CN108316910A - The well pattern structure and development approach of deep layer bulk fractured reservoir are developed for gas drive - Google Patents
The well pattern structure and development approach of deep layer bulk fractured reservoir are developed for gas drive Download PDFInfo
- Publication number
- CN108316910A CN108316910A CN201810213553.3A CN201810213553A CN108316910A CN 108316910 A CN108316910 A CN 108316910A CN 201810213553 A CN201810213553 A CN 201810213553A CN 108316910 A CN108316910 A CN 108316910A
- Authority
- CN
- China
- Prior art keywords
- horizontal segment
- gas
- oil
- well
- reservoir
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000011161 development Methods 0.000 title claims abstract description 26
- 238000013459 approach Methods 0.000 title claims abstract description 11
- 238000002347 injection Methods 0.000 claims abstract description 54
- 239000007924 injection Substances 0.000 claims abstract description 54
- 230000005465 channeling Effects 0.000 claims abstract description 16
- 238000004519 manufacturing process Methods 0.000 claims abstract description 16
- 239000007789 gas Substances 0.000 claims description 173
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 13
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 8
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 8
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 8
- 230000015572 biosynthetic process Effects 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 7
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 4
- 239000001569 carbon dioxide Substances 0.000 claims description 4
- 239000003345 natural gas Substances 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- 239000003921 oil Substances 0.000 description 43
- 239000004615 ingredient Substances 0.000 description 10
- 238000011084 recovery Methods 0.000 description 7
- 239000010779 crude oil Substances 0.000 description 6
- 238000005553 drilling Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 230000007423 decrease Effects 0.000 description 4
- 238000000605 extraction Methods 0.000 description 3
- 230000002045 lasting effect Effects 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000003129 oil well Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- 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. optimizing the spacing of wells
- E21B43/305—Specific pattern of wells, e.g. optimizing the spacing of wells comprising at least one inclined or horizontal well
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/164—Injecting CO2 or carbonated water
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/166—Injecting a gaseous medium; Injecting a gaseous medium and a liquid medium
- E21B43/168—Injecting a gaseous medium
Abstract
The invention discloses a kind of well pattern structures and development approach for developing deep layer bulk fractured reservoir for gas drive, are related to oil and gas development field, which includes：Two branch horizontal wells, two branch horizontal wells include the straight well section extended downwardly from ground, the first horizontal segment being connected with straight well section and the second horizontal segment, the position of first horizontal segment is higher than the position of the second horizontal segment, has predetermined depth poor between first horizontal segment and the second horizontal segment；Gas injection well, gas injection well are located in first horizontal segment and the upper extent of the second horizontal segment；The well pattern structure for developing deep layer bulk fractured reservoir for gas drive at least has two states, and in the first state, first horizontal segment is production section, and the second horizontal segment is in closed state；In a second state, the second horizontal segment is production section, and first horizontal segment is in closed state.The application can reduce the possibility that gas channeling phenomenon occurs when crestal gas injection develops fractured reservoirs.
Description
Technical field
The present invention relates to oil and gas development field, more particularly to a kind of well for gas drive exploitation deep layer bulk fractured reservoir
Web frame and development approach.
Background technology
The crude oil reserve of fractured reservoirs accounts for 30% or more of the total crude oil reserve in the world at present.Fractured reservoirs with often
Rule oil-gas reservoir, which is compared, has the characteristics that complex lithology, lithofacies change greatly.During failure formula develops fractured reservoirs, when
When stratum energy supply occurs insufficient, it will usually strata pressure is kept using the methods of water filling, gas injection, to supplement stratum energy
Amount.But the difference of the basement rock of fractured reservoirs, crack dual media structure and the two in terms of preserving with seepage flow is normal
It can often lead to that water breakthrough and gas channeling phenomenon occur during water filling, gas injection development, so fractured reservoirs are difficult to obtain ideal
Development effectiveness.
It was verified that crestal gas injection exploitation can make up the deficiency of oil-gas reservoir waterflooding extraction, this method in some cases
The recovery ratio that fractured reservoirs can not only be improved, can also effectively inhibit bottom water coning.Crack is developed in crestal gas injection
During property oil-gas reservoir, the height above sea level of oil-containing part can continue to decline in oil-gas reservoir, if using traditional straight well development scheme,
The perforating site of oil reservoir is originally corresponded in straight well to correspond to gassiness part with the decline of oil-containing part height above sea level, to meeting
Lead to that serious gas channeling phenomenon occurs.It, can only be continuous according to the position of oil-containing part in straight well in order to continual exploitation
Ground re-starts new perforation and completion or drilling well again, but aforesaid operations mode can greatly improve cost, to country
Bring huge financial burden.
