CN110067541A - The water filling of fractured-cavernous carbonate reservoir individual well is for oily method and device - Google Patents
The water filling of fractured-cavernous carbonate reservoir individual well is for oily method and device Download PDFInfo
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- CN110067541A CN110067541A CN201810057341.0A CN201810057341A CN110067541A CN 110067541 A CN110067541 A CN 110067541A CN 201810057341 A CN201810057341 A CN 201810057341A CN 110067541 A CN110067541 A CN 110067541A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 249
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 title claims abstract description 162
- 238000000034 method Methods 0.000 title claims abstract description 46
- 238000002347 injection Methods 0.000 claims abstract description 114
- 239000007924 injection Substances 0.000 claims abstract description 114
- 239000003129 oil well Substances 0.000 claims abstract description 112
- 238000004519 manufacturing process Methods 0.000 claims abstract description 65
- 238000012545 processing Methods 0.000 claims abstract description 26
- 235000020681 well water Nutrition 0.000 claims abstract description 24
- 239000011435 rock Substances 0.000 claims abstract description 23
- 239000002349 well water Substances 0.000 claims abstract description 23
- 230000004069 differentiation Effects 0.000 claims description 21
- 230000007246 mechanism Effects 0.000 claims description 16
- 239000004519 grease Substances 0.000 claims description 12
- 239000013589 supplement Substances 0.000 claims description 12
- 238000011161 development Methods 0.000 claims description 9
- 230000006735 deficit Effects 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 7
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 claims description 2
- 235000002639 sodium chloride Nutrition 0.000 claims description 2
- 239000011780 sodium chloride Substances 0.000 claims description 2
- 238000011084 recovery Methods 0.000 abstract description 16
- 239000010779 crude oil Substances 0.000 abstract description 13
- 239000003921 oil Substances 0.000 description 54
- 230000000694 effects Effects 0.000 description 14
- 239000007921 spray Substances 0.000 description 12
- 230000015572 biosynthetic process Effects 0.000 description 11
- 238000006073 displacement reaction Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 5
- 238000005553 drilling Methods 0.000 description 5
- 239000000243 solution Substances 0.000 description 4
- 230000001186 cumulative effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 210000002268 wool Anatomy 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000010534 mechanism of action Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- DHNCFAWJNPJGHS-UHFFFAOYSA-J [C+4].[O-]C([O-])=O.[O-]C([O-])=O Chemical compound [C+4].[O-]C([O-])=O.[O-]C([O-])=O DHNCFAWJNPJGHS-UHFFFAOYSA-J 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- -1 and therefore Substances 0.000 description 1
- JYYOBHFYCIDXHH-UHFFFAOYSA-N carbonic acid;hydrate Chemical compound O.OC(O)=O JYYOBHFYCIDXHH-UHFFFAOYSA-N 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 206010016256 fatigue Diseases 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 238000012163 sequencing technique Methods 0.000 description 1
- 239000003079 shale oil Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 230000001755 vocal effect Effects 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
- E21B43/20—Displacing by water
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (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)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The present invention provides a kind of water filling of fractured-cavernous carbonate reservoir individual well for oily method and device, this method comprises: determining fracture-cavity type carbonate oil well to be exploited；At the default water filling moment, the water of preset vol is injected into fracture-cavity type carbonate oil well to preset waterflood injection rate and default water injection pressure；Stewing well processing is carried out to the fracture-cavity type carbonate oil well for being marked with water, and fracture hole type carbonate rock oil well is exploited according to default injection-production ratio.Fractured-cavernous carbonate reservoir individual well water filling provided by the invention improves the recovery ratio of crude oil for oily method and device.
Description
Technical field
The present invention relates to oil fields to improve oil recovery factor technical field more particularly to a kind of fractured-cavernous carbonate reservoir list
Well water filling is for oily method and device.
Background technique
Fracture-cavity type carbonate reservoir structure mainly includes three kinds: cave type, hole type, slit formation.Diameter is greater than 100mm
It is cave type reservoir, is often as fracture superposition mound beach body karstification and is formed.Hole type reservoir refers to that general naked eyes can
The corrosion hole seen, hole diameter 2mm~100mm are in irregular dark spots shape on imaging logging image.
For fracture-cavity type carbonate, fractured-cavernous carbonate reservoir initial potential flowing is high, does not produce water or aqueous
Rate is low, but production decline is very fast, and energy attenuation is rapid, when stratum energy decline to a certain extent, need to take further exploitation
The recovery ratio of measure raising crude oil.It under normal conditions, is that crude output is improved by individual well water injection technology, mechanism is that water filling is mended
Fill stratum energy and grease gravitational differentiation.However, due to reasonable manufacturing parameter after construction site water filling parameters, water filling
Deng indefinite, therefore, so that improving crude output existing defects by individual well water injection technology, actual open can not be applied to
Adopt process.
Because how to determine the water filling of fractured-cavernous carbonate reservoir individual well for oily method to improve the recovery ratio of crude oil
It is those skilled in the art's urgent problem to be solved.
