CN1920004A - Microorganism for controlling harm of oil field sulfate reductive bacterium and application thereof - Google Patents
Microorganism for controlling harm of oil field sulfate reductive bacterium and application thereof Download PDFInfo
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- CN1920004A CN1920004A CN 200610047730 CN200610047730A CN1920004A CN 1920004 A CN1920004 A CN 1920004A CN 200610047730 CN200610047730 CN 200610047730 CN 200610047730 A CN200610047730 A CN 200610047730A CN 1920004 A CN1920004 A CN 1920004A
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Abstract
The invention relates the microorganism agent used to control oil field sulfate-reducing bacteria and its application. The invention can used to control oil field secondary depletion sulfate-reducing bacteria and microorganism. The water outlet system of secondary depletion technology comprises sulfate-reducing bacteria, H2S and sulphide, which can cause corrosion and pollution of sulphide. Microorganism agent comprises denitrifying bacteria culture, nutrescin and synergic nutrescin. 0.01-1wt% denitrifying bacteria culture, 5-100g/L culture and 10-200ppm synergic nutrescin. Microorganism agent can avoid SRB growing, SRB producing H2S, and removing sulphide. At the same time, metabolite can improve recovery efficiency.
Description
Technical field
The invention belongs to the microbial preparation field, be specially a kind of microbial preparation and application thereof of controlling oil field sulfate reductive bacterium harm, for being applicable to control oil field secondary oil recovery sulphate reducing bacteria (SRB) quantity and active microbiological manipulation technology.
Background technology
In petroleum industry, ground that is caused by microorganism and underground installation corrosion and sulphide staining problem are very serious, have caused problems such as serious economy, environment and safety in production.A large amount of breedings of sulphate reducing bacteria are the major causes that causes this harm in the waterflood system.At present, the sulphate reducing bacteria (SRB) that oil field secondary oil recovery technology recovered water system contains can produce a large amount of H
2S and sulfide cause corrosion and sulphide staining.The main means of oil field control sulphate reducing bacteria are to add a large amount of chemical bactericides, not only can not tackle the problem at its root, and expense are very high and cause serious environmental to pollute.
Summary of the invention
The purpose of this invention is to provide a kind of microbial preparation and application thereof of controlling oil field sulfate reductive bacterium harm, by changing the waterflood system biological community structure, the quantity and the activity that suppress sulphate reducing bacteria, thus corrosion and the sulfide harm that causes because of sulphate reducing bacteria reduced.
Technical scheme of the present invention is:
A kind of microbial preparation of controlling oil field sulfate reductive bacterium harm, its composition and content are as follows:
Denitrifying bacteria culture: 0.1-10 weight part;
Nutritive element: nitrate, nitrite or phosphoric acid salt, (5-100) * 10
-3Weight part;
Collaborative nutritive element: specificity sulphate reducing bacteria inhibition, (1-200) * 10
-6Weight part;
Wherein, consisting of of described denitrifying bacteria culture: denitrifying bacteria 1 * 10
6～8 * 10
9Individual bacterium/mL, water: surplus.
The microbial preparation of described control oil field sulfate reductive bacterium harm, described denitrifying bacteria is pseudomonas putida (Pseudomonas putida) or thiobacillus denitrificans (Thiobacillus denitrifican) etc.
The microbial preparation of described control oil field sulfate reductive bacterium harm, for cooperating the effect of microbial preparation, need add collaborative nutritive element, collaborative nutritive element is specificity sulphate reducing bacteria (SRB) inhibitions such as molybdate or tungstate, and the specificity SRB inhibition concentration range that adds is at 1-200ppm.
The preparation method of the microbial preparation of described control oil field sulfate reductive bacterium harm, concrete steps are as follows:
At first the denitrifying bacteria culture is prepared by conventional aerobic fermentation technology in described ratio, nutritive element and inhibition are the commercially available prod, then nutritive element, collaborative nutritive element and denitrifying bacteria culture uniform mixing are formed.Perhaps, in use, add denitrifying bacteria culture, nutritive element respectively, collaborative nutritive element also can.
