CN108442906A - Steam soak Heavy Oil Reservoir perforating methods and perforation structure - Google Patents
Steam soak Heavy Oil Reservoir perforating methods and perforation structure Download PDFInfo
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- CN108442906A CN108442906A CN201810382080.XA CN201810382080A CN108442906A CN 108442906 A CN108442906 A CN 108442906A CN 201810382080 A CN201810382080 A CN 201810382080A CN 108442906 A CN108442906 A CN 108442906A
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- Prior art keywords
- oil reservoir
- target oil
- perforation
- target
- thickness
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/11—Perforators; Permeators
-
- 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
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
-
- 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
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
Abstract
The embodiment of the present application discloses a kind of steam soak Heavy Oil Reservoir perforating methods and perforation structure, includes the following steps：Obtain the geological information near target oil reservoir；According to the geological information, perforation information is determined.The geological information indicates the overlying of target oil reservoir and underlies whether have water layer.Step " according to the geological information, determining perforation information " includes：When the overlying of target oil reservoir and underlie there is no water layer when, obtain the thickness span of entire target oil reservoir；When the thickness span of all target oil reservoirs is more than preset value, perforation is carried out using the first shot density to each target oil reservoir more than first predeterminated position；Each target oil reservoir below to the first predeterminated position carries out perforation using the second shot density, wherein the first shot density is less than the second shot density.The oil reservoir perforation composite structure and method improve recovery ratio to heavy crude reservoir and are of great significance.
Description
Technical field
This application involves petroleum collection field, in particular to a kind of steam soak Heavy Oil Reservoir perforating methods and
Perforation structure.
Background technology
The method that Heavy Oil Reservoir mostly uses steam soak at present is exploited, since in steam injection process, steam has super
The characteristics of covering, that is, for the steam injected when heated oil reservoir, steam and coagulation are due to gravitational differentiation, and vapour-liquid is in oil reservoir
The phenomenon that flow velocity difference is generated on section.Direct result caused by this steam overlap is exactly to penetrate out oil reservoir steam injection amount top to be more than
Lower part, it is uneven that long-term throughput causes oil reservoir longitudinally to employ, and influences oil reservoir whole development effect.
Invention content
A kind of steam soak Heavy Oil Reservoir perforating methods and perforation structure are provided in the embodiment of the present application, it is dynamic to improve oil reservoir
Use degree.
To achieve the above object, this application provides a kind of steam soak Heavy Oil Reservoir perforating methods, include the following steps：
Obtain the geological information near target oil reservoir；According to the geological information, perforation information is determined, wherein the geological information table
Show the overlying of target oil reservoir and underlies whether have water layer.
Preferably, step " according to the geological information, determining perforation information " includes：
When the overlying of target oil reservoir and underlie there is no water layer when, obtain the thickness span of entire target oil reservoir；
When the thickness span of all target oil reservoirs is more than preset value, to each target oil reservoir more than first predeterminated position
Perforation is carried out using the first shot density；Each target oil reservoir below to the first predeterminated position is carried out using the second shot density
Perforation, wherein the first shot density is less than the second shot density.
Preferably, first predeterminated position is generally located at the middle part of all target oil reservoirs.
Preferably, it when the thickness span of all target oil reservoirs is less than preset value, is carried out using third shot density
Perforation.
Preferably, step " when all target oil reservoirs thickness span be less than or equal to preset value, using third perforation
Density carries out perforation ", including
Obtain the thickness of each target oil reservoir；
When the thickness of single target oil reservoir meets the first preset condition, extremely should to the second predeterminated position of the target oil reservoir
The bottom circle of target oil reservoir carries out perforation；
When the thickness of single target oil reservoir meets the second preset condition, holostrome position perforation is carried out to the target oil reservoir.
Preferably, second predeterminated position to the target oil reservoir bottom circle height be the target core intersection three/
Two.
Preferably, step " according to the geological information, determining perforation information " includes：
When be covered on target oil reservoir water layer, oil reservoir underlie there is no water layer when, it is pre- to third to the top circle of target oil reservoir
If carrying out perforation between position, target oil reservoir pushes up boundary to the three of the thickness that the height between third predeterminated position is target oil reservoir
/ mono-.
Preferably, step " according to the geological information, determining perforation information " includes：
When the overlying of target oil reservoir do not have water layer, target oil reservoir underlie have water layer when, to the bottom circle of target oil reservoir to
Perforation is carried out between four predeterminated positions, bottom circle to the height between the 4th predeterminated position of target oil reservoir is the thickness of target oil reservoir
One third.
