CN103670347A - Method for producing methane by converting carbon dioxide through methanobacterium thermaggregans in activated reservoir - Google Patents

Method for producing methane by converting carbon dioxide through methanobacterium thermaggregans in activated reservoir Download PDF

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CN103670347A
CN103670347A CN201310479743.7A CN201310479743A CN103670347A CN 103670347 A CN103670347 A CN 103670347A CN 201310479743 A CN201310479743 A CN 201310479743A CN 103670347 A CN103670347 A CN 103670347A
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methane
carbon dioxide
bacterium
acetate
oil reservoir
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CN103670347B (en
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牟伯中
刘金峰
杨世忠
王立影
孙晓博
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Daqing Huali Biotechnology Co.,Ltd.
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East China University of Science and Technology
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Abstract

The invention relates to a method for producing methane by converting carbon dioxide through methanobacterium thermaggregans in an activated reservoir. The method comprises the following steps that it is analyzed and determined that at least one type of syntrophic monads or thermotoga maritime exists in an target reservoir fluid, and meanwhile at least one of methanobacteria, thermophilic methanobacteria, methanolinea, methanospirillum and methanoculleus exists; acetic acid or acetate is injected into the reservoir to enable the concentration of the acetic acid or the acetate to be 5.0-10.0 millimoles; methane is obtained. Compared with the prior art, the method can greatly improve the carbon dioxide reduction type methanogenesis rate, and has the advantages of being economical, convenient, simple, feasible and the like.

