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Method for harmless treatment of oil sludge sand

A technology for harmless treatment of oily sludge, applied in biological sludge treatment, chemical instruments and methods, water/sludge/sewage treatment, etc. and other problems, to achieve the effect of high input-output ratio, lower processing cost, and simple and convenient equipment installation.

Inactive Publication Date: 2020-02-04
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional biological treatment technology has a long treatment period, generally more than two years, and is suitable for a small range of oil sludge sands. It is only suitable for oil sludge sands with an oil content of less than 5%, and requires a large area of ​​treatment site

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  • Method for harmless treatment of oil sludge sand
  • Method for harmless treatment of oil sludge sand
  • Method for harmless treatment of oil sludge sand

Examples

Experimental program
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Effect test

Embodiment 1

[0026] A joint station G in Shengli Oilfield 21 The properties of the oil sludge sand are as follows: oil content 15.3%, water content 20.5%, average particle size 80 μm, the bacterial concentration of Serratia in the oil sludge sand 2.0×10 2 individual / ml, the bacterial concentration of Methanococcus 1.0×10 3 / ml, the bacterial concentration of anaerobic desulfurization bacteria 1.0×10 3 pieces / ml.

[0027] An abandoned oil reservoir L in Shengli Oilfield 35 , reservoir temperature 75℃, permeability 1200×10 -3 μm 2 , formation water salinity 78525mg / L, crude oil viscosity 1256mPa·s, residual oil saturation 25.6%, recovery degree 35.3%.

[0028] Utilize the method of the present invention to unite station G 21 The oil sludge sand is harmlessly treated and applied to the abandoned oil reservoir L 35 It is used to increase the oil production and methane gas production of abandoned oil reservoirs. The specific steps are as follows:

[0029] (1) Screening of oil sludge san...

Embodiment 2

[0049] A joint station G in Shengli Oilfield 45 The properties of oil sludge sand are as follows: oil content is 17.2%, water content is 22.3%, average particle size is 50 μm, and the bacterial concentration of Arthrobacter in oil sludge sand is 1.0×10 3 individual / ml, the bacterial concentration of Methanosarcina 2.0×10 3 unit / ml, the bacterial concentration of Acinetobacter 2.0×10 2 pieces / ml.

[0050] AR of an abandoned oil reservoir in Shengli Oilfield 5 , reservoir temperature 70℃, permeability 1500×10 -3 μm 2 , Formation water salinity 12568mg / L, crude oil viscosity 2562mPa·s, residual oil saturation 27.2%, recovery degree 32.5%.

[0051] Utilize the method of the present invention to unite station G 45 Harmless treatment of oil sludge sand and application in abandoned oil reservoir AR 5 It is used to increase the oil production and methane gas production of abandoned oil reservoirs. The specific steps are as follows:

[0052] (1) Screening of oil sludge sand

...

Embodiment 3

[0073] D of a joint station in Shengli Oilfield 5 The properties of oil sludge sand are as follows: oil content 19.2%, water content 22.3%, average particle size 60 μm, bacterial concentration of Sphingomonas in oil sludge sand 2.0×10 2 individual / ml, the bacterial concentration of Methanobacterium thermobacterium 2.0×10 3 pcs / ml, concentration of anaerobic Desulfobacillus bacteria 2.0×10 3 pieces / ml.

[0074] An abandoned oil reservoir in Shengli Oilfield M 25 , reservoir temperature 82℃, permeability 500×10 -3 μm 2 , formation water salinity 32567mg / L, crude oil viscosity 985mPa·s, residual oil saturation 21.3%, recovery degree 31.5%.

[0075] Utilize the method of the present invention to union station D 5 The oil sludge sand is treated harmlessly and applied to the abandoned oil reservoir M 25 It is used to increase the oil production and methane gas production of abandoned oil reservoirs. The specific steps are as follows:

[0076] (1) Screening of oil sludge sand...

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Abstract

The invention belongs to the technical field of oil-containing solid waste treatment technologies and oil production engineering, and particularly relates to a method for harmless treatment of oil sludge sand. The method includes the following steps: (1) screening of the oil sludge sand; (2) screening of an activator; (3) determination of reaction conditions; (4) an anaerobic reaction and methanegas collection; (5) screening of an abandoned oil reservoir; and (6) injection of the oil sludge sand subjected to the anaerobic reaction into the abandoned oil reservoir. Compared with conventional oil sludge sand treatment, the method has the advantage of recovering energy methane gas, and meanwhile, the treated oil sludge sand is injected into the reservoir, so that environmental pollution caused by external discharging is avoided, and the treatment cost of the oil sludge sand is greatly lowered; and meanwhile, the abandoned reservoir treated by the method has the advantages of long effective period, high input-output ratio and good field test effect, the effective period is more than three years, the recovery ratio is increased by 10% or above, the methane gas yield reaches 5.0*10<7> m3 or above, and the input-output ratio reaches 1:12 or above.

Description

technical field [0001] The invention belongs to the technical fields of oily solid waste treatment technology and oil recovery engineering, and in particular relates to a method for harmless treatment of oil sludge and sand. Background technique [0002] Oilfield produced fluid deposits are oily solid wastes produced during the oilfield development process. They mainly come from joint stations, oil production sites and gathering and transportation, and they need to be disposed of in a timely manner. The existing dominant processes include incineration and profile control, accounting for more than 80% of the current total treatment capacity. Due to the high cost of incineration treatment, which increases the operating pressure of enterprises, and this process is not suitable for sediments with high water content or low oil content and low calorific value, the application range of this method is getting smaller and smaller. Profile control treatment has relatively strict requ...

Claims

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Application Information

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IPC IPC(8): C02F11/04C10L3/08E21B43/22C02F101/32C02F103/10
CPCC02F11/04C02F2101/32C02F2103/10C10L3/08E21B43/16Y02E50/30
Inventor 林军章丁明山谭晓明汪卫东曹嫣镔岳胜辉张守献宋永亭王静冯云
Owner CHINA PETROLEUM & CHEM CORP
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