Invention content
In order to overcome the drawbacks described above of the prior art, the technical problem to be solved is that provide one kind for the embodiment of the present invention
The well pattern structure and development approach that deep layer bulk fractured reservoir is developed for gas drive can be reduced and be split in crestal gas injection exploitation
The possibility of gas channeling phenomenon occurs when the oil-gas reservoir of seam property.
The specific technical solution of the embodiment of the present invention is：
A kind of well pattern structure for gas drive exploitation deep layer bulk fractured reservoir, including：
Two branch horizontal wells, two branch horizontal well include the straight well section extended downwardly from ground and the straight well section
The first horizontal segment being connected and the second horizontal segment, the position of the first horizontal segment are higher than the position of second horizontal segment,
Have predetermined depth poor between the first horizontal segment and second horizontal segment；
Gas injection well, the gas injection well are located in the first horizontal segment and the upper extent of second horizontal segment；
The well pattern structure for gas drive exploitation deep layer bulk fractured reservoir at least has two states, at the first
Under state, the first horizontal segment is production section, and second horizontal segment is in closed state；In a second state, described
Two horizontal segments are production section, and the first horizontal segment is in closed state.
In a preferred embodiment, the first horizontal segment is located at the middle part of formation at target locations, and described second is horizontal
Section is located at the bottom of formation at target locations.
In a preferred embodiment, two branch horizontal well further includes：Connect the straight well section and described
First lower curved section of one horizontal segment, the second lower curved section of connection the straight well section and second horizontal segment.
In a preferred embodiment, the predetermined depth difference by the thickness of oil-containing part in oil-gas reservoir with developing
The distance that oil-containing part moves down in the process is determined.
In a preferred embodiment, it is projected on horizontal plane in the first horizontal segment and second horizontal segment
When, the angle between the first horizontal segment and second horizontal segment is between 0 degree to 30 degree.
In a preferred embodiment, the medium of the gas injection well injection includes at least one of following：Carbon dioxide,
Nitrogen, natural gas, phlogisticated air.
In a preferred embodiment, the length of second horizontal segment is more than the length of the first horizontal segment.
In a preferred embodiment, the position of the gas injection well is located at the height above sea level peak of oil-gas reservoir.
In a preferred embodiment, in the first state, the first horizontal segment is located at the oil-containing of oil-gas reservoir
Partial middle part, second horizontal segment are located at the bottom of the oil-containing part of oil-gas reservoir or the top containing water section.
In a preferred embodiment, in a second state, second horizontal segment is located at the oil-containing of oil-gas reservoir
Part, the first horizontal segment are located at the gassiness part of oil-gas reservoir or the intermediate zone of oil-containing part and gassiness part.
A kind of exploitation according to any of the above-described well pattern structure for developing deep layer bulk fractured reservoir for gas drive
Method includes the following steps：
Gas medium is injected into the gas injection well；
First horizontal segment in two branch horizontal well is opened, the second horizontal segment closing, to pass through described first
Horizontal segment exploits oil-gas reservoir；
When reaching preset condition for the moment, the first horizontal segment in two branch horizontal well is closed, the second horizontal segment is opened
It opens, to be exploited to oil-gas reservoir by second horizontal segment.
In a preferred embodiment, the preset condition one includes at least following one：The first horizontal segment
There is the gassiness part in gas channeling phenomenon, oil-gas reservoir and moves downward the oil-containing part contacted in the first horizontal segment, oil-gas reservoir
It moves downward and touches second horizontal segment.
In a preferred embodiment, this method is further comprising the steps of：
When reaching preset condition two, stop injecting gas medium into the gas injection well, and by two branch water
The second horizontal segment closing in horizontal well.
In a preferred embodiment, the preset condition two includes at least following one：Second horizontal segment
There is the gassiness part in gas channeling phenomenon, oil-gas reservoir and moves downward contact second horizontal segment.
