Method for improving crude oil recovery ratio by utilization of industrial sewage and waste gas

A technology for industrial waste water and industrial waste gas, which is applied in the fields of fluid extraction, earth-moving drilling, wellbore/well components, etc. The effect of low investment and low cost

Inactive Publication Date: 2009-08-12
RES INST OF PETROLEUM ENG SHENGLI OIL FIELD SINOPEC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional sewage and waste gas treatment has disadvantages or deficiencies such as huge equipment, complicated procedures, large floor space, high cost, and unsatisfactory results.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The steps are:

[0021] A. Pretreatment of industrial wastewater, removing larger particulate matter and adjusting pH=6.0

[0022] B, industrial waste water after pretreatment and activator, fermented bacteria liquid are equal to the ratio of 100000:10:1 of industrial waste water than activator than fermented bacteria liquid, with 5m 3 The displacement per hour is lower than the fracture pressure of the oil layer and the industrial waste gas is 0.5×10 3 N m 3 The displacement per hour is injected into the formation together with the injection water of the oil well;

[0023] C. Long-term continuous injection into the formation with oil well injection water in any proportion, and microbial fermentation reaction in the formation to generate metabolites that are conducive to improving oil recovery in the formation, such as: biosurfactant, CO 2 、H 2 .

[0024] The cell content of the fermented bacteria liquid is 10 8 individual / mL. The activator is a mixture of 80:3:1...

Embodiment 2

[0026] The steps are:

[0027] A. Pretreatment of industrial wastewater, removing larger particulate matter and adjusting pH=8.0;

[0028] B, industrial waste water after pretreatment and activator, fermented bacteria liquid are equal to the ratio of 100000:50:4 with industrial waste water ratio activator than fermented bacteria liquid, with 50m 3 The displacement per hour is lower than the fracture pressure of the oil layer and the industrial waste gas is 8×10 3 N m 3 The displacement per hour is injected into the formation together with the injection water of the oil well;

[0029] C. Long-term continuous injection into the formation with oil well injection water in any proportion, and microbial fermentation reaction in the formation to generate metabolites that are conducive to improving oil recovery in the formation, such as: biosurfactant, CO 2 、H 2 .

[0030] The cell content of the fermented bacteria liquid is 10 9 individual / mL. The activator is a 90:4:1 mixture...

Embodiment 3

[0032] The steps are:

[0033] A. Pretreatment of industrial wastewater, removing larger particulate matter and adjusting pH=8.0;

[0034] B, industrial waste water after pretreatment and activator, fermented bacterial liquid are equal to the ratio of 100000:100:5 of industrial waste water than activator than fermented bacterial liquid, with 100m 3 The displacement per hour is lower than the fracture pressure of the oil layer and the industrial waste gas is 10×10 3 N m 3 The displacement per hour is injected into the formation together with the injection water of the oil well;

[0035] C. Long-term continuous injection into the formation with oil well injection water in any proportion, and microbial fermentation reaction in the formation to generate metabolites that are conducive to improving oil recovery in the formation, such as: biosurfactant, CO 2 、H 2 .

[0036] The cell content of the fermented bacteria liquid is 10 9 individual / mL. The activator is a 100:5:1 mixt...

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PUM

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Abstract

The invention relates to a method for improving the extraction rate of crude oil by using industrial waste water and industrial waste gas. The method comprises the following steps: injecting the industrial waste water containing carbohydrates and the industrial waste gas containing carbon dioxide into an oil layer, carrying out fermentation reaction in the oil layer environment, and generating metabolites, such as a biosurfactant, CO2, H2 and the like. The method comprises the following steps: A, preprocessing the industrial waste water to remove larger particulate matters and adjust pH to be equal between 6.0 to 9.0; B. making the proportion of the preprocessed industrial waste water to an activating agent to a zymogen liquid be 100,000:10 to 100:1 to 5, and synchronously injecting the industrial waste water, the industrial waste gas and oil well injecting water into stratum by the industrial waste water delivery capacity of 5 to 100m/h and the industrial waste gas delivery capacity of 0.5 to 10 x 10Nm /h at a pressure of less than the oil failure pressure; and C, continuously injecting the industrial waste water, the industrial waste gas and the oil well injecting water into the stratum at any proportion for a long time, carrying out the microorganism fermentation reaction in the stratum, and generating the metabolites which are favorable for improving the extraction rate of the stratum crude oil. The method can be widely used in the petroleum exploitation process.

Description

1. Technical field [0001] The invention relates to a method for increasing oil recovery in oil exploitation, in particular to a method for improving oil recovery by using industrial waste water and industrial waste gas. 2. Background technology [0002] At present, the discharge of industrial wastewater and waste gas is increasing day by day, and the CO contained in it 2 The greenhouse effect on the earth is more obvious. Traditional sewage and waste gas treatment has disadvantages or deficiencies such as huge equipment, complicated procedures, large floor area, high cost, and unsatisfactory results. 3. Contents of the invention [0003] The purpose of the present invention is to provide a method of turning waste into treasure, making full use of industrial waste water and industrial waste gas to improve oil recovery in oilfields, and adopting the method of injecting water simultaneously with water injection wells, which can effectively overcome the existing problems in t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/00E21B43/25
Inventor 汪卫东李彩风李希明宋永亭蒋焱宋智勇曹功泽王静徐登霆高光军郭辽原
Owner RES INST OF PETROLEUM ENG SHENGLI OIL FIELD SINOPEC
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