CN101131077A - Well choosing method for microbial oil extraction - Google Patents
Well choosing method for microbial oil extraction Download PDFInfo
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- CN101131077A CN101131077A CNA2006100304356A CN200610030435A CN101131077A CN 101131077 A CN101131077 A CN 101131077A CN A2006100304356 A CNA2006100304356 A CN A2006100304356A CN 200610030435 A CN200610030435 A CN 200610030435A CN 101131077 A CN101131077 A CN 101131077A
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Abstract
The present invention discloses well sorting method for microbial petroleum producing process. The well sorting method is to sort oil well meeting the following conditions: 1. bottom hole temperature not higher than 95 deg.c and formation pressure not higher than 24 MPa; 2. formation water salinity lower than 17x10<4> mg/L, pH value of 5-9 and water content of 5-98 %; 3. stratum permeability higher than 50x10<-3> l/sq m, and raw oil viscosity lower than 4000 mPa.S and wax content over 3 %; 4. no viscosity reduction, chemical wax elimination, chemical sand solidification and other measures taken in near time; 5. capacity of producing normally without low pressure thief zone and other faults; and 6. preferably sandrock oil reservoir with small fault block, oil sheet and low water flooding control degree.
Description
Technical field
The present invention relates to a kind of microbe oil production method technical field.
Background technology
Microbe oil production is to utilize the useful activity of microorganism self such as degrading crude oil and/or metabolite such as biosurfactant, organic acid, alcohol to wait the oil recovery technique that improves oil recovery factor.
The microbe oil production technology has been succeedd in some countries and has been used at present.Russian scientist uses multiple microorganism and the catalyzer that is suitable for oil existence to place in the flow string together, and its metabolic product can strengthen the flowability of oil greatly, thereby improves recovery ratio.Utilize the microbial degradation technology that the heavy ends such as pitch in the crude oil are degraded, can reduce viscosity of crude, improve oil recovery, this technology has obtained preliminary application in oil recovery process, and the trend that continues development is arranged.The theoretical foundation of this technology is to use the aerated water that adds nitrogen, phosphorus, ammonium salt to make stratum microorganism activation.Compare with other tertiary oil recovery technologies, that this technology has is applied widely, technology simple, small investment, instant effect, characteristics such as pollution-free.
Microbe oil production is a technology of utilizing activity and the metabolin intensified oil reduction thereof of microorganism, dominant mechanism is that bacterial strain is bred in oil reservoir, the metabolism oil, metabolism produces gases such as CO2, N2, H2 and CH2, makes the heavy hydrocarbon degraded, reduces viscosity of crude, simultaneously, the bacterium that utilizes alkane to make carbon source in the procreation process, can produce amphipathic surface reactive material under the alkane environment, and some flora can decompose colloid.These surface reactive materials can make emulsified viscous oil, thereby reduce viscosity of crude.Its metabolin can reduce oil water interfacial tension, and the gas that produces in the metabolic process can change the fluid ability of crude oil, increases the permeability of layer of sand, thereby improves the recovery ratio in oil field.
Summary of the invention
The purpose of this invention is to provide a kind of suitable oil well of how choosing, the method that is suitable for microbe oil production improves the productive rate of crude oil.The basic function of microbe oil production mainly contain following some:
1. gases such as the CO2 that produces in the metabolic process, N2, H2 and CH4 can recover and improve strata pressure, can reduce fluid viscosity.2. the Bio-surface active material of metabolism generation can reduce the tension force of oil-water interfaces, and emulsified crude oil, changes the wetability at reservoir rock interface, thereby improves the relative permeability of rock to crude oil.3. the decomposition enzyme of metabolism generation has good viscosity reduction effect to crude oil, and heavy hydrocarbon and paraffinic components in the energy cracking crude oil reduce viscosity of crude, reduce near the deposition of paraffin well, improve crude oil in underground flowability.4. the biopolymer that produces of metabolism can be adjusted the intake profile of oil reservoir, and the mobility ratio of the high infiltration of control band is improved waterflooding effect.5. the carbonate of the organic acid that produces of metabolism in can the corrosion LIMESTONE RESERVOIR, and then enlarge crack and passage, improve in-place permeability.
