CN105927186B - A kind of method that high temperature and high salt high-content wax oil well compound throughput recovers the oil - Google Patents
A kind of method that high temperature and high salt high-content wax oil well compound throughput recovers the oil Download PDFInfo
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- CN105927186B CN105927186B CN201610275240.1A CN201610275240A CN105927186B CN 105927186 B CN105927186 B CN 105927186B CN 201610275240 A CN201610275240 A CN 201610275240A CN 105927186 B CN105927186 B CN 105927186B
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- 239000003129 oil well Substances 0.000 title claims abstract description 72
- 238000000034 method Methods 0.000 title claims abstract description 45
- 150000003839 salts Chemical class 0.000 title claims abstract description 16
- 150000001875 compounds Chemical class 0.000 title claims abstract description 11
- 239000001993 wax Substances 0.000 claims abstract description 92
- 238000004519 manufacturing process Methods 0.000 claims abstract description 30
- 239000012188 paraffin wax Substances 0.000 claims abstract description 29
- 238000012360 testing method Methods 0.000 claims abstract description 21
- 230000000638 stimulation Effects 0.000 claims abstract description 18
- 238000012216 screening Methods 0.000 claims abstract description 14
- 230000008569 process Effects 0.000 claims abstract description 7
- 239000003795 chemical substances by application Substances 0.000 claims description 61
- 239000012530 fluid Substances 0.000 claims description 46
- 239000007924 injection Substances 0.000 claims description 38
- 238000002347 injection Methods 0.000 claims description 38
- 239000003921 oil Substances 0.000 claims description 36
- 235000019198 oils Nutrition 0.000 claims description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 25
- 230000000813 microbial effect Effects 0.000 claims description 22
- 238000006073 displacement reaction Methods 0.000 claims description 19
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 15
- 235000019774 Rice Bran oil Nutrition 0.000 claims description 9
- 239000008165 rice bran oil Substances 0.000 claims description 9
- 239000008398 formation water Substances 0.000 claims description 8
- 230000035699 permeability Effects 0.000 claims description 7
- 239000003570 air Substances 0.000 claims description 6
- 238000002474 experimental method Methods 0.000 claims description 6
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 claims description 5
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 claims description 5
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 claims description 5
- 241000894006 Bacteria Species 0.000 claims description 5
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 claims description 5
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 claims description 5
- 239000005642 Oleic acid Substances 0.000 claims description 5
- 239000001888 Peptone Substances 0.000 claims description 5
- 108010080698 Peptones Proteins 0.000 claims description 5
- 239000002253 acid Substances 0.000 claims description 5
- 125000001931 aliphatic group Chemical group 0.000 claims description 5
- 230000015556 catabolic process Effects 0.000 claims description 5
- 238000006731 degradation reaction Methods 0.000 claims description 5
- ZPWVASYFFYYZEW-UHFFFAOYSA-L dipotassium hydrogen phosphate Chemical compound [K+].[K+].OP([O-])([O-])=O ZPWVASYFFYYZEW-UHFFFAOYSA-L 0.000 claims description 5
- 150000002191 fatty alcohols Chemical class 0.000 claims description 5
- 239000008103 glucose Substances 0.000 claims description 5
- 125000004836 hexamethylene group Chemical group [H]C([H])([*:2])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[*:1] 0.000 claims description 5
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 claims description 5
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 claims description 5
- 235000019319 peptone Nutrition 0.000 claims description 5
- 239000003209 petroleum derivative Substances 0.000 claims description 5
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 5
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 5
- 239000004094 surface-active agent Substances 0.000 claims description 5
- 235000016709 nutrition Nutrition 0.000 claims description 4
- 230000008021 deposition Effects 0.000 abstract description 8
- 238000011084 recovery Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 4
- 239000010779 crude oil Substances 0.000 description 10
- 239000000203 mixture Substances 0.000 description 7
- 238000005406 washing Methods 0.000 description 4
- 238000010793 Steam injection (oil industry) Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 244000005700 microbiome Species 0.000 description 3
- 238000009738 saturating Methods 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 238000000605 extraction Methods 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000003112 inhibitor Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000010795 Steam Flooding Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000013332 literature search Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Classifications
-
- 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
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
- E21B37/06—Methods or apparatus for cleaning boreholes or wells using chemical means for preventing, limiting or eliminating the deposition of paraffins or like substances
-
- 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
- C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
- C09K8/524—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning organic depositions, e.g. paraffins or asphaltenes
-
- 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
- E21B43/164—Injecting CO2 or carbonated water
-
- 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
- E21B43/20—Displacing by water
Abstract
The invention belongs to technical field of tertiary oil recovery, and in particular to a kind of method that high temperature and high salt high-content wax oil well compound throughput recovers the oil, this method specifically include following steps：Test oil well screening；Single well stimulation process choice；Field test.The present invention has the characteristics that simple technique, specific aim and the term of validity are long；Meanwhile the present invention not only can effectively control the wax deposition of high temperature and high salt oil well, and with the effect for increasing oil.Therefore, in the technique increased production present invention is generally applicable to the Paraffin Removal and individual well of Waxy Production Wells.
