CN106285570A - The recovery method of oil well - Google Patents
The recovery method of oil well Download PDFInfo
- Publication number
- CN106285570A CN106285570A CN201610816551.4A CN201610816551A CN106285570A CN 106285570 A CN106285570 A CN 106285570A CN 201610816551 A CN201610816551 A CN 201610816551A CN 106285570 A CN106285570 A CN 106285570A
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- Prior art keywords
- oil well
- oil
- well
- recovery method
- pump
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- 239000003129 oil well Substances 0.000 title claims abstract description 125
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000011084 recovery Methods 0.000 title claims abstract description 19
- 239000003921 oil Substances 0.000 claims abstract description 36
- 239000012530 fluid Substances 0.000 claims abstract description 23
- 238000004519 manufacturing process Methods 0.000 claims abstract description 19
- 238000007664 blowing Methods 0.000 claims abstract description 16
- 239000010779 crude oil Substances 0.000 claims abstract description 15
- 238000005086 pumping Methods 0.000 claims abstract description 12
- 238000006073 displacement reaction Methods 0.000 claims abstract description 7
- 239000013589 supplement Substances 0.000 claims abstract description 7
- 238000000502 dialysis Methods 0.000 claims description 6
- 230000035699 permeability Effects 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims 1
- 230000001186 cumulative effect Effects 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 6
- 230000015572 biosynthetic process Effects 0.000 abstract description 5
- 238000005065 mining Methods 0.000 abstract description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- 238000002372 labelling Methods 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 208000010392 Bone Fractures Diseases 0.000 description 1
- 206010017076 Fracture Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005325 percolation Methods 0.000 description 1
- 239000012925 reference material Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000005507 spraying Methods 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
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/08—Regulating by delivery pressure
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fats And Perfumes (AREA)
Abstract
This application provides the recovery method of a kind of oil well, comprise the steps: target oil well is carried out pressure break.Post-fracturing oil well is carried out stewing well, the crude oil in displacement stratum.After first scheduled time, open the oil well after stewing well, make oil well blowing produce, when the crude oil in oil well can not blowing time, in oil well under enter oil well pump and pump.When the pressure in oil well drops to saturation pressure, close oil well.After second scheduled time, open oil well, utilize oil well pump to continue oil pumping.The same day yield less than predetermined yield time, be again switched off oil well, after second scheduled time, open oil well, utilize oil well pump continue oil pumping, back and forth produce with this, to oil well the most fuel-displaced.The recovery method of the oil well that the present invention provides, can give full play to the effect of fracturing fluid displacement formation crude oil, can effectively utilize fracturing fluid to supplement stratum energy, by oil well pump intermission mining method, improves oil well cumulative oil production, and then improves economic benefit.
Description
Technical field
The application belongs to technical field of petroleum extraction, is specifically related to the recovery method of a kind of oil well.
Background technology
Ultralow permeable reservoir refers to that reservoir permeability is less than the oil reservoir of 10md, and such oil reservoir relies primarily on the mode of pressure break to be carried out
Produce.After oil well carries out pressure break in the past, the big oil nozzle blowing of more than 5mm can be used immediately to produce, after stop-spraying, enter oil well pump down
Produce till the most fuel-displaced.So operation can make initial potential of oil-well higher, but cumulative production is relatively low, deficiency in economic performance.
To this at present still without effective solution.
Summary of the invention
In order to overcome the drawbacks described above of prior art, the technical problem to be solved is to provide opening of a kind of oil well
Mining method, the method can solve under the existing mode of production, and the flowing life time is short, the technical problem that cumulative production is low.
The concrete technical scheme of the present invention is:
The present invention provides the recovery method of a kind of oil well, comprises the steps:
Target oil well is carried out pressure break；
Post-fracturing described oil well is carried out stewing well, so that the crude oil in the abundant dialysis of fracturing fluid, and then displacement stratum；
After first scheduled time, open the described oil well after stewing well, make oil well blowing produce, when the crude oil in oil well not
Can blowing time, in oil well under enter oil well pump and pump；
When the pressure in oil well drops to saturation pressure, close oil well；
After second scheduled time, open oil well, utilize oil well pump to continue oil pumping.
In one preferred embodiment, when the same day, yield was less than predetermined yield, it is again switched off oil well, makes a reservation for through second
After time, open oil well, utilize oil well pump continue oil pumping, back and forth produce with this, to described oil well the most fuel-displaced.
