CN108708692A - A kind of method of biology in situ fluidization exploitation solid coal - Google Patents
A kind of method of biology in situ fluidization exploitation solid coal Download PDFInfo
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- CN108708692A CN108708692A CN201810392141.0A CN201810392141A CN108708692A CN 108708692 A CN108708692 A CN 108708692A CN 201810392141 A CN201810392141 A CN 201810392141A CN 108708692 A CN108708692 A CN 108708692A
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- well
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/34—Arrangements for separating materials produced by the well
Abstract
The invention belongs to coal mining method and technology fields, and in particular to a kind of method that exploitation solid coal is realized in biology in situ fluidization includes the following steps：1：It determines injecting scheme and exploiting field size, carries out tamed strain and fermentation, while biological closure is carried out to section boundary, and according to the characteristic of coal seam reservoirs design well pattern and deployment well pattern；2：Production system is arranged in exploiting field, and exploiting field is pre-processed.Step 3：Microbial fermentation solution is injected, realizes microorganism in situ conversion.Step 4：Reaction product is recycled, and carries out extraction separation.Step 5：First exploiting field uses high pressure steam sterilization after having adopted, and carries out well net deployment to taking over exploiting field, repeats the above steps.The bioanalysis that the present invention provides realizes the fluidization in situ exploitation of coal, and method is simple and practicable, can be widely applied to solid coal mining field.
Description
Technical field
The invention belongs to coal mining method and technology fields, and in particular to a kind of biology in situ fluidization realization exploitation solid
The method of coal.
Background technology
From mineral resources occurrence status, fluidised form mineral resources（Gaseous state and liquid）It is being developed compared to solid resource
It has a clear superiority in difficulty and economic benefit.Many scholars attempt to provide solid by the method for physics, chemistry, biology thus
Source switchs to fluid and is developed in situ, is adopted as natural gas solid hydrate turn of tidal stream state melts hair, gasification of coal in place, microorganism
Oil, high heat rock mass geothermal exploitation, microorganism volume increase coal bed gas, oil shale in-situ heating development technique etc..2014, thank to peace
Academician systematically proposes the academic conception that solid-state resource fluidised form melts hair, opens solid resource fluidised form comprehensively and melts the new of hair
Situation.2017, the team of Zhou Shouwei academician built up the first gas hydrates solid state fluidizing exploitation physical analogy reality in the world
Check system advances the flow of research that solid-state turn of tidal stream state melts hair.In the following 20-30, solid-state resource fluidised form melts hair and is expected to
It is achieved along with the breakthrough of unmanned operation, intelligent operation, high efficiency of transmission and resources effective utilization etc..
Coal resources account for 70% or more of total fossil fuel, especially at me as tellurian important SOLID MINERAL RESOURCES
The status of state, the coal main body energy will not change within some time.However limited to by solid development of resources, deep ground, residual coal,
It is low to adopt or the exploitation of unworkable coal seam be well solved.In conjunction with energy development situation, solid coal turn of tidal stream state melts
Hair has expanded certain research.Compared with physics and chemical method realize fluidization exploitation solid resource, what biological method needed
Condition milder puts into low, cleaning and long action time, can take into account biological prosthetic, economic benefit and the energy simultaneously
The good method of deposit.Solid coal will be explored on the basis of considering bioanalysis implementation and coal petrography original position particularity herein
Biology in situ fluidization mining system, technique and key technology improve the Exploitation and utilization model in situ that bioanalysis realizes solid coal,
To provide new method and new approaches for comprehensive utilization of energy and green scientific mining.
