in the field of environmental engineering, can solve the problems of large amount of secondary pollution and high treatment cost, and achieve the effect of reducing treatment cost, reducing difficulty, and saving environmental protection treatment cost

Pending Publication Date: 2016-11-16
CHENGDU NUODEYUAN ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the technical problems of high processing cost and large amount of secondary pollution in the prior art, and provide a gel breaking treatment method for polysulfide mud with low processing cost and small amount of solid waste

Method used

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  • Gel breaking treatment method of polymer sulfonated mud

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The polysulfide mud of the present embodiment 1 is: the polysulfide mud produced at the depth of 600 meters in the oil and gas field;

[0027] Prepare pretreatment agent, primary treatment agent, secondary treatment agent and advanced treatment agent respectively;

[0028] A. Pretreatment: After mixing the polysulfide slurry with the pretreatment agent for 1 min, the pretreated polysulfide slurry is obtained;

[0029] The pretreatment agent is an oxidized gel breaker, and 0.05 g of the oxidized gel breaker is added in every 1 kg of polysulfide mud; the oxidized gel breaker is composed of ammonium persulfate and potassium persulfate, and the oxidized gel breaker is based on weight Potassium persulfate: ammonium persulfate = 1:0.1 mixed.

[0030] B, primary treatment: after the pretreated polysulfide slurry obtained in step B is mixed with the primary treatment agent for 3 minutes, after solid-liquid separation, obtain the polysulfide slurry supernatant and primary preci...

Embodiment 2

[0041] The polysulfide mud of the present embodiment 2 is: the polysulfide mud produced at the depth of 2800 meters in the oil and gas field;

[0042] Prepare pretreatment agent, primary treatment agent, secondary treatment agent and advanced treatment agent respectively;

[0043] A. Pretreatment: After mixing the polysulfide slurry with the pretreatment agent for 60 minutes, the pretreated polysulfide slurry is obtained;

[0044] The pretreatment agent is an oxidized gel breaker, and 200 g of the oxidized gel breaker is added to every 1 kg of polysulfide mud; the oxidized gel breaker is composed of ammonium persulfate and potassium persulfate, and the oxidized gel breaker is based on the weight ratio Potassium persulfate: ammonium persulfate = 1:3 mixed.

[0045] B, primary treatment: after the pretreated polysulfide mud obtained in step B is mixed with the primary treatment agent for 60min, after solid-liquid separation, the polysulfide slurry supernatant primary precipitat...

Embodiment 3

[0053] The polysulfide mud of the present embodiment 3 is: the polysulfide mud produced at the depth of 3800 meters in the oil and gas field;

[0054] Prepare pretreatment agent, primary treatment agent, secondary treatment agent and advanced treatment agent respectively;

[0055] A. Pretreatment: After mixing the polysulfide slurry with the pretreatment agent for 40 minutes, the pretreated polysulfide slurry is obtained;

[0056] The pretreatment agent is an oxidized gel breaker, and 100 g of the oxidized gel breaker is added to every 1 kg of polysulfide mud; the oxidized gel breaker is composed of ammonium persulfate and potassium persulfate, and the oxidized gel breaker is based on the weight ratio Potassium persulfate: ammonium persulfate = 1:1.6 mixed.

[0057] B, primary treatment: after the pretreated polysulfide slurry obtained in step B is mixed with the primary treatment agent for 40min, after solid-liquid separation, obtain the polysulfide slurry supernatant and pr...

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Abstract

The invention belongs to the field of environmental engineering, particularly relates to a deep gel breaking treatment method of waste polymer sulfonated mud in an oil-gas field and aims to solve the technical problems that gel breaking in the prior art is not thorough, the treatment cost is high, the solid waste is increased after treatment, water resources are wasted and the like. The gel breaking treatment method of the polymer sulfonated mud comprises steps as follows: A, pretreatment; B, primary treatment; C, secondary treatment; D, deep treatment; E, separation treatment. According to the technical scheme, the rear-end treatment difficulty is reduced through multiple solid-liquid separation operation, and the environmental protection treatment cost of a well field is effectively saved; the increment of the volume of the solid phases of the polymer sulfonated mud treated with the technical scheme doesn't exceed 8%; a liquid supernatant of the polymer sulfonated mud treated with the technical scheme can be directly recycled to be used for well field fracturing or other applications, and the cost of water consumption of the well field is saved.

Description

technical field [0001] The invention belongs to the field of environmental engineering, and in particular relates to a deep gel-breaking treatment method for waste polysulfide mud in oil and gas fields. Background technique [0002] Polymer sulfonated mud refers to polymer sulfonated mud, which is one of the main sources of pollution in the oil and gas industry. It is a multiple stable colloid suspension system containing clay, weighted materials, various chemical treatment agents, sewage, dirty oil and drilling cuttings. Its main components are hydrocarbons, salts, various polymers, lignin sulfonate salts, some metal ions (such as mercury, copper, arsenic, chromium, zinc and lead) and impurities in barite, etc. The high content of COD, salinity, chroma, suspended solids and other substances in polysulfide mud have a great impact on the environment. If it is not handled properly, it will cause serious pollution to the environment. Due to the complex composition and high st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/14
CPCC02F11/14
Inventor 尹华平巫贤志何巧云
Owner CHENGDU NUODEYUAN ENVIRONMENTAL PROTECTION TECH CO LTD
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