Description
Technical field
The present invention relates to a kind of method of tertiary oil recovery, more particularly to a kind of high temperature and high salt high-content wax oil well compound throughput
The method of oil recovery.
Background technology
The immanent cause of oil well paraffinication is the crude oil content of wax, and wax content is more, and wax deposition is more serious.Under reservoir condition, by
High in medium temperature, wax is dissolved in crude oil, when crude oil is from oil reservoir access wall bottom, then the process of well head is risen to from shaft bottom
In, due to the reduction of pressure and temp, solubility of the wax in crude oil is reduced and separated out.
The wax being dissolved in in-place oil, can be with the reduction of temperature and pressure, gradually from crude oil in recovery process
Separate out, crystallize and be deposited on oil pipe surface, cause oil pipe surface wax deposition.
Oil well paraffinication can influence normally to produce, therefore control and remove of well paraffin is also problem to be solved in recovering the oil.Often at present
Method has hot wash wax control, mechanical wax control and paraffin control with inhibitor.Hot wash wax control mode is when formation pressure is relatively low, a large amount of well-flushing waters
Clay swell can be caused into stratum, oil reservoir is blocked, stratum can be also polluted, in addition, heating power wax removal also results in flushing fluid
Pour in down a chimney phenomenon, influence normally to produce.During hot-washing wax remover, radiation loss of the heat on pit shaft is larger, also results in pit shaft
The wax of bottom is difficult to clean off；Mechanical wax control is big with labor intensity, and energy consumption is also larger, and cost is higher；Paraffin control with inhibitor has
The shortcomings that term of validity is short, of high cost and safety and environmental protection performance is poor；Meanwhile the above method can only solve asking for well wellbore wax deposition
Topic.
Pass through literature search, the patent No. " ZL03156478.x ", the entitled " side of Wax-bearing low-seepage oil deposit steam injection heating recovery
The shortcomings that method that method " describes the exploitation content of wax low-permeability oil deposit that a kind of steam soak and steam drive is combined, the invention, exists
In：（1）Heat extraction by steam injection is of high cost, and risk is big；（2）The corrosion of tubing string and maintenance cost are high；（3）Since low-permeability oil deposit permeates
Rate is low, the poor fluidity of crude oil, and the amplitude that heat extraction by steam injection improves recovery ratio is low, and effect is limited；（4）To the alternative condition of oil reservoir
Compare harsh, the requirement especially to reservoir thickness and depth is higher.
The content of the invention
The purpose of the present invention is provide a kind of high temperature and high salt high-content wax oil well compound throughput in view of the deficiencies of the prior art
The method of oil recovery.This method can not only play the role of the Paraffin Removal of oil well, and can effectively improve oily well yield, have at the same time
There is the characteristics of term of validity length and high input-output ratio.
The method that a kind of high temperature and high salt high-content wax oil well compound throughput provided by the invention recovers the oil, it is characterised in that the party
Method specifically includes following steps：
1st, oil well screening is tested
90 DEG C of oil well screening criteria reservoir temperature ＜, paraffin content ＜ 40%, formation water salinity ＜ 100000mg/L, infiltration
Rate ＞ 100 × 10-3μm2It is more than 2m with core intersection.
2nd, single well stimulation process choice
Oil well single well stimulation technique is as follows：
Emulsion-type Wax removing agent is injected first from the oil jacket annular space of oil well, closing well 3- after emulsion-type Wax removing agent has been noted
5d；Microbial wax control agent, air and water flooding displacement fluid are implanted sequentially after closed-in time, after water flooding displacement fluid has been noted
Closing well 15-20d；After closed-in time, oil well opening well and making production, the daily fluid production rate of the 1st month is 1/ of daily fluid production rate before experiment
The daily fluid production rate of the 3, the 2nd month is 2/3 of daily fluid production rate before experiment, is daily fluid production rate before experiment from the daily fluid production rate of 3rd month.