Summary of the invention
The present invention provides a kind of water filling of fractured-cavernous carbonate reservoir individual well for oily method and device, to improve adopting for crude oil
Yield.
The embodiment of the present invention provides a kind of water filling of fractured-cavernous carbonate reservoir individual well for oily method, comprising:
Determine fracture-cavity type carbonate oil well to be exploited；
At the default water filling moment, with default waterflood injection rate and default water injection pressure into the fracture-cavity type carbonate oil well
Inject the water of preset vol；
Stewing well processing is carried out to the fracture-cavity type carbonate oil well for being marked with water, and according to default injection-production ratio to fracture hole type carbonic acid
Rock salt oil well is exploited.
In an embodiment of the present invention, determination fracture-cavity type carbonate oil well to be exploited, comprising:
Replace oil supplement stratum Energy Mechanism and water filling that oily gravitational differentiation mechanism is replaced to determine according to water filling described wait exploit
Fracture-cavity type carbonate oil well.
In an embodiment of the present invention, described at the default water filling moment, with default waterflood injection rate and default water injection pressure to
It is injected in the fracture-cavity type carbonate oil well before the water of preset vol, further includes:
The default water filling moment is determined according to the Reservoir type of fracture-cavity type carbonate.
In an embodiment of the present invention, described at the default water filling moment, with default waterflood injection rate and default water injection pressure to
It is injected in the fracture-cavity type carbonate oil well before the water of preset vol, further includes:
The default waterflood injection rate is determined according to the Reservoir type of fracture-cavity type carbonate and development degree.
In an embodiment of the present invention, described at the default water filling moment, with default waterflood injection rate and default water injection pressure to
It is injected in the fracture-cavity type carbonate oil well before the water of preset vol, further includes:
The preset vol is determined according to material balance principle and overall deficit volume.
In an embodiment of the present invention, before the described pair of fracture-cavity type carbonate oil well for being marked with water carries out stewing well processing,
Further include:
At the end of grease gravitational differentiation, the stewing well time is determined according to the Reservoir type of the fracture-cavity type carbonate.
The embodiment of the present invention provides a kind of water filling of fractured-cavernous carbonate reservoir individual well also for oily device, comprising:
Determination unit, for determining fracture-cavity type carbonate oil well to be exploited；
Injection unit, for filling the water the moment default, to preset waterflood injection rate and default water injection pressure to the fracture hole type
The water of preset vol is injected in carbonate rock oil well；
Processing unit for carrying out stewing well processing to the fracture-cavity type carbonate oil well for being marked with water, and is adopted according to default note
Fracture-cavity type carbonate oil well is compared to be exploited.
In an embodiment of the present invention, the determination unit includes the first determining subelement；
Described first determines subelement, for replacing oil supplement stratum Energy Mechanism and water filling to replace oily gravitational differentiation according to water filling
The mechanism of action determines the fracture-cavity type carbonate oil well to be exploited.
In an embodiment of the present invention, the determination unit includes the second determining subelement；
Described second determines subelement, when for determining the default water filling according to the Reservoir type of fracture-cavity type carbonate
It carves.
In an embodiment of the present invention, the determination unit includes that third determines subelement；
The third determines subelement, for according to the Reservoir type of fracture-cavity type carbonate and development degree determination
Default waterflood injection rate.
In an embodiment of the present invention, the determination unit includes the 4th determining subelement；
Described 4th determines subelement, for determining the preset vol according to material balance principle and overall deficit volume.
In an embodiment of the present invention, the determination unit includes the 5th determining subelement；
Described 5th determines subelement, is used at the end of grease gravitational differentiation, according to the fracture-cavity type carbonate
Reservoir type determines the stewing well time.
The embodiment of the invention provides a kind of water fillings of fractured-cavernous carbonate reservoir individual well for oily method and device, by true
Fixed fracture-cavity type carbonate oil well to be exploited, at the default water filling moment, to preset waterflood injection rate and default water injection pressure to seam
The water that preset vol is injected in the type carbonate rock oil well of hole carries out stewing well processing to the fracture-cavity type carbonate oil well for being marked with water,
And fracture hole type carbonate rock oil well is exploited according to default injection-production ratio.It can be seen that fracture hole provided in an embodiment of the present invention
The water filling of type Carbonate Reservoir individual well is pre- before exploiting to fracture hole type carbonate rock oil well for oily method and device
First determine fracture-cavity type carbonate oil well to be exploited, default water filling moment, default waterflood injection rate, default water injection pressure and default
The water of volume, and determining fracture-cavity type carbonate oil well to be exploited, default water filling moment, default waterflood injection rate, default note
After the water of water pressure and preset vol, stewing well processing is carried out to the fracture-cavity type carbonate oil well for being marked with water, further according to default
Injection-production ratio exploits fracture hole type carbonate rock oil well, so that water filling is preferable for the effect of oil, to improve adopting for crude oil
Yield.
