CN106640027B - The construction method of fracture-pore reservoir underground river type karst Reservoir Body space structure well pattern - Google Patents
The construction method of fracture-pore reservoir underground river type karst Reservoir Body space structure well pattern Download PDFInfo
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- 239000011148 porous material Substances 0.000 title claims abstract description 18
- 238000010276 construction Methods 0.000 title claims abstract description 14
- 238000002347 injection Methods 0.000 claims abstract description 40
- 239000007924 injection Substances 0.000 claims abstract description 40
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 34
- 238000004519 manufacturing process Methods 0.000 claims abstract description 31
- 238000004891 communication Methods 0.000 claims abstract description 24
- 238000011161 development Methods 0.000 claims abstract description 16
- 238000012360 testing method Methods 0.000 claims description 24
- 239000000700 radioactive tracer Substances 0.000 claims description 9
- 238000009826 distribution Methods 0.000 claims description 8
- 235000019994 cava Nutrition 0.000 claims description 6
- 238000005260 corrosion Methods 0.000 claims description 4
- 230000007797 corrosion Effects 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 238000009954 braiding Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 13
- 241001074085 Scophthalmus aquosus Species 0.000 abstract description 4
- 239000003129 oil well Substances 0.000 description 5
- 239000010410 layer Substances 0.000 description 4
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- XQCFHQBGMWUEMY-ZPUQHVIOSA-N Nitrovin Chemical compound C=1C=C([N+]([O-])=O)OC=1\C=C\C(=NNC(=N)N)\C=C\C1=CC=C([N+]([O-])=O)O1 XQCFHQBGMWUEMY-ZPUQHVIOSA-N 0.000 description 1
- JLQUFIHWVLZVTJ-UHFFFAOYSA-N carbosulfan Chemical compound CCCCN(CCCC)SN(C)C(=O)OC1=CC=CC2=C1OC(C)(C)C2 JLQUFIHWVLZVTJ-UHFFFAOYSA-N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 235000020681 well water Nutrition 0.000 description 1
- 239000002349 well water Substances 0.000 description 1
Classifications
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- 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
- E21B43/30—Specific pattern of wells, e.g. optimising the spacing of wells
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Abstract
The invention discloses a kind of construction methods of fracture-pore reservoir underground river karst Reservoir Body space structure well pattern.This method is first according to underground river type karst Reservoir Body type, development characteristics and connection model, determine well net deployment principle, to ensure that water drive direction is vertical with advantage communication direction in plane, vertical upper realization seperated layer water injection, then Reservoir Body type, Reservoir Body spatial position and interwell communication situation are met according to the production status of well, brill to determine injection-production well, to ensure that low note height is adopted, it adopts in seam note hole, new well is finally disposed according to remaining oil and well control situation, to realize producing well, water injection well, Reservoir Body distributing rationally on space structure.
Description
Technical field
The present invention relates to oil reservoir development technical field more particularly to a kind of fracture-pore reservoir underground river type karst Reservoir Body spaces
The construction method of structure well pattern.
Background technique
Fracture-pore reservoir is a kind of Carbonate Reservoir for acting on and being formed through more phase tectonic movements and karst superimposed reformation.
In general, the difference of fracture-pore reservoir and sandrock-type oil reservoir is concentrated mainly on the following aspects:
One, the Reservoir Body space type of fracture-pore reservoir is more, and different scale is big, and wherein corrosion hole is main Reservoir Body
Space, crack are main flow channels, and the contribution that basement rock seeps storage is small;The Reservoir Body space of sandrock-type oil reservoir be hole and
Pore throat, different scale are small.
Two, the Reservoir Body space of fracture-pore reservoir is in a discrete distribution, and heterogeneity is strong;The Reservoir Body space of sandrock-type oil reservoir
In continuously distributed, heterogeneity is weaker.
Three, fracture-pore reservoir is " block " shape oil reservoir, and sandstone oil reservoir is " layer " shape oil reservoir.
It is very big that these above-mentioned differences cause the development technique of fracture-pore reservoir and the development technique of sandrock-type oil reservoir to exist
Difference, therefore the plane well pattern construction method of existing hierarchical-development is not suitable for fracture-pore reservoir.
In addition, the well pattern research for fracture-pore reservoir, Li Xinhua, flourish marshal etc. propose " irregular structure well pattern "
Concept.Wherein, the building of well pattern needs to comprehensively consider the Reservoir Body class where inter well connectivity, longitudinal fine and close interval, injection-production well
Factor (the Carbonate Rocks In Tahe Oilfield fracture hole type such as Rong Yuanshuai, Li Xinhua, Liu Xueli at the height position of type, injection-production well etc.