Wherein, the injection rate of emulsion-type Wax removing agent is：During 30%≤paraffin content ＜ 40%, per rice bran oil layer thickness 15-20m3；
During 20%≤paraffin content ＜ 30%, per rice bran oil layer thickness 10-15m3；During paraffin content ＜ 20%, per rice bran oil layer thickness 5-10m3。
The injection rate volume V of microbial wax control agent is：`
V=3.14R2HФβ
In formula：V-microbial wax control agent volume total amount, m3；
R-treatment radius, m, the 1/15~1/12 of value range oil-water well well spacing；
H-oil well effective pay thickiness, m；
Ф-oil well oil reservoir porosity, dimensionless；
β-use level coefficient, dimensionless, value range are：During 30%≤paraffin content ＜ 40%, 0.3≤β≤0.4；20%≤contain
During wax amount ＜ 30%, 0.2≤β≤0.3；During paraffin content ＜ 20%, 0.1≤β≤0.2.
The injection rate of air is 5-10 for the volume ratio with microbial wax control agent:1；The injection rate of water flooding displacement fluid is
30-50m3。
3rd, field test
Field test is carried out according to above-mentioned technique.
Emulsion-type Wax removing agent by 2.0~3.0wt% of hexamethylene, 1.0~2.0wt% of oleic acid, 2.0~3.0wt% of aliphatic acid,
5.0~8.0wt% of surfactant, 3.0~5.0wt% of sodium hydroxide and 0.5~3.0wt% of fatty alcohol polyoxyethylene ether compositions.
The microbial wax control agent by petroleum hydrocarbon degradation bacterium zymotic fluid 1.0-2.0wt% and nutritional agents 2.0-
3.0wt% is formed；Wherein nutritional agents is made of glucose, peptone and dipotassium hydrogen phosphate, mass ratio 1:0.2-0.3:
0.05-0.1。
The injection rate 5-8m of the emulsion-type Wax removing agent3/ h, the injection rate 8-10 m of microbial wax control agent3/
H, the injection rate 10-15Nm of air3The injection rate 15-20 m of/h, water flooding displacement fluid3/h。
The characteristics of present invention is directed to high temperature and high salt high-content wax oil well selects single well stimulation technique, first the oil jacket ring from oil well
Simultaneously closing well for a period of time, makes the crude oil of Wax removing agent and adjacent to oil well area have sufficient work to aerial injection emulsion-type Wax removing agent
Reach effective Paraffin Removal with the time to act on；Secondly, microbial wax control agent and air and water flooding displacement fluid, injection are injected
Air and water flooding displacement fluid main purpose be improve microbial wax control agent swept volume, the microbial wax control of injection
Agent has the function that the paraffin in crude oil degraded, so as to reduce the viscosity of crude oil, improve the mobility of crude oil, significantly
Ground reduces the risk of oil well paraffinication；By above-mentioned technique, Paraffin Removal can be effectively acted as to high temperature and high salt high-content wax oil well
Effect, meanwhile, single well yield can be effectively improved.
The present invention has the following advantages that compared with prior art and beneficial effect：
（1）The invention has the characteristics that technique simple, specific aim and workable, is conducive to field popularization application；
（2）Oil reservoir is applied widely, is not only adapted to high temperature Waxy Production Wells, but also be adapted to high salt Waxy Production Wells；
（3）The present invention not only can effectively control the wax deposition of high temperature and high salt oil well, and with the effect for increasing oil；Meanwhile have
There is the characteristics of term of validity is grown and is highly reliable.
4th, embodiment
The present invention is described in further detail with reference to specific embodiment, and with reference to data.It is to be understood that these embodiments
It is of the invention solely for the purpose of illustration, rather than limit the scope of the invention in any way.
