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Oil well single well injection oil extraction method by using sugar industrial wastewater

A technology for industrial wastewater and oil wells, which is applied in wellbore/well components, mining fluids, earthwork drilling, etc., can solve the problems of high cost of wastewater treatment in the sugar industry, environmental pollution, etc., and is conducive to popularization and application, investment Less, reduce the effect of oil-water mobility ratio

Inactive Publication Date: 2017-03-22
YANTAI ZHIBEN INTPROP OPERATIONS MANAGEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to address the deficiencies of the prior art in treating sugar industry wastewater, and provide a method of turning waste into wealth, making full use of nutrients (carbon, nitrogen, phosphorus and trace elements) in the sugar industry wastewater to activate fermentation bacteria, Using the comprehensive effect of fermentation bacteria and their metabolites to increase the production of oil wells, this method effectively reduces the cost of oil well exploitation; at the same time, it solves the problems of high cost of wastewater treatment in the sugar industry and environmental pollution caused by discharge.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Test well F 23 General situation: Oil well temperature is 72°C, pressure is 11.2MPa, formation water salinity is 3562mg / L, permeability is 680×10 -3 μm 2, crude oil viscosity 856mPa.s, oil-water well spacing 250m, oil well layer thickness 2.5m, oil saturation 26.3%, porosity 0.335, oil well daily fluid production 45m 3 / d, with a water content of 96.2%. The sugar industry wastewater discharged by a sugar factory has a pH value of 4.8. Utilize the method of the present invention to carry out the single well huff and puff treatment of oil well, concrete implementation steps are as follows:

[0045] (1) Pre-treatment of sugar industry wastewater

[0046] The sugar refining industrial wastewater is filtered to separate suspended solids with a particle size larger than 50 μm, and the pH of the filtered wastewater is adjusted to 7.5 by using potassium hydroxide to obtain the pre-treated sugar refining industrial wastewater.

[0047] (2) Screening of test wells

[0048] ...

Embodiment 2

[0063] Test well G 15 General situation: Oil well temperature is 60℃, pressure is 13.3MPa, formation water salinity is 6583mg / L, permeability is 950×10 -3 μm 2 , crude oil viscosity 1568mPa.s, oil-water well spacing 180m, oil well layer thickness 5.2m, oil saturation 31.2%, porosity 0.312, oil well daily fluid production 69m 3 / d, water content 95.3%. The sugar industrial wastewater discharged by a sugar factory has a pH value of 4.6. Utilize the method of the present invention to carry out the single well huff and puff treatment of oil well, concrete implementation steps are:

[0064] (1) Pre-treatment of sugar industry wastewater

[0065] The sugar refining industrial wastewater is filtered to separate suspended solids with a particle size larger than 50 μm, and the pH of the filtered wastewater is adjusted to 6.8 by using sodium hydroxide to obtain the pre-treated sugar refining industrial wastewater.

[0066] (2) Screening of test wells

[0067] The temperature of th...

Embodiment 3

[0082] Test well G 23 General situation: Oil well temperature is 78℃, pressure is 14.3MPa, formation water salinity is 17520mg / L, permeability is 1250×10 -3 μm 2 , crude oil viscosity 1256mPa.s, oil-water well spacing 120m, oil well layer thickness 4.0m, oil saturation 28.7%, porosity 0.325, oil well daily fluid production 72m 3 / d, water content 95.6%. The sugar industry wastewater discharged by a sugar factory has a pH value of 4.5. Utilize the method of the present invention to carry out the single well huff and puff treatment of oil well, concrete implementation steps are:

[0083] (1) Pre-treatment of sugar industry wastewater

[0084] The sugar refining industrial wastewater is filtered to separate suspended solids with a particle size greater than 50 μm, and the pH of the filtered wastewater is adjusted to 6.5 by using potassium hydroxide to obtain the pre-treated sugar industrial wastewater.

[0085] (2) Screening of test wells

[0086] The temperature of the test...

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Abstract

The invention discloses an oil well single well injection oil extraction method by using sugar industrial wastewater. The method includes the following steps: performing earlier stage processing on sugar industrial wastewater to acquire the sugar industrial wastewater having the pH of 6.5-7.5 after earlier stage processing; screening a test oil well; measuring the total organic carbon, the total nitrogen and the total phosphorus of the sugar industrial wastewater after earlier stage processing; performing secondary processing on the sugar industrial wastewater after earlier stage processing to acquire the pre-processed sugar industrial wastewater; determining on-site injection technological parameters, wherein the on-site injection technological parameters includes the injection amount of the sugar industrial wastewater, the zymophyte liquid and air, the shut-in cultivation time; and performing on-site test. The method is simple in construction technology, is little in investment, is low in cost, can avoid the problem that the emission of the sugar industrial wastewater can cause environment pollution and the processing cost is high, and can be applied to processing of the sugar industrial wastewater.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a method for single-well huff and puff oil production by using sugar-making industrial wastewater. Background technique [0002] Sugar industry wastewater is wastewater discharged from sugar beet or sugarcane as raw material. It mainly comes from the sugar production process and the comprehensive utilization process of sugar by-products. Sugar industrial wastewater generally contains organic matter and sugar, high COD and BOD, low pH value (about 4.5), deep wastewater color, high nitrogen, phosphorus, potassium and other elements, which mainly come from chute wastewater, sugar extraction Waste water, distillation waste water, ground flushing water, etc. Produce 0.2-21m of waste water per ton of sugar 3 , about 2.5m per ton of sugar beet wastewater 3 . [0003] The treatment of sugar industry wastewater should firstly be cleaned and diverted. The high-con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/22C12N1/20
CPCE21B43/16C12N1/20
Inventor 赵世芬
Owner YANTAI ZHIBEN INTPROP OPERATIONS MANAGEMENT CO LTD
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