Biodemulsifier, its preparation method and application
A biological demulsifier and a technology for producing strains, applied in biochemical equipment and methods, methods based on microorganisms, methods using microorganisms, etc., to achieve the effect of low dosage concentration and shortened demulsification time
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Embodiment 1
[0027] Embodiment one: the preparation of bacterial agent
[0028] 1. Bacteria: Bacillus subtilis Cohn, 1.1413, American H16-5
[0029] 2. Culture medium:
[0030] Culture medium includes:
[0031] NH 4 CL: 0.304%
[0032] K 2 HPO 4 .3H 2 O: 0.812%
[0033] MgSO 4 .7H 2 O: 0.02%
[0034] CaCl 2 .2H 2 O: 0.002%
[0035] pH6.0
[0036] Raw material oil for fermentation: liquid paraffin, dosage 3%
[0037] 3. Shake flask culture:
[0038] Two rings of each slant strain were placed in a 100ml Erlenmeyer flask, cultured on a shaker at 30°C and 180r / min for 48 hours, then transferred to a Erlenmeyer flask containing 500ml medium for 48 hours.
[0039] 4. Fermentation tank production
[0040] Add 5L of medium into the 10L stirred fermenter, and transfer a 500ml strain of the above-mentioned cultured large shake flask to the fermenter. The composite functional microbial agent is produced under different production conditions such as double fermentation, and the disch...
Embodiment 2
[0047] Example 2: Demulsification of oil-in-water produced fluid in Shengli Oilfield using fermented bacteria
[0048] Under the condition of 30-35 ℃, the production fluid of Gudao Oil Production Plant of Shengli Oilfield (crude oil viscosity 400mPa.s) was treated. In 10ml of oil-in-water oilfield emulsion, add the wet bacteria obtained by fermentation according to different proportions, shake it back and forth 200 times by hand, and let it stand for 10 minutes. Deals with demulsification effects. After several experiments, the following results were obtained: oil-water layer, the interface is black and white, neat, horizontal, in a line, the exfoliated water is colorless and transparent, and the oil content of the exuded water is 50-200ppm. The effective dosage of fermented wet bacteria is within 2‰.
Embodiment 3
[0049] Example 3: Demulsification test of oil-in-water produced fluid in Shengli Oilfield with fermented bacteria
[0050] Under the condition of 20-25 ℃, the production fluid of Gudao Oil Production Plant of Shengli Oilfield (crude oil viscosity 400mPa.s) was treated. In 10ml of oil-in-water oilfield emulsion, add the wet bacteria obtained by fermentation according to different proportions, shake it back and forth 200 times by hand, and let it stand for 10 minutes. Deals with demulsification effects. After several experiments, the following results were obtained: oil-water layer, the interface is black and white, neat, horizontal, in a line, the exfoliated water is colorless and transparent, and the oil content of the exuded water is 50-200ppm. The effective dosage of fermented wet bacteria is between 0.1-1‰.
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