CN107152266A - Improve the method and its application of the biogasification speed of oil reservoir residual oil - Google Patents
Improve the method and its application of the biogasification speed of oil reservoir residual oil Download PDFInfo
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- CN107152266A CN107152266A CN201610122219.8A CN201610122219A CN107152266A CN 107152266 A CN107152266 A CN 107152266A CN 201610122219 A CN201610122219 A CN 201610122219A CN 107152266 A CN107152266 A CN 107152266A
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- 238000000034 method Methods 0.000 title claims abstract description 28
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 43
- 239000012190 activator Substances 0.000 claims abstract description 15
- 238000004519 manufacturing process Methods 0.000 claims abstract description 9
- 241000894006 Bacteria Species 0.000 claims abstract description 8
- 238000006073 displacement reaction Methods 0.000 claims abstract description 6
- 239000007788 liquid Substances 0.000 claims abstract description 6
- 239000007864 aqueous solution Substances 0.000 claims abstract description 5
- 230000004060 metabolic process Effects 0.000 claims abstract description 5
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 claims description 8
- 244000005700 microbiome Species 0.000 claims description 8
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 7
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 7
- 239000005864 Sulphur Substances 0.000 claims description 7
- 238000005516 engineering process Methods 0.000 claims description 7
- 229910052757 nitrogen Inorganic materials 0.000 claims description 7
- 229910052698 phosphorus Inorganic materials 0.000 claims description 7
- 239000011574 phosphorus Substances 0.000 claims description 7
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims description 5
- 239000005416 organic matter Substances 0.000 claims description 5
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 4
- ZPWVASYFFYYZEW-UHFFFAOYSA-L dipotassium hydrogen phosphate Chemical compound [K+].[K+].OP([O-])([O-])=O ZPWVASYFFYYZEW-UHFFFAOYSA-L 0.000 claims description 4
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 229910052943 magnesium sulfate Inorganic materials 0.000 claims description 4
- 235000019341 magnesium sulphate Nutrition 0.000 claims description 4
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 claims description 4
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 claims description 4
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 3
- 235000019270 ammonium chloride Nutrition 0.000 claims description 3
- 235000015278 beef Nutrition 0.000 claims description 3
- 239000004202 carbamide Substances 0.000 claims description 3
- 239000000284 extract Substances 0.000 claims description 3
- 239000012138 yeast extract Substances 0.000 claims description 3
- 239000001888 Peptone Substances 0.000 claims description 2
- 108010080698 Peptones Proteins 0.000 claims description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 2
- 229940041514 candida albicans extract Drugs 0.000 claims description 2
- BNIILDVGGAEEIG-UHFFFAOYSA-L disodium hydrogen phosphate Chemical compound [Na+].[Na+].OP([O-])([O-])=O BNIILDVGGAEEIG-UHFFFAOYSA-L 0.000 claims description 2
- 229910000402 monopotassium phosphate Inorganic materials 0.000 claims description 2
- 235000019796 monopotassium phosphate Nutrition 0.000 claims description 2
- 229910000403 monosodium phosphate Inorganic materials 0.000 claims description 2
- 235000019799 monosodium phosphate Nutrition 0.000 claims description 2
- 239000001301 oxygen Substances 0.000 claims description 2
- 229910052760 oxygen Inorganic materials 0.000 claims description 2
- 235000019319 peptone Nutrition 0.000 claims description 2
- PJNZPQUBCPKICU-UHFFFAOYSA-N phosphoric acid;potassium Chemical compound [K].OP(O)(O)=O PJNZPQUBCPKICU-UHFFFAOYSA-N 0.000 claims description 2
- 239000011148 porous material Substances 0.000 claims description 2
- 239000004323 potassium nitrate Substances 0.000 claims description 2
- 235000010333 potassium nitrate Nutrition 0.000 claims description 2
- OTYBMLCTZGSZBG-UHFFFAOYSA-L potassium sulfate Chemical compound [K+].[K+].[O-]S([O-])(=O)=O OTYBMLCTZGSZBG-UHFFFAOYSA-L 0.000 claims description 2
- 229910052939 potassium sulfate Inorganic materials 0.000 claims description 2
- 235000011151 potassium sulphates Nutrition 0.000 claims description 2
- AJPJDKMHJJGVTQ-UHFFFAOYSA-M sodium dihydrogen phosphate Chemical compound [Na+].OP(O)([O-])=O AJPJDKMHJJGVTQ-UHFFFAOYSA-M 0.000 claims description 2
- 239000004317 sodium nitrate Substances 0.000 claims description 2
- 235000010344 sodium nitrate Nutrition 0.000 claims description 2
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 2
- 235000011152 sodium sulphate Nutrition 0.000 claims description 2
- 239000002305 electric material Substances 0.000 claims 1
- 238000003306 harvesting Methods 0.000 claims 1
- 239000003921 oil Substances 0.000 description 38
- 238000006243 chemical reaction Methods 0.000 description 11
- 229930195733 hydrocarbon Natural products 0.000 description 11
- 238000006731 degradation reaction Methods 0.000 description 10
- 150000002430 hydrocarbons Chemical class 0.000 description 10
- 230000015556 catabolic process Effects 0.000 description 9
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 7