Technical scheme of the present invention has following notable advantageous effect：
Compared with traditional straight well flooding pattern, the well for gas drive exploitation deep layer bulk fractured reservoir in the application
Web frame and development approach need not with the reduction of oil-containing part height above sea level in landing surface and to straight well carry out continuous perforation with it is complete
Well operates, and two branch horizontal wells have first horizontal segment and the second horizontal segment simultaneously, with well control large storage capacity, can link up
The characteristics of many cracks, can save a large amount of drilling well investment compared to large number of straight well.With conventional straight well as note
Enter well, horizontal well is compared as the well pattern structure of producing well, the present invention can first horizontal segment occur has channeling after to its into
Row closing well operates, and continues to produce using the second horizontal segment, can efficiently reduce the gas production in oil well in this way, and not
The new horizontal well that spuds in is needed, to save drilling well investment.
Description of the drawings
Attached drawing described here is only used for task of explanation, and is not intended to limit model disclosed by the invention in any way
It encloses.In addition, the shape and proportional sizes etc. of each component in figure are only schematical, it is used to help the understanding of the present invention, and
It is not the specific shape and proportional sizes for limiting each component of the present invention.Those skilled in the art under the teachings of the present invention, can
Implement the present invention to select various possible shapes and proportional sizes as the case may be.
Fig. 1 is the structural representation for the well pattern structure for developing deep layer bulk fractured reservoir in the embodiment of the present invention for gas drive
Figure.
Fig. 2 is injection production profile figure when first horizontal segment produces in the embodiment of the present invention.
Fig. 3 is injection production profile figure when the second horizontal segment produces in the embodiment of the present invention.
Fig. 4 is for same oil-gas reservoir in the present invention using the effect contrast figure under different well pattern structure exploitations.
The reference numeral of the figures above：
1, gas injection well；2, two branch horizontal well；3, straight well section；4, the first lower curved section；5, first horizontal segment；6, the second inclined shaft
Section；7, the second horizontal segment；8, gassiness part；9, oil-containing part；10, contain water section.
Specific implementation mode
With reference to the drawings and the description of the specific embodiments of the present invention, the details of the present invention can clearly be understood.But
It is the specific implementation mode of invention described herein, is only used for explaining the purpose of the present invention, and cannot understands in any way
At being limitation of the present invention.Under the teachings of the present invention, technical staff is contemplated that the arbitrary possible change based on the present invention
Shape, these are regarded as belonging to the scope of the present invention.It should be noted that when element is referred to as " being set to " another yuan
Part, 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 to another element or may be simultaneously present centering elements.Term " installation ",
" connected ", " connection " shall be understood in a broad sense, for example, it may be mechanical connection or electrical connection, can also be inside two elements
Connection, can be directly connected, can also indirectly connected through an intermediary, for the ordinary skill in the art,
The concrete meaning of above-mentioned term can be understood as the case may be.Term as used herein " vertical ", " horizontal ",
"upper", "lower", "left", "right" 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.
In order to reduce crestal gas injection develop fractured reservoirs when occur gas channeling phenomenon possibility, avoid straight well after
Need to be re-started according to the position of oil-containing part when continuous exploitation new perforation with completion or again caused by drilling well at
This raising, proposes a kind of well pattern structure for gas drive exploitation deep layer bulk fractured reservoir in this application, and Fig. 1 is this hair
Structural schematic diagram in bright embodiment for the well pattern structure of gas drive exploitation deep layer bulk fractured reservoir, as shown in Figure 1, the use
May include in the well pattern structure of gas drive exploitation deep layer bulk fractured reservoir：Two branch horizontal wells 2, two branch horizontal wells 2 packet
Include the straight well section 3 extended downwardly from ground, the first horizontal segment being connected with straight well section 35 and the second horizontal segment 7, first level
The position of section 5 is higher than the position of the second horizontal segment 7, has predetermined depth poor between first horizontal segment 5 and the second horizontal segment 7；Note
Gas well 1, gas injection well 1 are located in first horizontal segment 5 and the upper extent of the second horizontal segment 7；It is split for gas drive exploitation deep layer bulk
The well pattern structure of seam property oil reservoir at least has two states, and in the first state, first horizontal segment 5 is production section, the second water
Flat section 7 is in closed state；In a second state, the second horizontal segment 7 is production section, and first horizontal segment 5 is in closed state.