Denitrifying bacteria is carried out fermentation culture, and purpose is in order to obtain the denitrifying bacteria of requested number, unavoidably to understand the residual of some medium component in the denitrifying bacteria of acquisition, as, NH
4Cl:0.01-0.5g/L; MgSO
4: 0.01-0.4g/L; CaCl
2: 0-0.03g/L; MnSO
4: 0-0.02g/L; FeCl
3: 0-0.02g/L; KNO
3: 0-5.0g/L; The adding of these materials is very little or do not have effect to the water body effect, can ignore.
The application of the microbial preparation of described control oil field sulfate reductive bacterium harm, this microbial preparation adds to pending water, and the ratio that dosage accounts for treating water respectively is: denitrifying bacteria culture, 0.01-1%wt; Nutritive element, 5-100mg/L; Collaborative nutritive element, 1-200ppm.
The application of the microbial preparation of described control oil field sulfate reductive bacterium harm, this microbial preparation continous way or intermittent type add in the surface water treatment system or/and in the re-injection water system, the speed of adding that continous way adds is 10-500L/min; The speed of adding that intermittent type adds is 10-1000L/min, adds every day 1-12 hour, rests 23-12 hour (needing to determine according to correlation parameters such as oil wells in field waterflood injection rate and quantity the processing parameter that adds of microbial preparation).
The present invention designs a kind of microbial preparation, 1) profitable strain, its breeding needs the part of sulfide as food, therefore can directly consume sulfide in water; 2) add nutritive element, change the oxidation-reduction potential of system, make the generation of phylogenetic Biochemical processes, change the reduction that becomes nitrate by sulfide.The sulfide that has produced is transformed into sulphite, vitriol and sulphur; 3) growth of probiotics suppresses to repel the growth of sulphate reducing bacteria; 4) specific inhibitor, selectivity inhibition sulphate reducing bacteria.
Advantage of the present invention and beneficial effect are:
(1) eliminates biogenetic H
2S pollutes, and keeps the value of sweet oil gas;
(2) reduce Infrastructure and the anticorrosion expense of production unit;
(3) iron sulphide of eliminating reservoir and equipment stops up;
(4) improve safety production environment, ensure workers ' health;
(5) reduce cost for oil production;
(6) no longer need to produce, transport and use deleterious chemical bactericide.
In a word, the invention provides a kind of control oil field sulfate reductive bacterium corrosive microbiological manipulation technology, be used for oil field secondary oil recovery sulphate reducing bacteria quantity and active control, by in system, adding microbial preparation, make the denitrifying bacterium competition suppress the growth of SRB, stop SRB to produce H
2S, and the sulfide that has existed in the removal system, the meta-bolites (N of microorganisms
2With tensio-active agent etc.) improved the recovery ratio in oil field.
Description of drawings
Fig. 1 is H in the laboratory simulationt test bottle
2The burst size correlation curve figure of S.
Embodiment
At first, prepare the denitrifying bacteria culture, then nutritive element, collaborative nutritive element and denitrifying bacteria culture uniform mixing are formed in the aerobic fermentation technology of described ratio by routine.Perhaps, in use, add denitrifying bacteria culture, nutritive element respectively, collaborative nutritive element also can.
The composition of microbial preparation and the content in treating water are as follows:
1) the denitrifying bacteria culture is formed: pseudomonas putida 5 * 10
7Individual bacterium/mL, water surplus; Denitrifying bacteria culture addition is the 1%wt that accounts for treating water;
2) SODIUMNITRATE: 5mg/L;
3) Sodium orthomolybdate or lithium molybdate: 20ppm.
Difference from Example 1 is that the composition of microbial preparation and the content in treating water are as follows:
1) the denitrifying bacteria culture is formed: pseudomonas putida 2 * 10
8Individual bacterium/mL, water surplus; Denitrifying bacteria culture addition is 0.5%wt;
2) Sodium Nitrite: 10mg/L;
3) sodium wolframate: 10ppm.
Difference from Example 1 is that the composition of microbial preparation and the content in treating water are as follows:
1) the denitrifying bacteria culture is formed: thiobacillus denitrificans 2 * 10
8Individual bacterium/mL, water surplus; Denitrifying bacteria culture addition is 0.01%wt;
2) Sodium Nitrite and sodium phosphate: each 50mg/L;
3) sodium wolframate: 100ppm.
