WO1997047708A1 - Method of inhibiting reservoir souring by bacteria - Google Patents
Method of inhibiting reservoir souring by bacteria Download PDFInfo
- Publication number
- WO1997047708A1 WO1997047708A1 PCT/GB1997/001537 GB9701537W WO9747708A1 WO 1997047708 A1 WO1997047708 A1 WO 1997047708A1 GB 9701537 W GB9701537 W GB 9701537W WO 9747708 A1 WO9747708 A1 WO 9747708A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- peroxide
- reservoir
- peroxy compound
- peroxy
- bacteria
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/605—Compositions for stimulating production by acting on the underground formation containing biocides
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N37/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids
- A01N37/16—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids containing the group; Thio analogues thereof
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N59/00—Biocides, pest repellants or attractants, or plant growth regulators containing elements or inorganic compounds
Definitions
- the present invention relates to a method of reducing the souring of hydrocarbons due to bacterial production of hydrogen sulphide gas.
- hydrocarbon fluids such as oil or gas
- the source water used in such flooding operations is frequently a natural brine and in the case of offshore oil and gas production is normally sea water.
- Bacteria within the brine flood water are introduced to the reservoir and find a hydrocarbon source (for example, oil) .
- the oil may then be metabolised by the bacteria allowing the rapid growth of bacterial populations.
- Bacteria which may be naturally present in the reservoir in dormant form will receive a nutrient supply due to the introduction of the flood water. Again, the increased nutrient supply will promote bacterial growth within the reservoir.
- SRBs sulphate reducing bacteria
- the hydrogen sulphide generated will become partitioned in both the oil/gas and water phases within the reservoir. More importantly, however, the hydrogen sulphide would normally be co-produced in the fluids at the producing well.
- Hydrogen sulphide is highly undesirable in the produced fluids since it is corrosive and toxic. Consequently, the presence of hydrogen sulphide as a contaminant adversely affects the sales quality of the exported oil and gas. It is thus normal practice within the industry to attempt to prevent bacterial growth within the reservoir by the addition of biocides to the injected water in order to sterilise the system and therefore prevent proliferation of bacteria.
- Typical biocides include chlorine, aldehydes such as gluteraldehde, thiazolines and quaternary amines.
- biocides are readily absorbed to the surfaces of minerals such as clays found in reservoir sands. It is therefore not normally possible to achieve penetration of the biocide deep into a reservoir.
- One way to obtain an end product having acceptably low levels of hydrogen sulphide is the removal of that gas by treating the extracted hydrocarbons. This will normally require the installation of process equipment to remove the hydrogen sulphide gas by, for example, flaring, treating with amine scrubbers to absorb the gas or addition of chemicals to scavenge by reaction to produce a neutralised compound.
- peroxy compounds which are not normally thought of as biocides
- the peroxy compounds can both destroy resident bacteria and also act to remove hydrogen sulphide already generated.
- the present invention provides a method of inhibiting the growth of bacteria in a hydrocarbon reservoir, said method comprising introducing a peroxy compound to said reservoir.
- the present invention provides a method of combatting the generation of hydrogen sulphide in a hydrocarbon reservoir by sulphur reducing bacteria, said method comprising introducing a peroxy compound to said reservoir.
- the complementary actions of the peroxy compounds arise from the oxidising potential of such compounds and the generation of free radicals as the peroxy compound decomposes .
- the peroxy compounds for use in the present invention are normally stable neutral compounds which therefore show minimal absorption to the reservoir minerals and can therefore penetrate deep into the reservoir carried by the flood water.
- the peroxy compounds of interest may be selected to decompose at the particular temperatures encountered within the reservoir (usually elevated temperatures relative to the ambient) .
- Particular activation temperatures can be engineered by selection and/or modifications of the peroxy compounds used, to allow the selective placement of compounds within reservoirs of widely differing temperatures.
- the peroxy compounds therefore have the advantages of being selective to the destruction of bacteria without being lost to the reservoir by absorption or decomposition prior to deep penetration.
- the peroxy compounds also remove encountered hydrogen sulphide to prevent continued production within the recovered fluids.
- peroxy compounds useful for this invention contain the chemical grouping -0-0- and may be generally described by the formula:
- R and R' may be hydrogen, alkyl or aromatic groups (including substituted cyclic and branched groups), oxygenated hydrocarbon chains such as carbonate or ketone, or other groups which will result in stabilisation of the peroxide linkage.
- R and R' alter the solubility characteristics and thermal stabilities of the peroxides which allows for selective placement and activation in reservoirs of differing temperatures and can also allow penetration of oil layers by selection of oleophilic peroxides should this be desirable.
- the generated free radicals may undergo various reactions leading to complex organic products but all such reactions lead to cellular attack and therefore have biocidal properties.
- HS reactive thiol free radical
- a further decomposition reaction can lead to the formation of free oxygen which again limits bacterial activity by altering the oxygen free conditions necessary for SRB growth.