In one preferred embodiment, after described oil well is the most fuel-displaced, carry out the fracturing of a new round.
In one preferred embodiment, described target oil well is arranged on ultralow permeable reservoir.
In one preferred embodiment, the pressure break mode of described target oil well is massive hydraulic fracturing.
In one preferred embodiment, described first scheduled time is 3-7 days.
In one preferred embodiment, the oil nozzle of 2mm-4mm is utilized to carry out blowing production, so that fracturing fluid supplements
Stratum energy, extends flush stage.
In one preferred embodiment, described second scheduled time is 30 days.
In one preferred embodiment, described predetermined yield is 1 ton day.
In one preferred embodiment, when described oil well carries out blowing production, it is 20%-that the row of returning of fracturing fluid leads
40%, thus reach to keep the purpose of stratum energy.
By above technical scheme, the application has the beneficial effects that: the recovery method of the oil well that the present invention provides, can
To give full play to the effect of fracturing fluid displacement formation crude oil, can effectively utilize fracturing fluid to supplement stratum energy, pass through oil well pump
Intermission mining method, improves oil well cumulative oil production, and then improves economic benefit.
This method solve that the investment of ultralow permeable reservoir massive hydraulic fracturing oil well individual well is high, cumulative production is low, deficiency in economic performance
A difficult problem, meets the demand of ultralow permeable reservoir economical and effective exploitation, improves petroleum resources utilization rate.
With reference to explanation hereinafter and accompanying drawing, disclose in detail the particular implementation of the application, specify the former of the application
Reason can be in adopted mode.It should be understood that presently filed embodiment is not so limited in scope.In appended power
In the range of the spirit and terms that profit requires, presently filed embodiment includes many changes, revises and be equal to.
The feature described for a kind of embodiment and/or illustrate can be in same or similar mode one or more
Other embodiment individual uses, combined with the feature in other embodiment, or substitute the feature in other embodiment.
It should be emphasized that term " includes/comprises " existence referring to feature, one integral piece, step or assembly herein when using, but also
It is not excluded for the existence of one or more further feature, one integral piece, step or assembly or additional.
Accompanying drawing explanation
Accompanying drawing described here is only used for task of explanation, and is not intended to limit model disclosed in the present application by any way
Enclose.It addition, the shape of each parts in figure and proportional sizes etc. are only schematically, it is adapted to assist in the understanding to the application, and
It not shape and the proportional sizes specifically limiting each parts of the application.Those skilled in the art, can under teachings of the present application
To select various possible shape and proportional sizes to implement the application as the case may be.In the accompanying drawings:
Fig. 1 is the recovery method flow chart of oil well in the application embodiment；
Fig. 2 be the application embodiment oil well production process in pressure history schematic diagram；
Fig. 3 be the application embodiment oil well production process in production rate curve schematic diagram；
Fig. 4 is the application medium-and-large-sized post-fracturing stratum schematic diagram.
The reference of the figures above: 1, stratum；2, oil well；3, pressure-break.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the application embodiment, the technical scheme in the application embodiment is carried out clearly
Chu, it is fully described by, it is clear that described embodiment is only a part of embodiment of the application rather than whole realities
Execute mode.Based on the embodiment in the application, those of ordinary skill in the art are institute under not making creative work premise
The every other embodiment obtained, broadly falls into the scope of the application protection.
It should be noted that when element is referred to as " being arranged at " another element, and it can be directly on another element
Or element placed in the middle can also be there is.When an element is considered as " connection " another element, and it can be to be directly connected to
To another element or may be simultaneously present centering elements.Term as used herein " vertical ", " level ", " left ",
For illustrative purposes only, being not offered as is unique embodiment for " right " and similar statement.
Unless otherwise defined, all of technology used herein and scientific terminology and the technical field belonging to the application
The implication that technical staff is generally understood that is identical.Term used in the description of the present application is intended merely to describe tool herein
The purpose of the embodiment of body, it is not intended that in limiting the application.Term as used herein "and/or" includes one or more
Arbitrary and all of combination of relevant Listed Items.
As shown in Figures 1 to 4, the present invention provides the recovery method of a kind of oil well, comprises the steps:
S1: target oil well is carried out pressure break.