Detailed description of the invention
The drawings herein are incorporated into the specification and forms part of this specification, and shows the implementation for meeting the disclosure
Example, and together with specification for explaining the principles of this disclosure.
Fig. 1 is that a kind of fractured-cavernous carbonate reservoir individual well water filling provided in an embodiment of the present invention is shown for the process of oily method
It is intended to；
Fig. 2 is process of another fractured-cavernous carbonate reservoir individual well water filling provided in an embodiment of the present invention for oily method
Schematic diagram；
Fig. 3 is that a kind of fractured-cavernous carbonate reservoir individual well water filling provided in an embodiment of the present invention is shown for the structure of oily device
It is intended to.
Fig. 4 is structure of another fractured-cavernous carbonate reservoir individual well water filling provided in an embodiment of the present invention for oily device
Schematic diagram.
Through the above attached drawings, it has been shown that the specific embodiment of the disclosure will be hereinafter described in more detail.These attached drawings
It is not intended to limit the scope of this disclosure concept by any means with verbal description, but is by referring to specific embodiments
Those skilled in the art illustrate the concept of the disclosure.
Specific embodiment
Example embodiments are described in detail here, and the example is illustrated in the accompanying drawings.Following description is related to
When attached drawing, unless otherwise indicated, the same numbers in different drawings indicate the same or similar elements.Following exemplary embodiment
Described in embodiment do not represent all implementations consistent with this disclosure.On the contrary, they be only with it is such as appended
The example of the consistent device and method of some aspects be described in detail in claims, the disclosure.
Description and claims of this specification and term " first ", " second ", " third " " in above-mentioned attached drawing
The (if present)s such as four " are to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should manage
The data that solution uses in this way are interchangeable under appropriate circumstances, so that the embodiment of the present invention described herein for example can be to remove
Sequence other than those of illustrating or describe herein is implemented.In addition, term " includes " and " having " and theirs is any
Deformation, it is intended that cover it is non-exclusive include, for example, containing the process, method of a series of steps or units, system, production
Product or equipment those of are not necessarily limited to be clearly listed step or unit, but may include be not clearly listed or for this
A little process, methods, the other step or units of product or equipment inherently.
It under normal conditions, is the recovery ratio that crude oil is improved by individual well water injection technology, mechanism is water filling supplement stratum energy
Amount and grease gravitational differentiation.However, since rationally manufacturing parameter etc. is unknown after construction site water filling parameters, water filling
Really, therefore, actual exploitation process can not be applied to.In order to improve the recovery ratio of crude oil, the embodiment of the invention provides one
The water filling of kind fractured-cavernous carbonate reservoir individual well is for oily method, by determining fracture-cavity type carbonate oil well to be exploited, pre-
If filling the water the moment, preset vol is injected into fracture-cavity type carbonate oil well with default waterflood injection rate and default water injection pressure
Water carries out stewing well processing to the fracture-cavity type carbonate oil well for being marked with water, and according to default injection-production ratio to fracture-cavity type carbonate
Oil well is exploited.It can be seen that oily method is replaced in fractured-cavernous carbonate reservoir individual well water filling provided in an embodiment of the present invention,
It is to predefine fracture-cavity type carbonate oil well to be exploited, default note before being exploited to fracture hole type carbonate rock oil well
Water moment, default waterflood injection rate, the water for presetting water injection pressure and preset vol, and determining fracture-cavity type carbonate to be exploited
After oil well, the default water for filling the water moment, default waterflood injection rate, default water injection pressure and preset vol, to the fracture hole for being marked with water
Type carbonate rock oil well carries out stewing well processing, exploits further according to default injection-production ratio to fracture hole type carbonate rock oil well, so that
Water filling is preferable for the effect of oil, to improve the recovery ratio of crude oil.
How to be solved with technical solution of the specific embodiment to technical solution of the present invention and the application below above-mentioned
Technical problem is described in detail.These specific embodiments can be combined with each other below, for the same or similar concept
Or process repeats no more in certain embodiments.Below in conjunction with attached drawing, the embodiment of the present invention is described.
Fig. 1 is that a kind of fractured-cavernous carbonate reservoir individual well water filling provided in an embodiment of the present invention is shown for the process of oily method
It is intended to, fractured-cavernous carbonate reservoir individual well water filling can be filled the water for oily method by fractured-cavernous carbonate reservoir individual well for oil
Device executes, and fractured-cavernous carbonate reservoir individual well water filling can be independently arranged for oily device, also can integrate and sets at other
In standby.Shown in Figure 1, fractured-cavernous carbonate reservoir individual well water filling may include: for oily method
S101, fracture-cavity type carbonate oil well to be exploited is determined.
