CN102425398A - Produced fluid circulating treatment method for microbial oil displacement - Google Patents
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Abstract
The invention relates to a method for circularly treating produced fluid for microbial oil displacement. The technical scheme comprises the following steps: (1) gas-liquid separation of the oil-gas-water mixture of the microbial flooding reservoir; (2) separating oil from water in the produced liquid of the microbial flooding oil reservoir; (3) treating the produced water, removing part of suspended matters and crude oil, and reducing oxygen content to reach the national A1 level standard of injected water; (4) detecting the nutrient components, microorganisms and metabolites of the produced water; (5) and judging whether the nutrition and the microorganisms reach the injection standard or not according to the detection result, if so, directly injecting, and otherwise, supplementing the nutrition or the microorganisms until the injection standard is reached and reinjecting. The invention has the beneficial effects that: the recycling of the output liquid reduces the injection of nutrient substances and exogenous microorganisms; environmental pollution is reduced, and because the produced fluid of the microbial flooding oil reservoir is effectively reinjected and is not discharged back to cause the discharge, the environmental pollution is avoided; in addition, the microbial flooding field test improves the recovery rate by 7.5 percent.
Description
Technical field:
The present invention relates to a kind of microbe oil production technical field, particularly a kind of output liquid circulation process method that is used for microbial oil displacement.
Background technology:
Microorganism is improved recovery efficiency technique (Microbial Enhanced Oil Recovery) and is meant the technology of utilizing microorganism and metabolite thereof to improve crude output and recovery ratio; Compare with other tertiary oil recovery technologies; That microbial technique has is applied widely, technology is simple, characteristics such as good in economic efficiency, pollution-free; Have a good application prospect, thereby receive increasing concern.Microbial single well wax control, microorganism huff and puff and microbial oil displacement three major types technology have been formed at present.
In the microbial oil displacement field conduct process, contain nutrition and microorganism that has been activated and metabolite thereof that part is not consumed in the produced liquid in oil well.Microbial flooding oil reservoir output liquid mixes at multi-purpose station with non-enforcement microbial flooding oil reservoir output liquid at present; Through after the water-oil separating; Most of recovered water effluxes, and has only the fraction produced-water reinjection, causes nutrition and microorganism concn in the recovered water sharply to reduce for above-mentioned reasons; Cause the waste of nutrition and microorganism, utilization rate is low.But; Through document Investigation, application number is that 200910197995.4 patents of invention " a kind of method of regulating and controlling microbial enhanced oil recovery " disclose a kind of microbe oil production method of regulating and control oil reservoir and may further comprise the steps (1) and adopt molecular biology method to analyze biological community structure and metabolite in the oil reservoir output liquid; (2) regulate the microorganism nutrition system corresponding of preparing to inject oil reservoir with this microorganism; (3) inject adjusted microorganism and nutrition system by water injection well.The advantage of this method is to inject the nutrition system targetedly; The blindness of having avoided the nutrition system to use; Shortcoming is not make full use of microorganism and nutrients in the output liquid; Recovered water effluxes and causes environment pollution on the one hand, causes microorganism field trial cost of investment high on the other hand.Also do not see at present the relevant report of related microorganism oil reservoirs extraction liquid cycling and reutilization.
Summary of the invention:
The object of the invention is exactly the above-mentioned defective that exists to prior art; A kind of output liquid circulation process method that is used for microbial oil displacement is provided; With microbial flooding oil reservoir extraction liquid through suitable processing after, with this part material reinjection into reservoir from water injection well, thereby make microorganism and nutrition be able to further utilization; Reduce microbial flooding field trial cost investment, avoided the environment pollution that causes because of wastewater disposition simultaneously effectively.
Its technical scheme is: may further comprise the steps:
(1) microbial flooding oil reservoir oil gas aqueous mixtures carries out gas-liquid separation;
(2) method that employing is heated and Gravity Separation combines is to the water-oil separating of microbial flooding oil reservoir extraction liquid;
(3) produced water treatment: remove part suspension and crude oil, reduce oxygen content, reach and inject the land that abounds in rivers and lakes A1 of man grade standard; Biochemical treatment+filtering technique is adopted in produced water treatment, and the sewage with oil after the processing is less than 1.0mg/L, and suspension content SS is less than 5.0mg/L, and oxygen content is less than 0.1mg/L;
(4) output water nutrition composition and microorganism and metabolite detect: described output water nutrition composition detection comprises the detection to carbon source, nitrogenous source and phosphorus source, and its detection method is respectively bio-sensing analytic approach, alkaline alkaline potassium per-sulfate digestion ultraviolet spectrophotometry and ammonium molybdate AAS; Described microorganism and metabolite detect: comprise little molecule acid, surface tension, little molecule acid detection method is a gas chromatography, and surface tension is tested with surface tension instrument;
(5) according to testing result, judge whether nutrition and microorganism reach the injection standard, directly inject if reach the injection standard, otherwise extra-nutrition or microorganism are until reaching the re-injection of injection standard;
(6) repeat above step.