- 239000004215 Carbon black (E152) Substances 0.000 description 6
- 239000004020 conductor Substances 0.000 description 5
- 239000003345 natural gas Substances 0.000 description 5
- 239000007789 gas Substances 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000005868 electrolysis reaction Methods 0.000 description 3
- 230000000813 microbial effect Effects 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000006555 catalytic reaction Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000010779 crude oil Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 239000006004 Quartz sand Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 235000013877 carbamide Nutrition 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000002906 microbiologic effect Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/58—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
- E21B43/267—Methods for stimulating production by forming crevices or fractures reinforcing fractures by propping
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Chemical & Material Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Immobilizing And Processing Of Enzymes And Microorganisms (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
- Micro-Organisms Or Cultivation Processes Thereof (AREA)
- Preparation Of Compounds By Using Micro-Organisms (AREA)
Abstract
The present invention relates to a kind of method for the biogasification speed for improving oil reservoir residual oil, comprise the following steps：1) electrode is constructed in oil reservoir；2) aqueous solution of anaerobe activator is injected into oil reservoir；3) apply voltage to form electric microfield in oil reservoir by electrode, to stimulate methanogen and its syntrophism to be metabolized propagation and the metabolism of bacterium；4) stop applying voltage, inject liquid, aqueous into oil reservoir, methanogen and its syntrophism are metabolized bacterium displacement to earth formation deep；5) opening well and making production methane.The invention further relates to its application.
Description
Technical field
The present invention relates to a kind of method for improving speed, more particularly to a kind of side for the speed for improving oil reservoir field
Method.The invention further relates to its application.
Background technology
Fast development and Energy restructuring with Chinese national economy, China's energy demand are increasingly vigorous, supply
Contradiction is needed to increasingly sharpen：Ended for the end of the year 2014, China's oil, natural gas a year import volume respectively reach 3.1 hundred million tons
With 457 billion cubic meters, external dependence degree is respectively 59.6% and 25.6%.At present, the oil production of China 80%
Waterflooding development oil reservoir can be come from, onshore oil field generally enters high water-cut stage, and (sinopec, petrochina have 47.3% respectively
Enter ultra-high water cut stage with 43.5% mining-employed reserves), calculated according to reserve-production ratio 16.85, coming 10 years,
China oil field will enter water drive abandonment stage on a large scale.However, under existing oil recovery technique level, oil reservoir is overall
Recovery ratio still has the oily preservation underground of abundant residues can not economy, effective exploitation also than relatively low (＜ 40%).
Oil reservoir residual oil biogasification technology is the important perspective study problem of current international the next item up, the technology
A beneficial technical thought is provided for the Efficient Development of low-grade petroleum resources, American-European flourishing state has been subjected to
The extensive attention and concern of family.Oil reservoir residual oil biogasification technology refer to by activate reservoir endogenous micro-organisms or
Inoculating microbe is introduced, " syntrophism is metabolized bacterium-methane backeria " microbiologic population is formed in the earth formation, residual oil is passed through
Anaerobic degradation effect transforms into natural gas (methane), so that residual oil be produced in the form of natural gas；Or
Person, supplements oil reservoir energy, so as to increase substantially the utilization ratio and production of water of petroleum resources by biogasification
It is flat.
However, the initial action of the anaerobism alkane degradation of hydrocarbons --- hydrocarbon substrate anaerobic degradation hydrogenesis and acetogenesis is anti-
Should, its gibbs free energy change amount is just (need to feed energy) from the external world, i.e. reaction spontaneous can not be carried out,
Microorganism must seize additional energy by modes such as extracellular electron transmissions, therefore, hydrocarbon anaerobic degradation reaction rate
Largely limited by these courses of reaction, cause hydro carbons microbial degradation aerogenesis speed under anaerobic condition non-
Often slow, the biodegradable of oil needs the time scale of 1000000 years under natural conditions, and such reaction speed exists
Extensive gas accumulation is not likely to form in short time, although artificial activation's method can improve residual to a certain degree
Excess oil methane phase speed, but converted according to the conversion rate reported at present, gas production rate can not still be met
The requirement of extensive gas reservoir development.