Exemplary, in embodiments of the present invention, when determining the fracture-cavity type carbonate oil well wait exploit, it is fixed to choose
Hold closure Reservoir Body, preferably bore and meet cave type reservoir oil well, finishing drilling position is Reservoir Body high-order bit and Reservoir Body is vertical
Space is preferable, and water body is small, bottom water energy is weak, and when self-spray is not aqueous or aqueous low, and dynamic holdup is greater than 20 × 104t。
S102, the moment is filled the water default, to preset waterflood injection rate and default water injection pressure to fracture-cavity type carbonate oil well
The water of middle injection preset vol.
Wherein, default water injection pressure can be determined according to the injection length and water flooding regime of water.In view of the safety of production
Property, water injection pressure should maintain within the scope of well head pressure-bearing, for example, initial stage injection pressure is relatively low；With the increasing in injection period
Add, injection pressure is gradually increased, and the mode of tubing string water filling is adopted for machine, and water injection pressure is maintained within 10MPa；For self-spray
The mode of tubing string water filling, water injection pressure is maintained within 20MPa, if fracture-cavity type carbonate builds the pressure, needs to be acidified in time
Processing, to prevent fracture-cavity type carbonate pressure excessive.
After determining fracture-cavity type carbonate oil well to be exploited, so that it may according to predetermined fracture hole to be exploited
Type carbonate rock oil well, default water filling moment, default waterflood injection rate, the water for presetting water injection pressure and preset vol, in default note
The water moment injects the water of preset vol into fracture-cavity type carbonate oil well to preset waterflood injection rate and default water injection pressure.
S103, stewing well processing is carried out to the fracture-cavity type carbonate oil well for being marked with water, and according to default injection-production ratio to fracture hole
Type carbonate rock oil well is exploited.
Wherein, default injection-production ratio refers to the ratio of water injection rate and oil production.It should be noted that in the embodiment of the present invention
In, it when determining default injection-production ratio, can be determined according to the time of exploitation, for example, in water filling for oily initial stage of production, due to residue
Chuck Steak, initial stage of production can properly increase yield, and the default injection-production ratio of initial stage of production can be any value in 0.6 to 1.0；With
The progress of recovery process, more heavy wool replaced out by injection water, remaining oil is less, and the default injection-production ratio for exploiting mid-term can be
Any value in 0.8 to 1.2, the default injection-production ratio for exploiting the later period can be any value in 1.0 to 1.5, certainly, the embodiment of the present invention
It is only illustrated as value of the example to default injection-production ratio, but does not represent that present invention is limited only by this.
It is preset being injected by S102 with preset waterflood injection rate and default water injection pressure into fracture-cavity type carbonate oil well
After the water of volume, so that it may carry out stewing well processing to the fracture-cavity type carbonate oil well for being marked with water, and according to default injection-production ratio
Fracture hole type carbonate rock oil well is exploited, it can be seen that, fractured-cavernous carbonate reservoir list provided in an embodiment of the present invention
Well water filling is for oily method, is to predefine fracture hole type carbon to be exploited before exploiting to fracture hole type carbonate rock oil well
Carbonate Rocks oil well, default water filling moment, default waterflood injection rate, the water for presetting water injection pressure and preset vol, and determining wait open
The fracture-cavity type carbonate oil well adopted, the default water filling moment, default waterflood injection rate, default water injection pressure and preset vol water it
Afterwards, stewing well processing is carried out to the fracture-cavity type carbonate oil well for being marked with water, further according to default injection-production ratio to fracture-cavity type carbonate
Oil well is exploited, so that water filling is preferable for the effect of oil, to improve the recovery ratio of crude oil.
Fractured-cavernous carbonate reservoir individual well water filling provided in an embodiment of the present invention is to be exploited by determination for oily method
Fracture-cavity type carbonate oil well, at the default water filling moment, to preset waterflood injection rate and default water injection pressure to fracture hole type carbonate
The water that preset vol is injected in shale oil well carries out stewing well processing to the fracture-cavity type carbonate oil well for being marked with water, and according to default
Injection-production ratio exploits fracture hole type carbonate rock oil well.It can be seen that fracture-cavity type carbonate provided in an embodiment of the present invention
The water filling of oil reservoir individual well is for oily method, is to predefine seam to be exploited before exploiting to fracture hole type carbonate rock oil well
Hole type carbonate rock oil well, default water filling moment, default waterflood injection rate, the water for presetting water injection pressure and preset vol, and true
Fixed fracture-cavity type carbonate oil well to be exploited, default water filling moment, default waterflood injection rate, default water injection pressure and preset vol
Water after, stewing well processing is carried out to the fracture-cavity type carbonate oil well for being marked with water, further according to default injection-production ratio to fracture hole type carbon
Carbonate Rocks oil well is exploited, so that water filling is preferable for the effect of oil, to improve the recovery ratio of crude oil.
Further, shown in Figure 2 based on embodiment shown in FIG. 1, Fig. 2 is provided in an embodiment of the present invention another
The flow diagram of oily method, fractured-cavernous carbonate reservoir individual well note are replaced in a kind of fractured-cavernous carbonate reservoir individual well water filling
Water replaces the oily method can also to include:
S201, it is determined for oily gravitational differentiation mechanism wait exploit according to water filling for oil supplement stratum Energy Mechanism and water filling
Fracture-cavity type carbonate oil well.
