CN106242119B - Discarded sulphonated polymer mud gel breaker and its gel breaking method - Google Patents

Discarded sulphonated polymer mud gel breaker and its gel breaking method Download PDF

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Publication number
CN106242119B
CN106242119B CN201610796158.3A CN201610796158A CN106242119B CN 106242119 B CN106242119 B CN 106242119B CN 201610796158 A CN201610796158 A CN 201610796158A CN 106242119 B CN106242119 B CN 106242119B
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China
Prior art keywords
discarded
sulphonated polymer
polymer mud
gel
breaking method
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CN201610796158.3A
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Chinese (zh)
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CN106242119A (en
Inventor
苏俊霖
王亮
卢俊锋
陈海涛
王燕
董汶鑫
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Southwest Petroleum University
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Southwest Petroleum University
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00—General aspects of water treatment
    • C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions

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  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Sludge (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)

Abstract

The present invention relates to a kind of sewage water treatment methods, and specially discarded sulphonated polymer mud gel breaker and its gel breaking method are firstly added quick lime stirring, are pre-processed, the concentrated sulfuric acid adjusts its PH to 4~5；Sulfamic acid is added, after breaking glue flocculation, then carries out mechanical dehydration, the effluent reuse after centrifugation.Discarded sulphonated polymer mud gel breaker and its gel breaking method provided by the invention; the combination of quick lime, the concentrated sulfuric acid, sulfamic acid had both been able to satisfy the requirement that discarded sulphonated polymer mud breaks glue; it can achieve the purpose that drilling fluid is prepared in the also special reuse isolated again; play protection environment; energy-saving and emission-reduction, the effect recycled.

Description

Discarded sulphonated polymer mud gel breaker and its gel breaking method
Technical field
The present invention relates to a kind of sewage water treatment methods, specially discarded sulphonated polymer mud gel breaker and its gel breaking method.
Background technique
Rejected well drilling liquid has become a kind of very important polluted-water of petrochemical industry, it is that a kind of discharge amount is big, Wide and harm waste water very serious.The ingredient for the rejected well drilling liquid that we are studied is sufficiently complex, has stability good, solid The features such as body suspension content is high, biodegradability is poor, in numerous waste drilling fluids disposal technology and methods, various processing sides Method has its limitation, is unable to reach processing requirement.Solid-liquid isolation method is because reacting fast, and the sedimentation time is short, high treating effect, operation It is convenient and efficient, it is low in cost the advantages that used by most of researchers both domestic and external, producer.
The principle of solid-liquid separation technique is: gel breaker and flocculant appropriate being added in rejected well drilling liquid, is bored with changing The physics of well mud system, chemical property thoroughly destroy drilling mud colloidal dispersion, change clay particle surface in drilling mud Property allows thinner particle to generate coalescence, it is made to realize separation of solid and liquid under mechanical-assisted separation condition.
Rejected well drilling liquid generally has good colloidal stability, therefore, grasps the stable mechanism of drilling well liquogel and breaks Bad mechanism selects suitable gel breaker, becomes the key point of solid-liquid separation technique.
Currently, processing rejected well drilling liquid has inorganic and organic two major classes using more gel breaker.Inorganic is divided into nothing again Machine acid, high-valency metal salt and strong oxidizer.Inorganic acid is mainly sulfuric acid, hydrochloric acid, phosphoric acid etc.；High-valency metal salt specifically includes that Al2(SO4)3、AlK(SO4)2、Fe(ClSO4)、FeCl3、Fe2(SO4)3Deng；Strong oxidizer includes potassium peroxydisulfate, ammonium persulfate, mistake Sodium sulphate etc..The mainly number acid, such as formic acid, oxalic acid, citric acid, sulfonic acid of organic.
According to the stable mechanism of mud, for clay mineral because lattice replaces, surface is negatively charged；High molecular material (PAM, CMC etc.) group that ionizes under alkaline condition is negatively charged, and because the repulsion of intramolecular charge acts on, molecular conformation is unfolded, while by In the negative electrical charge of its band, when being adsorbed on clay particle surface, the zeta current potential (negative electrical charge) of clay particle can also be improved, Advantageously form stable mud system.Therefore, live multiselect uses cationic electrolyte as gel breaker at present.Such as: FeCl3、Fe2(SO4)3, potassium peroxydisulfate, ammonium persulfate, sodium peroxydisulfate etc., and these gel breakers have broken glue effect well really Fruit.
Energy-saving and emission-reduction are advocated energetically in current country, under the national conditions for protecting environment, it is therefore desirable to be able to after separation of solid and liquid Liquid circulation using prepare drilling fluid, especially for now use more Sulphonated polymer mud system.Use inorganic cation Type gel breaker is clearly not reach requirement in terms of liquid reuse although can obtain good effect in terms of broken glue. Because of addition (such as Al of inorganic cation3+、Fe3+Deng), it if be not pocessed, can be utilized in later cycles, prepare drilling fluid When, seriously affect the performance of drilling fluid.
Summary of the invention
In view of the problems of the existing technology, the present invention provides a kind of discarded sulphonated polymer mud gel breaking method, makes it can Good broken glue effect is obtained, and can not influence liquid recycles preparation drilling fluid.
Discarded sulphonated polymer mud gel breaker, including quick lime, the concentrated sulfuric acid and sulfamic acid.
Discarded sulphonated polymer mud gel breaking method, comprising the following steps:
(1) it discards in sulphonated polymer mud, is firstly added quick lime stirring, is pre-processed, the Lime Quality being added It is 2.5g/L with discarded sulphonated polymer mud volume ratio；
(2) after stirring 30min, the concentrated sulfuric acid adjusts its PH to 4~5；
(3) it is eventually adding sulfamic acid, stirs 30min, sulfamic acid quality is with discarded sulphonated polymer mud volume ratio 10g/L；
(4) after breaking glue flocculation, then mechanical dehydration, the effluent reuse after centrifugation are carried out.
Because the point of discarded sulphonated polymer mud is more negative, colloidal dispersion is more stable, is less susceptible to generate separation of solid and liquid, Discarded sulphonated polymer mud gel breaking method provided by the invention, the Zeta potential of discarded sulphonated polymer mud can be become connecing from -148mv It is bordering on 0 current potential.Water rate after centrifugation reaches 78% or so.Liquid after separation can be used further to prepare drilling fluid.
Sulfamic acid (H2NSO3It H) is a kind of solid strong acid, white crystal is nontoxic, and odorless, stability is good, does not wave at room temperature The degree of ionization of hair, non-hygroscopic, relative density 2.126, aqueous solution is high, has the highly acid as sulfuric acid, hydrochloric acid.Amino Sulfonic acid is a kind of widely used fine chemical product, is increasingly subject to attention both domestic and external due to function admirable.Especially in petroleum Engineering drilling fluid recycles aspect, will not bring new pollutant into.Ca in quick lime2+Introducing with the concentrated sulfuric acid will not be to returning It is had much impact with preparation drilling fluid.
Discarded sulphonated polymer mud gel breaker and its gel breaking method provided by the invention, quick lime, the concentrated sulfuric acid, sulfamic acid Combination had not only been able to satisfy discarded sulphonated polymer mud and has broken the requirement of glue, but also can reach the mesh that drilling fluid is prepared in the also special reuse isolated , play protection environment, energy-saving and emission-reduction, the effect recycled.
Specific embodiment
It is described in conjunction with the embodiments a specific embodiment of the invention.
For discarded sulphonated polymer mud, the ratio between the quality of the quick lime of addition and the volume of discarded sulphonated polymer mud are 2.5g/L is added quick lime and is pre-processed, and after stirring 30min, the concentrated sulfuric acid is added and adjusts its PH about to 4.5, the dense sulphur of addition The ratio between sour volume and the volume of discarded sulphonated polymer mud 1.43:100, the sulfamic acid being eventually adding, sulfamic acid solid masses It is 10g/L with discarded sulphonated polymer mud volume ratio, stirs 30min.