Embodiment 1
Certain oilfield L6, 87 DEG C of reservoir temperature, paraffin content 19.8%, formation water salinity 23563mg/L, permeability 320
×10-3μm2, core intersection 4.5m, viscosity of crude 1235mPa.s, porosity 0.302, day oil 4.3t, daily output liquid 115m3, well spacing
128m, the well controls the wax deposition of oil well hot wash and by way of adding Wax removing agent before testing, and average hot washing period is 25d,
The daily dosage of Wax removing agent is 20kg, using the method for the present invention in oil well L6Implement single well stimulation field test, specifically
Implementation steps are as follows：
1st, oil well screening is tested
Oil well screening criteria is 90 DEG C of reservoir temperature ＜, paraffin content ＜ 40%, formation water salinity ＜ 100000mg/L, is oozed
Saturating rate ＞ 100 × 10-3μm2It is more than 2m with core intersection；Oil well L687 DEG C of reservoir temperature, paraffin content 19.8%, water flooding mineralising
Spend 23563mg/L, permeability 320 × 10-3μm2, core intersection 4.5m, meet the screening criteria of oil well, can implement in the well
The present invention.
2nd, single well stimulation process choice
Oil well single well stimulation technique is as follows：Emulsion-type Wax removing agent, emulsion-type are injected first from the oil jacket annular space of oil well
Closing well 3d after Wax removing agent has been noted；Microbial wax control agent, air and water flooding displacement fluid are implanted sequentially after closed-in time,
Closing well 17d after water flooding displacement fluid has been noted；After closed-in time, oil well opening well and making production, the daily fluid production rate of the 1st month is
38.3m3, the daily fluid production rate of the 2nd month is 76.7m3, it is 115m from the daily fluid production rate of 3rd month3。
Wherein, emulsion-type Wax removing agent is by hexamethylene 2.0wt%, oleic acid 2.0wt%, aliphatic acid 2.5wt%, surfactant
6.0wt%, sodium hydroxide 3.0wt% and fatty alcohol polyoxyethylene ether 2.5wt% compositions, injection rate are per rice bran oil layer thickness 9m3、
For 40.5m3, injection rate 5m3/h；Microbial wax control agent by petroleum hydrocarbon degradation bacterium zymotic fluid 2.0wt%, glucose
1.5wt%, peptone 0.4wt% and dipotassium hydrogen phosphate 0.1wt% compositions, the injected slurry volume V=3.14R of microbial wax control agent2H
Фβ=3.14×8.52×4.5×0.302×0.2=61.7m3, injection rate 9m3/h；The injection rate of air is clear with microorganism
The volume ratio of wax-proofing agent is 10:1st, it is 617m3, injection rate 10Nm3/h；The injection rate of water flooding displacement fluid is 30m3, injection
Speed is 15m3/h。
3rd, field test
Field test is carried out according to above-mentioned technique.
In oil well L6After implementing the present invention, oil well stops hot wash and adds Wax removing agent, and the term of validity reaches 4.2 years, oil well
The oil that averagely increases day by day reaches 3.0t, input-output ratio 1:6.5, single well stimulation field test results are good.
Embodiment 2
Certain oilfield M3, 79 DEG C of reservoir temperature, paraffin content 28.3%, formation water salinity 18765mg/L, permeability 850
×10-3μm2, core intersection 4.0m, viscosity of crude 658mPa.s, porosity 0.335, day oil 3.2t, daily output liquid 98m3, well spacing
135m, the well controls the wax deposition of oil well hot wash and by way of adding Wax removing agent before testing, and average hot washing period is 18d,
The daily dosage of Wax removing agent is 25kg, using the method for the present invention in oil well M3Implement single well stimulation field test, specifically
Implementation steps are as follows：
1st, oil well screening is tested
Oil well screening criteria is 90 DEG C of reservoir temperature ＜, paraffin content ＜ 40%, formation water salinity ＜ 100000mg/L, is oozed
Saturating rate ＞ 100 × 10-3μm2It is more than 2m with core intersection；Oil well M379 DEG C of reservoir temperature, paraffin content 28.3%, water flooding mineralising
Spend 18765mg/L, permeability 850 × 10-3μm2, core intersection 4.0m, meet the screening criteria of oil well, can implement in the well
The present invention.