S2: post-fracturing described oil well is carried out stewing well, so that former in the abundant dialysis of fracturing fluid, and then displacement stratum
Oil.
S3: after first scheduled time, opens the described oil well after stewing well, makes oil well blowing produce, former when in oil well
Oil can not blowing time, in oil well under enter oil well pump and pump.
S4: when the pressure in oil well drops to saturation pressure, closes oil well.
S5: after second scheduled time, open oil well, utilizes oil well pump to continue oil pumping.
In the present embodiment, first have to target oil well is carried out pressure break.This target oil well is generally arranged at special low permeability
Hide.Specifically, the mode of pressure break should select massive hydraulic fracturing, post-fracturing stratum as shown in Figure 4, wherein, labelling 1 table in Fig. 4
Show that stratum, labelling 2 represent that oil well, labelling 3 represent the post-fracturing pressure-break of massive hydraulic fracturing.Under normal circumstances, ground high pressure is utilized
Fracturing fluid is clamp-oned oil reservoir by pump, makes oil reservoir produce crack or expand primary fracture, then clamp-ons proppant, make crack not close
Closing, thus improve the percolation ability of oil reservoir, this technological measure is pressure break.Massive hydraulic fracturing is primarily adapted for use in hypotonic and special hypotonic
Oil reservoir, i.e. fracturing fluid inject more than 10,000 sides, inject about sand amount 1,000 side, pressure breaks more than fracturing fluid discharge capacity 10 sides per hour
Mode.
As shown in Figures 2 and 3, after target oil well is carried out pressure break, post-fracturing described oil well is carried out stewing well, stewing well
Time was first scheduled time, so contributes to fracturing fluid and spreads in the earth formation so that the abundant dialysis of fracturing fluid and then displacement ground
Crude oil in Ceng.Generally for reaching preferable dialysis effect, first scheduled time was set as 3-7 days.Time is the shortest, pressure
Splitting liquid can not dialysis enter in stratum completely, overlong time fracturing fluid can lose efficacy in the earth formation, does not reaches intended exploitation effect.
After stewing well terminates for 3-7 days, the pressure in oil well slowly declines, and now can open oil well, former in oil well
Oil can produce in blowing immediately.Now, in order to the stratum energy that during effectively utilizing massive hydraulic fracturing, fracturing fluid supplements, extend
The flush stage of oil well, the oil nozzle of 2mm-4mm can be used to carry out blowing production.Meanwhile, when described oil well carries out blowing production,
The oil production of oil well to be controlled, further, it is 20%-40% that the row of returning of fracturing fluid to be controlled leads, namely control fracturing fluid returns
Discharge capacity accounts for the 20%-40% injecting fracturing fluid total amount, so can keep stratum energy.
When the crude oil in oil well can not blowing time, in oil well under enter oil well pump and carry out extraction crude oil.The pump of oil well pump
Footpath can use the pump footpath of 38mm-42mm, the most more meets formation condition.(lead to when the pressure in oil well drops to saturation pressure
Often saturation pressure refers to that in-place oil is reduced to natural gas at pressure and starts pressure when separating from crude oil saturation pressure)
Time, oil well to be closed.Because strata pressure is less than after saturation pressure, natural gas can spin off from crude oil, and then causes former
Oil mobility is deteriorated, and stratum energy is not enough.If now continuing crude oil extraction, required energy expenditure is big, is unfavorable for economic benefit.
The generally closed-in time was second scheduled time, and usual second scheduled time is about about 30 days, and such stratum can be the most extensive
Multiple, continuing to produce just to have preferable effect.Open oil well the most again, continue with oil well pump and carry out extracting crude oil.So may be used
To play the energy supplement effect of fracturing fluid further, improve the cumulative oil production of oil well.
The present invention can play oil capacity of well to greatest extent compared to the mining type of tradition pressure break oil reservoir and take
Obtain economic benefit most preferably.
Further, when the daily output of oil well pump oil pumping is less than predetermined yield (usual predetermined yield is 1 ton day), because of
Cost Problems, oil well to be again switched off.After second scheduled time, about about 30 days.Opening oil well the most again, utilization is taken out
Oil pump continues oil pumping.Back and forth carry out with this producing (it is to say, the daily output working as oil well pump oil pumping is less than predetermined yield, generally
When predetermined yield is 1 ton day, it is again switched off oil well, after second scheduled time, about about 30 days.Open oil the most again
Well, utilizes oil well pump to continue oil pumping), till oil well is the most fuel-displaced.So batch (-type) oil pumping production can effectively utilize
Fracturing fluid supplements stratum energy, improves the cumulative oil production of oil well, increases economic efficiency further.