More well fracture-cavity units waterflooding extraction mode [J] the oil-gas geologies of oil reservoir and recovery ratio, 2013,20 (2): 58-61;Li Xinhua, Rong Yuan
Handsome fracture-karst caved carbonate reservoir of Tahe oil field Reasonable Injection adopts well net optimization research [J] drilling technique, 2013,36 (5): 47-
51).Based on interwell communication, using the well to communicate with each other as an injection-production well group, to longitudinal well group for developing fine and close interval
Implement subsection water injection, the setting of injection-production well follow " it is low note height adopt, stitch infuse hole adopt " principle.
However, the above method does not account for the factor of geologic setting.Three kinds of geologic settings of fracture-pore reservoir major developmental: table
Layer weathering crust type karst, underground river type karst and disconnected solution type karst.Under different geologic settings, the development models of fracture hole are not
Together, the distribution characteristics in Reservoir Body space and connection model are also different, therefore the building mode of well pattern is also different.However, existing at present
Some well network design methods, the connection situation being based primarily upon between well, water drive direction is consistent with advantage communication direction, although water filling is shown in
Effect is fast, but is easy to cause water breakthrough, and it to be not optimal technical solution that there are certain hidden danger.
Summary of the invention
In view of the above technical problems, the invention proposes a kind of new to be suitable for fracture-pore reservoir underground river type karst Reservoir Body
Space structure well construction method.Method includes the following steps:
S10 determines well net deployment principle according to underground river type karst Reservoir Body development characteristics and connection model;
S20 determines the production status of well, bores the Reservoir Body type met and Reservoir Body spatial position and interwell communication shape
Condition;
S30 according to the production status of well, bores the Reservoir Body type met and Reservoir Body spatial position and interwell communication situation
To determine injector-producer pair relationship;
S40 disposes new water injection well according to well control situation and remaining oil distribution situation, thus construct producing well, water injection well,
The space structure well pattern that Reservoir Body is distributed rationally on space structure.
According to an embodiment of the invention, the well net deployment principle mainly includes plane top set in above-mentioned steps S10
River and/or the water filling of trunk river edge, trunk river are recovered the oil.
Further, for vertical upper development multilayer Reservoir Body the case where, the well net deployment principle can also include vertical
Upward multilayer braiding water filling.
According to an embodiment of the invention, in above-mentioned steps S20:
The production status of the well includes production capacity situation and water status;
It includes slit formation Reservoir Body, corrosion hole type Reservoir Body and Caves Reservoir Body that the brill, which meets Reservoir Body type,;
The Reservoir Body spatial position refers to the depth for boring the Reservoir Body pay interval met.
In addition, according to an embodiment of the invention, in above-mentioned steps S20, according to injection test data, tracer test data
And/or geologic setting data determines the interwell communication situation.Wherein it is preferred to:
If there is injection test data determines the interwell communication situation with injection test data for main foundation;
If there is no injection test data, with tracer test data for main foundation, the interwell communication situation is determined;
If, with geologic setting data for main foundation, determining the well without injection test data and tracer test data
Between be connected to situation.
Further, the geologic setting data is primarily referred to as underground river karst connection model.
According to an embodiment of the invention, determining injector-producer pair relationship in above-mentioned steps S30 comprising selection, which bores to meet, to be split
Seam Reservoir Body or Reservoir Body are located at the inefficient well of lower curtate position or high water-cut well is converted production well, and selection can connect with converted production well
Well that is logical, boring chance Caves Reservoir Body is producing well.
According to an embodiment of the invention, in above-mentioned steps S40, the region low to well control degree, potentiality of remaining oil is big,
New water injection well is disposed in its lower curtate position.
According to an embodiment of the invention, other than disposing new water injection well, can also be disposed in above-mentioned steps S40
New producing well.
Compared with prior art, one or more embodiments of the invention can have following advantage:
The present invention determines well net deployment principle according to the development characteristics of underground river type karst Reservoir Body and connection model first,
Then the Reservoir Body type and Reservoir Body spatial position and interwell communication situation met according to the production status of well, brill are infused to determine
Well is adopted, so that it is guaranteed that water injection well, producing well, Reservoir Body realize the configuration of optimization on space structure, effectively promotion note, which is adopted, is set
The validity and water-flooding performance and waterflooding development effect of meter.