The content of the invention
In order to solve above-mentioned problems of the prior art, the invention provides a kind of raising oil reservoir residual oil
The method of biogasification speed.The method of the present invention strengthens intercellular electron transport by microorganism electrolysis cell system
The energy supply that electric energy is reacted hydrocarbons anaerobic degradation is realized, the reaction heating power of microorganism catalysis process is broken through
Limitation is learned, the lifting of residual oil anaerobic degradation methane phase reaction rate is realized.
In an embodiment of the invention, the invention provides a kind of biogasification for improving oil reservoir residual oil
The method of speed, comprises the following steps：
1) electrode is constructed in oil reservoir；
2) aqueous solution of anaerobe activator is injected into oil reservoir；
3) apply voltage to form electric microfield in oil reservoir by electrode, to stimulate methanogen and its syntrophism generation
Thank to propagation and the metabolism of bacterium；
4) stop applying voltage, liquid, aqueous, preferred water is injected into oil reservoir, by methanogen and its is mutual
Battalion is metabolized bacterium displacement to earth formation deep；
5) opening well and making production methane.
One of the present invention preferred embodiment in, above-mentioned steps 1) to 5) can be with feasible in logic
Random order carry out, preferably according to from step 1) to step 5) carry out successively.
Microorganism electrolysis cell technology is creatively introduced Biogeochemistry and oil-gas field development etc. by the present invention should
With field, efficient extracellular electron transmission and the external source energy in hydrocarbon anaerobic degradation rate-limiting reaction are realized using electric microfield
Amount supply, significantly lifts hydrocarbon anaerobic degradation methane phase speed.Under the male/female pole combination of microorganism electrolysis cell, hydrocarbon is detested
" thermodynamics of reactions-electrochemistry " mechanism of oxygen degraded methane phase is as follows：
1. anode reaction (syntrophism metabolism bacterium be main body)
Crude oil+H2O→CH3COOH+H++e-
CH3COOH→CH4+CO2
2. cathode reaction (methanogen is main body)
CO2+H++e-→CH4+H2O
3. general reaction
Crude oil+H2O→CH4+CO2
The present invention by electric microfield to energy is fed during living things catalysis, in living things catalysis-electrochemistry synergy
The reaction rate of anaerobic degradation methane phase of the lower raising using hydrocarbon as substrate.The present invention is converted electrical energy into by electric microfield
For biochemistry energy, the bio-energy limitation of hydro carbons anaerobic methane production process is breached, anaerobic methane production is improved
Reaction efficiency.
In the present invention, term " methanogen " refers to the microbe groups of methane phase, especially with acetic acid point
The microbe groups of solution or carbon dioxide-hydrogen reducing mode methane phase.In the present invention, methanogen is " mutual
Battalion metabolism bacterium " refers to grow under the conditions of strictly anaerobic, energy when with consumption hydrogen microorganism (methanogen) syntrophism
A quasi-microorganism of hydro carbons substrate in degraded oil.
In the present invention, term " displacement " refers to have liquid to oil reservoir by injecting in liquid, driving oil reservoir
Move in deep.
One of the present invention preferred embodiment in, by step 1) to 5) being repeated twice or more than twice.
One of the present invention preferred embodiment in, step 1) described in electrode using including hydraulic fracturing
The method of technology is constructed.
The present invention one preferred embodiment in, the electrode be using conductive material prepare support
Agent.This preferred embodiment in, prepare proppant using using conductive material, then shaft bottom connection lead
Line is to dc source, so as to build electrode.The conventional proppant in this area should be that supporting crack is used, typically all
It is haydite or quartz sand, and the preferred embodiment middle use conductive material of the present invention prepares proppant, its
It is both proppant and electrode, serves the especially good technique effect of one double-purpose.
The present invention one preferred embodiment in, step 2) injection anaerobe activator amount be
V ± 10%, wherein V are calculated by equation below：
Wherein, L represents the radius length of hydraulically created fracture, and h represents that the seam of hydraulically created fracture is high, w tables
Show the slit width of hydraulically created fracture, φ represents reservoir pore degree.
