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Temperature-resistant salt-tolerant microbial fermentation broth foam system and preparation method thereof

A technology of microbial fermentation liquid and foam system, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problem of failure to achieve the effect of plugging and regulating flooding, restricting the promotion of foam flooding technology, and difficult to achieve oil recovery, etc. problem, to achieve the effect of enhanced oil recovery, simple preparation method and low cost

Inactive Publication Date: 2020-02-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, due to the poor stability and easy collapse of foam fluid in high-temperature and high-salt formation conditions, it is difficult to achieve a good plugging and control effect, and it is difficult to achieve the purpose of effectively improving oil recovery, which restricts the promotion of foam flooding technology in oil fields

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The preparation of embodiment 1 fermented liquid foam system A

[0024] (1) First add 94.95kg of formation water into the reactor, then add 5kg of Pseudomonas fermentation broth while stirring at 40°C, the stirring speed is 200rpm, and the stirring time is 1h, then add Sphingomonas 0.05 kg of fermented liquid was stirred at 60° C. for 38 hours at a stirring speed of 400 rpm, and the foam was uniformly stirred.

[0025] (2) Under normal temperature conditions, uniformly fill 500L of foaming air into the foaming agent at a rate of 1L / min, and then stir for 20min at a stirring speed of 3000rpm to obtain the fermentation broth foam system A.

[0026] The biosurfactant content in the Pseudomonas fermentation broth is 42.5g / L, the surface tension is 12.5mN / m, and the interfacial tension is 0.2mN / m.

[0027] The content of the biopolymer in the sphingomonas fermentation broth is 56.3g / L.

[0028] The formation water mentioned above is the oil well output fluid from Zhan 3 in...

Embodiment 2

[0030] The preparation of embodiment 2 fermented liquid foam system B

[0031] (1) First add 93.9kg of formation water into the reactor, then add 6kg of Geobacillus fermentation broth while stirring at 45°C, the stirring speed is 300rpm, and the stirring time is 2h, then add 0.1 kg of Xanthomonas fermentation broth kg, stirred at a temperature of 65° C. for 42 hours at a stirring speed of 300 rpm, and stirred evenly to obtain a foaming agent.

[0032] (2) Under normal temperature conditions, uniformly fill 800L of foaming gas nitrogen into the foaming agent at a rate of 3L / min, and then stir for 25min at a stirring speed of 4000rpm to obtain the fermentation broth foam system B.

[0033] The biosurfactant content in the Geobacillus fermentation broth is 47.2g / L, the surface tension is 10.3mN / m, and the interfacial tension is 0.3mN / m.

[0034] The content of the biopolymer in the Xanthomonas fermented liquid is 60.2g / L.

[0035] The formation water is the oil well output flui...

Embodiment 3

[0037] The preparation of embodiment 3 fermented liquid foam system C

[0038] (1) first add 89.8kg of formation water in the reactor, then add 10kg of Bacillus fermented liquid while stirring under the temperature condition of 50°C, the stirring speed is 400rpm, and the stirring time is 2h, then add 0.2kg of Sclerotinia fermented liquid, Stir at a temperature of 70° C. for 48 hours at a stirring speed of 500 rpm, and stir evenly to obtain a foaming agent.

[0039] (2) Under normal temperature conditions, evenly fill the foaming agent with CO at a speed of 5L / min. 2 1000L, and then stirred at a stirring speed of 5000rpm for 30min to obtain a fermentation broth foam system C.

[0040] The content of the biosurfactant in the Bacillus fermentation broth is 53.6g / L, the surface tension is 15.2mN / m, and the interfacial tension is 0.25mN / m.

[0041] The content of the biopolymer in the fermentation broth of Sphingomonas sphingomonas, Xanthomonas bacterium and Sclerotinia is 51.7g / ...

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Abstract

The invention belongs to the technical field of tertiary oil recovery, and particularly relates to a temperature-resistant salt-tolerant microbial fermentation broth foam system and a preparation method thereof. The system comprises a foam agent and foaming gas, wherein the foam agent comprises a foaming agent, a foam stabilizer and formation water, the foaming agent is a fermentation broth for producing biosurfactant bacteria, the biosurfactant bacteria are one selected from pseudomonas, bacillus licheniformis and bacillus, the foam stabilizer is a fermentation broth for producing biopolymerbacteria, the biopolymer bacteria are one selected from sphingomonas, xanthomonas and sclerotium rolfsii, and the foaming gas is one selected from air, nitrogen and CO2. According to the invention, the fermentation broth foam system has advantages of simple preparation method, low cost, strong foam stability, good field test effect, no subsequent treatment of output liquor and no pollution to theenvironment, so that the system can be widely applied to the foam flooding technology of oil reservoirs.

Description

technical field [0001] The invention belongs to the technical field of tertiary oil recovery, and in particular relates to a temperature-resistant and salt-resistant microbial fermentation liquid foam system and a preparation method thereof. Background technique [0002] With the deepening of oilfield development, the reservoirs in the later stage of development gradually enter the stage of high water cut, the dominant channel has been formed, and the contradiction of heterogeneity is intensified, which seriously affects the development effect of the oilfield. High-temperature and high-salt reservoirs have gradually become the main target of mature oilfield development. Foam flooding technology is one of the measures to effectively enhance oil recovery in the late stage of oilfield development, and it has good plugging profile control performance and selectivity to oil and water. In addition, foam flooding can effectively reduce the adverse effects of viscous fingering and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/582C09K8/584C09K8/94C09K8/518C09K8/506
CPCC09K8/506C09K8/518C09K8/582C09K8/584C09K8/94
Inventor 曹嫣镔李彩风吴晓玲刘涛高光军郭辽原孙刚正宋永亭林军章谭晓明
Owner CHINA PETROLEUM & CHEM CORP
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