- the described peroxy compounds therefore provide advantageous multifunctional behaviour which can prevent reservoir souring.
- the present invention provides the use of a peroxy compound to inhibit bacterial growth within a hydrocarbon reservoir or to reduce the hydrogen sulphide content of a hydrocarbon fluid.
- the present invention also provides a hydrocarbon fluid (eg oil or gas) containing a peroxy compound or a reactant thereof as an additive.
- a hydrocarbon fluid eg oil or gas
- the range of useful peroxy compounds to be applied to a reservoir may be characterised by a self accelerating decomposition temperature (SADT) where a critical value will cause the compound to decompose at an accelerating rate yielding the free radicals necessary for biocidal activity.
- SADT self accelerating decomposition temperature
- the value may be adjusted by the inclusion of accelerators or inhibitors which allow a peroxy compound to be utilised at temperatures above or below this figure.
- Suitable peroxy compounds which may be added to a reservoir flood water for the purpose of the invention include, but are not limited to:
- Methyl ethyl ketone peroxide Cyclohexanone peroxide, Acetyl acetone peroxide, Diacetone alcohol peroxide, Dibenzoyl peroxide, Ditertiary butyl peroxide, Tertiary butyl peroxide, Hydrogen peroxide, Tertiary butyl peroxy benzoate, Inorganic and organic peroxycarbonates, or
- the peroxy compounds will be added to the flood water prior to injection into the reservoir.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Dentistry (AREA)
- Environmental Sciences (AREA)
- Plant Pathology (AREA)
- Health & Medical Sciences (AREA)
- Pest Control & Pesticides (AREA)
- Agronomy & Crop Science (AREA)
- General Health & Medical Sciences (AREA)
- Wood Science & Technology (AREA)
- Zoology (AREA)
- Inorganic Chemistry (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU30399/97A AU3039997A (en) | 1996-06-08 | 1997-06-09 | Method of inhibiting reservoir souring by bacteria |
EP97925164A EP0902821A1 (en) | 1996-06-08 | 1997-06-09 | Method of inhibiting reservoir souring by bacteria |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9612035.7 | 1996-06-08 | ||
GBGB9612035.7A GB9612035D0 (en) | 1996-06-08 | 1996-06-08 | Method of inhibiting reservoir souring by bacteria |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1997047708A1 true WO1997047708A1 (en) | 1997-12-18 |
Family
ID=10794997
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB1997/001537 WO1997047708A1 (en) | 1996-06-08 | 1997-06-09 | Method of inhibiting reservoir souring by bacteria |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0902821A1 (en) |
AU (1) | AU3039997A (en) |
GB (1) | GB9612035D0 (en) |
WO (1) | WO1997047708A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006523657A (en) * | 2003-04-16 | 2006-10-19 | ネオケミカル デザロージョス アバンサードス,ソシエダ アノニマ | Biocides: Use of dialkyl ketone peroxides as fungicides, preservatives, disinfectants and anthelmintics |
AU2011249487B2 (en) * | 2010-05-06 | 2014-10-02 | Novartis Ag | Organic peroxide compounds for microorganism inactivation |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0082513A1 (en) * | 1981-12-23 | 1983-06-29 | Peroxid-Chemie GmbH | Process for eliminating H2S from natural gas, crude oil and their mixtures |
-
1996
- 1996-06-08 GB GBGB9612035.7A patent/GB9612035D0/en active Pending
-
1997
- 1997-06-09 WO PCT/GB1997/001537 patent/WO1997047708A1/en not_active Application Discontinuation
- 1997-06-09 EP EP97925164A patent/EP0902821A1/en not_active Withdrawn
- 1997-06-09 AU AU30399/97A patent/AU3039997A/en not_active Abandoned
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0082513A1 (en) * | 1981-12-23 | 1983-06-29 | Peroxid-Chemie GmbH | Process for eliminating H2S from natural gas, crude oil and their mixtures |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006523657A (en) * | 2003-04-16 | 2006-10-19 | ネオケミカル デザロージョス アバンサードス,ソシエダ アノニマ | Biocides: Use of dialkyl ketone peroxides as fungicides, preservatives, disinfectants and anthelmintics |
JP2011246473A (en) * | 2003-04-16 | 2011-12-08 | Neochemical Desarrollos Avanzados Sa | Use of dialkylketone peroxide as biocidal, sterilizing, antiseptic, disinfecting and anti-parasitic agent |
AU2011249487B2 (en) * | 2010-05-06 | 2014-10-02 | Novartis Ag | Organic peroxide compounds for microorganism inactivation |
AU2011249487C1 (en) * | 2010-05-06 | 2015-05-14 | Novartis Ag | Organic peroxide compounds for microorganism inactivation |
Also Published As
Publication number | Publication date |
---|---|
AU3039997A (en) | 1998-01-07 |
GB9612035D0 (en) | 1996-08-07 |
EP0902821A1 (en) | 1999-03-24 |
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