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Sodium lauryl polyoxyethylene ether sulfate-bacitracin compound and composite oil displacement agent

A technology of sodium dodecyl polyoxyethylene ether sulfate and compound oil displacement, which is applied in the directions of drilling compositions, peptides, chemical instruments and methods, etc., can solve the problem of the weakening of microbial movement ability, the inability to realize oil displacement by microorganisms, and the reduction of oil displacement. microbial flooding effect and other issues, to achieve the effect of expanding the sweep volume and dispersion efficiency, strong operability and applicability, and improving the efficiency of synergistic reactions

Active Publication Date: 2020-10-13
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, the addition of chemical oil displacement agents and their reaction process often destroy the physiological functions of microorganisms, reduce the effect of microbial oil displacement, and even cause large-scale death of microorganisms, resulting in the failure of microbial oil displacement.
In addition, the addition of chemical oil displacement agents will also lead to the weakening of microbial movement and permeability, making it difficult to produce substantial oil displacement in low permeability reservoirs

Method used

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  • Sodium lauryl polyoxyethylene ether sulfate-bacitracin compound and composite oil displacement agent
  • Sodium lauryl polyoxyethylene ether sulfate-bacitracin compound and composite oil displacement agent
  • Sodium lauryl polyoxyethylene ether sulfate-bacitracin compound and composite oil displacement agent

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Effect test

Embodiment 1

[0069] This embodiment provides a kind of microbial-chemical composite oil displacement agent, and it is prepared through the following steps:

[0070] (1) Add 200mL of the culture medium of the inoculated strain to a 500mL Erlenmeyer flask, place it in an air-bath shaker at 65°C and 170r / min for cultivation, and when the bacteria grow to the late logarithmic period, centrifuge at 8000r / min for 15min to collect the cells , washed with dilute sulfuric acid (pH value = 2) to remove impurities, and suspend the bacteria to make a suspension (1cm cuvette) with an absorbance value of 1 at a wavelength of 600nm. Centrifuge for 10 minutes to collect the lower layer of bacteria;

[0071] (2) Bacteria were eluted with water at 40°C for 12 hours, centrifuged, and the upper capsule solution was taken for chromatographic separation and purification to obtain the bacitracin compound (during the chromatographic separation, the retention time of the upper capsule solution was determined accor...

Embodiment 2

[0078] This embodiment provides a kind of microbial-chemical composite oil displacement agent, and it is prepared through the following steps:

[0079] (1) Add 200mL of the culture medium of the inoculated strain to a 500mL Erlenmeyer flask, place it in an air-bath shaker at 65°C and 170r / min for cultivation, and when the bacteria grow to the late logarithmic period, centrifuge at 8000r / min for 15min to collect the cells , washed with dilute sulfuric acid (pH value = 2) to remove impurities, and suspend the bacteria to make a suspension (1cm cuvette) with an absorbance value of 1 at a wavelength of 600nm. Centrifuge for 10 minutes to collect the lower layer of bacteria;

[0080] (2) Bacteria were eluted with water at 40°C for 12 hours, centrifuged, and the upper capsule solution was taken for chromatographic separation and purification to obtain the bacitracin compound (during the chromatographic separation, the retention time of the upper capsule solution was determined accor...

Embodiment 3

[0084] This embodiment provides a kind of microbial-chemical composite oil displacement agent, and it is prepared through the following steps:

[0085] (1) Add 200mL of the culture medium of the inoculated strain to a 500mL Erlenmeyer flask, place it in an air-bath shaker at 65°C and 170r / min for cultivation, and when the bacteria grow to the late logarithmic period, centrifuge at 8000r / min for 15min to collect the cells , washed with dilute sulfuric acid (pH value = 2) to remove impurities, and suspend the bacteria to make a suspension (1cm cuvette) with an absorbance value of 1 at a wavelength of 600nm. Centrifuge for 10 minutes to collect the lower layer of bacteria;

[0086] (2) Bacteria were eluted with water at 40°C for 12 hours, centrifuged, and the upper capsule solution was taken for chromatographic separation and purification to obtain the bacitracin compound (during the chromatographic separation, the retention time of the upper capsule solution was determined accor...

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Abstract

The invention provides a sodium lauryl polyoxyethylene ether sulfate-bacitracin compound and a composite oil displacement agent. The chemical structural formula of the sodium lauryl polyoxyethylene ether sulfate-bacitracin compound is shown in a specification. The invention provides the sodium lauryl polyoxyethylene ether sulfate-bacitracin composite oil displacement agent containing the sodium lauryl polyoxyethylene ether sulfate-bacitracin compound which is obtained by reaction of sodium lauryl polyoxyethylene ether sulfate and bacitracin. The compound oil displacement agent can be well compounded with oil recovery functional bacteria to form a microorganism-chemical compound oil displacement agent. The microbial-chemical composite oil displacement agent has a crude oil-degrading viscosity-reducing effect by microbial flooding and an emulsifying viscosity-reducing effect by chemical flooding. Through a biological carrying mode, the swept volume and the dispersion efficiency of a chemical flooding agent in an oil layer are increased, the synergistic reaction efficiency of microorganisms and a chemical agent is effectively improved, and the purpose that one plus one is greater thantwo is achieved.

Description

technical field [0001] The invention belongs to the technical field of tertiary oil recovery, and relates to the preparation and application of a microbial-chemical composite oil displacement agent, in particular to a sodium lauryl polyoxyethylene ether sulfate-bacitracin compound and a composite oil displacement agent. Background technique [0002] With the rapid development of the national economy, the demand for oil continues to increase, and the contradiction between oil consumption and supply has become more prominent. In order to solve the above contradictions, in addition to increasing exploration efforts and continuing to search for oil resources, increase crude oil recovery in developed oil fields Rate is also one of the effective ways. [0003] Microbial enhanced oil recovery (MEOR) is a technology that enhances oil recovery by utilizing the natural biochemical effects (biodegradation and metabolites) of living cells of microorganisms. By injecting microorganisms ...

Claims

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Application Information

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IPC IPC(8): C07K7/06C09K8/584C09K8/582
CPCC07K7/06C09K8/584C09K8/582
Inventor 宋文枫赵越章骏魏小芳田茂章黄佳
Owner PETROCHINA CO LTD
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