Other features and advantages of the present invention will be illustrated in the following description, also, partly becomes from specification
It obtains it is clear that understand through the implementation of the invention.The objectives and other advantages of the invention can be by specification, right
Specifically noted structure is achieved and obtained in claim and attached drawing.
Detailed description of the invention
Attached drawing is used to provide further understanding of the present invention, and constitutes part of specification, with reality of the invention
It applies example and is used together to explain the present invention, be not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the flow chart that the method for space structure well pattern is constructed in the embodiment of the present invention;
Fig. 2 is the schematic diagram of the existing basic well pattern in target area in the embodiment of the present invention;
Fig. 3 is showing for the space structure well pattern distributed rationally constructed by target area of the method according to the invention to Fig. 2
It is intended to.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with drawings and examples to the present invention
It is described in further detail.
Fig. 1 is the flow chart that the method for space structure well pattern is constructed in the embodiment of the present invention.In detail below with reference to Fig. 1
Illustrate each step and its principle.
Step S10 determines well net deployment principle according to underground river type karst Reservoir Body development characteristics and connection model.
It is advantage communication direction along river direction along river spread in the type karst Reservoir Body plane of underground river, and vertical river
Direction is secondary communication direction;Vertical upper development single-layer or multi-layer Reservoir Body.In this regard, the present invention proposes a kind of new well net deployment
Principle: plane top set river and trunk river edge note, trunk river are adopted, and water drive direction is vertical with advantage communication direction, from
And guarantee employing for different quality Reservoir Body in plane;And if developing multilayer river on longitudinal direction, implement seperated layer water injection, from
And guarantee employing for different intervals on vertical.
Step S20 determines the production status of well, bores Reservoir Body type, Reservoir Body spatial position and the interwell communication shape met
Condition.
In this step: the production status of well generally includes production capacity situation and water status;Reservoir Body type mainly includes
Slit formation Reservoir Body, corrosion hole type Reservoir Body and Caves Reservoir Body;It is raw that the spatial position of Reservoir Body refers to that brill meets Reservoir Body
The depth of payzone section;And the determination of interwell communication situation is mainly according to one of following three kinds of data or a variety of: injection test data,
Tracer test data and geologic setting data.Specifically, if there is injection test data, then with injection test data for main judgement
It is main judgment basis with tracer test data if there is no injection test data according to interwell communication situation is determined
Interwell communication situation is determined, if sentenced without injection test data and tracer test data with geologic setting data to be main
Disconnected foundation determines interwell communication situation.Herein, geologic setting data is primarily referred to as underground river karst connection model.
Step S30 according to the production status of well and bores Reservoir Body type, Reservoir Body spatial position and the interwell communication met
Situation determines injector-producer pair relationship.
The basic well pattern of fracture-pore reservoir natural energy development phase is the irregular well pattern for the purpose of controlling Reservoir Body,
And the well network design of waterflood stage must carry out on the basis of basic well pattern, usually based on oil well to injection, to bore water
Supplemented by well.Specifically, it is necessary to connect according between the production status of well, the Reservoir Body type for boring chance, Reservoir Body spatial position and well
Logical situation determines metaideophone oil well.In this embodiment, it is preferred that the principle based on " seam note hole is adopted, low note height is adopted ", selection storage
Collective is located at lower curtate position or bores the inefficient well for meeting crack Reservoir Body or high water-cut well as converted production well, and selects Reservoir Body opposite
It is higher and can be connected to converted production well, bore meet Caves Reservoir Body well as producing well, form injector-producer pair each other.
Step S40 disposes new water injection well according to well control situation and remaining oil distribution situation.To construct producing well, note
The space structure well pattern that well, Reservoir Body are distributed rationally on space structure.
It, in this step, can also be according to well control situation in addition to the water injection well formed in step s 30 by oil well to injection
New water injection well is drilled with remaining oil distribution situation.Region that is low especially for well control degree and having remaining oil distribution, at it
New well water injection well is bored in lower curtate position, adopts to reach low note height, promotes the purpose of water-flooding performance and waterflooding development effect.
Certainly, it is also not excluded for a possibility that further disposing new producing well as needed in this step.
It should be noted here that about " lower curtate position " used herein, " inefficient well " and " high water-cut well " etc.
Concept is usually the range met certain condition determined by practical condition.Specifically, " lower curtate position " be relative to
For " high-order bit ", such as the case where B is adopted is infused for A, A well will be in lower position (abbreviation lower curtate position) relative to B well, with
Meet the low high principle adopted of note.For " inefficient well " and " high water-cut well " is generally be directed to the economic validity of well.In general,
" inefficient well " and " high water-cut well " refers to that the oily amount of adopting is very low or even cannot collect the well of oil.Therefore, these above-mentioned concepts exist
It is not specifically limited herein.