Specifically, first horizontal segment 5 is located at the middle part of formation at target locations, i.e., crude oil when oil-gas reservoir is in gas injection development initial stage
At position where layer, such as can be the middle part of oil-containing part, the second horizontal segment 7 is located at the bottom of formation at target locations, i.e., substantially
At position when oil-gas reservoir is in gas injection development initial stage where water flooding, such as the bottom of the oil-containing part of oil-gas reservoir can be located at
Portion or top containing water section.Between first horizontal segment 5 and the second horizontal segment 7 have predetermined depth it is poor, the predetermined depth difference by
In oil-gas reservoir the thickness of oil-containing part and oil-containing part in the process of development move down at a distance from determined.Oil-containing in the process of development
The distance that part moves down is bigger, and the predetermined depth difference is bigger, and the thickness of oil-containing part is bigger in oil-gas reservoir, which gets over
Greatly.
First horizontal segment 5 and the second horizontal segment 7 can be in different perpendiculars, certain face for having due to oil-gas reservoir
Product property, thus first horizontal segment 5 and the second horizontal segment 7 need to meet the following height positioned at 1 height above sea level of gas injection well can.Certainly
, in order to enable the crude oil at different location in oil-gas reservoir to separately flow into first horizontal segment 5 or the second horizontal segment 7
In, when first horizontal segment and the second horizontal segment project on horizontal plane, the folder between first horizontal segment 5 and the second horizontal segment 7
Angle can be between 0 degree to 30 degree, and concrete condition also needs to consider the distribution of the major cracks in stratum during actual well drilled
And the factors such as actual structure form in stratum.
First horizontal segment 5 and the length of the second horizontal segment 7 can be equal in two branch horizontal wells 2, can not also wait.Due to
Gas injection process persistently carries out, and crude oil is constantly enriched with, therefore oil-containing region is constantly in expansion process, certainly, wherein
Oil saturation also constantly increasing, so, in order to obtain higher oil recovery efficiency, in a preferred embodiment,
The length of second horizontal segment 7 can be more than the length of first horizontal segment 5.Certainly, in some embodiments, second horizontal segment 7
Length may also be less than the length of first horizontal segment 5, this is needed according to the actual structure of actual fractue spacing in stratum and stratum
The factors such as appearance shape determine.
In order to facilitate actual well drilled, two branch horizontal wells 2 further include connecting the first of straight well section 3 and first horizontal segment 5 tiltedly
Well section 4, the second lower curved section 5 for connecting straight well section 3 and the second horizontal segment 7.
Compared to traditional straight well injection and extraction system, Area of a well is small, injection well and the corresponding injection rate of producing well
It is all smaller with produced quantity, in order to realize the effective exploitation of oil-gas reservoir, need the large number of straight well that spuds in, this kind of way that will spend
A huge sum of money.Meanwhile with oil-gas reservoir crestal gas injection exploit lasting progress, in the earth formation the height above sea level of oil-containing part 9 will appear
Decline phenomenon.Such that the preforation tunnel for corresponding to oil-containing part 9 in straight well originally transfers to correspond to gassiness part 8, into
And lead to serious gas channeling phenomenon.So under conventional systems, it generally can only be by the way that constantly perforation, completion or brill are new again
The mode of well continues Reservoir Development, this kind operation development scheme will further spend more costs, be it is a kind of more
Uneconomic development scheme.