Further, after described oil well is the most fuel-displaced, it is also possible to carry out the fracturing of a new round, pressure now
Schizogenesis is produced and is similarly massive hydraulic fracturing production.At the end of pressure break, equally operate accordingly according to abovementioned steps, repeat
Part does not repeats them here.
It should be noted that the oil well etc. that the present embodiment provides can select the existing structure of any appropriate.For understanding letter
Strategic point illustrates the technical scheme that the present embodiment is provided, and no longer will repeat above-mentioned part at this, and Figure of description also enters
Go corresponding simplification.However, it should be understood that the most therefore the present embodiment is restricted in scope.
Herein cited any digital value all include between lower limit to higher limit with the lower value of an incremented and
, between any lower value and any much higher value, there is the interval of at least two unit in all values of upper value.For example, as
Fruit elaborates that the quantity of parts or the value of process variable (such as temperature, pressure, time etc.) are from 1 to 90, preferably from 20
To 80, more preferably from 30 to 70, then list such as 15 to 85,22 during purpose illustrates that this description the most clearly and arrive
68,43 to 51,30 to 32 is equivalent.For the value less than 1, suitably think that a unit is 0.0001,0.001,0.01,0.1.
These only want the example clearly expressed, it is believed that the institute of the numerical value enumerated between minimum and peak is likely
Combination is expressly set forth in this description the most in a similar manner.
Except as otherwise noted, all scopes all include all numerals between end points and end points.It is used together with scope
" about " or " approximation " be suitable for two end points of this scope.Thus, " about 20 to 30 " are intended to cover that " about 20 to about
30 ", the end points indicated at least is included.
The all articles disclosed and reference material, including patent application and publication, for various purposes by quoting knot
Together in this.Describe combination term " substantially by ... constitute " should include determined by element, composition, parts or step and reality
Other elements, composition, parts or the step of the basic novel feature of this combination is not affected in matter.Use term " comprise " or
" include " combination describing element, composition, parts or step here it is also contemplated that basic by these elements, composition, parts
Or the embodiment that step is constituted.Here by use term " can ", it is intended to illustrate that " permissible " include is described any
Attribute is all optional.
Multiple elements, composition, parts or step can be provided by single integrated component, composition, parts or step.Alternative
Ground, single integrated component, composition, parts or step can be divided into multiple elements, composition, parts or the step of separation.It is used for
The open "a" or "an" describing element, composition, parts or step is not said to get rid of other element, composition, parts
Or step.
It should be understood that above description is to illustrate rather than to limit.By reading above-mentioned retouching
Stating, the many embodiments outside the example provided and many application will be the most all aobvious and easy
See.Therefore, the scope of this teaching should not determine with reference to foregoing description, but should with reference to aforementioned claim and this
The four corner of the equivalent that a little claim are had determines.Include specially for comprehensive purpose, all articles and reference
The disclosure of profit application and bulletin is all passed through with reference to being incorporated herein.Theme disclosed herein is omitted in aforementioned claim
Any aspect is not intended to abandon this body matter, also should not be considered as applicant and is not thought of as disclosed by this theme
A part for application theme.
Claims (10)
1. the recovery method of an oil well, it is characterised in that comprise the steps:
Target oil well is carried out pressure break；
Post-fracturing described oil well is carried out stewing well, so that the crude oil in the abundant dialysis of fracturing fluid, and then displacement stratum；
After first scheduled time, open the described oil well after stewing well, make oil well blowing produce, when the crude oil in oil well can not be certainly
During spray, in oil well under enter oil well pump and pump；
When the pressure in oil well drops to saturation pressure, close oil well；
After second scheduled time, open oil well, utilize oil well pump to continue oil pumping.
The recovery method of oil well the most according to claim 1, it is characterised in that
When the same day, yield was less than predetermined yield, it is again switched off oil well, after second scheduled time, opens oil well, utilize oil well pump
Continue oil pumping, back and forth produce with this, to described oil well the most fuel-displaced.