The injection standard that microbial flooding oil reservoir in the step (5) injects the water nutrient solution is according to following mass ratio, carbon source: nitrogenous source: phosphorus source=1:0.10～0.15:0.01～0.05.
The injection standard that microbial flooding oil reservoir in the step (5) injects the water microorganism is that the SRB implantation concentration is not less than 1.0 * 10
7Individual/ml, TGB implantation concentration is not less than 2.5 * 10
7Individual/ml, HOB implantation concentration is not less than 1.1 * 10
7Individual/ml, FB implantation concentration is not less than 1.5 * 10
7Individual/ml.
Above-mentioned carbon source is made up of by 1:0.1～0.5:0.1～0.5:0.2～0.5:0.2～0.5 mass ratio technical grade glucose sugar, sugaring residue discarded object, blackstrap, stalk roughing liquid and wheat hydrolyzate, and the carbon source implantation concentration is not less than 100mg/L.
Above-mentioned nitrogenous source is made up of by 1:0.2～0.3:0.2～0.4:0.1～0.2:0.1～0.3 mass ratio ammonium nitrate, ammonium chloride, peptone, Dried Corn Steep Liquor Powder and soybean cake powder, and the absolute implantation concentration of nitrogenous source is no more than 10mg/L.
Above-mentioned phosphorus source is made up of by 1:0.8～1.0 mass ratios diammonium hydrogen phosphate and ammonium dihydrogen phosphate (ADP), and the absolute implantation concentration in phosphorus source is no more than 1mg/L.
Above-mentioned little molecule acid is meant formic acid, acetate, propionic acid and butyric acid.
The present invention compared with prior art, its beneficial effect is following:
(1) applied widely, this method is not only applicable to the low-temperature reservoir microbial flooding, high-temperature oil reservoir microbial flooding in being equally applicable to.Be not only applicable to the low-permeability oil pool microbial flooding, be applicable to that also middle and high infiltration passes through the rate oil pool microorganisms and drives.It is different that difference is that different oil reservoir types is injected water quality standard, and injecting nutrient solution and microbial biomass has difference.
(2) cost of investment is low; Owing to contain a large amount of in the microbial flooding oil reservoir output liquid not by microbial consumption nutrition, the microorganism of having activated and metabolite; Therefore the recycle of output liquid has reduced the injection of nutriment and inoculating microbe; Therefore reduced cost investment effectively, each test about cost of the block Spring Festival holidays is no less than 2,500,000 yuan.
(3) reduced environment pollution,, do not returned to cause to efflux, therefore can not cause environment pollution owing to microbial flooding oil reservoir output liquid obtains effective re-injection.With each test block production fluid every day amount 250m
3Calculate, can reduce 91250m every year
3Wastewater disposition can be saved wastewater disposition and impose a fine 18.250 ten thousand yuan.
(4) operability and with strong points can carry out in time replenishing reaching the injection standard according to nutriment in the output liquid and microorganism deletion condition, and the field trial effect is remarkable, and the microbial flooding field trial improves recovery ratio 7.5%.
Description of drawings:
Accompanying drawing 1 is a process chart of the present invention.
The specific embodiment:
Below in conjunction with accompanying drawing to further explain of the present invention.