And developed for gas drive in the well pattern structure of deep layer bulk fractured reservoir what the application proposed, Fig. 2 is this hair
Injection production profile figure when first horizontal segment 5 produces in bright embodiment, as shown in Fig. 2, the position of gas injection well 1 can be located at oil-gas reservoir
Height above sea level peak, the gas injection well 1 be generally straight well.Gas medium is injected into oil-gas reservoir by gas injection well 1, which can be with
For carbon dioxide, nitrogen, natural gas, phlogisticated air etc..During gas medium injects, at this point, being developed for gas drive
The well pattern structure of deep layer bulk fractured reservoir is under the first state.In the first state, first horizontal segment 5 is production
Section, the first horizontal segment 5 are located at the middle part of the oil-containing part 9 of oil-gas reservoir, and the second horizontal segment 7 is located at the oil-containing part 9 of oil-gas reservoir
Bottom or top containing water section 10.In this state, the oil-containing part 9 of oil-gas reservoir is opened by first horizontal segment 5
It adopts, the second horizontal segment 7 may be at closed state and enter two branch horizontal wells 2 to avoid the water containing water section 10 of oil-gas reservoir
In.With the lasting progress of oil-gas reservoir gas injecting mining, the continuous gas injection in top of oil-gas reservoir, the gas of injection is under gravity
It can assemble at the top of oil-gas reservoir and move gradually downward, therefore, gassiness part 8 in oil-gas reservoir, oil-containing part 9 and containing water section 10
Height above sea level can be gradually reduced, when first horizontal segment 5 contacts gassiness part 8, first horizontal segment 5 is caused to start gas channeling phenomenon occur
When, the well pattern structure that deep layer bulk fractured reservoir is developed for gas drive is just transferred to second of state.Fig. 3 is the embodiment of the present invention
In injection production profile figure of second horizontal segment 7 when producing, as shown in figure 3, in a second state, the second horizontal segment 7 is production section,
Second horizontal segment 7 is located at the oil-containing part 9 of oil-gas reservoir, and first horizontal segment 5 is located at gassiness part 8 or the oil-containing part 9 of oil-gas reservoir
With the intermediate zone of gassiness part 8.In this state, the oil-containing part 9 of oil-gas reservoir is exploited by the second horizontal segment 7, the
One horizontal segment 5 may be at closed state and enter in two branch horizontal wells 2 to avoid the gas of oil-gas reservoir gassiness part 8, so
Completely avoid again occurring in crestal gas injection development process the possibility of gas channeling phenomenon.
Following development approaches may be used for gas drive exploitation deep layer bulk fractured reservoir in the application, this method can
To include the following steps：Gas medium is injected into gas injection well first, which can be carbon dioxide, nitrogen, natural
Gas, phlogisticated air etc. pass through the injection of gas medium so that in two branch horizontal wells 2 in 5 top oil-gas reservoir of first horizontal segment
Crude oil is moved down by gas medium displacement.Then the first horizontal segment 5 in two branch horizontal wells 2 is opened, the second horizontal segment 7
Closing, to be exploited to oil-gas reservoir by first horizontal segment 5, the second horizontal segment 7 is likely located at the aqueous of oil-gas reservoir at this time
The top of part 10, it is therefore desirable to be at closed state.With the lasting progress that oil-gas reservoir crestal gas injection is exploited, in stratum
The height above sea level of oil-containing part 9 will appear decline phenomenon so that correspond to the preforation tunnel of oil-containing part 9 in first horizontal segment 5 originally
Then correspond to gassiness part 8, therefore, when reaching preset condition for the moment, by 5 envelope of first horizontal segment in two branch horizontal wells
It closes, enters first horizontal segment 5 to avoid gas medium, the second horizontal segment 7 is opened, thus by the second horizontal segment 7 to oil-gas reservoir
It is exploited.Preset condition one at least may include following one：There is containing in gas channeling phenomenon, oil-gas reservoir in first horizontal segment 5
Gas part moves downward contact first horizontal segment 5, the oil-containing part in oil-gas reservoir moves downward and touches second horizontal segment 7
Deng.With continuing for oil-gas reservoir crestal gas injection exploitation, the height above sea level of oil-containing part 9 continues to occur declining phenomenon in stratum, most
Eventually, gassiness part 8 drops to the second horizontal segment 7 of contact, and oil-containing part 9 drops to the second horizontal segment 7 hereinafter, therefore, when reaching
When preset condition two, preset condition two at least may include following one：Second horizontal segment 7 occurs in gas channeling phenomenon, oil-gas reservoir
Gassiness part 8 move downward contact second horizontal segment 7 etc., stop injecting gas medium into gas injection well 1, and by two branches
The second horizontal segment 7 closing in horizontal well, and then stop exploitation.For fractured reservoirs, basement rock medium is the main of fluid
Reservoir space, fracture medium are main seepage channel.Laboratory test is research shows that due between fracture medium and basement rock medium
Permeability contrast it is huge, such as use waterflooding extraction, water can flow to producing well rapidly along fractuer direction so as to cause involving
Area is small, in this way, water drive recovery percent of reserves is only 14.8% or so.In crestal gas injection exploitation, since gas is compared to stratum original
Oil has lower density, can assemble at the top of oil reservoir under gravity and migrate gradually downward, to significantly increase
The big swept volume of oil reservoir, therefore, gas injection development recovery percent of reserves can reach 41.3%, significantly larger than water drive recovery percent of reserves,
Therefore, it selects to carry out exploitation deep layer bulk crack in such a way that gas injection well 1 injects gas medium to oil-gas reservoir in the present invention
Property oil-gas reservoir.Fig. 4 is that same oil-gas reservoir is such as schemed using the effect contrast figure under different well pattern structure exploitations in the present invention
Shown in 4, it compared in conjunction with numerical simulation for oil-gas reservoir example calculation oily for gas drive exploitation deep layer bulk Fractured in the present invention
Well pattern structure, straight well flooding pattern structure, the straight well of Tibetan are the exploitation for the well pattern structure three that gas injection well horizontal well is producing well
Effect, as can be seen from Figure 4：In the present invention for gas drive exploitation deep layer bulk fractured reservoir well pattern structure it is final
Recovery percent of reserves is 54.5%, is the well pattern structure that gas injection well horizontal well is producing well compared to straight well flooding pattern structure, straight well,
Recovery ratio 33.1% and 13.2% has been respectively increased.