Invention content
The present invention overcomes the shortcomings of the prior art, technical problem to be solved to be：It provides a kind of
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is：A kind of biology in situ fluidization exploitation solid coal
Method, include the following steps：
Step 1：It determines injecting scheme, carries out tamed strain and fermentation；Exploiting field size is determined simultaneously and section boundary is carried out
Biology blocks；And characteristic design well pattern and deployment well pattern according to coal seam reservoirs；The injecting scheme includes the class for injecting microbial inoculum
Type and corresponding auxiliary process；
Step 2：Production system is arranged in exploiting field, and exploiting field is pre-processed；
Step 3：Microbial inoculum is injected in the injection well for specifying exploiting field, and auxiliary process is combined to carry out biofermentation to coal；Fermentation is same
When monitoring exploiting field in response situation；
Step 4：When reaction speed declines, step 3 is repeated, when product is not further added by, using negative pressure back production fluidization product,
And fluidization product is recycled using negative pressure extraction, into the classification processing of gas-liquid separation, purification or multistage processing；
Step 5：First exploiting field uses high pressure steam sterilization after having adopted, and carries out well net deployment to taking over exploiting field, repeats the above steps.
In the step 2, design well pattern and deployment well pattern specifically include：Determine injection well and recovery well arranged distribution side
Formula, well number number and well spacing array pitch size, then dig injection well and recovery well downwards from ground, wait for ground dig well into
After entering specific absolute altitude, using coal seam thickness as range, using hole creating technology, to coal seam different level construction pore-creating, and along well pattern
Design direction construction duct.
The injection well, recovery well and the setting in duct return nine duct well network designs using a note three or a note four returns 12
Duct well network design.
In the step 2, pretreatment is carried out to exploiting field and is specifically referred to：Hydraulic fracturing, acid are carried out to coal seam reservoirs by well pattern
Change or the processing method of air injection is realized and increases reservoir permeability, oxygen concentration and the purpose for adjusting PH.
In the step 2, the production system includes pretreatment system, injected system, reaction control system, recovery system
It is classified processing system with Poly-generation；The pretreatment system is used for：Adjust injection of the reservoir in order to microorganism；The injection system
System is used for：Realize superior microorganism bacterial strain and activator batch injection reservoir；The reaction control system include visualization device,
Microbiological sensor, gas sensor and pressure sensor, for being monitored simultaneously basis to the biological fermentation process in exploiting field
Monitored results control biodegradation process；The recovery system is for extracting fluidised product, the Poly-generation classification processing
System is for detaching recovery product, being purified and secondary operation.
The present invention has the advantages that compared with prior art：
1）The bioanalysis that the present invention provides realizes the fluidization in situ exploitation of coal, and method is simple and practicable, has and puts into low, green ring
The advantages that protecting, cleaning, and long action time, it is more significant from energy reserves angle.
2）Heretofore described method is not only the good method of low-order coal high-efficiency cleaning exploitation, can be generalized to discarded coal
In layer gas gas well, goaf or tailing.
Description of the drawings
Fig. 1 is the biology in situ fluidization production practice flow chart of solid coal；
Fig. 2 is that a note three returns nine duct well network design schematic diagrames；
Fig. 3 is that a note four returns 12 duct well network design schematic diagrames；
Fig. 4 is the fluidization product of microbial degradation solid coal in the embodiment of the present invention；
Fig. 5 is that implementation result signal is exploited in the biology in situ fluidization of the solid coal of the present invention.
Specific implementation mode
It in order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below will be in the embodiment of the present invention
Technical solution be clearly and completely described, it is clear that described embodiment be the present invention a part of the embodiment, without
It is whole embodiment；Based on the embodiments of the present invention, those of ordinary skill in the art are not before making creative work
The every other embodiment obtained is put, shall fall within the protection scope of the present invention.
As shown in Figure 1, the embodiment of the present invention proposes a kind of utilization complex microbial inoculum ira situ degradation conversion solid coal
Method to realize fluidization exploitation, includes the following steps：
Step 1：It determines injecting scheme and exploiting field size, carries out tamed strain and fermentation, while biology is carried out to section boundary
It blocks, and according to the characteristic of coal seam reservoirs design well pattern and deployment well pattern.
Injecting scheme specifically includes the type of injection microbial inoculum and corresponding auxiliary process；The size in exploiting field can root simultaneously
It is determined according to the propagation distance of strain, biological closure is carried out to section boundary, the biodegradable technique in exploiting field can carried out controllable
Operation.
