CN109133559B - Agent and method for reducing chemical oxygen demand of waste sulfonated mud for drilling - Google Patents
Agent and method for reducing chemical oxygen demand of waste sulfonated mud for drilling Download PDFInfo
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- CN109133559B CN109133559B CN201811196175.9A CN201811196175A CN109133559B CN 109133559 B CN109133559 B CN 109133559B CN 201811196175 A CN201811196175 A CN 201811196175A CN 109133559 B CN109133559 B CN 109133559B
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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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/06—Treatment of sludge; Devices therefor by oxidation
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/10—Nature of the water, waste water, sewage or sludge to be treated from quarries or from mining activities
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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 Water By Oxidation Or Reduction (AREA)
- Treatment Of Sludge (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention provides a medicament for reducing the chemical oxygen demand of waste sulfonated mud for drilling, which is prepared by compounding one or two of peroxide and hypochlorite with a flocculating agent, wherein the mass ratio of the compounding is as follows: if the peroxide and the flocculating agent are compounded, the peroxide accounts for 5-10 percent, and the flocculating agent accounts for 90-95 percent; if hypochlorite and the flocculating agent are compounded, the hypochlorite accounts for 9-15 percent, and the flocculating agent accounts for 85-91 percent; if the peroxide, the hypochlorite and the flocculating agent are compounded, the peroxide accounts for 4-13%, the hypochlorite accounts for 6-16% and the flocculating agent accounts for 71-90%. The invention also provides a method for reducing the chemical oxygen demand of the waste sulfonated mud of the drilling well by using the medicament.
Description
Technical Field
The invention belongs to the field of petroleum and natural gas, and particularly relates to a medicament for reducing the Chemical Oxygen Demand (COD) of waste sulfonated mud for drilling and a method for reducing the chemical oxygen demand of the waste sulfonated mud for drilling by using the medicament.
Background
A large amount of drilling waste mud is generated in the processes of oil and gas exploitation, drilling and well workover; due to the use of large amounts of chemicals during the production process, the drilling waste mud is complex in composition, exhibiting mainly high chemical oxygen demand, high pH, oil complexity and variability, and dispersancy and mobility due to the drilling operation.
In terms of chemical oxygen demand, organic matters in the waste sulfonated mud generated in drilling mainly come from chemical agents and lubricants used in the drilling process, and the content of the organic matters is as high as tens of thousands of milligrams even hundreds of thousands of milligrams per liter, which is far greater than that of the organic matters in the surrounding environment; this phenomenon leads to an increase in the chemical oxygen demand content in the surrounding environment, thus deteriorating the ecological environment; therefore, the chemical oxygen demand is used as an important index for measuring the treatment of the waste sulfonated mud of the drilling well in the environmental protection of the oil field.
The chemical oxygen demand in the waste sulfonated mud of the well drilling is used for measuring the existence amount of reducing substances in the waste sulfonated mud, wherein the organic dirt is mainly used; the higher the chemical oxygen demand, the higher the organic content in the waste sulfonated mud.
In recent years, due to the increase of drilling depth, the drilling process has higher and higher advices on the use of the sulfonated mud, and the amount of the sulfonated mud is larger and larger, so that the higher the concentration of pollutants in the waste mud is, the more serious the pollution to the soil and the surface (lower) water of the surrounding environment is.
At present, the degradation of the chemical oxygen demand in the drilling waste sulfonated mud is mainly flocculation sedimentation, organic matters in the drilling waste mud are separated into a liquid phase to be separated from a solid phase, the chemical oxygen demand content in the solid phase is reduced, but the chemical oxygen demand in the liquid phase is increased, and meanwhile, the degradation degree of the chemical oxygen demand in the drilling waste sulfonated mud is not thorough, and secondary pollution is caused to the liquid phase.
Disclosure of Invention
Aiming at the problems, the invention provides a medicament for reducing the chemical oxygen demand of the waste sulfonated mud for drilling and a method for reducing the chemical oxygen demand of the waste sulfonated mud for drilling by using the medicament, and organic substances in the waste sulfonated mud for drilling are degraded, so that the purpose of reducing the chemical oxygen demand is achieved.