The present invention one preferred embodiment in, step 2) described in anaerobe activator include
Nitrogen source, phosphorus source, sulphur source and organic matter.It is furthermore preferred that in every liter of step 2) described in anaerobe swash
In the aqueous solution of agent living, the anaerobe activator include 0.5-1.0g nitrogen sources, 0.2-0.5g phosphorus sources,
0.05-0.10g sulphur sources and 0.01-0.05g organic matters.
The present invention one preferred embodiment in, extraction of the anaerobe activator after handling
The one or more that liquid or clear water are added in nitrogen source, phosphorus source, sulphur source and/or organic matter are formulated.
The present invention one preferred embodiment in, the nitrogen source include ammonium chloride, urea, potassium nitrate and
One or more in sodium nitrate.
The present invention one preferred embodiment in, phosphorus source include potassium dihydrogen phosphate, dipotassium hydrogen phosphate,
One or more in sodium dihydrogen phosphate and disodium hydrogen phosphate.
The present invention one preferred embodiment in, the sulphur source include potassium sulfate, sodium sulphate and magnesium sulfate
In one or more.
The present invention one preferred embodiment in, the organic matter include yeast extract, beef extract and egg
One or more in white peptone.
One of the present invention preferred embodiment in, step 3) voltage strength of the voltage is
0.10-1.50V。
One of the present invention preferred embodiment in, the field strength of the electric microfield is 0.001-0.05V/m.
One of the present invention preferred embodiment in, step 3) described in apply the alive duration and be
30-90 days, preferably 60-80 days.
The remaining oil yield of oil reservoir and/or recovery ratio are being improved it is a further object of the invention to provide the above method
The application of aspect.
The beneficial effects of the present invention are：The method of the present invention can greatly promote the biogasification of oil reservoir residual oil
Speed, and save the energy, environmental protection.
Brief description of the drawings
Fig. 1 is that, using each section of pressure-break face in many staged fracturing horizontal wells as electrode, multistage seam face combines to form oil
The schematic diagram of electric microfield in hiding.Wherein, arrow represents the fracture extension direction of proppant during pressure break.
Embodiment
With reference to non-limiting specific embodiment, the invention will be further described, but the protection model of the present invention
Enclose and be not limited to following embodiments.
Embodiment 1：
Henan Oil Field block depleted reservoirs, implement many staged fracturings of horizontal well, 8 sections of pressure break hop count, to every
Injection about 50m in section (100 meters of dummy joint length stitches high 30 meters, 10 millimeters of slit width, porosity 50%)3Swash
Agent living, injects activator 400m altogether3, activator composition for 0.5g/L urea, 0.25g/L dipotassium hydrogen phosphates,
0.05g/L magnesium sulfate and 0.01g/L yeast extracts.Water conservancy pressure is carried out using the proppant prepared by conductive material
Split, then in shaft bottom connecting wire to dc source, so as to construct electrode.Setting adjacent segment be respectively anode and
Negative electrode, setting anode voltage is -0.20V vs. reference electrodes voltages (NHE), and cathode voltage is joined for -0.35V vs.
It is 90 days making alive time, rear to stop applying voltage than electrode voltage (NHE), use 4000m3Water is carried out
Displacement, vexed well is after 180 days, and natural gas primiparity is 40,000 sides/day after driving a well.
Embodiment 2：
Jiangsu oilfield block depleted reservoirs, implement individual well staged fracturing, 2 sections of pressure break hop count, target reservoir
It is shallower, it is horizontal joint.To every section (80 meters of dummy joint length stitches high 40 meters, 6 millimeters of slit width, porosity 50%)
Interior injection about 30m3Activator, injects activator 60m altogether3, activator composition is 0.8g/L ammonium chlorides, 0.50g/L
Dipotassium hydrogen phosphate, 0.08g/L magnesium sulfate and 0.01g/L beef extracts.Using the proppant prepared by conductive material come
Water conservancy pressure break is carried out, then in shaft bottom connecting wire to dc source, so as to construct electrode.Set adjacent segment point
Not Wei anode and negative electrode, setting anode voltage be -0.15V vs.NHE, cathode voltage be -0.40V vs.NHE,
It is 60 days making alive time, rear to stop applying voltage, use 800m3Water carries out displacement, and vexed well is after 150 days,
Natural gas primiparity is 1.6 ten thousand sides/day after driving a well.
Comparative example 1
Henan Oil Field block depleted reservoirs as described in Example 1 without processing as described in example 1 above it
Before (i.e. in the case of electrodeless and electric microfield), do not observe that the methane of any microbial source is produced.