Planned well net specifically includes：Determine injection well and recovery well arranged distribution mode, the number of well number and well spacing array pitch
Size.
Further, it is also possible to duct is set in exploiting field as needed, and as shown in Fig. 2 ~ 3, the injection well, recovery well and hole
The deployment in road may be used that a note three returns nine duct well network designs and a note four returns 12 duct well network designs, wherein a note three
It refers to that well pattern includes an injection well 1 to return nine duct well network designs, and three recovery wells, 2,9 ducts 8, three 2 wells of recycling are in three
Angular arrangement, injection well 1 are located at triangle center, and nine ducts 8 spread all between all injection wells and recovery well and inject
Between well and outermost duct midpoint；It refers to that well pattern includes an injection well 1 that one note four, which returns 12 duct well network designs, and four are returned
Receive well 2,129 ducts 8, four recovery wells 2 are located at square four angles, and an injection well 1 is located at square center, 12
Duct is located at and spreads all between all injection wells and recovery well and injection well and outermost duct midpoint.
After the completion of well network design, digs injection well 1 downwards from ground and recovery well 2 enters underground coal seam reservoirs, wait for that ground is opened
After sinking shaft enters specific absolute altitude, using coal seam thickness as range, explode using hole creating technology, such as using special cumulative equipment
Trepanning utilizes drilling device trepanning, to coal seam different level construction pore-creating 7, and along well network design direction construction duct 8, hole
Away from coal seam thickness and hardness Design need to be combined to consider, on the one hand duct allows microbial inoculum more fully contact quickening with coal seam reservoirs anti-
Speed is answered, on the other hand hydraulic fracturing technology can also be carried out to coal seam reservoirs by duct, coal bed fracturing and infiltration are completed in acidification
The preprocessing process such as the increase of rate or reservoir oxidation.
Step 2：Production system is arranged in exploiting field, and exploiting field is pre-processed.
Production system includes pretreatment system, injected system, reaction control system, recovery control system and Poly-generation classification
Processing system；The pretreatment system is used for：Injection of the reservoir in order to microorganism is adjusted, water filling, empty gas and water can be such as passed through
Steam or acid solution etc. improve reservoir permeability, oxygen content and pH value；The injected system includes that injection control system and injection are dynamic
Force system, for realizing superior microorganism bacterial strain and activator batch injection coal seam reservoirs；The reaction control system includes setting
Visualization device, microbiological sensor, gas sensor in exploiting field and pressure sensor, for sending out the biology in exploiting field
Ferment process is monitored and controls biodegradation process according to monitored results；The recovery system includes recovery control system and returns
Receive dynamical system, for extracting fluidised product, the Poly-generation classification processing system for being detached to recovery product,
Purification and secondary operation.
The pretreated method in exploiting field is：The technologies such as hydraulic fracturing, acidification or air injection are taken to realize by well pattern and duct
Increase reservoir permeability, oxygen concentration and the purpose for adjusting PH.
Step 3：Microbial fermentation solution is injected, realizes microorganism in situ conversion.
In the injection well that cooperation injection of the microbial inoculum through injection control system and injection dynamical system is specified to exploiting field, and combine
Auxiliary process carries out biofermentation to coal；After a large amount of objective microbe cell reaches predetermined exploiting field response location, periodically examine
Survey total gas production and CO, CO2、H2、CH4, the ingredients such as methanol；Surrouding rock stress and temperature；Liquid pH value and micro- situation；Bacterium
Body breeds situations such as metabolic condition.
As shown in figure 4, the biological decomposition and product for microbial degradation solid coal in the present embodiment form path, Co metabolism
Microbial strains first can convert solid coal to the substances such as long chain alkane, mononuclear aromatics, phenols, benzoic acid, long-chain, then
Organic acid, short chain alkanes, methoxy compound, alcohols and phenol, further the zymophyte the effects that under, finally convert coal into
The fluidization product of the gaseous states such as humic acid, hydrogen, methanol, acetic acid or liquid.The Bioliquefication of comprehensive coal and gasification, recycle fluidised form
It is simple and practicable to change product.
