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Sodium dodecyl sulfonate-bacitracin compound and compound oil displacement agent

A technology of sodium dodecyl sulfonate and compound oil displacement, applied in the directions of bacitracin, drilling composition, peptide, etc., can solve the problem of weakened microbial movement ability, inability to achieve microbial oil displacement, and reduced microbial oil displacement effect, etc. problems, 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: 2022-05-10
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 dodecyl sulfonate-bacitracin compound and compound oil displacement agent
  • Sodium dodecyl sulfonate-bacitracin compound and compound oil displacement agent
  • Sodium dodecyl sulfonate-bacitracin compound and compound oil displacement agent

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Effect test

Embodiment 1

[0071] This embodiment provides a kind of microbial-chemical composite oil displacement agent, and it is prepared through the following steps:

[0072] (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;

[0073] (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 bacitracin (during the chromatographic separation, the retention time of the upper capsule solution was based on the bacitracin stand...

Embodiment 2

[0080] This embodiment provides a kind of microbial-chemical composite oil displacement agent, and it is prepared through the following steps:

[0081] (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;

[0082] (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 bacitracin (during the chromatographic separation, the retention time of the upper capsule solution was based on the bacitracin stand...

Embodiment 3

[0086] This embodiment provides a kind of microbial-chemical composite oil displacement agent, and it is prepared through the following steps:

[0087] (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;

[0088] (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 bacitracin (during the chromatographic separation, the retention time of the upper capsule solution was based on the bacitracin stand...

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Abstract

The invention provides a sodium dodecylsulfonate-bacitracin compound and a composite oil displacement agent. The chemical structural formula of the sodium dodecylsulfonate-bacitracin compound is as follows:. The invention provides a sodium dodecylsulfonate-bacitracin compound oil displacement agent containing a sodium dodecylsulfonate-bacitracin compound obtained by reacting sodium dodecylsulfonate and bacitracin. The composite oil displacement agent can be well compounded with oil production functional bacteria to form a microbial-chemical composite oil displacement agent. The microbial-chemical composite oil displacement agent not only has the effect of microbial flooding on crude oil degradation and viscosity reduction, but also has the emulsification and viscosity reduction effect of chemical flooding, and through the biological carrying method, the chemical oil displacement agent can expand the swept volume and dispersion efficiency in the oil layer, Effectively improve the synergistic reaction efficiency of microorganisms and chemical agents to achieve the goal of 1+1>2.

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 dodecylsulfonate-bacitracin compound and the 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 microbial cells. By injecting microorganisms with oil recovery functions...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07K7/58C07K1/107C12P21/04C09K8/584
CPCC07K7/58C12P21/02C09K8/584
Inventor 宋文枫赵越王璐章骏张帆
Owner PETROCHINA CO LTD
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