Description

The raw methanogenic method of methanogen chemical recycling of carbon dioxide in activation oil reservoir
Technical field
The present invention relates to oil pool microorganisms exploitation and utilize technical field, being specifically related to utilize oil pool microorganisms to transform CO 2methanogenic technical method.
Background technology
Oil reservoir is to be arranged in underground hundreds of rice to thousands of rice, crude oil in single trap, to have the basic gathering of same pressure system.The microorganism breeding in this environment has the features such as species are many, metabolic type is many, interrelated, structure is relatively stable.For specific oil reservoir, through developing and adapt to for a long time, microorganism has wherein formed comparatively stable group.At present, in water-drive pool, exist Methane producing bacteria and methane biosynthesis has become the generally accepted fact.The characteristics such as thermophilic and salt tolerant that the methanogen Methanobacterium thermaggregans being separated to from undeveloped reserves has have good uniformity with separated reservoir media, illustrate that methanogen is typical indigenous bacterium in oil reservoir.
Studies confirm that CO 2geological storage is to reduce CO 2the effective way of discharge.CO 2bury that the impact that environment is produced is little, cost is lower, has uniformity with the world, domestic relevant policies, rules.Research and practice proves, oil-gas reservoir, and being particularly on the verge of exhausted oil-gas reservoir is CO 2the best place of Geological storage.
Studies confirm that to have CO in oil reservoir 2be converted into the potentiality of methane.Oil reservoir is being grown diversified microorganism and is being formed metastable microbiologic population.In oil field stratum water, the general separable microorganism that goes out different physiological groups is as zymophyte, sulfate reducing bacteria, nitrate reduction bacterium and the methanogen etc. of aerobic chemoheterotrophic bacteria (as hydrocarbon oxidation bacterium) and anaerobism.This use for laboratory clone library method has been analyzed on Chinese Continental the structure of community of microorganism in high temperature (75 ℃) water-drive pool output water sample, find to have abundant microorganism in high-temperature oil reservoir, be mainly the bacterium of Firmicutes (Firmicutes), thermobacillus door (Thermotogae), hydrogen auxotype (Methanomicrobiales, Methanococcale, Methanobacteriales) and the ancient bacterium such as acetic acid auxotype methanogen (Methanosarcinales).The methanogen of finding in oil reservoir mainly comprises methagen and sarcina methanica, and in methagen, typical bacterium is Bu Shi methagen (M bryantii) and formic acid methagen (Mformicicum), and both all can utilize CO 2/ H 2produce methane.
In oil reservoir, microbial activity is low, CO under nature 2bio-transformation is that the speed of methane is lower.Because nutriment in oil reservoir is deficient, micro organism quantity is generally lower.Knapp etc. are studied the microorganism in Payne county, Oklahoma state SEVVSU oil field unit reservoir, find that wherein methanogen quantity is only 2～46cells/ml.Equally, in 302 stratum, unit, Romashkino oil field, zymophyte concentration is about 10 2～10 4cells/ml, Methane producing bacteria concentration is about 1～10 2cells/ml.Romashkino oil field methane is mainly produced by heavy carbonate, and speed is 0.0126～0.2786ml CH 4l -1day -1.Siberia Mamontovskoe high temperature oil field is in water injection well well bottom zone, and methane passes through HCO 3 -synthetic with acetate, speed is 0.0327～5.3130m1CH 4l -1day -1; In the region being connected with producing well, methane mainly synthesizes by acetate, and speed is 0.0041～0.1291ml CH 4l -1day -1.Therefore, no matter subsurface deposit condition or laboratory condition, in oil reservoir, microorganism all has CO 2bio-transformation is the ability of methane, but because under natural conditions, oil pool microorganisms concentration is low, metabolic activity is low.
Summary of the invention
Object of the present invention is exactly to provide a kind of carbon dioxide reduction type that can greatly improve to produce methane speed in order to overcome the defect that above-mentioned prior art exists, and has the raw methanogenic method of methanogen chemical recycling of carbon dioxide in economy, simple and feasible activation oil reservoir.
Object of the present invention can be achieved through the following technical solutions: a kind of raw methanogenic method of methanogen chemical recycling of carbon dioxide in activation oil reservoir, it is characterized in that, and the method comprises the steps:
(1) in Analysis deterrmination target reservoir fluid, at least there is a kind of bacterium in syntrophism monad (Syntrophomonadaceae) or thermobacillus (Thermotogaceae), there is at least one in following bacterium: methagen (Methanobacterium) simultaneously, thermophilic methagen (Methanothermobacter), methane rope bacterium (Methanolinea), methanospirillum (Methanospirillum), methane capsule bacterium (Methanoculleus);
(2) in oil reservoir, inject acetic acid or acetate, making in oil reservoir water acetic acid or acetate concentration is 5.0～10.0mM;
(3) results methane.
The described acetate concentration of step (2) is 6.8mM, and described acetate includes but not limited to acetate sodium, potassium acetate.
The described results methane of step (3) is gathered in the crops by Injection Well or gathers in the crops from producing well.