Specific embodiment
Below by taking oil field at home block as an example, fracture-pore reservoir underground river karst Reservoir Body space structure well is further described
The building process of net.
First, in accordance with abovementioned steps S10, well net deployment principle is determined according to geologic setting.Due to underground river karst well net deployment
Principle is that branch channel or trunk river edge fill the water, and trunk river recovers the oil, therefore selects branch river to target area shown in Fig. 2
The well metaideophone in road or trunk river edge.
Then it according to abovementioned steps S20 and S30, determines the production status of well, bore the type and space bit of the Reservoir Body met
It sets and interwell communication situation, and thereby determines that injection-production well.Currently, having 10 mouthfuls of wells, the life of each well in target area shown in Fig. 2
Occurrence condition bores the Reservoir Body type met and oil well to injection determining therefrom and to be formed by new injection-production relation as follows
Shown in table table 1.
1 hole condition of table and metaideophone situation list
The position for disposing new water injection well is finally determined according to well control situation and remaining oil distribution situation.As shown in figure 3,
In target area west side, although river where W5, W6 well is not trunk river, their production status are good, and without water filling
Well forms injector-producer pair therewith, therefore can dispose new water injection well I1 between this two mouthfuls of wells, is respectively formed it with W5, W6
New injector-producer pair.
Experienced above-mentioned oil well to injection, new well deployment process after, be formed the present invention to be constructed producing well,
The space structure well pattern that water injection well, Reservoir Body are distributed rationally on space structure, injection-production relation therein are detailed in Fig. 3
Carefully show.
The above, specific implementation case only of the invention, scope of protection of the present invention is not limited thereto, any ripe
Those skilled in the art are known in technical specification of the present invention, modifications of the present invention or replacement all should be in the present invention
Protection scope within.
Claims (8)
1. a kind of construction method of fracture-pore reservoir underground river type karst Reservoir Body space structure well pattern, comprising the following steps:
S10 determines well net deployment principle according to underground river type karst Reservoir Body development characteristics and connection model, including plane
Top set river and/or the water filling of trunk river edge, trunk river are recovered the oil;
S20 determines the production status of well, bores the Reservoir Body type met and Reservoir Body spatial position and interwell communication situation;
S30 according to the production status of well, bores the Reservoir Body type met and Reservoir Body spatial position and interwell communication situation come really
Determine injector-producer pair relationship;
S40 disposes new water injection well according to well control situation and remaining oil distribution situation, to construct producing well, water injection well, preserve
The space structure well pattern that body is distributed rationally on space structure;
Wherein, in step s 30, it determines injector-producer pair relationship, selects Reservoir Body to be located at the inefficient well of lower curtate position or bore and meet crack
The inefficient well of Reservoir Body is converted production well, and selecting to be connected to converted production well, bore the well of chance Caves Reservoir Body is producing well.
2. construction method according to claim 1, it is characterised in that:
The case where for vertical upper development multilayer Reservoir Body, the well net deployment principle further include longitudinal upper multilayer braiding note
Water.
3. construction method according to claim 1, which is characterized in that in step S20:
The production status of the well includes production capacity situation and water status;
The Reservoir Body type met of boring includes slit formation Reservoir Body, corrosion hole type Reservoir Body and Caves Reservoir Body;
The Reservoir Body spatial position refers to the depth for boring the Reservoir Body pay interval met.
4. construction method according to claim 1, it is characterised in that:
In step S20, is determined according to injection test data, tracer test data and/or geologic setting data and connected between the well
Logical situation.
5. construction method according to claim 4, it is characterised in that:
If there is injection test data determines the interwell communication situation with injection test data for main foundation;
If there is no injection test data, with tracer test data for main foundation, the interwell communication situation is determined;
If, with geologic setting data for main foundation, determining and connecting between the well without injection test data and tracer test data
Logical situation.
6. construction method according to claim 5, it is characterised in that:
The geologic setting data refers to underground river karst connection model.
7. construction method as claimed in any of claims 1 to 6, it is characterised in that:
In step s 40, new water injection well is disposed in its lower curtate position in the region low to well control degree, potentiality of remaining oil is big.
8. construction method according to claim 1, it is characterised in that:
In step s 40, other than disposing new water injection well, new producing well is also disposed.
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