In order to solve the technical problems, the invention adopts the technical scheme that:
the chemical oxygen demand reducing agent for waste sulfonated mud of well drilling is prepared by compounding one or two of peroxide and hypochlorite with a flocculating agent, and the mass ratio of the compound is as follows:
if the peroxide and the flocculating agent are compounded, the peroxide accounts for 5-10 percent, and the flocculating agent accounts for 90-95 percent;
if hypochlorite and the flocculating agent are compounded, the hypochlorite accounts for 9-15 percent, and the flocculating agent accounts for 85-91 percent;
if the peroxide, the hypochlorite and the flocculating agent are compounded, the peroxide accounts for 4-13%, the hypochlorite accounts for 6-16% and the flocculating agent accounts for 71-90%.
Further, the peroxide includes hydrogen peroxide, sodium peroxide, and the like.
Further, hypochlorite includes sodium hypochlorite, calcium hypochlorite, and the like.
Further, the flocculating agent comprises an inorganic flocculating agent, an organic flocculating agent and a biological flocculating agent.
Further, a pH regulator is also included, and the pH regulator comprises citric acid, sorbic acid and the like.
A method for reducing the chemical oxygen demand of well drilling waste sulfonated mud comprises the following steps:
the agent is dissolved and then added into the waste sulfonated mud to be treated, and the chemical oxygen demand in the waste sulfonated mud is reduced through full mixing reaction.
Further, before the agent is added, the pH value of the waste sulfonated mud for drilling is adjusted to 6-9.
Further, the waste sulfonated mud from drilling is collected by a receiving device, and the method is adopted in the receiving device to carry out treatment for reducing the chemical oxygen demand of the waste sulfonated mud from drilling, and the receiving device can be a tank body.
Furthermore, a stirring device is arranged on the tank body and used for stirring the waste sulfonated mud generated in the drilling process so as to prevent sedimentation.
The invention has the following beneficial effects:
according to the invention, by adjusting the pH value of the waste sulfonated mud from drilling, the usage amount of chemical agents can be reduced in the treatment process, and the treatment effect is improved. The agent is added into waste sulfonated mud for oxidation reaction, and the reaction mechanism is as follows: when the drilling sulfonated mud is oxidized by compounding the peroxide and the flocculant, hydroxyl radicals are generated in the reaction process, and organic matters in the sulfonated mud are degraded in a non-selective manner by means of electron transfer or electrophilic addition, so that the organic matters are converted into carbon dioxide and water; hypochlorite and flocculating agent are compounded to act on the well drilling sulfonated mud for oxidation, hypochlorite free radicals can be generated in the reaction process, the hypochlorite free radicals can be further split to generate hydroxyl free radicals, and excited oxygen atoms can be obtained at the same time, so that organic matters in the sulfonated mud are degraded and converted into carbon dioxide and water; when the peroxide, hypochlorite and the flocculating agent are compounded and act with the well drilling sulfonated mud, hydroxyl free radicals and excited oxygen atoms are generated in the reaction process, so that organic matters in the sulfonated mud are degraded and converted into carbon dioxide and water. The agent and the sulfonated mud react violently in the action process, a large amount of carbon dioxide is generated, so that the sulfonated mud for drilling is full of bubbles, the sulfonated mud contained in the tank body is possibly overflowed, and the secondary pollution of the soil is caused.
The invention can degrade the organic matter of the waste sulfonated mud of the drilling well through the medicament, the chemical oxygen demand content of the degraded pollutant meets the regulation, the pollutant can be recycled, and the secondary pollution to the environment can not be caused. The method has the advantages of simple treatment process, easy operation, short treatment period, low investment cost and good environmental, social and economic benefits.
Detailed Description
In order to make the aforementioned and other features and advantages of the invention more comprehensible, embodiments accompanied with figures are described in detail below.