Syntrophism monad (Syntrophomonadaceae) or thermobacillus (Thermotogaceae), methagen (Methanobacterium) in step (1) Analysis deterrmination target reservoir fluid, thermophilic methagen (Methanothermobacter), methane rope bacterium (Methanolinea), methanospirillum (Methanospirillum), methane capsule bacterium (Methanoculleus), adopts the 16S rDNA method of document [International Biodeterioration & Biodegradation] the 65th phase 444-450 page report in 2011 to carry out Analysis and Identification.
Compared with prior art, the present invention utilizes indigenous microorganism in oil reservoir by CO 2be reduced into CH 4be many biological complex biological courses of reaction that participate in, need multiple-microorganism acting in conjunction just can complete, in downstream reaction process, most probable reaction path is that acetic acid is produced H by acetic acid oxidation bacterium 2, the methanogen recycling H of hydrogen auxotype 2and CO 2produce methane, there is food chain structure.Research discovery, the Steps of this reaction is mainly that hydrogen process is produced in fungal component (Syntrophus) oxidation.The present invention is by injecting short chain organic acid salt, stimulate syntrophism monad (Syntrophomonadaceae) or/and thermobacillus (Thermotogaceae) growth metabolism, and then activate downstream carbon dioxide reduction type methanogen, improved thus reduction CO 2methanogenic speed.The present invention can greatly improve carbon dioxide reduction type and produce methane speed, has economy, the advantage such as simple and feasible.
Accompanying drawing explanation
Fig. 1 is that sodium acetate is on producing the impact of methane upstream bacteria flora;
Fig. 2 is the impact that sodium acetate forms methanogen.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment 1
Analyze in Daqing oil field block production fluid and contain syntrophism monad (Syntrophomonadaceae) and thermobacillus (Thermotogaceae) and thermophilic methagen (Methanothermobacter), with these production fluid preparation 2 cultivating systems (composing system is in Table 1～3), at 55 ℃, cultivate 180 days, system does not all detect CH 4, show that in system, methanogen activity is very low.Then one of them system remains unchanged, and another one system adds 0.41g (5mM) sodium acetate, cultivates 12 days, CH all detected in two systems 4, cultivate after 120 days CH in two systems 4content is respectively 18.3mmol/L (interpolation sodium acetate) and 2.7mmol/L (not adding sodium acetate).2 individual system colony assay are shown in Fig. 1 and Fig. 2.As seen from Figure 1, syntrophism monad (Syntrophomonadaceae) abundance is not brought up to 57% (adding sodium acetate system) by 20% (adding sodium acetate system).As seen from Figure 2, methanogen Methanothermobacter abundance is not brought up to 98% (adding sodium acetate system) by 52% (adding sodium acetate system).After showing to add sodium acetate, participate in CO 2transform and produce CH 4process or with it closely-related microorganism have been activated or abundance has increased, and flora is to being conducive to reduce CO 2produce methane direction evolution, methane production improves nearly 7 times simultaneously.
Embodiment 2
Analyze in North China Oilfield block production fluid, contain 9.5% syntrophism monad (Syntrophomonadaceae) and and 18.3% methagen (Methanobacterium) and 10.8% methane rope bacterium (Methanolinea), with these production fluid preparation 2 cultivating systems (composing system is in Table 1～3), at 38 ℃, cultivate 100 days, two individual system all do not detect CH 4, show that in system, methanogen activity is very low.Then keep an individual system constant, in another system, add 0.56g (6.8mM) sodium acetate, continue cultivation and in two systems, CH detected after 33 days 4, cultivate after 75 days CH in two systems 4content is respectively 4.7mmol/L (not adding sodium acetate) and 22.4mmol/L (interpolation sodium acetate).In system, syntrophism monad (Syntrophomonadaceae) abundance is not brought up to 57% (adding sodium acetate system) by 20% (adding sodium acetate system).Methagen (Methanobacterium) and methane rope bacterium (Methanolinea) 18.3% and 10.8% are increased to and add 33.7% and 12.2% of sodium acetate system by what do not add sodium acetate system respectively.
Embodiment 3
Analyze and in Xinjiang Oilfield block production fluid, to contain the thermobacillus (Thermotogaceae) of 15.7% syntrophism monad (Syntrophomonadaceae) and 9.6% and 23.2% thermophilic methagen (Methanobacterium), 13.7% methane capsule bacterium (Methanoculleus), with these production fluid preparation 2 cultivating systems (composing system is in Table 1～3), at 21 ℃, cultivate 64 days, two individual system all do not detect CH 4, show that in system, methanogen activity is very low.Then keep an individual system constant, in another system, add 0.98g (10mM) potassium acetate, continue to cultivate 23 days, CH in two systems, all detected 4, cultivate after 143 days CH in two systems 4content is respectively 3.2mmol/L (not adding potassium acetate system) and 37.2mmol/L (adding potassium acetate system).In system, syntrophism monad (Syntrophomonadaceae) abundance is not brought up to 37.6% (adding potassium acetate system) by 15.7% (adding potassium acetate system), and thermobacillus (Thermotogaceae) does not fade to 10.2% (adding potassium acetate system) by 9.6% (adding potassium acetate system)).Thermophilic methagen (Methanobacterium) does not fade to 45.0% (adding potassium acetate system) by 23.2% (adding potassium acetate system), and methane capsule bacterium (Methanoculleus) 13.7% (not adding potassium acetate system) becomes 28.6% (adding potassium acetate system).
Table 1 cultivating system forms
Figure BDA0000395404050000051
Table 2 vitamin
Figure BDA0000395404050000052
Table 3 trace element