Embodiment 1---and with the pilot test of Shengli Oil Field block microbial flooding is example:
The Shengli Oil Field piece is chosen to be microbial oil displacement pilot test district, and the trial zone oozes in being, the hydrophilic oil reservoir of loose sand of middle saturation ratio, medium-high viscosity, fluvial facies deposit, buried depth 973m～1230m, 54 ℃ of reservoir temperatures.Coefficient of permeability variation 0.545, degree of porosity 32%, air permeability 1.1 μ m
2～2.2 μ m
2Trial zone oil area 0.96km
2, effective thickness 9.4m, oil in place 264.9 * 10
4T.12 mouthfuls of oil wells, 4 mouthfuls in well, comprehensive water cut 90.9% at present.Plan utilization microbial flooding oil reservoir of the present invention output liquid cycling and reutilization method concrete steps are following:
At first target block output liquid is carried out water-oil separating (so because this block output liquid does not have the gas-liquid separation of the gas generation first step to save); The method that water-oil separating adopts heating and Gravity Separation to combine; Be separated to 20 tons of this block crude oil every day, output water 200m
3
Secondly this block is separated the output water that obtains and carry out the oil-polluted water biochemical treatment;
Biochemical treatment+filtering technique is adopted in water treatment, and the water treatment ability is 250m
3/ d, oil-containing is 25.0mg/L in the preceding output water of processing, and suspension content is 126.5mg/L, and oxygen content is 1.6mg/L, severe overweight.
Oil-containing is 0.6mg/L in the output water of processing back, and suspension content is 3.5mg/L, and oxygen content is 0.1mg/L, reaches national A1 grade standard.
Then microorganism and composition of nutritive substance and component in the output water are detected;
Microorganism and nutriment testing result are following in the output water:
Microorganism and nutriment testing result in the table 1 output water
Secondly, the injection water microorganism and the nutriment that provide with reference to this method inject standard, and microorganism in the output water and nutriment are adjusted and replenish; From testing result, microbiologic population reaches and injects water microorganism injection standard than horn of plenty in the output water, therefore need not replenish microorganism.Carbon source concentration is 85.6mg/L in the nutrients, is lower than standard.Need the amount of supplementary carbon source to be:
200×1000×（100-85.6）=2.88×10
6mg=2.88×10
3kg/d
Wherein technical grade glucose sugar, sugaring residue discarded object, blackstrap, stalk roughing liquid and wheat hydrolyzate dosage are respectively 1.31 * 10
3Kg/d, 0.33 * 10
3Kg/d, 0.33 * 10
3Kg/d, 0.39 * 10
3Kg/d and 0.52 * 10
3Kg/d.
Adjusted output water injects from 4 mouthfuls of water injection wells of this oil reservoir, and this block comprehensive water cut 90.0% reduces to 81.6% before adjust after 15 days, and the 20t/d of oil production before adjust is increased to 46t/d.It is obvious to increase oil and dewatering effect.
Claims (7)
1. output liquid circulation process method that is used for microbial oil displacement is characterized in that may further comprise the steps:
(1) microbial flooding oil reservoir oil gas aqueous mixtures carries out gas-liquid separation;
(2) method that employing is heated and Gravity Separation combines is to the water-oil separating of microbial flooding oil reservoir extraction liquid;
(3) produced water treatment: remove part suspension and crude oil, reduce oxygen content, reach and inject the land that abounds in rivers and lakes A1 of man grade standard; Biochemical treatment+filtering technique is adopted in produced water treatment, and the sewage with oil after the processing is less than 1.0mg/L, and suspension content SS is less than 5.0mg/L, and oxygen content is less than 0.1mg/L;
(4) output water nutrition composition and microorganism and metabolite detect: described output water nutrition composition detection comprises the detection to carbon source, nitrogenous source and phosphorus source, and its detection method is respectively bio-sensing analytic approach, alkaline alkaline potassium per-sulfate digestion ultraviolet spectrophotometry and ammonium molybdate AAS; Described microorganism and metabolite detect: comprise little molecule acid, surface tension, little molecule acid detection method is a gas chromatography, and surface tension is tested with surface tension instrument;
(5) according to testing result, judge whether nutrition and microorganism reach the injection standard, directly inject if reach the injection standard, otherwise extra-nutrition or microorganism are until reaching the re-injection of injection standard;
(6) repeat above step.
2. the output liquid circulation process method that is used for microbial oil displacement according to claim 1; It is characterized in that: the injection standard that the microbial flooding oil reservoir in the step (5) injects the water nutrient solution is according to following mass ratio, carbon source: nitrogenous source: phosphorus source=1:0.10～0.15:0.01～0.05.
3. the output liquid circulation process method that is used for microbial oil displacement according to claim 1 is characterized in that: the injection standard that the microbial flooding oil reservoir in the step (5) injects the water microorganism is that the SRB implantation concentration is not less than 1.0 * 10
7Individual/ml, TGB implantation concentration is not less than 2.5 * 10
7Individual/ml, HOB implantation concentration is not less than 1.1 * 10
7Individual/ml, FB implantation concentration is not less than 1.5 * 10
7Individual/ml.
