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Method for increasing crude oil recovery ratio by using distillery wastewater

A recovery and waste water technology, applied in the direction of mining fluid, earthwork drilling, wellbore/well parts, etc., can solve the problems of high cost and pollution of distiller's waste water treatment, achieve good field test effect, low investment cost, and easy operation easy effect

Inactive Publication Date: 2018-04-20
YANTAI SMITHDE ELECTROMECHANICAL EQUIP MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention solves the problems of high processing cost of distiller's grain wastewater and environmental pollution caused by discharge; at the same time, the invention has the advantages of simple treatment process, low investment cost and good field test effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A method of utilizing distiller's grain wastewater to enhance oil recovery, said method comprising the following steps:

[0023] (1) Pretreatment of distiller's grain wastewater

[0024] The solid particles in the distiller's grain wastewater are removed by filtering, and the pH is adjusted to 6.5 to obtain the pretreated distiller's grain wastewater.

[0025] (2) On-site injection stage of distiller's grain wastewater

[0026] Use the high-pressure plunger pump to inject the pretreated distiller's grain wastewater from the water injection well of the oil reservoir, and use the nutrients in the distiller's grain wastewater to activate the hydrocarbon oxidizing bacteria, surfactant-producing bacteria and gas-producing bacteria in the oil reservoir, hydrocarbons The degradation of crude oil by oxidative bacteria reduces the viscosity of crude oil, and the biosurfactant produced reduces the interfacial tension of oil and water in the oil well oil layer, reduces the oil-wa...

Embodiment 2

[0033] A method of utilizing distiller's grain wastewater to enhance oil recovery, said method comprising the following steps:

[0034] (1) Pretreatment of distiller's grain wastewater

[0035] The solid particles in the distiller's grain wastewater are removed by filtering, and the pH is adjusted to 6.5 to obtain the pretreated distiller's grain wastewater.

[0036] (2) On-site injection stage of distiller's grain wastewater

[0037] Use the high-pressure plunger pump to inject the pretreated distiller's grain wastewater from the water injection well of the oil reservoir, and use the nutrients in the distiller's grain wastewater to activate the hydrocarbon oxidizing bacteria, surfactant-producing bacteria and gas-producing bacteria in the oil reservoir, hydrocarbons The degradation of crude oil by oxidative bacteria reduces the viscosity of crude oil, and the biosurfactant produced reduces the interfacial tension of oil and water in the oil well oil layer, reduces the oil-wa...

Embodiment 3

[0044] A method of utilizing distiller's grain wastewater to enhance oil recovery, said method comprising the following steps:

[0045] (1) Pretreatment of distiller's grain wastewater

[0046] The solid particles in the distiller's grain wastewater are removed by filtering, and the pH is adjusted to 7.0 to obtain the pretreated distiller's grain wastewater.

[0047] (2) On-site injection stage of distiller's grain wastewater

[0048] Use the high-pressure plunger pump to inject the pretreated distiller's grain wastewater from the water injection well of the oil reservoir, and use the nutrients in the distiller's grain wastewater to activate the hydrocarbon oxidizing bacteria, surfactant-producing bacteria and gas-producing bacteria in the oil reservoir, hydrocarbons The degradation of crude oil by oxidative bacteria reduces the viscosity of crude oil, and the biosurfactant produced reduces the interfacial tension of oil and water in the oil well oil layer, reduces the oil-wa...

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Abstract

The invention belongs to the technical field of sewage treatment, and particularly relates to a method for increasing the crude oil recovery ratio by using distillery wastewater. The method comprisesthe following steps of pretreatment of the distillery wastewater, an on-site injection stage of the distillery wastewater and an on-site test effect evaluation stage. According to the method for improving the crude oil recovery ratio by using the distillery wastewater, the problem of the high treatment cost and environmental pollution caused by discharging of the distillery wastewater is solved; and meanwhile, the method has the advantages of being simple in treatment method, simple in operation, less in investment, low in cost and good in on-site effect, the period of validity of an on-site test is 5 years or above, the input-output ratio is greater than 1:8, and the recovery ratio is increased by 12% or above. Therefore, the method can be widely used in the on-site test of increasing theoil reservoir recovery ratio.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a method for improving crude oil recovery by utilizing distiller's grain wastewater. Background technique [0002] Distiller's grain wastewater is a kind of organic wastewater with high concentration, high temperature and high suspended solids. The wastewater mainly contains residual starch, crude protein, cellulose, various inorganic salts and mycoprotein. [0003] According to statistics, the distiller's lees wastewater generated by the annual production of liquor in our country reaches tens of millions of tons. Therefore, the comprehensive utilization of distiller's grain wastewater is of great significance to the resource development and environmental protection of our country. [0004] At present, the vast majority of alcohol production enterprises carry out anaerobic-aerobic biological treatment of distiller's grain wastewater, but it is only a simple ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/22
CPCE21B43/16
Inventor 朱林
Owner YANTAI SMITHDE ELECTROMECHANICAL EQUIP MFG
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