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Biological fermentation nano-enzyme plugging oil displacement agent and preparation method thereof

A bio-fermentation, nano-enzyme technology, applied in chemical instruments and methods, drilling compositions, etc., can solve problems such as blockage, decrease in reservoir permeability, reservoir environmental pollution, etc., achieve strong rigidity, reduce interfacial tension, The effect of low dehydration rate

Active Publication Date: 2022-01-04
德源生物工程科技(吉林)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But there are serious problems: due to the adsorption and retention of surfactants in porous media, the smaller pore throats are blocked, resulting in a decrease in reservoir permeability and pollution to the reservoir environment

Method used

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  • Biological fermentation nano-enzyme plugging oil displacement agent and preparation method thereof
  • Biological fermentation nano-enzyme plugging oil displacement agent and preparation method thereof
  • Biological fermentation nano-enzyme plugging oil displacement agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] The bio-fermentation nano-enzyme plugging and oil-displacing agent of this embodiment is prepared by the following composition by weight percentage: 3wt% bioactive molecules, 10wt% surfactant, 4wt% hydrophobic surface modified silica, 1wt% ethanol; the balance is water. Among them, the biologically active molecules are prepared by fermentation of Pseudomonas, and the surfactant is fatty alcohol polyoxyethylene ether sulfate AES, which is mixed evenly according to the above preparation method, and the "plugging regulating oil displacement preparation A" is obtained.

[0050] The biologically active molecules are prepared by fermentation of Pseudomonas, and the preparation conditions are as follows: the medium for preparing the fermentation product of Pseudomonas contains 0.5% vegetable oil, 0.5% corn syrup and vitamins, and 0.1% KH 2 PO 4 , 0.01-0.5% NaNO 3 , 0.1% yeast powder, 0.1% xanthan gum. The pH value of the special medium is 6. Preparation conditions: the rea...

Embodiment 2

[0053] The bio-fermentation nano-enzyme plugging and oil-displacing agent of this embodiment is prepared by the following composition by weight percentage: 9wt% bioactive molecules, 3wt% surfactant, 10wt% hydrophobic surface modified silica, 3wt% ethanol; the balance is water. Among them, the biologically active molecules are prepared by fermentation of Pseudomonas, and the surfactant is fatty alcohol polyoxyethylene ether sulfate AES, which is mixed evenly according to the above-mentioned preparation method to obtain the "blockage regulating oil displacement preparation B".

[0054] The biologically active molecules are prepared by fermentation of Pseudomonas, and the preparation conditions are as follows: the medium for preparing the fermentation product of Pseudomonas can contain 10% vegetable oil, 3% corn syrup and vitamins, and 1.0% KH 2 PO 4 , 0.5% NaNO 3 , 0.2% yeast powder, 0.2% xanthan gum. The pH value of the special medium is 8. Preparation conditions: the react...

Embodiment 3

[0057] The bio-fermentation nano-enzyme plugging and oil-displacing agent of this embodiment is prepared by the following composition by weight percentage: 15wt% bioactive molecules, 2wt% surfactant, 15wt% hydrophobic surface modified silica, 6wt% ethanol; the balance is water. Among them, the biologically active molecules are prepared by fermentation of Bacillus, and the surfactant is fatty alcohol polyoxyethylene ether sulfate AES, which is mixed evenly according to the above-mentioned preparation method to obtain the "blockage regulating oil displacement preparation C".

[0058] Wherein the bioactive molecule is prepared by fermentation of Bacillus, and the preparation conditions are as follows: the culture medium for Bacillus to prepare the fermentation product may contain 0.5% vegetable oil, 3% corn syrup and vitamins, and 0.1% KH 2 PO 4 , 0.01% NaNO 3 , 0.2% yeast powder, 0.2% xanthan gum. The pH value of the special medium is 8. Preparation conditions: the reaction ...

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Abstract

The invention discloses a biological fermentation nano-enzyme plugging oil displacement agent and a preparation method thereof, and belongs to the technical field of oil and gas development. The biological fermentation nano-enzyme plugging oil displacement agent comprises the following components: biological active molecules prepared by biological fermentation, a surfactant, surface modified silicon dioxide and alcohol. The preparation method comprises the following steps: in water of 10 DEG C-40 DEG C, preparing bioactive molecules prepared by biological fermentation into an aqueous solution according to a preparation ratio, and fully stirring; adding surface modified silicon dioxide according to the preparation proportion, and fully stirring; then adding alcohol and fully stirring; and finally, adding the surfactant, and fully stirring. At low concentration or low temperature, the biological fermentation nano-enzyme plugging oil displacement agent has the effects of reducing interfacial tension, solubilizing, emulsifying and the like in oil reservoirs; under high temperature and high concentration, a high-permeability layer, bottom water and edge water are plugged in the oil reservoirs; and meanwhile, in-situ water plugging of the oil reservoirs can be achieved, and the biological fermentation nano-enzyme plugging oil displacement agent can be applied to various oil reservoirs and can be applied to the field of oil field yield increase on a large scale.

Description

technical field [0001] The invention belongs to the technical field of oil and gas development, and in particular relates to a bio-fermentation nano-enzyme plugging-regulating and oil-displacing agent and a preparation method thereof. Background technique [0002] With the continuous development of oil and gas fields, the high water content of oil well production fluid has long been a common problem in the development process. The contradiction between layers and layers is prominent, and the heterogeneity is enhanced, which leads to the formation of dominant channels in the formation, and even the formation of water. Phenomena such as coning or water channeling cause premature water breakthrough or water flooding in oil wells, low water flooding efficiency or ineffective circulation, and low ultimate recovery. [0003] In order to solve the above problems, more and more attention has been paid to oil layer profile control technology in oilfield development. Profile control ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/504C09K8/506C09K8/58C09K8/582
CPCC09K8/5045C09K8/506C09K8/582C09K8/58C09K2208/10
Inventor 夏文杰
Owner 德源生物工程科技(吉林)有限公司