Preferably, step " according to the geological information, determining perforation information " includes：
When the overlying of target oil reservoir and oil reservoir underlie have water layer when, to the 5th predeterminated position between the 6th predeterminated position
Perforation is carried out, the height of top circle to the 5th predeterminated position of target oil reservoir is the one third of the thickness of target oil reservoir, and the 6th is pre-
If the height of position to the 5th predeterminated position is the one third of the thickness of target oil reservoir.
The embodiment of the present application discloses a kind of steam soak Heavy Oil Reservoir perforation structure, and the perforation structure is by using such as above-mentioned
Perforating methods are formed.
A kind of steam soak Heavy Oil Reservoir perforating methods of offer of the embodiment of the present invention and perforation structure utilize viscous crude oil
In layer steam soak exploitation the characteristics of steam overlap, the perforating methods and perforation composite structure of various oil reservoirs are formulated, effectively profit
With steam, while the vertical producing degree of heavy crude reservoir is improved to greatest extent, realize the effective exploitation of heavy crude reservoir.
With reference to following description and accompanying drawings, the particular implementation of the application is disclosed in detail, specifies the original of the application
Reason can be in a manner of adopted.It should be understood that presently filed embodiment is not so limited in range.In appended power
In the range of the spirit and terms that profit requires, presently filed embodiment includes many changes, modifications and is equal.
The feature for describing and/or showing for a kind of embodiment can be in a manner of same or similar one or more
It is used in a other embodiment, it is combined with the feature in other embodiment, or substitute the feature in other embodiment.
It should be emphasized that term "comprises/comprising" refers to the presence of feature, one integral piece, step or component when being used herein, but simultaneously
It is not excluded for the presence or additional of one or more other features, one integral piece, step or component.
Description of the drawings
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of application for those skilled in the art without having to pay creative labor, can be with root
Other attached drawings are obtained according to these attached drawings.
Fig. 1 a show that steam soak Heavy Oil Reservoir perforation combines schematic structural cross-sectional view, wherein the overlying of target oil reservoir
With a kind of situation not having in water layer that underlies.
Fig. 1 b show that steam soak Heavy Oil Reservoir perforation combines schematic structural cross-sectional view, wherein the overlying of target oil reservoir
With another situation not having in water layer that underlies.
Fig. 1 c show that steam soak Heavy Oil Reservoir perforation combines schematic structural cross-sectional view, wherein the overlying of target oil reservoir
With another situation not having in water layer that underlies.
Fig. 2 a show that steam soak Heavy Oil Reservoir perforation combines schematic structural cross-sectional view, wherein target oil reservoir overlying has
There is water layer, underlies without water layer.
Fig. 2 b show that steam soak Heavy Oil Reservoir perforation combines schematic structural cross-sectional view, wherein target oil reservoir overlying is not
With water layer, underlie with water layer.
Fig. 2 c show that steam soak Heavy Oil Reservoir perforation combines schematic structural cross-sectional view, wherein target oil reservoir has upper
Cover water layer and the water layer that underlies.
Fig. 3 shows the embodiment of the present application steam soak Heavy Oil Reservoir perforating methods.
Specific implementation mode
In order to make those skilled in the art better understand the technical solutions in the application, below in conjunction with the application reality
The attached drawing in example is applied, technical solutions in the embodiments of the present application is clearly and completely described, it is clear that described implementation
Example is merely a part but not all of the embodiments of the present application.Based on the embodiment in the application, this field is common
The every other embodiment that technical staff is obtained without making creative work should all belong to the application guarantor
The range of shield.
It should be noted that when element is referred to as " being set to " another element, it can be directly on another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it can be directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", " left side ",
" right side " and similar statement for illustrative purposes only, are not offered as being unique embodiment.
Unless otherwise defined, all of technologies and scientific terms used here by the article and belong to the technical field of the application
The normally understood meaning of technical staff is identical.The term used in the description of the present application is intended merely to description tool herein
The purpose of the embodiment of body, it is not intended that in limitation the application.Term as used herein "and/or" includes one or more
Any and all combinations of relevant Listed Items.
With reference to shown in Fig. 3, the embodiment of the present application discloses a kind of steam soak Heavy Oil Reservoir perforating methods, including following step
Suddenly：
Obtain the geological information near target oil reservoir 1；
According to the geological information, perforation information is determined.
Specifically, in the present embodiment, the geological information indicates the overlying of target oil reservoir 1 and underlies whether have water layer
2.Perforation information include to target oil reservoir 1 whether perforation, perforating site, perforation layer position, shot density etc..
