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A method for enhancing oil recovery by using organic solid waste

A technology of organic solids and wastes, applied in the direction of mining fluids, earthwork drilling, boreholes/well components, etc., can solve the problems of polluting groundwater bodies, air pollution, etc., achieve environmental protection, good effect, and reduce environmental pollution.

Active Publication Date: 2015-09-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the treatment methods of organic solid waste are mainly through incineration and underground burial. Incineration will produce a large amount of toxic gases and cause air pollution. Underground burial will pollute groundwater due to the shallow burial stratum.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1, taking a certain block of Hekou Oil Production Plant of Shengli Oilfield as an example:

[0027] A certain block of the Hekou Oil Production Plant of Shengli Oilfield is a pilot test area for microbial flooding. The test area is an unconsolidated sandstone hydrophilic reservoir with medium-high permeability, high saturation, high salinity, medium-high viscosity, and fluvial deposits. The burial depth is 1173m-1230m. Reservoir temperature is 85°C. The coefficient of variation of permeability is 0.538, the porosity is 33.0%, and the formation permeability is 100×10 -3 μm 2 . The salinity of formation water is 110000mg / L. The oil-bearing area of ​​the test area is 0.86km 2 , effective thickness 10.4m, geological reserves 164.9×10 4 t. There are 14 oil wells and 8 water wells.

[0028] Utilize the method of the present invention to improve this block recovery rate, concrete implementation steps are:

[0029] (1) Pretreatment of organic solid waste, cru...

Embodiment 2

[0033] Example 2 - A certain block of Shengli Oilfield Gudao Oil Production Plant

[0034] A certain block of Gudao Oil Production Plant in Shengli Oilfield is a pilot test area for microbial flooding. The test area is a neutral oil reservoir with high permeability, high salinity, medium-high viscosity, and fluvial deposits. The burial depth is 1521m-1582m, and the reservoir temperature is 60°C. The porosity is 35.2%, and the formation permeability is 500×10 -3 μm 2 . The formation water salinity is 100000mg / L. The oil-bearing area of ​​the test area is 2.86km 2 , effective thickness 18.2m, geological reserves 254.2×10 4 t. There are 21 oil wells and 6 water wells.

[0035] Utilize the method of the present invention to improve this block recovery rate, concrete implementation steps are:

[0036] (1) Pretreatment of organic solid waste, crushing the solid waste into a solid powder with a particle size of 300 μm;

[0037] (2) After pretreatment, the mass ratio of organi...

Embodiment 3

[0040] Example 3 - A certain block of Hekou Oil Production Plant in Shengli Oilfield

[0041] A block of the Hekou Oil Production Plant of Shengli Oilfield is a pilot test area for microbial flooding. The test area is a water-loving unconsolidated sandstone reservoir with high permeability and high salinity, with a burial depth of 1362m-1435m and a reservoir temperature of 45°C. The porosity is 36.2%, and the formation permeability is 2000×10 -3 μm 2 . The salinity of formation water is 50000mg / L. The oil-bearing area of ​​the test area is 0.92km 2 , effective thickness 15.8m, geological reserves 92.3×10 4 t. There are 12 oil wells and 4 water wells.

[0042] Utilize the method of the present invention to improve this block recovery rate, concrete implementation steps are:

[0043] (1) Pretreatment of organic solid waste, crushing and processing the solid waste into a solid powder with a particle size of 500 μm;

[0044] (2) The mass ratio of organic solid waste to ino...

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PUM

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Abstract

The invention discloses a method for improving a crude oil recovery ratio by using an organic solid waste. The method comprises the following steps of: A, pretreating the organic solid waste, wherein the organic solid waste is processed into solid powder with particle diameter of 100-500 mu m; B, performing endogenous microbial oil displacement, i.e., injecting the organic solid waste, organic salt and stratum water after pretreatment into a stratum from a water injection well in a mass ratio of being equal to 8-10:1:4,000-5,000, and performing exogenous microbial oil displacement, i.e., injecting the organic solid waste, the organic salt, zymophyte liquid and the stratum water after pretreatment into the stratum from the water injection well in a mass ratio of being equal to 8-9:1:900-1,000:4,000-5,000; and C, performing microbial fermentation reaction on the organic solid waste and the inorganic salt injected into the stratum and the injected zymophyte or endogenous microorganism to generate a metabolite which is in favor of improving the crude oil recovery ratio. The method has the advantages of easiness in construction, low cost and good effect, the environmental pollution can be effectively reduced, and the method is widely applied to petroleum extraction.

Description

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 organic solid waste. Background technique [0002] Organic solid waste, such as: kitchen waste, food waste, crop waste, winery waste, flour mill waste, etc., due to its persistence and wide-area dispersion in the environment, it is harmful to water bodies and ecology. The environment has a greater impact. At present, the treatment methods of organic solid waste are mainly through incineration and underground burial. Incineration will produce a large amount of toxic gases and cause air pollution. Underground burial will pollute groundwater due to the shallow burial stratum. Contents of the invention [0003] The purpose of the present invention is to provide a method of turning waste into treasure and making full use of organic solid waste to enhance oil recovery, adopting the method of injecting water simul...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/22
Inventor 孙刚正汪卫东宋智勇郭辽原刘涛李彩风郝滨吴晓玲胡婧
Owner CHINA PETROLEUM & CHEM CORP
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