2nd, single well stimulation process choice
Oil well single well stimulation technique is as follows：Emulsion-type Wax removing agent, emulsion-type are injected first from the oil jacket annular space of oil well
Closing well 5d after Wax removing agent has been noted；Microbial wax control agent, air and water flooding displacement fluid are implanted sequentially after closed-in time,
Closing well 15d after water flooding displacement fluid has been noted；After closed-in time, oil well opening well and making production, the daily fluid production rate of the 1st month is
32.7m3, the daily fluid production rate of the 2nd month is 65.3m3, it is 98m from the daily fluid production rate of 3rd month3。
Wherein, emulsion-type Wax removing agent is by hexamethylene 3.0wt%, oleic acid 1.5wt%, aliphatic acid 3.0wt%, surfactant
8.0wt%, sodium hydroxide 4.0wt% and fatty alcohol polyoxyethylene ether 0.5wt% compositions, injection rate are per rice bran oil layer thickness 13m3、
For 52m3, injection rate 6m3/h；Microbial wax control agent by petroleum hydrocarbon degradation bacterium zymotic fluid 1.5wt%, glucose
2.2wt%, peptone 0.6wt% and dipotassium hydrogen phosphate 0.2wt% compositions, the injected slurry volume V=3.14R of microbial wax control agent2H
Фβ=3.14×10.42×4.0×0.335×0.27=122.9m3, injection rate 8m3/h；The injection rate of air is and microorganism
The volume ratio of Wax removing agent is 5:1st, it is 615m3, injection rate 12Nm3/h；The injection rate of water flooding displacement fluid is 40m3, note
It is 18m to enter speed3/h。
3rd, field test
Field test is carried out according to above-mentioned technique.
In oil well M3After implementing the present invention, oil well stops hot wash and adds Wax removing agent, and the term of validity reaches 3.7 years, oil well
The oil that averagely increases day by day reaches 2.3t, input-output ratio 1:5.2, single well stimulation field test results are good.
Embodiment 3
Certain oilfield R1, 83 DEG C of reservoir temperature, paraffin content 31.2%, formation water salinity 11456mg/L, permeability 650
×10-3μm2, core intersection 2.3m, viscosity of crude 678mPa.s, porosity 0.326, day oil 5.2t, daily output liquid 146m3, well spacing
126m, the well controls the wax deposition of oil well hot wash and by way of adding Wax removing agent before testing, and average hot washing period is 16d,
The daily dosage of Wax removing agent is 30kg, using the method for the present invention in oil well R1Implement single well stimulation field test, specifically
Implementation steps are as follows：
1st, oil well screening is tested
Oil well screening criteria is 90 DEG C of reservoir temperature ＜, paraffin content ＜ 40%, formation water salinity ＜ 100000mg/L, is oozed
Saturating rate ＞ 100 × 10-3μm2It is more than 2m with core intersection；Oil well R183 DEG C of reservoir temperature, paraffin content 31.2%, water flooding mineralising
Spend 11456mg/L, permeability 650 × 10-3μm2, core intersection 2.3m, meet the screening criteria of oil well, can implement in the well
The present invention.
2nd, single well stimulation process choice
Oil well single well stimulation technique is as follows：Emulsion-type Wax removing agent, emulsion-type are injected first from the oil jacket annular space of oil well
Closing well 4d after Wax removing agent has been noted；Microbial wax control agent, air and water flooding displacement fluid are implanted sequentially after closed-in time,
Closing well 20d after water flooding displacement fluid has been noted；After closed-in time, oil well opening well and making production, the daily fluid production rate of the 1st month is
48.7m3, the daily fluid production rate of the 2nd month is 97.3m3, it is 146m from the daily fluid production rate of 3rd month3。
Wherein, emulsion-type Wax removing agent is by hexamethylene 2.5wt%, oleic acid 1.0wt%, aliphatic acid 2.0wt%, surfactant
5.0wt%, sodium hydroxide 5.0wt% and fatty alcohol polyoxyethylene ether 3.0wt% compositions, injection rate are per rice bran oil layer thickness 16m3, be
36.8m3, injection rate 8m3/h；Microbial wax control agent by petroleum hydrocarbon degradation bacterium zymotic fluid 1.0wt%, glucose
1.9wt%, peptone 0.5wt% and dipotassium hydrogen phosphate 0.1wt% compositions, the injected slurry volume V=3.14R of microbial wax control agent2H
Фβ=3.14×10.52×2.3×0.326×0.32=83.1m3, injection rate 10m3/h；The injection rate of air is and microorganism
The volume ratio of Wax removing agent is 7:1st, it is 582m3, injection rate 15Nm3/h；The injection rate of water flooding displacement fluid is 50m3, note
It is 20m to enter speed3/h。
3rd, field test
Field test is carried out according to above-mentioned technique.
