Oil field drilling sludge treatment and comprehensive utilization method

A technology for sludge treatment and oilfield drilling, applied in the fields of sludge treatment, sludge treatment, biological sludge treatment, etc., can solve the problems of environmental pollution, low calorific value, and few practical applications, so as to increase production and improve biochemical performance. , the effect of reducing energy consumption

Inactive Publication Date: 2016-07-06
WUHAN UNIV OF TECH
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  • Abstract
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  • Claims
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Problems solved by technology

Some researchers have used the calorific value of crude oil in sludge to mix sludge with other substances to make industrial coal, but due to the shortcomings of high ash content, low calorific value, and environmental pollution after combustion, the practical application is seldom
[0004] Chinese patent 200810014271.7 and other patents involve the method of mixing oily sludge and mud to prepare unburned bricks. However, since the original sludge has not been further processed, the volume of the sludge has not been reduced, and a large amount of cement, river sand and other materials need to be added. Comprehensive Inefficient use
Although the invention application can solve the problem of secondary pollution, it has no technical inspiration for comprehensive utilization of waste, and the cost of the extraction agent is relatively high

Method used

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  • Oil field drilling sludge treatment and comprehensive utilization method
  • Oil field drilling sludge treatment and comprehensive utilization method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The oily sludge used in this example has an oil content of 15%, a moisture content of 73%, and a sand content of 10%. The method for the treatment and comprehensive utilization of the oilfield drilling sludge comprises the following steps in sequence:

[0032]1) Removal of solid impurities: mix oily sludge and water at a mass ratio of 1:4, remove solid impurities such as large particles of sediment in the oily sludge through a fine grid after mixing, and the net width of the grid gap is 10mm;

[0033] 2) Removal of heavy metal salts by electroadsorption: passing the oily sludge water treated in step (1) through an electrosorption cell to remove heavy metal salts in the oily sludge;

[0034] The electrode in the electric adsorption cell is prepared by mixing activated carbon powder and carbon black at a mass ratio of 9:2, adding deionized water and absolute ethanol to make a mixed solution, heating at 70°C and stirring for 2 hours, and then pressing into a sheet. into; ...

Embodiment 2

[0045] The difference between this embodiment and Embodiment 1 is that the ultrasonic power used is 175W.

Embodiment 3

[0047] The difference between this embodiment and Embodiment 1 is that the ultrasonic power used is 220W.

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PUM

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Abstract

The invention relates to the technical field of resource development, in particular to an oil field drilling sludge treatment and comprehensive utilization method.The method sequentially comprises the steps of solid impurity removal, heavy metallic salt removal through electro-adsorption, ultrasonic demulsification and anaerobic fermentation.Gas obtained after anaerobic fermentation is subjected to desulfuration so that methane can be obtained.An obtained solid-liquid mixture is treated in a settling pond, upper-layer digestive liquid is sterilized and then discharged after meeting the discharge standard, and lower-layer sludge is thickened and then mixed with an additive to generate cement raw materials.Compared with the prior art, the method has the advantages that a complete method is provided for oil field drilling sludge treatment, oily sludge is treated in a reducing and harmless mode, maximum resource utilization of oily sludge is achieved, and the method has great significance in ecological environmental protection and sustainable development of the petroleum industry.

Description

technical field [0001] The invention relates to the technical field of resource development, in particular to a method for treating and comprehensively utilizing oilfield drilling sludge. Background technique [0002] In the process of oil extraction, storage and transportation, and refining and processing, a large amount of waste oily sludge will be produced. The output of oily sludge is not only huge, but also contains a large amount of benzene series, phenols, anthracene, pyrene, pyrene and other foul-smelling toxic substances. The volatilization of oil and gas causes the air quality in the production area to have a phenomenon that the total hydrocarbon concentration exceeds the standard; scattered and piled Oily sludge pollutes surface water and even groundwater; oily sludge contains a large amount of crude oil, which will cause excessive oil in the soil, soil compaction, damage to vegetation in the area, degrade grassland, and affect the ecological environment. If it i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/00C02F11/04C02F11/12C04B7/24C02F103/10C02F101/20
CPCC02F11/00C02F11/006C02F11/04C02F11/12C02F2101/20C02F2103/10C04B7/24Y02E50/30Y02P40/10Y02W10/20
Inventor 李孟凃郑鹏
Owner WUHAN UNIV OF TECH
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