Claims (1)

1. the gel breaking method of discarded sulphonated polymer mud gel breaker, it is characterised in that: the following steps are included:
(1) it discards in sulphonated polymer mud, is firstly added quick lime stirring, is pre-processed, the Lime Quality being added and useless Abandoning sulphonated polymer mud volume ratio is 2.5g/L；
(2) after stirring 30min, the concentrated sulfuric acid adjusts its PH to 4~5；
(3) it is eventually adding sulfamic acid, stirs 30min, sulfamic acid quality and discarded sulphonated polymer mud volume ratio are 10g/L；
(4) after breaking glue flocculation, then mechanical dehydration, the effluent reuse after centrifugation are carried out.
CN201610796158.3A 2016-08-31 2016-08-31 Discarded sulphonated polymer mud gel breaker and its gel breaking method Active CN106242119B (en)

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Application Number Priority Date Filing Date Title
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CN106242119B true CN106242119B (en) 2019-03-19

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107327282A (en) * 2017-08-21 2017-11-07 沧州市华油飞达固控设备有限公司 The processing method and its device of a kind of rejected well drilling liquid
CN112322274B (en) * 2020-11-27 2022-12-20 西安石油大学 Preparation method of repeatable water-based fracturing fluid, gel breaker and application of gel breaker

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101190822A (en) * 2006-11-24 2008-06-04 中国科学院生态环境研究中心 Technique for treating sewage of high well and deep drilling well
CN101269888A (en) * 2008-05-09 2008-09-24 四川大学 Solid-liquid separation technique for waste slurry of water-based system artesian well
CN106145440A (en) * 2016-07-18 2016-11-23 中石化石油工程技术服务有限公司 Oil gas field waste water-base drilling liquid solid-liquid separating method

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6702044B2 (en) * 2002-06-13 2004-03-09 Halliburton Energy Services, Inc. Methods of consolidating formations or forming chemical casing or both while drilling

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101190822A (en) * 2006-11-24 2008-06-04 中国科学院生态环境研究中心 Technique for treating sewage of high well and deep drilling well
CN101269888A (en) * 2008-05-09 2008-09-24 四川大学 Solid-liquid separation technique for waste slurry of water-based system artesian well
CN106145440A (en) * 2016-07-18 2016-11-23 中石化石油工程技术服务有限公司 Oil gas field waste water-base drilling liquid solid-liquid separating method

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