4. the output liquid circulation process method that is used for microbial oil displacement according to claim 2; It is characterized in that: described carbon source is made up of by 1:0.1～0.5:0.1～0.5:0.2～0.5:0.2～0.5 mass ratio technical grade glucose sugar, sugaring residue discarded object, blackstrap, stalk roughing liquid and wheat hydrolyzate, and the carbon source implantation concentration is not less than 100mg/L.
5. the output liquid circulation process method that is used for microbial oil displacement according to claim 2; It is characterized in that: described nitrogenous source is made up of by 1:0.2～0.3:0.2～0.4:0.1～0.2:0.1～0.3 mass ratio ammonium nitrate, ammonium chloride, peptone, Dried Corn Steep Liquor Powder and soybean cake powder, and the absolute implantation concentration of nitrogenous source is no more than 10mg/L.
6. the output liquid circulation process method that is used for microbial oil displacement according to claim 2 is characterized in that: described phosphorus source is made up of by 1:0.8～1.0 mass ratios diammonium hydrogen phosphate and ammonium dihydrogen phosphate (ADP), and the absolute implantation concentration in phosphorus source is no more than 1mg/L.
7. the output liquid circulation process method that is used for microbial oil displacement according to claim 1 is characterized in that: described little molecule acid is meant formic acid, acetate, propionic acid and butyric acid.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102966340A (en) * | 2012-11-15 | 2013-03-13 | 中国石油天然气股份有限公司 | Microbial circulation oil displacement method by continuously injecting low-concentration nutrient solution |
| CN104560824A (en) * | 2014-12-31 | 2015-04-29 | 中国石油天然气股份有限公司 | Extraction method and analysis method of microbial thallus in oil reservoir |
| CN116950625A (en) * | 2023-09-19 | 2023-10-27 | 克拉玛依市新易通生物科技有限公司 | Microorganism cold-position exploitation method and microorganism circulating injection and extraction system |
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|---|---|---|---|---|
| US5083610A (en) * | 1988-04-19 | 1992-01-28 | B. W. N. Live-Oil Pty. Ltd. | Recovery of oil from oil reservoirs |
| CN1164607A (en) * | 1997-05-19 | 1997-11-12 | 周祖辉 | Circulation-type microbial oil displacement and production method |
| CN102071933A (en) * | 2010-11-13 | 2011-05-25 | 中国石油化工股份有限公司 | Method and device for sampling produced fluid of oil reservoir for microbial flooding |
| CN102174609A (en) * | 2011-01-21 | 2011-09-07 | 天津工业生物技术研究所 | Field fermentation system for oil displacement biological surfactant |
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2011
- 2011-11-17 CN CN2011103642660A patent/CN102425398A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5083610A (en) * | 1988-04-19 | 1992-01-28 | B. W. N. Live-Oil Pty. Ltd. | Recovery of oil from oil reservoirs |
| CN1164607A (en) * | 1997-05-19 | 1997-11-12 | 周祖辉 | Circulation-type microbial oil displacement and production method |
| CN102071933A (en) * | 2010-11-13 | 2011-05-25 | 中国石油化工股份有限公司 | Method and device for sampling produced fluid of oil reservoir for microbial flooding |
| CN102174609A (en) * | 2011-01-21 | 2011-09-07 | 天津工业生物技术研究所 | Field fermentation system for oil displacement biological surfactant |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102966340A (en) * | 2012-11-15 | 2013-03-13 | 中国石油天然气股份有限公司 | Microbial circulation oil displacement method by continuously injecting low-concentration nutrient solution |
| CN102966340B (en) * | 2012-11-15 | 2017-02-01 | 中国石油天然气股份有限公司 | Microbial circulation oil displacement method by continuously injecting low-concentration nutrient solution |
| CN104560824A (en) * | 2014-12-31 | 2015-04-29 | 中国石油天然气股份有限公司 | Extraction method and analysis method of microbial thallus in oil reservoir |
| CN104560824B (en) * | 2014-12-31 | 2017-07-07 | 中国石油天然气股份有限公司 | Extraction method and analysis method of microbial thallus in oil reservoir |
| CN116950625A (en) * | 2023-09-19 | 2023-10-27 | 克拉玛依市新易通生物科技有限公司 | Microorganism cold-position exploitation method and microorganism circulating injection and extraction system |
| CN116950625B (en) * | 2023-09-19 | 2023-12-26 | 克拉玛依市新易通生物科技有限公司 | Microorganism cold-position exploitation method and microorganism circulating injection and extraction system |
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