Method for resource utilization of oil production sludge of oilfield

A technology of oil production sludge and resource utilization, applied in chemical instruments and methods, pyrolysis treatment of sludge, inorganic chemistry, etc., can solve the problems of failure to promote, soft and black road surface, etc., and achieve the goal of improving oil recovery Effect

Active Publication Date: 2011-05-25
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The bricks have been fired successfully, but the stability of the bricks cannot be achieved, and they are not beautiful and black, so they have not been promoted
[0010] At the same time, Zhongyuan Oilfield also used this sludge to repair a section of road, but because the oil contained in it was not easy to handle, the road surface was soft and could not withstand rolling, so it could not be popularized.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Take 10 grams of oil extraction sludge, put it at 300 ° C for 30 minutes, and leave 4.2 grams of yellow dry sludge, then put 4.2 grams of dry sludge into a muffle furnace at 900 degrees and roast for 30 minutes, you can get A mixture containing calcium oxide, which can be dissolved in water to obtain an aqueous solution with a pH of 14, which can be used for oilfield water treatment; the aqueous solution also contains 12% sediment, which can be discarded after analysis to meet the discharge standard Of. The released carbon dioxide must be collected and utilized in a special device.

Embodiment 2

[0018] Take 50 grams of oil extraction sludge, put it at 500 ° C for 5 minutes, and leave 20 grams of yellow dry sludge, then put 20 grams of dry sludge into a muffle furnace at 900 degrees and roast for 30 minutes, you can get A mixture containing calcium oxide, which can be dissolved in water to obtain an aqueous solution with a pH of 14, which can be used for oil field water treatment; the aqueous solution also contains 6 grams of sediment, which can reach the discharge standard after analysis.

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PUM

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Abstract

The invention relates to a method for resource utilization of oil production sludge of an oilfield, and the method comprises the following steps: firstly decomposing a small quantity of hydrocarbons contained in the oil production sludge of the oilfield at the temperature of 300 DEG C-500 DEG C for generating low molecular hydrocarbons and carbon dioxide, simultaneously removing water contained therein by evaporation, further increasing the temperature to 898-900 DEG C, calcining, generating mixture containing calcium oxide and the carbon dioxide, leading the carbon dioxide to pass through collection / pressurization / injection devices for being injected into an oil well for gas injection oil production, using water for dissolving the mixture containing the calcium oxide, generating calcium oxide water solution with pH of 14 and a small quantity of sediment, using the calcium oxide water solution for oilfield water treatment and construction material, emitting the small quantity of the sediment by achieving the standard, generating the calcium oxide and the carbon dioxide which can be utilized through high-temperature calcination, only remaining 12% of residues after treatment, beingcapable of achieving the emission standard and realizing the thorough eradication of the sludge.

Description

Technical field: [0001] The invention relates to a method for resource utilization of oil field oil production sludge for oil field environmental protection and solid waste resource utilization. Background technique: [0002] Oil production sludge is a by-product produced in the oil production process of the oil production plant. Because the by-product contains petroleum and other prohibited substances, it is piled up in the oil production plant, and it has accumulated into mountains over time, which has increasingly seriously endangered the ecological environment of the oil production plant area. [0003] Oil production sludge has different physical states and characteristics (such as thin oil sludge and heavy oil sludge, etc.) with different oil properties and reservoir characteristics, so it presents different treatment difficulties. At present, my country's scientific and technological personnel have done a lot of exploration and research work on the resource utilization...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F11/06C01B31/20C02F11/10C01B32/50
Inventor 李芮丽
Owner PETROCHINA CO LTD
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