In oil well R1After implementing the present invention, oil well stops hot wash and adds Wax removing agent, and the term of validity reaches 4.8 years, oil well
The oil that averagely increases day by day reaches 3.2t, input-output ratio 1:7.3, single well stimulation field test results are good.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, Er Qie
In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Profit requires rather than described above limits, it is intended that all in the implication and scope of the equivalency of claim by falling
Change is included in the present invention.
Moreover, it will be appreciated that although the present specification is described in terms of embodiments, not each embodiment is only wrapped
Containing an independent technical solution, this narrating mode of specification is only that those skilled in the art should for clarity
Using specification as an entirety, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
It is appreciated that other embodiment.
Claims (5)
1. a kind of method that high temperature and high salt high-content wax oil well compound throughput recovers the oil, it is characterised in that this method specifically includes following
Step：
(1) oil well screening is tested
90 DEG C of oil well screening criteria reservoir temperature ＜, paraffin content ＜ 40%, formation water salinity ＜ 100000mg/L, permeability ＞
100×10-3μm2It is more than 2m with core intersection；
(2) single well stimulation process choice
Oil well single well stimulation technique is as follows：
Emulsion-type Wax removing agent is injected first from the oil jacket annular space of oil well, closing well 3-5d after emulsion-type Wax removing agent has been noted；Close
Microbial wax control agent, air and water flooding displacement fluid, closing well after water flooding displacement fluid has been noted are implanted sequentially after the well time
15-20d；After closed-in time, oil well opening well and making production, the daily fluid production rate of the 1st month is the 1/3, the 2nd of daily fluid production rate before experiment
The daily fluid production rate of a month is 2/3 of daily fluid production rate before experiment, is daily fluid production rate before experiment from the daily fluid production rate of 3rd month；
Wherein, the injection rate of emulsion-type Wax removing agent is：During 30%≤paraffin content ＜ 40%, per rice bran oil layer thickness 15-20m3；
During 20%≤paraffin content ＜ 30%, per rice bran oil layer thickness 10-15m3；During paraffin content ＜ 20%, per rice bran oil layer thickness 5-10m3；
The injection rate volume V of microbial wax control agent is：`
V=3.14R2HФβ
In formula：V-microbial wax control agent volume total amount, m3；
R-treatment radius, m, the 1/15~1/12 of value range oil-water well well spacing；
H-oil well effective pay thickiness, m；
Ф-oil well oil reservoir porosity, dimensionless；
β-use level coefficient, dimensionless, value range are：During 30%≤paraffin content ＜ 40%, 0.3≤β≤0.4；20%≤content of wax
When measuring ＜ 30%, 0.2≤β≤0.3；During paraffin content ＜ 20%, 0.1≤β≤0.2；
The injection rate of air is 5-10 for the volume ratio with microbial wax control agent:1；The injection rate of water flooding displacement fluid is 30-
50m3；
(3) field test
Field test is carried out according to above-mentioned technique.
2. the method that a kind of high temperature and high salt high-content wax oil well compound throughput according to claim 1 recovers the oil, it is characterised in that
The emulsion-type Wax removing agent by 2.0~3.0wt% of hexamethylene, 1.0~2.0wt% of oleic acid, 2.0~3.0wt% of aliphatic acid,
5.0~8.0wt% of surfactant, 3.0~5.0wt% of sodium hydroxide, 0.5~3.0wt% of fatty alcohol polyoxyethylene ether and its
Yu Weishui is formed.
3. the method that a kind of high temperature and high salt high-content wax oil well compound throughput according to claim 1 or 2 recovers the oil, its feature exist
In, the microbial wax control agent by the zymotic fluid 1.0-2.0wt% of petroleum hydrocarbon degradation bacterium, nutritional agents 2.0-3.0wt% and
Remaining is formed for water.
4. the method that a kind of high temperature and high salt high-content wax oil well compound throughput according to claim 3 recovers the oil, it is characterised in that
The nutritional agents is made of glucose, peptone and dipotassium hydrogen phosphate, mass ratio 1:0.2-0.3:0.05-0.1.
5. the method that a kind of high temperature and high salt high-content wax oil well compound throughput according to claim 1 recovers the oil, it is characterised in that
The injection rate 5-8m of the emulsion-type Wax removing agent3/ h, the injection rate 8-10m of microbial wax control agent3/ h, air
Injection rate 10-15Nm3The injection rate 15-20m of/h, water flooding displacement fluid3/h。
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| CN101131080A (en) * | 2006-08-25 | 2008-02-27 | 上海中油企业集团有限公司 | Oil production method with microbial single well stimulation |
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