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Acceleration method for producing organic hydrocarbon gas by thickened oil hydrocarbon anaerobic biodegradation

An anaerobic biological and organic hydrocarbon technology, applied in chemical instruments and methods, production fluids, earthwork drilling, etc., can solve the problems of less than 50% recovery rate, gasification and exploitation activators, and unavailability of utilization, etc. Achieve the effects of enrichment, accelerated production rate, and accelerated degradation

Inactive Publication Date: 2014-07-16
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] my country has huge reserves of heavy oil / ultra-heavy oil resources, but the recovery rate is less than 50%, and a large amount of resources remain underground and cannot be utilized. How to develop these resources efficiently and deeply has become an urgent problem in the field of petroleum development.
[0005] At present, there is no relevant report on heavy oil / super heavy oil gasification recovery activator, and the present invention does not simply use methane production as the activation target product

Method used

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  • Acceleration method for producing organic hydrocarbon gas by thickened oil hydrocarbon anaerobic biodegradation
  • Acceleration method for producing organic hydrocarbon gas by thickened oil hydrocarbon anaerobic biodegradation
  • Acceleration method for producing organic hydrocarbon gas by thickened oil hydrocarbon anaerobic biodegradation

Examples

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Embodiment 1

[0044] Example 1: The heavy oil well produced fluid in a certain block of Shengli Oilfield is the source of bacteria, and the heavy oil produced by degrading it is found to produce hydrocarbon gas after pre-cultivation experiments, which proves that this block has a complete anaerobic degradation hydrocarbon production Gas-like endogenous microbial flora. Through atomic absorption spectroscopy detection, it is measured that the iron element in the produced water is 8.83mg / L, the cobalt element concentration is 0.0046mg / L, and the nickel element concentration is 0.0008mg / L. 2 、CoCl 2 、NiCl 2 , adjust the concentration of iron element in the degradation system to 1.1mg / L, the concentration of cobalt element to 0.86mg / L, and the concentration of nickel element to 0.10mg / L. After 270 days of cultivation, the gas produced is 241.57umol, and the gas produced without nutrient activation 18.74umol, the system of the present invention is 12.9 times the output of the original system. ...

Embodiment 2

[0045] Example 2: The heavy oil well produced fluid in a certain block of Shengli Oilfield is the source of bacteria, and the heavy oil produced by degrading it is found to produce hydrocarbon gas through pre-cultivation experiments, which proves that this block has a complete anaerobic degradation hydrocarbon production Gas-like endogenous microbial flora. Through atomic absorption spectroscopy detection, it is measured that the iron element in the produced water is 8.83mg / L, the cobalt element concentration is 0.0046mg / L, and the nickel element concentration is 0.0008mg / L. 4 , Co(NO 3 ) 2 、NiSO 4 , adjust the concentration of iron element in the degradation system to 1.1mg / L, the concentration of cobalt element to 0.86mg / L, and the concentration of nickel element to 0.10mg / L. After 270 days of cultivation, the gas produced is 220.7umol, and the gas produced without nutrient activation 18.74umol, the system of the present invention is 11.8 times the output of the original ...

Embodiment 3

[0046] Example 3: The produced fluid of a heavy oil well in a certain block of Karamay Oilfield in Xinjiang is the source of bacteria to degrade the produced heavy oil. After pre-cultivation experiments, it was found that hydrocarbon gas was produced, which proved that this block has complete anaerobic degradation products. Endogenous microbial flora of hydrocarbon gases. Through atomic absorption spectrometry detection, it is measured that the iron element in the produced water is 0.2mg / L, the cobalt element concentration is 0.0097mg / L, and the nickel element is not detected. Dosing Fe (NO 3 ) 2 、CoBr 2 、NiSO 4 Adjust the concentration of iron element in the degradation system to 0.8mg / L, the concentration of cobalt element to 0.6mg / L, and the concentration of nickel element to 0.07mg / L. After 270 days of cultivation, the gas production is 196.54umol, while the gas production without nutrient activation is 19.93 umol, the system of the present invention is 9.86 times the o...

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Abstract

The invention relates to an acceleration method for producing organic hydrocarbon gas by thickened oil hydrocarbon anaerobic biodegradation. The method includes performing pre-culture for producing the organic hydrocarbon gas by thickened oil hydrocarbon anaerobic biodegradation; detecting the concentrations of iron, cobalt and nickel elements in water extracted from an oil reservoir; adding ferrous element, cobaltous element and nickelous element into the thickened oil hydrocarbon anaerobic biodegradation system, and allowing the concentrations of the iron, cobalt and nickel elements to be 0.8-1.2mg / L, 0.6-1.0mg / L and 0.09-0.13mg / L; obtaining the organic hydrocarbon gas. According to the acceleration method, thickened oil / super thickened oil reservoirs, capable of producing the organic hydrocarbon gas completely, formed by microbial communities are concerned, additional exogenous microbes are omitted, oil reservoir indigenous microbes are utilized completely, cost is reduced, the metabolism velocity of the microbes is increased by adding essential trace elements in the system for microbial metabolism, the microbes are enriched in a short period, accordingly degradation of the thickened oil hydrocarbon is accelerated, and organic hydrocarbon gas production rate is increased.

Description

technical field [0001] The invention relates to the technical field of gasification and exploitation of heavy oil / ultra-heavy oil reservoirs, in particular to a method for converting difficult-to-exploit oil reservoirs such as heavy oil / ultra-heavy oil into organic hydrocarbon gas by microorganisms in the reservoir. Background technique [0002] my country has huge reserves of heavy oil / ultra-heavy oil resources, but the recovery rate is less than 50%, and a large amount of resources remain underground and cannot be utilized. How to develop these resources efficiently and deeply has become an urgent problem in the field of oil development. Biogasification of residual oil in reservoirs is a forward-looking subject, which has attracted the attention and attention of developed countries such as the United States. [0003] Reservoir microbial gasification technology is a new technology that is being explored internationally in recent years to extend the life of reservoir develop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/22C09K8/58
Inventor 赵东风刘春爽张强胡恒宇刘其友
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)