When geology information table show target oil reservoir 1 overlying and underlie no water layer 2 when, obtain the thickness of entire target oil reservoir 1
Spend span.
When the thickness span of the entire target oil reservoir 1 is less than or equal to preset value (for example, preset value is equal to 80 meters),
Perforation is carried out using third shot density (for example, 16 holes/rice).
Referring to Fig.1 shown in a, for each different target oil reservoir 1, in this case, the thickness of each target oil reservoir 1 is obtained
Degree, when the thickness of single target oil reservoir 1 meet the first preset condition (such as the first preset condition be target oil reservoir 1 thickness it is big
In 10 meters) when, perforation is carried out (for example, second is pre- to the second predeterminated position to the bottom circle of the target oil reservoir 1 of the target oil reservoir 1
If the distance between position to bottom circle of the target oil reservoir 1 is 2/3rds of the thickness of the target oil reservoir 1).By taking Fig. 1 a as an example,
The thickness of single target oil reservoir 1 is D1, and the distance between bottom circle of the second predeterminated position to the target oil reservoir 1 is S1.Wherein, S1
=D1*2/3.
Referring to Fig.1 shown in b, when the thickness of single target oil reservoir 1 meets the second preset condition (such as the second preset condition
Thickness for target oil reservoir 1 is less than or equal to 10 meters and is greater than or equal to 2 meters) when, holostrome position is carried out to the target oil reservoir 1 and is penetrated
Hole.By taking Fig. 1 b as an example, the thickness of single target oil reservoir 1 is D2, and perforation layer position is S2.Wherein S2=D2.
Referring to Fig.1 shown in c, when the thickness span of entire target oil reservoir 1 is more than preset value (for example, preset value is equal to 80 meters)
When, target oil reservoir 1 more than predeterminated position is carried out using the first shot density (for example, 12 holes/rice) and holostrome position perforation
Perforation；To predeterminated position target oil reservoir 1 below using the second shot density (for example, 16 holes/rice) and holostrome position perforation into
Row perforation, wherein the first shot density is less than the second shot density.Preferably, the predeterminated position is generally located at the target oil
The middle part of layer 1.By taking Fig. 1 c as an example, the thickness span of entire target oil reservoir 1 is D3 (being more than preset value), wherein the parts S3-1
Target oil reservoir 1 uses the first shot density, the target oil reservoir 1 of the parts S3-2 to use the second shot density.
With reference to shown in Fig. 2 a, when geology information table shows that the overlying of target oil reservoir 1 does not have underliing for water layer 2 and target oil reservoir 1
When having water layer 2, to the bottom circle of target oil reservoir 1 to carrying out perforation between the 4th predeterminated position, the bottom circle of target oil reservoir 1 is to the 4th pre-
If the height between position is the one third of the thickness of target oil reservoir 1.Shot density can be 16 holes/rice at this time.With Fig. 2 a
For, the thickness of target oil reservoir 1 is D4, and perforation layer position is S4.S4=1/3*D4.
With reference to shown in Fig. 2 b, when geology information table shows that the overlying of target oil reservoir 1 has no water that underlies of water layer 2, oil reservoir
When layer 2, position is preset to perforation, top circle to the third of target oil reservoir 1 is carried out between third predeterminated position to the top circle of target oil reservoir 1
Height between setting is the one third of the thickness of target oil reservoir 1.Shot density can be 16 holes/rice at this time.By taking Fig. 2 b as an example,
The thickness of target oil reservoir 1 is D5, and perforation layer position is S5.S5=1/3*D5.
With reference to shown in Fig. 2 c, when geology information table show target oil reservoir 1 overlying and oil reservoir underlie have water layer 2 when, to the
For five predeterminated positions to perforation is carried out between the 6th predeterminated position, the height of top circle to the 5th predeterminated position of target oil reservoir 1 is mesh
The one third of the thickness of oil reservoir 1 is marked, the height of the 6th predeterminated position to the 5th predeterminated position is the three of the thickness of target oil reservoir 1
/ mono-.Shot density can be 16 holes/rice at this time.By taking Fig. 2 c as an example, the thickness of target oil reservoir 1 is D6, and perforation layer position is S6.
S6=1/3*D6.
The embodiment of the present application also discloses a kind of steam soak Heavy Oil Reservoir perforation structure, and the perforation structure is by using as above
The perforating methods stated are formed.
Certain oil field dune shape Q108 block belongs to typical heavy crude reservoir, since in steam injection process, steam has onlap
The characteristics of, that is, the steam injected when heated oil reservoir, due to gravitational differentiation, in oil reservoir cut open for steam and coagulation by vapour-liquid
The phenomenon that flow velocity difference is generated on face.
