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Sodium dodecyl sulfate-bacitracin compound and composite oil displacement agent

A technology of sodium dodecyl sulfonate and compound oil displacement, which is applied in the directions of bacitracin, drilling compositions, peptides, etc., can solve the problem that microbial oil displacement cannot be realized, reduce the effect of microbial oil displacement, and destroy the physiological functions of microorganisms, etc. problem, to achieve the effect of improving the efficiency of synergistic reaction, strong operability and applicability, and expanding the swept volume

Active Publication Date: 2020-10-13
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 sulfate-bacitracin compound and composite oil displacement agent
  • Sodium dodecyl sulfate-bacitracin compound and composite oil displacement agent
  • Sodium dodecyl sulfate-bacitracin compound and composite oil displacement agent

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Effect test

Embodiment 1

[0070] This embodiment provides a kind of microbial-chemical composite oil displacement agent, and it is prepared through the following steps:

[0071] (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;

[0072] (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

[0079] This embodiment provides a kind of microbial-chemical composite oil displacement agent, and it is prepared through the following steps:

[0080] (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;

[0081] (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

[0085] This embodiment provides a kind of microbial-chemical composite oil displacement agent, and it is prepared through the following steps:

[0086] (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;

[0087] (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 dodecyl sulfate-bacitracin compound and a composite oil displacement agent. The chemical structural formula of the sodium dodecyl sulfate-bacitracin compound is shown in the specification. The invention provides a sodium dodecyl sulfate-bacitracin composite oil displacement agent containing a sodium dodecyl sulfate-bacitracin compound obtained by a reaction of sodium dodecyl sulfate and bacitracin. The compound oil-displacing 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 the effects of microbial flooding on degradation and viscosity reduction of crude oil as well as chemical flooding on emulsification and viscosity reduction, the swept volume and dispersion efficiency of the chemical oil displacement agent in an oil layer are increased in a biological carrying mode, the efficiency of a synergistic reaction ofmicroorganisms and a chemical agent is effectively improved, and the purpose that one plus one is greater than two 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 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 Applications(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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