When determining fracture-cavity type carbonate oil well wait exploit, can according to water filling for oil supplement stratum Energy Mechanism and
Water filling determines fracture-cavity type carbonate oil well to be exploited for oily gravitational differentiation mechanism.Specifically, being mended according to water filling for oil
Stratum energy mechanism is filled, closure Reservoir Body, preferably relatively isolated constant volume closure Reservoir Body can be chosen.Since constant volume seals
Closing property Reservoir Body does not have external energy supplement, and energy attenuation is rapid, and pressure is restored quickly after water filling, stratum energy obtains quickly
To supplement, in addition, needing to choose that water body is small, bottom water energy is weak to preferably play injection water supplement stratum energy effect
Oil well.It is aqueous lower when oil well self-spray, illustrate to produce section farther out from oil-water interfaces, water filling is higher for oily recovery percent of reserves；Statistics
When data is shown when aqueous more than 20% or more, water filling is lower for oily recovery percent of reserves, the reason is that oil-water interfaces have risen to shaft bottom
Near, replaceable oil is few, therefore, can choose not aqueous or aqueous low fracture-cavity type carbonate oil well when self-spray；According to note
Water replaces oily gravitational differentiation mechanism, and the realization of gravitational differentiation needs certain flow channel, bores and meet cave type reservoir well
Oil and water displacement space is big, displacement is fast, meets cave type reservoir oil well it is therefore preferable that boring.Make to give full play to grease gravitational differentiation
With, more oil are replaced, injection water need to be injected from Reservoir Body top, finishing drilling Reservoir Body high-order bit oil well can be chosen, and
And Reservoir Body is that vertical reservoir space is preferable.
It should be noted that water filling is to displace more heavy wool for the purpose of oil, therefore, fracture-cavity type carbonate oil well is moved
State reserves are the bigger the better.Statistical data shows: dynamic holdup is greater than 20 × 104The flushing of t replaces oily effect good, and 5 × 104T is extremely
20×104Water filling between t replaces oily effect moderate, less than 5 × 104The water filling of t replaces oily effect poor.
S202, the default water filling moment is determined according to the Reservoir type of fracture-cavity type carbonate.
The reasonable water filling moment can make every energy of oil reservoir be fully used, premature to fill the water or fill the water too late all
It is unfavorable for water filling for oil.The remaining Chuck Steak around oil well self-spray producing initial stage, well can be around oil well if water filling too early
Remaining oil is washed into far from producing well area or other corners, and not only have lost part flow production in this way adopts storage
Amount, wastes the natural energy of oil reservoir.And fill the water too late, then it can reduce production timeliness.
For these reasons, in embodiments of the present invention, it can be determined according to the Reservoir type of fracture-cavity type carbonate pre-
If filling the water the moment, for example, it is contemplated that supplementing to constant volume closing cave type Reservoir Body without extraneous energy, initial production fully relies on day
Right energy flow production, therefore, for constant volume closes cave type Reservoir Body, presetting the water filling moment is to stop in its self-spray
Afterwards；Exploitation pattern with hole edge system cave type Reservoir Body is adopted for machine after first self-spray, and therefore, hole edge system cave type is stored up
For collective, default water filling moment selected strata pressure, which drops to, is difficult to maintain deep pumping well during normal production, i.e., is laminated on ground
Power, which drops to, is difficult to maintain deep pumping well during normal production, i.e., implementable water filling.
S203, default waterflood injection rate is determined according to the Reservoir type and development degree of fracture-cavity type carbonate.
Waterflood injection rate and water injection pressure are there are certain corresponding relationship, and waterflood injection rate is faster, and water injection pressure is higher, this
Outside, waterflood injection rate is limited to the development degree of the Reservoir Body of fracture-cavity type carbonate, and Reservoir Body gets over agensis, and water filling is more difficult,
Injection pressure is higher；And injection pressure is excessively high, will cause formation fracture.But oil and water displacement can be improved in faster waterflood injection rate
Rate shortens water injection cycle, improves production timeliness.Therefore, in embodiments of the present invention, it is reservoir according to fracture-cavity type carbonate
Type and development degree determine default waterflood injection rate, for example, it is contemplated that it is good to cave type Reservoir Body Cave Development, then preset water filling speed
Degree can control 300 to 500m3Any value in/d；And Fracture reservoir is set mainly by the crack more developed as grease
Change channel, therebetween simultaneously occur grease gravitational differentiation and displacement effect, if take biggish waterflood injection rate easily lead to compared with
Big displacement behavior occurs, so that oil is driven onto remote well area, reduces water filling for oily effect, therefore, Fracture reservoir it is pre-
If waterflood injection rate can be less than 300m3/d。
S204, preset vol is determined according to material balance principle and overall deficit volume.