Therefore research and utilization a variety of perforation combinations are implemented, and improve oil reservoir using steam overlap principle to greatest extent and adopt
Yield.
Specific implementation step is as follows：
1, it whether there is or not intermediate water is to belong to which kind of Heavy Oil Reservoir group that analysis, which needs the type of reservoir of perforation oil well, first
Conjunction relationship belongs to more set oil reservoirs through analysis Q108-1-X wells and combines, 85 meters of perforation purpose core intersection, 30 layers, therefore utilizes and sink
Product cycle carries out layer group division, considers to employ reservoir using different shot densities, super using steam in steam injection process of handling up
The principle covered achievees the purpose that uniformly to employ oil reservoir.To top 45m oil reservoirs using 12 holes of shot density/ meter Jin Hang constructions, under
40 rice bran oil layer of portion is constructed (referring to Fig.1 c) using 16 holes of shot density/ meter Jin Hang.It monitors, sends out by steam entry profile after steam injection of handling up
Now entire perforated interval oil reservoir suction vapour is substantially uniform, has achieved the purpose that improve recovery ratio to greatest extent.
2, due to the Heavy Oil Reservoir of certain oil field top bar development part tool top bottom edge water, when carrying out perforation construction,
On the one hand oil reservoir is employed to greatest extent, still further aspect will also control top bottom water, extend the development time of oil well.Therefore exist
H626-34-X wells are after the water body volume and energy of abundant analysis top bottom water, to propose that oil reservoir occupies in perforating scheme establishment
Middle perforating scheme, core intersection be 30 meters, perforating site be oil reservoir most middle part 10 meters of thickness, using 16 holes of shot density/rice into
Row construction (Fig. 2 c).Later stage passes through well temperature profile monitoring, keeps away and penetrates that reservoir temperature elevation amplitude is little, and perforating modes have reached keeps away top
The purpose of bottom water.
In this application, mainly using heavy crude reservoir handle up steam injection develop in steam overlap the characteristics of.When on target oil reservoir
Cover and underlie no water layer 2 when, using this composite structure to oil reservoir implement perforation, steam can be efficiently used at the same improve reservoir indulge
To development degree, 20 percentage points of reserves exploitation degree is improved than conventional perforation method；Overlying when target oil reservoir and the tool that underlies
When having water layer, the water logging of top bottom water can effectively be avoided by implementing perforation using this composite structure, extend the mining time of oil well, can have
Effect improves oil recovery.The oil reservoir perforation composite structure and method improve recovery ratio to heavy crude reservoir and are of great significance.
Herein cited any digital value all include between lower limiting value to upper limit value with the lower value of an incremented and
The all values of upper value, there are the intervals of at least two units between any lower value and any much higher value.For example, such as
Fruit elaborates that the quantity of component 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 purpose is arrived in order to illustrate also clearly listing such as 15 to 85,22 in the specification
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 are only intended to the example clearly expressed, it is believed that the numerical value enumerated between minimum and peak is possible to
Combination is all expressly set forth in the specification in a similar manner.
Unless otherwise indicated, all ranges all include all numbers between endpoint and endpoint.It is used together with range
" about " or " approximation " be suitable for two endpoints of the range.Thus, " about 20 to 30 " are intended to covering " about 20 to about
30 ", including at least the endpoint indicated.
All articles and reference disclosed, including patent application and publication, for various purposes by quoting knot
Together in this.The term " substantially by ... constitute " for describing combination should include identified element, ingredient, component or step and reality
Other elements, ingredient, component or the step of the basic novel feature of the combination are not influenced in matter.Using term "comprising" or
" comprising " describes the combination of element here, ingredient, component or step it is also contemplated that substantially by these elements, ingredient, component
Or the embodiment that step is constituted.Here by using term " can with ", it is intended to illustrate that " can with " includes described any
Attribute is all optional.
Multiple element, ingredient, component or step can be provided by single integrated component, ingredient, component or step.Optionally
Ground, single integrated component, ingredient, component or step can be divided into multiple element, ingredient, component or the step of separation.It is used for
The open "a" or "an" for describing element, ingredient, component or step is not said to exclude other elements, ingredient, component
Or step.