Claims (4)

1. the raw methanogenic method of methanogen chemical recycling of carbon dioxide in activation oil reservoir, is characterized in that, the method comprises the steps:
(1) in Analysis deterrmination target reservoir fluid, at least there is a kind of bacterium in syntrophism monad (Syntrophomonadaceae) or thermobacillus (Thermotogaceae), there is at least one in following bacterium: methagen (Methanobacterium) simultaneously, thermophilic methagen (Methanothermobacter), methane rope bacterium (Methanolinea), methanospirillum (Methanospirillum), methane capsule bacterium (Methanoculleus);
(2) in oil reservoir, inject acetic acid or acetate, making in oil reservoir water acetic acid or acetate concentration is 5.0～10.0mM;
(3) results methane.
2. the raw methanogenic method of methanogen chemical recycling of carbon dioxide in activation oil reservoir according to claim 1, is characterized in that, the described acetate concentration of step (2) is 6.8mM, and described acetate includes but not limited to acetate sodium, potassium acetate.
3. the raw methanogenic method of methanogen chemical recycling of carbon dioxide in activation oil reservoir according to claim 1, is characterized in that, the described results methane of step (3) is gathered in the crops by Injection Well or gathers in the crops from producing well.
4. in activation oil reservoir according to claim 1, methanogen chemical recycling of carbon dioxide is given birth to methanogenic method, it is characterized in that, syntrophism monad (Syntrophomonadaceae) or thermobacillus (Thermotogaceae) in step (1) Analysis deterrmination target reservoir fluid, methagen (Methanobacterium), thermophilic methagen (Methanothermobacter), methane rope bacterium (Methanolinea), methanospirillum (Methanospirillum), methane capsule bacterium (Methanoculleus), adopt the 16S rDNA method of document [International Biodeterioration & Biodegradation] the 65th phase 444-450 page report in 2011 to carry out Analysis and Identification.
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Cited By (4)

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CN106013939A (en) * 2016-07-07 2016-10-12 四川大学 Underground city
CN106544369A (en) * 2016-10-11 2017-03-29 华东理工大学 Promote oil pool microorganisms conversion CO2Methanogenic method
CN108424947A (en) * 2018-03-15 2018-08-21 华东理工大学 It is a kind of to utilize micro-reduction CO2The method of methane phase and acetic acid simultaneously
CN110317835A (en) * 2018-03-30 2019-10-11 中国石油化工股份有限公司 A kind of reinforcing methanogen conversion CO2The method of synthesizing methane

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CN106929420A (en) * 2017-04-12 2017-07-07 临沂大学 A kind of method of decomposing petroleum hydrocarbon

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CN1988971A (en) * 2004-05-28 2007-06-27 纽卡斯尔大学 Process for stimulating production of hydrogen from petroleum in subterranean formations
CN1988970A (en) * 2004-05-28 2007-06-27 纽卡斯尔大学 Process for stimulating production of methane from petroleum in subterranean formations
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CN102329768A (en) * 2011-09-19 2012-01-25 华东理工大学 Flora construction method for residual oil gasification exploitation of oil deposit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106013939A (en) * 2016-07-07 2016-10-12 四川大学 Underground city
CN106544369A (en) * 2016-10-11 2017-03-29 华东理工大学 Promote oil pool microorganisms conversion CO2Methanogenic method
CN108424947A (en) * 2018-03-15 2018-08-21 华东理工大学 It is a kind of to utilize micro-reduction CO2The method of methane phase and acetic acid simultaneously
CN110317835A (en) * 2018-03-30 2019-10-11 中国石油化工股份有限公司 A kind of reinforcing methanogen conversion CO2The method of synthesizing methane

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