The recovery method of oil well the most according to claim 2, it is characterised in that after described oil well is the most fuel-displaced, enter
The fracturing of a row new round.
The recovery method of oil well the most according to claim 1, it is characterised in that described target oil well is arranged on special low permeability
Hide.
5. according to the recovery method of the oil well described in claim 1 or 3, it is characterised in that the pressure break mode of described target oil well
For massive hydraulic fracturing.
The recovery method of oil well the most according to claim 1, it is characterised in that described first scheduled time is 3-7 days.
The recovery method of oil well the most according to claim 1, it is characterised in that utilize the oil nozzle of 2mm-4mm to carry out blowing
Produce, so that fracturing fluid supplements stratum energy, extend flush stage.
The recovery method of oil well the most according to claim 1, it is characterised in that described second scheduled time is 30 days.
The recovery method of oil well the most according to claim 1, it is characterised in that described predetermined yield is 1 ton day.
The recovery method of oil well the most according to claim 1, it is characterised in that when described oil well carries out blowing production,
It is 20%-40% that the row of returning of fracturing fluid leads, thus reaches to keep the purpose of stratum energy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610816551.4A CN106285570A (en) | 2016-09-12 | 2016-09-12 | The recovery method of oil well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610816551.4A CN106285570A (en) | 2016-09-12 | 2016-09-12 | The recovery method of oil well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106285570A true CN106285570A (en) | 2017-01-04 |
Family
ID=57710762
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610816551.4A Pending CN106285570A (en) | 2016-09-12 | 2016-09-12 | The recovery method of oil well |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108278104A (en) * | 2018-01-26 | 2018-07-13 | 陕西延长石油(集团)有限责任公司研究院 | A kind of low permeability oil field oil well interval pumping method |
| CN112112604A (en) * | 2019-06-19 | 2020-12-22 | 中国石油天然气股份有限公司 | Method and device for controlling pumping rows between low-permeability oil wells |
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|---|---|---|---|---|
| US20100101790A1 (en) * | 2006-06-08 | 2010-04-29 | Kirk Samuel Hansen | Cyclic steam stimulation method with multiple fractures |
| CN101942984A (en) * | 2010-01-27 | 2011-01-12 | 中国石油化工股份有限公司 | Fracture-cave type carbonate reservoir waterflooding oil replacement recovery method |
| CN104832145A (en) * | 2014-02-07 | 2015-08-12 | 中国石油化工股份有限公司 | Method of improving ultra-deep low-permeability heavy oil steam injection efficiency through fracturing |
| CN105696997A (en) * | 2016-03-31 | 2016-06-22 | 中国石油大学(北京) | Method for achieving interval waterflood swallowing-spitting oil exploitation among multi-stage fracturing horizontal well fractures |
| CN105756634A (en) * | 2016-04-22 | 2016-07-13 | 中国石油大学(北京) | Method for achieving interval waterflood swallowing-spitting oil exploitation among multi-stage fractured horizontal well cracks |
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2016
- 2016-09-12 CN CN201610816551.4A patent/CN106285570A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100101790A1 (en) * | 2006-06-08 | 2010-04-29 | Kirk Samuel Hansen | Cyclic steam stimulation method with multiple fractures |
| CN101942984A (en) * | 2010-01-27 | 2011-01-12 | 中国石油化工股份有限公司 | Fracture-cave type carbonate reservoir waterflooding oil replacement recovery method |
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| CN105696997A (en) * | 2016-03-31 | 2016-06-22 | 中国石油大学(北京) | Method for achieving interval waterflood swallowing-spitting oil exploitation among multi-stage fracturing horizontal well fractures |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108278104A (en) * | 2018-01-26 | 2018-07-13 | 陕西延长石油(集团)有限责任公司研究院 | A kind of low permeability oil field oil well interval pumping method |
| CN108278104B (en) * | 2018-01-26 | 2020-03-31 | 陕西延长石油(集团)有限责任公司研究院 | Oil well interval pumping method for low-permeability oil field |
| CN112112604A (en) * | 2019-06-19 | 2020-12-22 | 中国石油天然气股份有限公司 | Method and device for controlling pumping rows between low-permeability oil wells |
| CN112112604B (en) * | 2019-06-19 | 2023-02-24 | 中国石油天然气股份有限公司 | Method and device for controlling pumping rows between low-permeability oil wells |
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Application publication date: 20170104 |
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