Biological wetting reversal agent for high-temperature high-salt heavy oil reservoir, and preparation method thereof

A wetting inversion, heavy oil reservoir technology, applied in the direction of microorganism-based methods, biochemical equipment and methods, microorganisms, etc., can solve the problems of poor temperature and salt resistance, and achieve strong temperature and salt resistance, construction The process is simple and ensures the effect of competitive adsorption advantages

Active Publication Date: 2020-01-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention provides a biological wetting reversal agent for the problem of poor temperature and salt resistance existing in the application of existing wetting agents in high-temperature, high-salt heavy oil reservoirs. The reversal agent includes rhamnolipid fermentation liquid, sophora Glycolipid fermentation broth, alkyl polyglycoside (APG) and alcohol additives, all of which have good temperature and salt resistance, are injected into high-temperature and high-salt oil reservoirs to act on the surface of lipophilic rocks to achieve wettability. Inversion, greatly reducing the flow resistance of heavy oil and improving the development efficiency of water flooding

Method used

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  • Biological wetting reversal agent for high-temperature high-salt heavy oil reservoir, and preparation method thereof
  • Biological wetting reversal agent for high-temperature high-salt heavy oil reservoir, and preparation method thereof
  • Biological wetting reversal agent for high-temperature high-salt heavy oil reservoir, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1 biological wetting reversal agent D 1 and its preparation

[0035] Biological Wetting Reversal Agent D 1 The composition and components are as follows:

[0036]

[0037] The rhamnolipid fermentation broth is a fermentation broth of Pseudomonas aeruginosa, and its concentration is greater than 35g / L.

[0038] The sophorolipid fermentation liquid is a yeast fermentation liquid, and its concentration is greater than 100g / L.

[0039] The alkyl polyglycoside is a biological anionic nonionic surfactant with a relative molecular weight of 290-370.

[0040] Described alcohol auxiliary agent is butanol.

[0041] Biological Wetting Reversal Agent D 1 Preparation of:

[0042] (1) Insert Pseudomonas aeruginosa seed liquid into the sterilized culture medium by 10%, the fermentation condition is 37°C and 180r / min, and ferment for 2 days to obtain rhamnolipid fermentation liquid;

[0043] (2) Insert the yeast seed liquid into the sterilized culture medium by 10%, t...

Embodiment 2

[0047] Example 2 Biological wetting reversal agent D 2 and its preparation

[0048] Biological Wetting Reversal Agent D 2 The composition and components are as follows:

[0049]

[0050] The rhamnolipid fermentation broth is a fermentation broth of Pseudomonas aeruginosa, and its concentration is greater than 35g / L.

[0051] The sophorolipid fermentation liquid is a yeast fermentation liquid, and its concentration is greater than 100g / L.

[0052] The alkyl polyglycoside is a biological anionic nonionic surfactant with a relative molecular weight of 290-370.

[0053] Described alcohol auxiliary agent is amyl alcohol.

[0054] Biological Wetting Reversal Agent D 2 Preparation of:

[0055] (1) Insert Pseudomonas aeruginosa seed liquid into the sterilized culture medium by 10%, the fermentation condition is 38°C and 200r / min, and ferment for 2 days to obtain rhamnolipid fermentation liquid;

[0056] (2) Insert the yeast seed liquid into the sterilized culture medium by 1...

Embodiment 3

[0060] Example 3 Biological Wetting Reversal Agent D 3 and its preparation

[0061] Biological Wetting Reversal Agent D 3 The composition and components are as follows:

[0062]

[0063] The rhamnolipid fermentation broth is a fermentation broth of Pseudomonas aeruginosa, and its concentration is greater than 35g / L.

[0064] The sophorolipid fermentation liquid is a yeast fermentation liquid, and its concentration is greater than 100g / L.

[0065] The alkyl polyglycoside is a biological anionic nonionic surfactant with a relative molecular weight of 290-370.

[0066] Described alcohol auxiliary agent is hexanol.

[0067] Biological Wetting Reversal Agent D 3 Preparation of:

[0068] (1) Insert Pseudomonas aeruginosa seed liquid into the sterilized culture medium by 10%, the fermentation condition is 40° C. and 250 r / min, and ferment for 3 days to obtain rhamnolipid fermentation liquid;

[0069] (2) Insert the yeast seed liquid into the sterilized culture medium by 10%...

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Abstract

The invention relates to a biological wetting reversal agent, and concretely relates to a biological wetting reversal agent for a high-temperature high-salt heavy oil reservoir, and a preparation method thereof. The reversal agent comprises 20-30 wt% of a rhamnolipid fermentation liquor, 15-20 wt% of a sophorolipid fermentation liquor, 3-5 wt% of alkyl polyglycoside, 0.1-0.3 wt% of an alcohol assistant, and the balance of water. The rhamnolipid fermentation liquor is a Pseudomonas aeruginosa fermentation liquor with the concentration of above 35 g/L; the sophorolipid fermentation liquor is a yeast fermentation liquor with the concentration of above 100 g/L; the alkyl polyglycoside is a biological anionic and nonionic surfactant, and the relative molecular weight is 290-370; and the alcoholassistant is one of butanol, pentanol and hexanol. The biological wetting reversal agent has the advantages of wide oil reservoir application range, simple construction process and good field test effect, has a validity period of above 24 months, and allows the daily oil increase of a single well to be more than 10 t and the input-output ratio to be larger than 1:10.

Description

technical field [0001] The invention relates to a biological wetting reversal agent, in particular to a biological wetting reversal agent for high-temperature, high-salt heavy oil reservoirs and a preparation method thereof. Background technique [0002] High-temperature and high-salt reservoirs are a type of unconventional and harsh-condition reservoirs with a reservoir temperature exceeding 80°C and a salinity greater than 30,000 mg / L. This type of reservoir is rich in resources and has great potential value. As the development progresses, these high-temperature and high-salt main blocks gradually enter the stage of high water content development, approaching the economic limit. At this time, in order to improve the development efficiency, it is necessary to adopt the necessary enhanced oil recovery technology to achieve the purpose of increasing production. Single well huff and puff is one of the economical, fast and effective methods, mainly including two processes of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/584C09K8/60C12P19/44C12R1/385C12R1/645
CPCC09K8/584C09K8/602C12P19/44
Inventor 丁明山汪庐山林军章王静高光军郭辽原曹嫣镔宋永亭岳胜辉汪卫东
Owner CHINA PETROLEUM & CHEM CORP
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