In-situ microbial oxygen generation and hydrocarbon conversion in a hydrocarbon containing formation

a hydrocarbon containing, in-situ oxygen technology, applied in the direction of fermentation, fluid removal, borehole/well accessories, etc., can solve the problems of hampered utilization of microorganisms to enhance hydrocarbon recovery, and achieve enhanced hydrocarbon recovery, improved quality, and enhanced bioavailability and biodegradability

a hydrocarbon containing, in-situ oxygen technology, applied in the direction of fermentation, fluid removal, borehole/well accessories, etc., can solve the problems of hampered utilization of microorganisms to enhance hydrocarbon recovery, and achieve enhanced hydrocarbon recovery, improved quality, and enhanced bioavailability and biodegradability

US20120255726A1Inactive Publication Date: 2012-10-11SHELL OIL CO
4 Cites 3 Cited by

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • In-situ microbial oxygen generation and hydrocarbon conversion in a hydrocarbon containing formation

Examples

Experimental program
Comparison scheme
Effect test

example

[0050]A suitable embodiment of the method according to the invention, comprises the following steps:

a) Screening whether a target underground crude oil and / or natural gas containing reservoir formation has features, such as temperature, salinity, heterogeneity, oil characteristics, micro-organisms, volatile fatty acids, hydrogen ions, acetate, propionate or butyrate and / or other potential electron donors, etc., which allow use of the method according to the invention;

b) Analyzing the composition of the water, oil and / or natural gas in the formation, for example by screening a sample taken from the formation;

c) Identification of potentially interesting micro-organisms with molecular DNA technologies using either general (16S rRNA-related) primer sets or enzyme / functional group specific primer sets (nitrate / nitrite-reductase, (per)chlorate reductases, chlorite dismutase, or hydrocarbon (alkane) degrading enzymes or using metagenomics;

d) Isolation of potentially interesting indigenous ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A method for in-situ microbial oxygen generation in an underground hydrocarbon containing formation comprises: injecting into the formation an oxygen generating composition comprising thermophilic chlorate reducing micro-organisms, such as bacteria of the genus Archaeoglobus, Geobacillus and / or Thermus, which multiply at a temperature of at least 60° C.; and inducing the multiplied micro-organisms to convert the hydrocarbons and / or other pore fluid components in-situ into transportable or disposable products

Description

BACKGROUND OF THE INVENTION[0001]The invention relates to a method for in-situ oxygen generation in a hydrocarbon containing formation.[0002]Such a method is known from U.S. Pat. No. 5,163,510.The method known from this prior art reference comprises:[0003]injecting into the formation a fluid comprising a source of oxygen that chemically releases oxygen into the formation;[0004]inducing micro-organisms present in the formation to multiply using the oil as their carbon source and the chemically produced oxygen in the injection water as their oxygen source; and[0005]allowing the multiplied micro-organisms to convert oil from the environment.[0006]In this known method the source of oxygen is provided by injecting water comprising an oxidizing compound selected from the group consisting of H2O2, NaClO3, KClO4, NaNO3 and combinations thereof, which are assumed to be chemically converted to result in oxygen. This assumption is based on the fact that oxygen generation from Microbial Chlorat...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
11 Oct 2012
Publication
US20120255726A1
IPC
E21B43/22
CPC
C09K8/582; C12P3/00; C12P1/04; C09K8/592; C09K8/60
Inventors
LOMANS, BARTHOLOMEUS PETRUS