Preset vol refers to preset water filling volume.Water filling volume is one of the important parameter for influencing water filling and replacing oily effect,
It is too low to fill the water volume, stratum energy supplement is insufficient, and the oil displaced is less；It is excessive to fill the water volume, causes oil-water interfaces quick
Lifting, is unfavorable for producing.It therefore, in embodiments of the present invention, is to be determined to preset according to material balance principle and overall deficit volume
Volume, specifically, can be according to matter balance equation
Wherein WiIndicate cumulative water injected, WpIndicate cumulative water production, NpIndicate cumulative oil production；N is indicated under formation condition
The volume of oil, VwIndicate the volume that formation condition is lauched；CoIndicate oil compressibility, CwIndicate the water compressed coefficient；BoIndicate former
Volume factor of the oil under current formation pressure, BoiIndicate volume factor of the crude oil under original formation pressure；BwIndicate that water exists
Volume factor under current formation pressure, BwiIndicate volume factor of the water under original formation pressure；Δ P is stratum pressure drop.
When restoring strata pressure to original formation pressure by water filling, stratum pressure drop Δ P is 0, and oil, water volume
Index variation is little, can approximate value it is equal, then above-mentioned substance equilibrium equation general formula can simplify:
Due to regardless of to stratum water filling how much, strata pressure can not be restored to original formation pressure, and maximum can only achieve
The 90% of original formation pressure, thus in order to meet material balance principle as far as possible, and water filling is improved for oily efficiency, water filling is total
Volume should be 90% or so of overall deficit volume, and the water injection rate of every round can be 2000 sides.
It should be noted that in embodiments of the present invention, sequencing, Ke Yixian are had no between S202, S203 and S204
S202 is executed, S203 is executed again, finally executes S204, S203 can also be first carried out, S202 is executed again, finally execute S204, when
So, S202 can also be first carried out, S202 is executed again, finally executes S203 etc., here, the embodiment of the present invention is only to first carry out
S202, execute S203 again, finally execute S204 for be illustrated, but do not represent the embodiment of the present invention and be limited only to this.
S205, the moment is filled the water default, to preset waterflood injection rate and default water injection pressure to fracture-cavity type carbonate oil well
The water of middle injection preset vol.
Wherein, default water injection pressure can be determined according to the injection length and water flooding regime of water.In view of the safety of production
Property, water injection pressure should maintain within the scope of well head pressure-bearing, for example, initial stage injection pressure is relatively low；With the increasing in injection period
Add, injection pressure is gradually increased, and the mode of tubing string water filling is adopted for machine, and water injection pressure is maintained within 10MPa；For self-spray
The mode of tubing string water filling, water injection pressure is maintained within 20MPa, if fracture-cavity type carbonate builds the pressure, needs to be acidified in time
Processing, to prevent fracture-cavity type carbonate pressure excessive.
It determining fracture-cavity type carbonate oil well to be exploited respectively by above-mentioned S201-S204, presetting the water filling moment, pre-
If after the water of waterflood injection rate and preset vol, so that it may at the default water filling moment, with default waterflood injection rate and default water filling pressure
Power injects the water of preset vol into fracture-cavity type carbonate oil well.
S206, at the end of grease gravitational differentiation, the stewing well time is determined according to the Reservoir type of fracture-cavity type carbonate.
Between the stewing well time directly affects during normal production and crude output, if the stewing well time is too long, grease can be on stratum
In sufficiently carry out gravitational differentiation, but economic cost is higher；If the stewing well time is too short, gravitational differentiation cannot be sufficiently carried out,
Therefore, it is necessary to design the reasonably stewing well time.
In embodiments of the present invention, when grease gravitational differentiation terminates (mark tends to be steady for well head pressure), Ke Yigen
The stewing well time is determined according to the Reservoir type of fracture-cavity type carbonate.For example, after starting stewing well processing, it is contemplated that cave type reservoir
The oil and water displacement space of oil well is big, displacement is fast, then the stewing well time can be determined as any value in 2 to 5 days；Crack elimination oil well
Oil and water displacement space is relatively small, displacement is slower, then boiling in a covered pot over a slow fire the well time can be any value in 10 to 15；Crack and hole type storage
Between the two, boiling in a covered pot over a slow fire the well time can be any value in 7 to 15 days at layer well interface.
S207, stewing well processing is carried out to the fracture-cavity type carbonate oil well for being marked with water, and according to default injection-production ratio to fracture hole
Type carbonate rock oil well is exploited.
Wherein, default injection-production ratio refers to the ratio of water injection rate and oil production.It should be noted that in the embodiment of the present invention
In, it when determining default injection-production ratio, can be determined according to the time of exploitation, for example, in water filling for oily initial stage of production, due to residue
Chuck Steak, initial stage of production can properly increase yield, and the default injection-production ratio of initial stage of production can be any value in 0.6 to 1.0；With
The progress of recovery process, more heavy wool replaced out by injection water, remaining oil is less, and the default injection-production ratio for exploiting mid-term can be
Any value in 0.8 to 1.2, the default injection-production ratio for exploiting the later period can be any value in 1.0 to 1.5, certainly, the embodiment of the present invention
It is only illustrated as value of the example to default injection-production ratio, but does not represent that present invention is limited only by this.