It should be understood that above description is to illustrate rather than to be limited.By reading above-mentioned retouch
It states, many embodiments and many applications except the example provided all will be aobvious and easy for a person skilled in the art
See.Therefore, the range of this introduction should not be determined with reference to foregoing description, but should with reference to appended claims and this
The full scope of the equivalent that a little claims are possessed determines.For comprehensive purpose, all articles and with reference to including special
The disclosure of profit application and bulletin is all by reference to being incorporated herein.Theme disclosed herein is omitted in preceding claims
Any aspect is not intended to abandon the body matter, also should not be considered as applicant the theme is not thought of as it is disclosed
Apply for a part for theme.
Claims (10)
1. a kind of steam soak Heavy Oil Reservoir perforating methods, which is characterized in that include the following steps：
Obtain the geological information near target oil reservoir；
According to the geological information, perforation information is determined；Wherein, the geological information indicate the overlying of target oil reservoir and underlie be
It is no to have water layer.
2. steam soak Heavy Oil Reservoir perforating methods according to claim 1, which is characterized in that step is " according to described
Matter information determines perforation information " include：
When the overlying of target oil reservoir and underlie there is no water layer when, obtain the thickness span of entire target oil reservoir；
When the thickness span of all target oil reservoirs is more than preset value, each target oil reservoir more than first predeterminated position is used
First shot density carries out perforation；Each target oil reservoir below to the first predeterminated position is penetrated using the second shot density
Hole, wherein the first shot density is less than the second shot density.
3. steam soak Heavy Oil Reservoir perforating methods according to claim 2, which is characterized in that first predeterminated position
It is generally located at the middle part of all target oil reservoirs.
4. steam soak Heavy Oil Reservoir perforating methods according to claim 2, which is characterized in that when all target oil
When the thickness span of layer is less than preset value, perforation is carried out using third shot density.
5. steam soak Heavy Oil Reservoir perforating methods according to claim 4, which is characterized in that step is " when all described
The thickness span of target oil reservoir is less than or equal to preset value, and perforation is carried out using third shot density ", including
Obtain the thickness of each target oil reservoir；
When the thickness of single target oil reservoir meets the first preset condition, to the second predeterminated position of the target oil reservoir to the target
The bottom circle of oil reservoir carries out perforation；
When the thickness of single target oil reservoir meets the second preset condition, holostrome position perforation is carried out to the target oil reservoir.
6. steam soak Heavy Oil Reservoir perforating methods according to claim 5, which is characterized in that second predeterminated position
Height to the target oil reservoir bottom circle is 2/3rds of the target core intersection.
7. steam soak Heavy Oil Reservoir perforating methods according to claim 1, which is characterized in that step is " according to described
Matter information determines perforation information " include：
When be covered on target oil reservoir water layer, oil reservoir underlie there is no water layer when, position is preset to top circle to the third of target oil reservoir
Carry out perforation between setting, the top circle of target oil reservoir to the thickness that the height between third predeterminated position is target oil reservoir three/
One.
8. steam soak Heavy Oil Reservoir perforating methods according to claim 1, which is characterized in that step is " according to described
Matter information determines perforation information " include：
When the overlying of target oil reservoir do not have water layer, target oil reservoir underlie have water layer when, to the bottom circle of target oil reservoir to the 4th pre-
If carrying out perforation between position, the bottom circle of target oil reservoir to the height between the 4th predeterminated position is the three of the thickness of target oil reservoir
/ mono-.
9. steam soak Heavy Oil Reservoir perforating methods according to claim 1, which is characterized in that step is " according to described
Matter information determines perforation information " include：
When the overlying of target oil reservoir and oil reservoir underlie have water layer when, the 5th predeterminated position is carried out between the 6th predeterminated position
Perforation, the height of top circle to the 5th predeterminated position of target oil reservoir are the one third of the thickness of target oil reservoir, the 6th default position
It sets to the one third for the thickness that the height of the 5th predeterminated position is target oil reservoir.
10. a kind of steam soak Heavy Oil Reservoir perforation structure, which is characterized in that the perforation structure is by using such as claim 1 to 9
Any one perforating methods are formed.
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| CN201810382080.XA CN108442906B (en) | 2018-04-26 | 2018-04-26 | Steam huff and puff heavy oil reservoir perforating method and perforating structure |
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| CN201810382080.XA CN108442906B (en) | 2018-04-26 | 2018-04-26 | Steam huff and puff heavy oil reservoir perforating method and perforating structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111155973A (en) * | 2020-03-16 | 2020-05-15 | 中国石油大学(华东) | Bottom water hydrate reservoir perforation mode optimization method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111155973A (en) * | 2020-03-16 | 2020-05-15 | 中国石油大学(华东) | Bottom water hydrate reservoir perforation mode optimization method |
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