In this embodiment, the chemical oxygen demand of the waste sulfonated mud from drilling is reduced by using the chemical oxygen demand reducing agent and the chemical oxygen demand reducing method provided by the present invention, which are specifically as follows:
the method comprises the steps of collecting and containing the waste sulfonated mud for drilling, carrying out pH adjustment on the waste sulfonated mud for drilling through a pretreatment mode, dissolving the medicament through a medicament adding mode, directly adding the dissolved medicament into the waste sulfonated mud for drilling, and fully mixing and reacting the medicament and the waste sulfonated mud for drilling so as to achieve the purpose of reducing the chemical oxygen demand.
The receiving device is used for avoiding the pollutants from being omitted or polluting the surrounding environment in a scattered process, causing the increase of unnecessary cost and workload, collecting the pollutants and realizing the pollutants by methods such as tank body containing and the like. The tank body is filled with the sulfonated mud, a stirring device can be properly added into the tank body, the waste sulfonated mud in drilling is prevented from being precipitated, and the treatment difficulty is reduced.
The pretreatment mode pH adjustment is used for reducing the usage amount of chemical agents in the treatment process and increasing the treatment effect, and the pH of the waste sulfonated mud of the drilling well can be adjusted before the chemical oxygen demand is degraded, so that the pH value is between 6 and 9.
The agent is prepared by compounding one or two of peroxide (hydrogen peroxide, sodium peroxide and the like), hypochlorite (sodium hypochlorite, calcium hypochlorite and the like) and flocculant (inorganic flocculant, organic flocculant and biological flocculant) into the waste sulfonated mud for reducing the chemical oxygen demand in the waste sulfonated mud. The compounding proportion (mass ratio) of the medicament is as follows:
1. the peroxide and the flocculating agent are compounded into a medicament A, wherein the peroxide accounts for 5-10%, and the flocculating agent accounts for 90-95%.
2. Hypochlorite and flocculating agent are compounded into a medicament B, wherein the hypochlorite accounts for 9-15%, and the flocculating agent accounts for 85-91%.
3. The peroxide, the hypochlorite and the flocculating agent are compounded into a medicament C, wherein the peroxide accounts for 4-13%, the hypochlorite accounts for 6-16%, and the flocculating agent accounts for 71-90%.
Compared with the direct addition of the insoluble agent, the agent after being dissolved can be more fully mixed and reacted with the waste sulfonated mud for drilling which needs to be treated, and the waste of the agent can be avoided.
The chemical oxygen demand in the waste sulfonated mud for drilling is reduced by the agent and the method, the waste sulfonated mud for drilling is collected and pH value is adjusted at first, and then the agent is added for oxidation treatment, so that the chemical oxygen demand in the waste sulfonated mud for drilling is completely reduced, and resource utilization is realized.
Comparison of experiments
The standard sampling of a plurality of groups of waste sulfonated mud is carried out on a plurality of drilled wells in northwest oil fields on site, the COD (chemical oxygen demand) reduction treatment is carried out by utilizing the traditional medicament and the medicament provided by the invention, the sample amount of each group of waste sulfonated mud is 1000g, the added medicament amount is 0.15%, the pH value is adjusted for full reaction, the COD value after the reaction is detected, and the relevant data are shown in the following tables 1-2. The specific ratios of the components of the pharmaceutical A, B, C selected in table 2 are not limited, and in practice, the ratio can be selected from the two values and the reasonable ratio between the two values according to the ratio range given above.
TABLE 1 traditional agent treatment
Table 2 pharmaceutical treatment of the invention
As shown in the above Table 1-2, the COD values after the treatment with the conventional agent are 278.8-322.2, the average value is about 301.5, while the COD values after the treatment with the agent of the present invention are 53.9-110.2, the average value is about 86.8, which is significantly lower than the former. Therefore, compared with the traditional medicament, the medicament has better effect on reducing the chemical oxygen demand of the waste sulfonated mud of the drilling well and can realize resource utilization.
The above embodiments are only intended to illustrate the technical solution of the present invention and not to limit the same, and a person skilled in the art can modify the technical solution of the present invention or substitute the same without departing from the spirit and scope of the present invention, and the scope of the present invention should be determined by the claims.