After carrying out stewing well processing to the fracture-cavity type carbonate oil well for being marked with water, so that it may according to default injection-production ratio pair
Fracture-cavity type carbonate oil well is exploited.Opening well and making production process is energy release process, and injection water is formed in opening well and making production
Water cone, opening well and making production oil production is bigger, and water cone is faster, is unfavorable for water filling for oil；Opening well and making production after well stewing for water filling, must meet
The Liquid output that drives a well is lower than this principle of the Liquid output of oil well during normal production before filling the water, and therefore, opening well and making production can take 5mm extremely
The small oil nozzle of any value and back pressure is controlled in 8mm, first self-spray production, rear electric pump production method, thus to fracture-cavity type carbonate
The exploitation of oil well.It can be seen that oily method is replaced in fractured-cavernous carbonate reservoir individual well water filling provided in an embodiment of the present invention, right
It is to predefine fracture-cavity type carbonate oil well to be exploited, default water filling before fracture-cavity type carbonate oil well is exploited
Moment, default waterflood injection rate, the water for presetting water injection pressure and preset vol, and determining fracture-cavity type carbonate oil to be exploited
After well, the default water for filling the water moment, default waterflood injection rate, default water injection pressure and preset vol, to the fracture hole type for being marked with water
Carbonate rock oil well carries out stewing well processing, exploits further according to default injection-production ratio to fracture hole type carbonate rock oil well, so that note
Water is preferable for the effect of oil, to improve the recovery ratio of crude oil.
In actual application, by taking Tarim Oilfield fracture-cavity type carbonate oil well as an example, using the embodiment of the present invention
Shown in the water filling of fractured-cavernous carbonate reservoir individual well for oily method, select the water filling of Harrar Ha Tang oil field first to replace oil well, i.e.,
Ha7Jing is as fracture-cavity type carbonate oil well to be exploited.Well finishing drilling well depth 6645.25m, finishing drilling layer position one room of the Ordovician system
Group occurs severe leakage in shaft bottom, adds up leakage drilling fluid 1223.72m3, which is shown by quiet dynamic data comprehensive analysis
It bores and meets constant volume cave type Reservoir Body high-order bit, dynamic geological reserves 6.6 × 104T, remaining reserves are big, and water filling is suitble to produce for oil,
Self-spray on March 4 in 2009 is gone into operation, and initial stage oil pressure is up to 22.2MPa, and day oil-producing 143t/d, only after 44 days, oil pressure falls zero and stops for production
Oil-producing 2420.02t is tired out in spray.The water filling of the beginning first round on May 14th, 2009, water injection pressure control always the well head in 20MPa and hold
It presses in range, presets waterflood injection rate control in daily water-injection rate 350m3Left and right fills the water total volume 2346.21m3, carry out closing well, oil pressure
Fast quick-recovery is to 18.8MPa；The closing well stewing well time is 2 days, and the small oil nozzle of setting 6mm carries out self-spray production, and daily oil production is up to
258t, stage accumulative increasing oil 2415t.In this well Life cycle production process, implements water filling for oily 40 rounds, add up water filling
9.28×104m3, add up to increase oil 3.51 × 104T, it can be seen that, using fracture-cavity type carbonate oil provided in an embodiment of the present invention
Individual well water filling is hidden for oily method, so that water filling is preferable for the effect of oil, to improve the recovery ratio of crude oil.
Fig. 3 is a kind of structure of the fractured-cavernous carbonate reservoir individual well water filling provided in an embodiment of the present invention for oily device 30
Schematic diagram, certainly, the embodiment of the present invention are only illustrated by taking Fig. 3 as an example, but are not represented present invention is limited only by this, please be joined
As shown in Figure 3, which fills the water may include: for oily device 30
Determination unit 301, for determining fracture-cavity type carbonate oil well to be exploited.
Injection unit 302, for filling the water the moment default, to preset waterflood injection rate and default water injection pressure to fracture hole type carbon
The water of preset vol is injected in Carbonate Rocks oil well.
Processing unit 303, for carrying out stewing well processing to the fracture-cavity type carbonate oil well for being marked with water, and according to default note
Comparison fracture-cavity type carbonate oil well is adopted to be exploited.
Optionally, determination unit 301 includes the first determining subelement 3011, shown in Figure 4, and Fig. 4 is that the present invention is real
The structural schematic diagram of the quarrying apparatus 30 of another fracture-cavity type carbonate oil well of example offer is provided.
First determines subelement 3011, for replacing oil supplement stratum Energy Mechanism and water filling to replace oily gravitational differentiation according to water filling
The mechanism of action determines fracture-cavity type carbonate oil well to be exploited.
