Method adopting microbe microbial enhanced oil recovery (MEOR) technology for water-based extraction of bitumen in oil sands

A technology for microbial oil flooding and asphalt oil is applied in the field of using microbial oil flooding technology (MEOR) water-based extraction of asphalt oil from oil sands and water-based oil sands to extract asphalt oil, which can solve problems such as inapplicability and improve the recovery rate. , high recovery rate, the effect of improving quality

Inactive Publication Date: 2014-06-18
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Claims
  • Application Information

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Problems solved by technology

However, the disadvantage of this method is that it can only be used for hydrophilic oil sands, but it is not applicable to oil sands (lipophilic) in most parts of my country.

Method used

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  • Method adopting microbe microbial enhanced oil recovery (MEOR) technology for water-based extraction of bitumen in oil sands
  • Method adopting microbe microbial enhanced oil recovery (MEOR) technology for water-based extraction of bitumen in oil sands

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Embodiment 1

[0017] Selection of oil sands: weathered oil sands, taken from Zhalaite Banner, Inner Mongolia, its basic composition and content are as follows: solid components (sand, clay) 89 wt%, asphalt 10.4 wt%, water 0.6 wt%. Because the surface of the solid components (sand, clay) in the oil sand is strongly hydrophobic, this type of oil sand produces little or no bitumen foam during normal flotation, so water-based extraction of bitumen oil cannot be performed.

[0018] Process for water-based extraction of asphalt oil from oil sands:

[0019] (1) Accurately weigh 300 g of oil sand, transfer it to a 500ml Erlenmeyer flask, and then add 300ml of culture system, which is composed of inorganic medium and aqueous solution of trace elements, and per liter of culture system, inorganic medium: Na 2 HPO 4 12H 2 O: 3g, KH 2 PO 4 : 11 g, NaNO 3 : 5 g, NaCl: 1 g, CaCl 2 : 0.1 g, MgSO 4 : 0.25 g; trace elements: FeCl 3 ·6H 2 O: 0.08 g, ZnSO 4 ·7H 2 O: 0.75 g, CuSO 4 ·5H 2 O: 0.075...

Embodiment 2

[0023] Selection of oil sand: Oil sand ore with high electrolyte and high clay content is taken from Heiyoushan, Xinjiang. Its basic composition and solid components (sand, clay) are 92.3 wt%, asphalt 5.3 wt%, and water 2.4 wt%. Because the surface of the solid components (sand, clay) in the oil sand is strongly hydrophobic, this type of oil sand produces little or no bitumen foam during normal flotation, so water-based extraction of bitumen oil cannot be performed.

[0024] Process for water-based extraction of asphalt oil from oil sands:

[0025] (1) Accurately weigh 300 g of oil sand, transfer it to a 500ml Erlenmeyer flask, and then add 300ml of culture system, which is composed of inorganic medium and aqueous solution of trace elements, and per liter of culture system, inorganic medium: Na 2 HPO 4 12H 2 O 4 g, KH 2 ·PO 4 : 12 g, NaNO 3 : 6 g, NaCl: 1.5 g, CaCl 2 : 0.15 g, MgSO4 : 0.3 g; trace elements: FeCl 3 ·6H 2 O: 0.1 g, ZnSO 4 ·7H 2 O: 0.8 g, CuSO 4 ·5H ...

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Abstract

The invention provides a method adopting the microbe microbial enhanced oil recovery (MEOR) technology for water-based extraction of bitumen in oil sands and belongs to the field of oil sand separation technology. According to the method, the MEOR technology is adopted to perform the cultivation treatment of microbial bacteria before the water-based extraction to the oil sands, and the physico-chemical property of the oil sands is influenced through the selective action of the microbial bacteria on certain macromolecular materials in the bitumen in the oil sands, so that the recovery rate of the bitumen is effectively increased, the quality of the bitumen is improved, and the problems in bitumen separation recovery of oil sand mines, particularly high-electrolyte and high-clay-content oil sand mines, weathered oil sand mines or other mines which are difficult to treat. The practice proves that through the adoption of the method provided by the utility model for water-based extraction of the bitumen in the oil sands, the recovery rate is up to 98 percent. Therefore, the method has a favorable application prospect in industrial production of oil sand separation extraction.

Description

technical field [0001] The invention belongs to the technical field of oil sand separation, and relates to a method for water-based extraction of asphalt oil from oil sands, in particular to a method for water-based extraction of asphalt oil in oil sands using microbial oil displacement technology (MEOR). Background technique [0002] Oil Sands (Oil Sands), also known as Tar Sands (Tar Sands), its main components include sand or clay, bitumen and water. At present, oil sand reserves are abundant in the world, and its proven reserves account for about 30% of the world's total crude oil reserves. Canada is the country with the largest reserves of oil sands in the world. Its oil sands industrialized mining was earlier and quite developed. In 2010, oil sands mines produced 2 million barrels of crude oil per day, accounting for 40% of Canada's domestic crude oil extraction. my country's oil sand reserves are also quite rich. According to the assessment of my country's oil and ga...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G1/00C10C3/00
Inventor 任嗣利丁明山
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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