Claims (9)
1. The chemical oxygen demand reducing agent for the waste sulfonated mud for drilling is characterized by comprising one or two of peroxide and hypochlorite, a flocculating agent and a pH adjusting agent, wherein the pH adjusting agent comprises citric acid and sorbic acid, and the flocculating agent is compounded with one or two of the peroxide and the hypochlorite in the following mass ratio:
if the peroxide and the flocculating agent are compounded, the peroxide accounts for 5-10 percent, and the flocculating agent accounts for 90-95 percent;
if hypochlorite and the flocculating agent are compounded, the hypochlorite accounts for 9-15 percent, and the flocculating agent accounts for 85-91 percent;
if the peroxide, the hypochlorite and the flocculating agent are compounded, the peroxide accounts for 4-13%, the hypochlorite accounts for 6-16% and the flocculating agent accounts for 71-90%.
2. The agent for reducing the chemical oxygen demand of drilling waste sulfonated mud of claim 1, wherein the peroxide comprises hydrogen peroxide and sodium peroxide.
3. The agent for reducing chemical oxygen demand of drilling waste sulfonated mud of claim 1, wherein the hypochlorite comprises sodium hypochlorite, calcium hypochlorite.
4. The agent for reducing the chemical oxygen demand of drilling waste sulfonated mud of claim 1, wherein the flocculant comprises an inorganic flocculant, an organic flocculant, a biological flocculant.
5. A method for reducing the chemical oxygen demand of well drilling waste sulfonated mud is characterized by comprising the following steps:
the agent of any one of claims 1 to 4 is dissolved and then added into the waste sulfonated mud for drilling to be treated, and the chemical oxygen demand in the waste sulfonated mud for drilling is reduced through full mixing reaction.
6. The method for reducing the chemical oxygen demand of the drilling waste sulfonated mud according to claim 5, wherein the pH value of the drilling waste sulfonated mud is adjusted to 6-9 before adding the medicament.
7. The method of reducing the chemical oxygen demand of drilling waste sulfonated mud of claim 5, wherein the drilling waste sulfonated mud is collected by a receiving device and the method is used in the receiving device to reduce the chemical oxygen demand of the drilling waste sulfonated mud.
8. The method for reducing the chemical oxygen demand of drilling waste sulfonated mud of claim 5, wherein the receiving means is a tank.
9. The method for reducing the chemical oxygen demand of drilling waste sulfonated mud of claim 8, wherein the tank is provided with a stirring device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811196175.9A CN109133559B (en) | 2018-10-15 | 2018-10-15 | Agent and method for reducing chemical oxygen demand of waste sulfonated mud for drilling |
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|---|---|---|---|
| CN201811196175.9A CN109133559B (en) | 2018-10-15 | 2018-10-15 | Agent and method for reducing chemical oxygen demand of waste sulfonated mud for drilling |
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| Publication Number | Publication Date |
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| CN109133559A CN109133559A (en) | 2019-01-04 |
| CN109133559B true CN109133559B (en) | 2021-06-29 |
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| CN201811196175.9A Active CN109133559B (en) | 2018-10-15 | 2018-10-15 | Agent and method for reducing chemical oxygen demand of waste sulfonated mud for drilling |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111003910A (en) * | 2019-12-31 | 2020-04-14 | 西安华盛坤泰能源环保科技有限公司 | Method for treating waste sulfonated mud from drilling |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102515320A (en) * | 2011-11-09 | 2012-06-27 | 中蓝连海设计研究院 | Oxidation-coagulation agent |
| CN105236549A (en) * | 2015-10-23 | 2016-01-13 | 中国石油集团川庆钻探工程有限公司长庆钻井总公司 | Coagulant used for performing solid-liquid separation on waste drilling fluid in clean production and preparation method thereof |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102515320A (en) * | 2011-11-09 | 2012-06-27 | 中蓝连海设计研究院 | Oxidation-coagulation agent |
| CN105236549A (en) * | 2015-10-23 | 2016-01-13 | 中国石油集团川庆钻探工程有限公司长庆钻井总公司 | Coagulant used for performing solid-liquid separation on waste drilling fluid in clean production and preparation method thereof |
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| CN109133559A (en) | 2019-01-04 |
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