The first step that injection microbial fermentation solution converts initiating microorganism in situ.During this, thalline can pass through
High-pressure fluid is loaded into coal seam, can be approximately considered transmission of the particle stream in porous media, this process needs concern, considers
It is with quantization：The microorganism metabolic rule under formation condition in situ；The model involved in porous media similar to particle stream
It encloses；Zymotic fluid is adsorbed in the porous media of coal body, is deposited, aggregate performance is to be detained, and duct is caused to block the reservoir damage generated
Wound etc..After a large amount of objective microbe cell reaches predetermined response location, start that a series of biochemistry occurs by substrate of coal
Reaction, as thalline is bred, molten coal constantly widens increasing, target product is built up reaction surface, and creep fluidisation, stream occur for coal body
To extraction well.For degradation reaction phases-time because of strains for degrading process and period difference, the process strains for degrading coal is new to generate
Cell maintains own metabolism and forms complicated gas-liquid two-phase metabolite, and the permeability in the stage bred, is degraded and crustal stress
Multiple action concussion variation.
Step 4：Reaction product is recycled, and carries out extraction separation.
When reaction speed declines, repeats step 3 and pass through recovery control system back production fluidised form when product is not further added by
Change product, and using negative pressure extraction recycle fluidization product, by Poly-generation be classified processing system carry out gas-liquid separation, purification or
The classification process flow of multistage processing, extracts CH4、H2, methanol/ethanol, the products such as humic acid.
Extracting separation is defeated to fluid product separation, purifying sum aggregate, realizes the important link of commercial Application.When target thalline
After it experienced the sufficiently long degradation reaction time, it is believed that bacterium all consumes available coal, strain can not survive or
Self-dissolving occurs for breeding.The coal after fluidization is recycled using negative pressure extraction, into knockout drum, and realizes industrial value.
Step 5：First exploiting field uses high pressure steam sterilization after having adopted, and carries out well net deployment to taking over exploiting field, repeats above-mentioned step
Suddenly.
As shown in figure 5, implementation result schematic diagram is exploited in the biology in situ fluidization for the solid coal of the present embodiment.Tame tank
4 are used for domesticated strain, and fermentation tank 3 is used for fermenting microbe, and the strain after domestication and fermentation is dynamic through injection control system 5 and injection
Force system 6 fits into injection well 1, and enters inside coal seam reservoirs along injection well 1, pore-forming 7 and duct 8 and dropped with solid coal
Solution is reacted, and in figure, 9 indicate microbial inoculums, and 10 indicate the coal seam between ducts, and 11 indicate the coal with microbial inoculum generation bio-degradation reactions
Layer is coordinated by the fluid product of remaining years after degradation reaction by recycling dynamical system 12 and recovery control system 13, lifting stream
Body product is by duct 8 and pore-forming 7, by recovery well 2, into knockout drum 14, is classified processing system by Poly-generation and is divided
From, purifying and transporting something containerized realize industrial applicability.
Finally it should be noted that：The above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Present invention has been described in detail with reference to the aforementioned embodiments for pipe, it will be understood by those of ordinary skill in the art that：Its according to
So can with technical scheme described in the above embodiments is modified, either to which part or all technical features into
Row equivalent replacement；And these modifications or replacements, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (5)
1. a kind of method of biology in situ fluidization exploitation solid coal, which is characterized in that include the following steps：
Step 1：It determines injecting scheme, carries out tamed strain and fermentation；Exploiting field size is determined simultaneously and section boundary is carried out
Biology blocks；And characteristic design well pattern and deployment well pattern according to coal seam reservoirs；The injecting scheme includes the class for injecting microbial inoculum
Type and corresponding auxiliary process；
Step 2：Production system is arranged in exploiting field, and exploiting field is pre-processed；
Step 3：Microbial inoculum is injected in the injection well for specifying exploiting field, and auxiliary process is combined to carry out biofermentation to coal；Fermentation is same
When monitoring exploiting field in response situation；
Step 4：When reaction speed declines, step 3 is repeated, when product is not further added by, using negative pressure back production fluidization product,
And fluidization product is recycled using negative pressure extraction, into the classification processing of gas-liquid separation, purification or multistage processing；
Step 5：First exploiting field uses high pressure steam sterilization after having adopted, and carries out well net deployment to taking over exploiting field, repeats the above steps.