Be easy to be destroyed under the reservoir condition that the limitation of microbe oil production technology is that microorganism is higher in temperature, salinity is big, heavy metal ion content is higher, the surfactant of microorganisms and biopolymer itself have the danger of the precipitation of causing, and cultivate difficult assurance of condition of microorganism.
The applicant studies a large amount of microbe oil production oil wells, finds, when selecting test well, selects as far as possible the relatively mild conditions down-hole of bacterium.Therefore, for achieving the above object, the technical scheme that the present invention takes is:
The well choosing method of microbe oil production, this method are to choose the oil well that meets the following conditions:
1. bottom hole temperature (BHT) is the highest is no more than 95 ℃, and strata pressure is no more than 24M Pa;
2. formation water salinity is lower than 17 * 104m g L, between the pH value 5-9, comprehensive water cut 5%～98%;
3. in-place permeability is higher than 50 * 10-3Lm2.Viscosity of crude is lower than 4000M Pa.S, the oil reservoir of the content of wax more than 3%;
4. oil well does not have measures such as viscosity reduction, chemistry are anti-clearly, chemical consolidated sand in the recent period;
5. oil well can ordinary production, does not have the low pressure lost-circulation zone, the hole condition fault-free;
6. microbe oil production is stronger for little fault block, oil sheet, sandstone oil reservoir compliance that water drive control degree is low.
Beneficial effect of the present invention: the utilization said method, to choose suitable oil well and utilize method of microorganism to recover the oil, effect is fine.Carried out the microbial single well stimulation test in 2002,, stayed the 22 mouthfuls of wells in oil field to implement microorganism huff and puff at literary composition according to the microbial single well technical condition, opening well and making production after closing well 2-60 days after the measure, effective 18 wells, the oily 18.3t d that on average increases day by day, year increases oily 2168t.Obtained obvious effects.Simultaneously, the oil pumper electric current reduces, and pump detection period obviously prolongs.
The specific embodiment
The present invention is further illustrated below in conjunction with the specific embodiment:
Utilize method of the present invention to select well, this method is to choose the oil well that meets the following conditions:
1. bottom hole temperature (BHT) is the highest is no more than 95 ℃, and strata pressure is no more than 24M Pa;
2. formation water salinity is lower than 17 * 104mg L, between the pH value 5-9, comprehensive water cut 5%～98%;
3. in-place permeability is higher than 50 * 10-3Lm2.Viscosity of crude is lower than 4000M Pa.S, the oil reservoir of the content of wax more than 3%;
4. oil well does not have measures such as viscosity reduction, chemistry are anti-clearly, chemical consolidated sand in the recent period;
5. oil well can ordinary production, does not have the low pressure lost-circulation zone, the hole condition fault-free;
6. microbe oil production is stronger for little fault block, oil sheet, sandstone oil reservoir compliance that water drive control degree is low.
Choose the literary composition that satisfies above-mentioned condition and stay the oil field, this oil field part block low-porosity low-permeability, the high content of wax, freezing point is at 30-40 ℃, wax card phenomenon takes place in part pumpingh well often, conventional heat is washed because of heat waste causes weak effect and frequent heat to be washed bigger infringement is caused on the stratum, adopts modes such as adding paraffin remover to be subjected to the little limitation of the high process range of cost can not satisfy the needs of oil recovery unit.Carried out the microbial single well stimulation test in 2002,, stayed the 22 mouthfuls of wells in oil field to implement microorganism huff and puff at literary composition according to the microbial single well technical condition, opening well and making production after closing well 2-60 days after the measure, effective 18 wells, the oily 18.3t d that on average increases day by day, year increases oily 2168t.Obtained obvious effects.Simultaneously, the oil pumper electric current reduces, and pump detection period obviously prolongs.