Comparative example 2
Jiangsu oilfield block depleted reservoirs as described in Example 2 without processing as described in example 2 above it
Before (i.e. in the case of electrodeless and electric microfield), do not observe that the methane of any microbial source is produced.
It should be noted that embodiment described above is only used for explaining the present invention, do not constitute to the present invention's
Any limitation.By referring to exemplary embodiments, invention has been described, it should be appreciated that wherein used
Word is descriptive and explanatory vocabulary, rather than limited vocabulary.Can be by regulation in the claims in the present invention
In the range of the present invention is modified, and in without departing substantially from scope and spirit of the present invention to the present invention progress
Revision.Although the present invention described in it is related to specific method, material and embodiment, it is not intended that
The present invention is limited to wherein disclosed particular case, on the contrary, to can be extended to other all with identical function by the present invention
Methods and applications.
Claims (10)
1. a kind of method for the biogasification speed for improving oil reservoir residual oil, comprises the following steps：
1) electrode is constructed in oil reservoir；
2) aqueous solution of anaerobe activator is injected into oil reservoir；
3) apply voltage to form electric microfield in oil reservoir by electrode, to stimulate methanogen and its syntrophism generation
Thank to propagation and the metabolism of bacterium；
4) stop applying voltage, liquid, aqueous, preferred water is injected into oil reservoir, by methanogen and its is mutual
Battalion is metabolized bacterium displacement to earth formation deep；
5) opening well and making production methane.
2. according to the method described in claim 1, it is characterised in that by step 1) to 5) being repeated twice or
More than twice.
3. method according to claim 1 or 2, it is characterised in that step 1) described in electrode use
Method including hydraulic fracturing technology is constructed.
4. the method according to any one of claim 1-3, it is characterised in that the electrode is to use to lead
Proppant prepared by electric material.
5. the method according to any one of claim 1-4, it is characterised in that step 2) injection anaerobism
The amount of microorganism activator is V ± 10%, and wherein V is calculated by equation below：
Wherein, L represents the radius length of hydraulically created fracture, and h represents that the seam of hydraulically created fracture is high, w tables
Show the slit width of hydraulically created fracture, φ represents reservoir pore degree.
6. the method according to any one of claim 1-5, it is characterised in that step 2) described in detest
Oxygen animalcule activator includes nitrogen source, phosphorus source, sulphur source and organic matter；
It is preferred that, in every liter of step 2) described in anaerobe activator the aqueous solution in, the anaerobism is micro-
Bio-stimulant, which includes 0.5-1.0g nitrogen sources, 0.2-0.5g phosphorus sources, 0.05-0.10g sulphur sources and 0.01-0.05g, to be had
Machine thing.
7. method according to claim 6, it is characterised in that the nitrogen source include ammonium chloride, urea,
One or more in potassium nitrate and sodium nitrate；
Phosphorus source includes one kind in potassium dihydrogen phosphate, dipotassium hydrogen phosphate, sodium dihydrogen phosphate and disodium hydrogen phosphate
Or it is a variety of；
The sulphur source includes the one or more in potassium sulfate, sodium sulphate and magnesium sulfate；
The organic matter includes the one or more in yeast extract, beef extract and peptone.
8. the method according to any one of claim 1-7, it is characterised in that step 3) voltage
Voltage strength be 0.10-1.50V.
9. the method according to any one of claim 1-8, it is characterised in that the field strength of the electric microfield
For 0.01-0.05V/m.
10. the method according to any one of claim 1-9 is improving the remaining oil yield of oil reservoir and/or harvesting
Application in terms of rate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610122219.8A CN107152266B (en) | 2016-03-03 | 2016-03-03 | Method for improving biogasification rate of residual oil in oil reservoir and application of method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610122219.8A CN107152266B (en) | 2016-03-03 | 2016-03-03 | Method for improving biogasification rate of residual oil in oil reservoir and application of method |
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| Publication Number | Publication Date |
|---|---|
| CN107152266A true CN107152266A (en) | 2017-09-12 |
| CN107152266B CN107152266B (en) | 2020-05-15 |
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| CN201610122219.8A Active CN107152266B (en) | 2016-03-03 | 2016-03-03 | Method for improving biogasification rate of residual oil in oil reservoir and application of method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110259423A (en) * | 2019-06-06 | 2019-09-20 | 太原理工大学 | A kind of applying direct current electric field combines the method for volume increase coal bed gas with microbial degradation |
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