Microbial preparation continous way or intermittent type add in the surface water treatment system or/and in the re-injection water system, the speed of adding that continous way adds is 10-500L/min; The speed of adding that intermittent type adds is 10-1000L/min, adds every day 1-12 hour, rests 23-12 hour (needing to determine according to correlation parameters such as oil wells in field waterflood injection rate and quantity the processing parameter that adds of microbial preparation)
Mode one: surface system dynamically adds
With embodiment 1 is example, takes 24 hours continuous dosing methods, add snack made with traditional Chinese medicines and discharge water at one section, with liquid stream with one section discharge water, two sections mixing effects that discharge water, enter the effect of sewage slurry tank subsequently.First all add-ons are 30mL/L, are stabilized in 15mL/L later on.
Mode two: inject water at oil well and add
With embodiment 2 is example, annotates from annular space by concentration proportioning according to water injection rate.Adding consistency is 50mL/L, reduces gradually later on, is stabilized in 15mL/L.
Table 1
| Handle | The 2nd day | The 4th day |
| S K NA | 1×10 8 4.9×10 5 1.7×10 6 | 8.3×10 9 2.7×10 6 5.4×10 6 |
Expression is the quantity (MPN counting process) of SRB in the laboratory simulationt test bottle in the table 1, and S is contrast; The K nitrite treatments; NA nitrate is handled.
As can be seen from Table 1: after adding nitrate and nitrite, SRB quantity significantly is lower than contrast.
That represent among Fig. 1 is H in the laboratory simulationt test bottle
2The burst size of S, S is contrast; K is a nitrite treatments; NA is that nitrate is handled.
As seen from Figure 1: after adding nitrate and nitrite, H
2The S generation almost completely is suppressed.
Claims (5)
1, a kind of microbial preparation of controlling oil field sulfate reductive bacterium harm is characterized in that its composition and content are as follows:
Denitrifying bacteria culture: 0.1-10 weight part;
Nutritive element: nitrate, nitrite or phosphoric acid salt, (5-100) * 10
-3Weight part;
Collaborative nutritive element: specificity sulphate reducing bacteria inhibition, (1-200) * 10
-6Weight part;
Wherein, consisting of of denitrifying bacteria culture: denitrifying bacteria 1 * 10
6～8 * 10
9Individual bacterium/mL; Water: surplus.
2, according to the microbial preparation of the described control oil field sulfate reductive bacterium harm of claim 1, it is characterized in that: described denitrifying bacteria is pseudomonas putida or thiobacillus denitrificans etc.
3, according to the microbial preparation of the described control oil field sulfate reductive bacterium harm of claim 1, it is characterized in that: specificity sulphate reducing bacteria inhibition is molybdate or tungstate etc.
4, according to the application of the microbial preparation of the described control oil field sulfate reductive bacterium of claim 1 harm, it is characterized in that: this microbial preparation adds to pending water, the ratio that dosage accounts for treating water respectively is: denitrifying bacteria culture, 0.01-1%wt; Nutritive element, 5-100mg/L; Collaborative nutritive element, 1-200ppm.
5, according to the application of the microbial preparation of the described control oil field sulfate reductive bacterium of claim 4 harm, it is characterized in that: this microbial preparation continous way or intermittent type add in the surface water treatment system or/and in the re-injection water system, the speed of adding that continous way adds is 10-500L/min; The speed of adding that intermittent type adds is 10-1000L/min, adds every day 1-12 hour, rests 23-12 hour.
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|---|---|---|---|
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| CN100465267C CN100465267C (en) | 2009-03-04 |
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| CN101338662B (en) * | 2007-09-30 | 2013-04-10 | 盎亿泰地质微生物技术（北京）有限公司 | Method for preventing and reducing hydrogen sulfide of aqueous system and promoting oil recovery factor |
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| AU3833495A (en) * | 1994-10-20 | 1996-05-15 | Research And Development Institute, Inc. At Montana State University | Inhibition of sulfate-reducing bacteria via nitrite production |
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