Claims (1)
1. the well choosing method of microbe oil production, this method is to choose the oil well that meets the following conditions:
A, bottom hole temperature (BHT) is the highest is no more than 95 ℃, and strata pressure is no more than 24M Pa;
B, formation water salinity are lower than 17 * 104m g L, between the pH value 5-9, comprehensive water cut 5%～98%;
C, in-place permeability are higher than 50 * 10-3Lm2.Viscosity of crude is lower than 4000M Pa.S, the oil reservoir of the content of wax more than 3%;
D, oil well do not have measures such as viscosity reduction, chemistry are anti-clearly, chemical consolidated sand in the recent period;
E, oil well can ordinary production, do not have the low pressure lost-circulation zone, the hole condition fault-free;
F, microbe oil production are stronger for little fault block, oil sheet, sandstone oil reservoir compliance that water drive control degree is low.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006100304356A CN101131077A (en) | 2006-08-25 | 2006-08-25 | Well choosing method for microbial oil extraction |
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| CNA2006100304356A CN101131077A (en) | 2006-08-25 | 2006-08-25 | Well choosing method for microbial oil extraction |
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| CN101131077A true CN101131077A (en) | 2008-02-27 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105512450A (en) * | 2014-09-23 | 2016-04-20 | 中国石油天然气股份有限公司 | Method and device for quantitative well selection based on oil well measures |
| CN105927185A (en) * | 2016-04-29 | 2016-09-07 | 烟台智本知识产权运营管理有限公司 | Huff-puff stimulation method for single high-temperature high-salinity high-wax-content oil well |
| CN105512450B (en) * | 2014-09-23 | 2018-06-01 | 中国石油天然气股份有限公司 | Quantitative well choosing method and device based on oil well measure |
| CN109577933A (en) * | 2018-10-24 | 2019-04-05 | 山西晋城无烟煤矿业集团有限责任公司 | A kind of microorganism volume increase coal bed gas well location selection method |
| CN110644953A (en) * | 2019-10-28 | 2020-01-03 | 中国石油化工股份有限公司 | Microbial in-situ sand consolidation method for loose sandstone oil reservoir |
| CN111985735A (en) * | 2019-05-05 | 2020-11-24 | 中国石油天然气股份有限公司 | Endogenous microbial oil displacement oil reservoir screening and evaluating method |
| CN112832726A (en) * | 2021-01-14 | 2021-05-25 | 长江大学 | Tertiary oil recovery method for oil displacement between single-well huff-puff sections of compact oil shale oil horizontal well |
| CN114320276A (en) * | 2020-09-30 | 2022-04-12 | 中国石油天然气股份有限公司 | Method and device for determining wax removal and prevention effect through microorganisms |
-
2006
- 2006-08-25 CN CNA2006100304356A patent/CN101131077A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105512450A (en) * | 2014-09-23 | 2016-04-20 | 中国石油天然气股份有限公司 | Method and device for quantitative well selection based on oil well measures |
| CN105512450B (en) * | 2014-09-23 | 2018-06-01 | 中国石油天然气股份有限公司 | Quantitative well choosing method and device based on oil well measure |
| CN105927185A (en) * | 2016-04-29 | 2016-09-07 | 烟台智本知识产权运营管理有限公司 | Huff-puff stimulation method for single high-temperature high-salinity high-wax-content oil well |
| CN105927185B (en) * | 2016-04-29 | 2018-07-31 | 烟台智本知识产权运营管理有限公司 | A kind of method of high temperature and high salt high-content wax oil well single well stimulation volume increase |
| CN109577933A (en) * | 2018-10-24 | 2019-04-05 | 山西晋城无烟煤矿业集团有限责任公司 | A kind of microorganism volume increase coal bed gas well location selection method |
| CN111985735A (en) * | 2019-05-05 | 2020-11-24 | 中国石油天然气股份有限公司 | Endogenous microbial oil displacement oil reservoir screening and evaluating method |
| CN110644953A (en) * | 2019-10-28 | 2020-01-03 | 中国石油化工股份有限公司 | Microbial in-situ sand consolidation method for loose sandstone oil reservoir |
| CN114320276A (en) * | 2020-09-30 | 2022-04-12 | 中国石油天然气股份有限公司 | Method and device for determining wax removal and prevention effect through microorganisms |
| CN114320276B (en) * | 2020-09-30 | 2023-09-26 | 中国石油天然气股份有限公司 | Method and device for determining wax removal and prevention effects by microorganisms |
| CN112832726A (en) * | 2021-01-14 | 2021-05-25 | 长江大学 | Tertiary oil recovery method for oil displacement between single-well huff-puff sections of compact oil shale oil horizontal well |
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Application publication date: 20080227 |