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A biological wetting reversal agent for high-temperature and high-salt heavy oil reservoirs and its preparation method

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 Simple process and wide application range

Active Publication Date: 2022-04-12
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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  • A biological wetting reversal agent for high-temperature and high-salt heavy oil reservoirs and its preparation method
  • A biological wetting reversal agent for high-temperature and high-salt heavy oil reservoirs and its preparation method
  • A biological wetting reversal agent for high-temperature and high-salt heavy oil reservoirs and its preparation method

Examples

Experimental program
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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, in particular to a biological wetting reversal agent for high-temperature, high-salt heavy oil reservoirs and a preparation method thereof. The composition and components of the reversal agent are as follows: rhamnolipid fermentation broth 20-30wt%; sophorolipid fermentation broth 15-20wt%; alkyl polyglycosides 3-5wt%; Measure water. The rhamnolipid fermentation liquid is a Pseudomonas aeruginosa fermentation liquid, and its concentration is greater than 35g / L; the sophorolipid fermentation liquid is a yeast fermentation liquid, and its concentration is greater than 100g / L; the alkyl polyglycoside is a biological type Anionic non-ionic surfactant, its relative molecular weight is 290-370; the alcohol additive is one of butanol, pentanol and hexanol. The biological wetting reversal agent of the present invention has the advantages of wide application range of oil reservoirs, simple construction technology and good field test effect, the validity period is more than 24 months, the daily oil increase of a single well is more than 10 tons, and the input-output ratio is more 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 Patents(China)
IPC IPC(8): C12P19/44C09K8/584C09K8/60C12R1/385C12R1/645
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