2. a kind of method of biology in situ fluidization exploitation solid coal according to claim 1, which is characterized in that the step
In rapid 2, design well pattern and deployment well pattern specifically include：Determine injection well and recovery well arranged distribution mode, the number of well number and
The size of well spacing array pitch, then digs injection well and recovery well downwards from ground, after after ground, cutting well enters specific absolute altitude, with
Coal seam thickness is range, using hole creating technology, to coal seam different level construction pore-creating, and along well network design direction construction hole
Road.
3. a kind of method of biology in situ fluidization exploitation solid coal according to claim 2, which is characterized in that the note
Enter well, recovery well and nine duct well network designs is returned using a note three with the setting in duct or a note four returns 12 duct well patterns and sets
Meter.
4. a kind of method of biology in situ fluidization exploitation solid coal according to claim 1, which is characterized in that the step
In rapid 2, pretreatment is carried out to exploiting field and is specifically referred to：By well pattern coal seam reservoirs are carried out with the place of hydraulic fracturing, acidification or air injection
Reason method, which is realized, increases reservoir permeability, oxygen concentration and the purpose for adjusting PH.
5. a kind of method of biology in situ fluidization exploitation solid coal according to claim 1, which is characterized in that the step
In rapid 2, the production system includes at pretreatment system, injected system, reaction control system, recovery system and Poly-generation classification
Reason system；The pretreatment system is used for：Adjust injection of the reservoir in order to microorganism；The injected system is used for：It realizes excellent
Gesture microbial strains and activator batch injection reservoir；The reaction control system include visualization device, microbiological sensor,
Gas sensor and pressure sensor are given birth to for being monitored to the biological fermentation process in exploiting field and being controlled according to monitored results
Object degradation process；The recovery system is used for for extracting fluidised product, the Poly-generation classification processing system to recycling
Product detached, is purified and secondary operation.
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| CN201810392141.0A CN108708692A (en) | 2018-04-27 | 2018-04-27 | A kind of method of biology in situ fluidization exploitation solid coal |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113669045A (en) * | 2021-09-29 | 2021-11-19 | 中国石油大学(北京) | Method and processor for in-situ conversion between same-well sections of coal bed horizontal well |
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| CN101922287A (en) * | 2010-07-21 | 2010-12-22 | 肖栋 | Method for making natural gas by underground coal bed microorganism |
| CN102900411A (en) * | 2012-10-29 | 2013-01-30 | 河南理工大学 | Biological permeability-increasing method for coal reservoir |
| US20170137790A1 (en) * | 2014-12-04 | 2017-05-18 | Baker Hughes Incorporated | Enzymes for removing sulfurous compounds in downhole fluids |
| CN107387043A (en) * | 2017-08-14 | 2017-11-24 | 西南石油大学 | A kind of method that spontaneous multicomponent gas displacement in coal seam improves coal bed gas recovery ratio |
-
2018
- 2018-04-27 CN CN201810392141.0A patent/CN108708692A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101922287A (en) * | 2010-07-21 | 2010-12-22 | 肖栋 | Method for making natural gas by underground coal bed microorganism |
| CN102900411A (en) * | 2012-10-29 | 2013-01-30 | 河南理工大学 | Biological permeability-increasing method for coal reservoir |
| US20170137790A1 (en) * | 2014-12-04 | 2017-05-18 | Baker Hughes Incorporated | Enzymes for removing sulfurous compounds in downhole fluids |
| CN107387043A (en) * | 2017-08-14 | 2017-11-24 | 西南石油大学 | A kind of method that spontaneous multicomponent gas displacement in coal seam improves coal bed gas recovery ratio |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113669045A (en) * | 2021-09-29 | 2021-11-19 | 中国石油大学(北京) | Method and processor for in-situ conversion between same-well sections of coal bed horizontal well |
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