Optionally, determination unit 301 includes the second determining subelement 3012.
Second determines subelement 3012, for determining the default water filling moment according to the Reservoir type of fracture-cavity type carbonate.
Optionally, determination unit 301 includes that third determines subelement 3013.
Third determines subelement 3013, default for being determined according to the Reservoir type and development degree of fracture-cavity type carbonate
Waterflood injection rate.
Optionally, determination unit 301 includes the 4th determining subelement 3014.
4th determines subelement 3014, for determining preset vol according to material balance principle and overall deficit volume.
Optionally, determination unit 301 includes the 5th determining subelement 3015.
5th determines subelement 3015, is used at the end of grease gravitational differentiation, according to the reservoir of fracture-cavity type carbonate
Type determines the stewing well time.
The fracture hole of any embodiment accordingly can be performed for oily device 30 in above-mentioned fractured-cavernous carbonate reservoir individual well water filling
For the water filling of type Carbonate Reservoir individual well for the technical solution of oily method, it is similar that the realization principle and technical effect are similar, no longer superfluous herein
It states.
Those skilled in the art after considering the specification and implementing the invention disclosed here, will readily occur to its of the disclosure
Its embodiment.The present invention is directed to cover any variations, uses, or adaptations of the disclosure, these modifications, purposes or
Person's adaptive change follows the general principles of this disclosure and including the undocumented common knowledge in the art of the disclosure
Or conventional techniques.The description and examples are only to be considered as illustrative, and the true scope and spirit of the disclosure are by following
Claims are pointed out.
It should be understood that the present disclosure is not limited to the precise structures that have been described above and shown in the drawings, and
And various modifications and changes may be made without departing from the scope thereof.The scope of the present disclosure is only limited by appended claims
System.
Claims (10)
1. a kind of fractured-cavernous carbonate reservoir individual well water filling is for oily method characterized by comprising
Determine fracture-cavity type carbonate oil well to be exploited；
At the default water filling moment, injected with default waterflood injection rate and default water injection pressure into the fracture-cavity type carbonate oil well
The water of preset vol；
Stewing well processing is carried out to the fracture-cavity type carbonate oil well for being marked with water, and according to default injection-production ratio to fracture-cavity type carbonate
Oil well is exploited.
2. the method according to claim 1, wherein the fracture-cavity type carbonate oil well that the determination is to be exploited,
Include:
The seam to be exploited is determined for oily gravitational differentiation mechanism according to water filling for oil supplement stratum Energy Mechanism and water filling
Hole type carbonate rock oil well.
3. the method according to claim 1, wherein described at the default water filling moment, with default waterflood injection rate and
Default water injection pressure is injected into the fracture-cavity type carbonate oil well before the water of preset vol, further includes:
The default water filling moment is determined according to the Reservoir type of fracture-cavity type carbonate.
4. the method according to claim 1, wherein described at the default water filling moment, with default waterflood injection rate and
Default water injection pressure is injected into the fracture-cavity type carbonate oil well before the water of preset vol, further includes:
The default waterflood injection rate is determined according to the Reservoir type of fracture-cavity type carbonate and development degree.
5. the method according to claim 1, wherein described at the default water filling moment, with default waterflood injection rate and
Default water injection pressure is injected into the fracture-cavity type carbonate oil well before the water of preset vol, further includes:
The preset vol is determined according to material balance principle and overall deficit volume.
6. the method according to claim 1, wherein the described pair of fracture-cavity type carbonate oil well for being marked with water carries out
Before stewing well processing, further includes:
At the end of grease gravitational differentiation, the stewing well time is determined according to the Reservoir type of the fracture-cavity type carbonate.
7. a kind of fractured-cavernous carbonate reservoir individual well water filling is for oily device characterized by comprising
Determination unit, for determining fracture-cavity type carbonate oil well to be exploited；
Injection unit, for filling the water the moment default, to preset waterflood injection rate and default water injection pressure to the fracture hole type carbonic acid
The water of preset vol is injected in rock salt oil well；
Processing unit, for carrying out stewing well processing to the fracture-cavity type carbonate oil well for being marked with water, and according to default injection-production ratio pair
Fracture-cavity type carbonate oil well is exploited.
8. device according to claim 7, which is characterized in that the determination unit includes the first determining subelement；
Described first determines subelement, for replacing oil supplement stratum Energy Mechanism and water filling to replace oily gravitational differentiation according to water filling
Mechanism determines the fracture-cavity type carbonate oil well to be exploited.
9. device according to claim 7, which is characterized in that the determination unit includes the second determining subelement；
Described second determines subelement, determines the default water filling moment for the Reservoir type according to fracture-cavity type carbonate.
10. device according to claim 7, which is characterized in that the determination unit includes that third determines subelement；
The third determines subelement, determines for the Reservoir type and development degree according to fracture-cavity type carbonate described default
Waterflood injection rate.
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