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A biological treatment method for waste drilling mud

A waste mud and biological treatment technology, which is applied in the direction of biological sludge treatment, sludge treatment, sludge treatment, etc., can solve the problems of long curing time, low strength, and inability to realize safe landfill on site, so as to reduce the curing time , Improve the curing strength, and increase the effect of safe landfill volume

Active Publication Date: 2017-09-22
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a kind of biological treatment method of drilling waste mud in view of the deficiencies in the prior art. The removal of petroleum hydrocarbons, polyacrylamide and carboxymethyl cellulose, as well as solid-liquid separation and solidification treatment, effectively remove the organic matter content in the waste liquid slurry, and reduce the long curing time, poor effect and low strength caused by the existence of a large amount of organic matter And the problem of inability to realize safe landfill in situ

Method used

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  • A biological treatment method for waste drilling mud

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Experimental program
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Effect test

Embodiment 1

[0033] Utilize the method of the present invention to process the drilling waste mud of a certain block P oil well in Shengli Oilfield, and the amount of waste mud produced by drilling in this block is 6000m 3 ,Specific steps are as follows:

[0034] (1) Determination of petroleum hydrocarbons, polyacrylamide and carboxymethyl cellulose

[0035] Determination of the content of petroleum hydrocarbons in drilling waste mud by gas chromatography, the mass concentration is 0.32%, the content of polyacrylamide by gel chromatography, the mass concentration is 0.18%, and the content of carboxymethyl cellulose by ultraviolet spectrophotometry , the mass concentration is 0.75%.

[0036] (2) pH adjustment

[0037] Use hydrochloric acid to adjust the pH of drilling waste mud to 6.5 to eliminate the harmful effect of high pH on degrading bacteria.

[0038] (3) Removal of petroleum hydrocarbons

[0039] According to the test results of petroleum hydrocarbons, the mass concentration is ...

Embodiment 2

[0051] Utilize the method of the present invention to process the drilling waste mud of a block M oil well in Shengli Oilfield, and the amount of waste mud produced by drilling in this block is 5000m 3 ,Specific steps are as follows:

[0052] (1) Determination of petroleum hydrocarbons, polyacrylamide and carboxymethyl cellulose

[0053] Determination of the content of petroleum hydrocarbons in drilling waste mud by gas chromatography, the mass concentration is 0.27%, the content of polyacrylamide by gel chromatography, the mass concentration is 0.25%, and the content of carboxymethyl cellulose by ultraviolet spectrophotometry , the mass concentration is 0.36%.

[0054] (2) pH adjustment

[0055] Sulfuric acid is used to adjust the pH of drilling waste mud to 7.0 to eliminate the harmful effect of high pH on degrading bacteria.

[0056] (3) Removal of petroleum hydrocarbons

[0057] According to the test results of petroleum hydrocarbons, the mass concentration is 0.27%. Pse...

Embodiment 3

[0069] Utilize the method of the present invention to process the drilling waste mud of L oil well in a certain block of Shengli Oilfield, and the amount of waste mud produced by drilling in this block is 8000m 3 ,Specific steps are as follows:

[0070] (1) Determination of petroleum hydrocarbons, polyacrylamide and carboxymethyl cellulose

[0071] The content of petroleum hydrocarbons in the waste drilling mud was determined by ultraviolet absorption photometry, and the mass concentration was 0.12%. The content of polyacrylamide was determined by gel chromatography, and the mass concentration was 0.35%. content, the mass concentration is 0.53%.

[0072] (2) pH adjustment

[0073] Use hydrochloric acid to adjust the pH of drilling waste mud to 7.5 to eliminate the harmful effect of high pH on degrading bacteria.

[0074] (3) Removal of petroleum hydrocarbons

[0075] According to the test results of petroleum hydrocarbons, the mass concentration is 0.12%. Add Pseudomonas a...

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Abstract

The invention relates to a biological treatment method for waste drilling mud. The biological treatment method includes the specific steps of measuring petroleum hydrocarbon, polyacrylamide and carboxymethyl cellulose; regulating pH value of waste drilling mud to be 6.5-7.5 by means of hydrochloric acid or sulphuric acid; removing petroleum hydrocarbon, polyacrylamide and carboxymethyl cellulose sequentially; subjecting mud to solid and liquid separation by centrifugal separation technology after biological treatment; and subjecting the solid waste obtained after separation to curing process by curing agent which is compounded by industrial gypsum, clay and water reducing agent. The biological treatment method has the advantages of simple procedure, mature processing technology and integral process stability, and further has the advantages that mud curing time is shortened, curing strength is improved, safety landfill amount of solid drilling wastes is increased, and space for centralized storage of solid wastes is reduced effectively. Accordingly, the biological treatment method can be applied to treatment of waste drilling mud widespreadly.

Description

technical field [0001] The invention relates to a treatment method for waste liquid in the development process of oil and gas fields, in particular to a biological treatment method for drilling waste mud. Background technique [0002] Drilling waste mud is the waste generated during the development of oil and gas fields. With the exploration and development of unconventional oil and gas resources in recent years, the number of drilling wells has been increasing, and the output of drilling waste mud has also been increasing. Drilling waste mud mainly contains clay, weighted materials, drilling cuttings, sewage, dirty oil and various chemical additives. Among them, hydrocarbons, salts, various polymers, and heavy metal ions such as mercury, copper, arsenic, chromium, zinc, and lead are important sources of pollution. If not handled properly, they will affect the soil, vegetation, groundwater, and Surface water, farmland, etc. will be seriously affected. [0003] At present,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/00C02F11/02
CPCY02W10/20
Inventor 袁长忠徐鹏潘永强徐闯胡婧吴晓玲宋欣刘涛巴燕冯云
Owner CHINA PETROLEUM & CHEM CORP