The well pattern structure and development approach for gas drive exploitation deep layer bulk fractured reservoir in the application has as follows
Advantageous effect：Compared with traditional straight well flooding pattern, deep layer bulk fractured reservoir is developed for gas drive in the application
Well pattern structure need not carry out continuous perforation and well completion operations with the reduction of 9 height above sea level of oil-containing part in landing surface and to straight well,
And two branch horizontal wells 2 have first horizontal segment 5 and the second horizontal segment 7 simultaneously, with well control large storage capacity, can link up it is a plurality of
The characteristics of crack, can save a large amount of drilling well investment compared to large number of straight well.With conventional straight well as injection
Well, horizontal well are compared as the well pattern structure of producing well, and the present invention can occur to carry out it after has channeling in first horizontal segment 5
Closing well operates, and continues to produce using the second horizontal segment 7, can efficiently reduce the gas production in oil well in this way, and not
The new horizontal well that spuds in is needed, drilling well investment is also saved to both increase crude output.Being opened for gas drive in the present invention
The well pattern structure of hair deep layer bulk fractured reservoir can realize the relatively usury use to subterranean resource, have certain economic meaning
Justice and environment protection significance.
Above-mentioned each embodiment in this specification is described in a progressive manner, identical between each embodiment
Similar portion is cross-referenced, and what each embodiment stressed is and other embodiment difference.It discloses
All articles and reference, including patent application and publication, are hereby incorporated by by quoting for various purposes.Description combination
Term " substantially by ... constitute " should include identified element, ingredient, component or step and essentially without influence should
Other elements, ingredient, component or the step of the basic novel feature of combination.It is described here using term "comprising" or " comprising "
Element, ingredient, component or step combination it is also contemplated that the implementation being made of substantially these elements, ingredient, component or step
Mode.Here by using term " can with ", it is intended to illustrate that described any attribute that " can with " includes all is 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.
The foregoing is merely several embodiments of the invention, although disclosed herein embodiment it is as above, institute
Content is stated only to facilitate the embodiment for understanding the present invention and using, is not intended to limit the present invention.Any institute of the present invention
Belong to those skilled in the art, do not depart from disclosed herein spirit and scope under the premise of, can be in embodiment
Formal and details on make any modification and variation, but the scope of patent protection of the present invention still must be with appended claims
Subject to the range that book is defined.
Claims (14)
1. a kind of well pattern structure for gas drive exploitation deep layer bulk fractured reservoir, which is characterized in that including：
Two branch horizontal wells, two branch horizontal well include the straight well section extended downwardly from ground, are connected with the straight well section
The first horizontal segment connect and the second horizontal segment, the position of the first horizontal segment is higher than the position of second horizontal segment, described
Have predetermined depth poor between first horizontal segment and second horizontal segment；
Gas injection well, the gas injection well are located in the first horizontal segment and the upper extent of second horizontal segment；
The well pattern structure for gas drive exploitation deep layer bulk fractured reservoir at least has two states, in the first state
Under, the first horizontal segment is production section, and second horizontal segment is in closed state；In a second state, second water
Flat section is production section, and the first horizontal segment is in closed state.
2. the well pattern structure according to claim 1 for gas drive exploitation deep layer bulk fractured reservoir, which is characterized in that
The first horizontal segment is located at the middle part of formation at target locations, and second horizontal segment is located at the bottom of formation at target locations.
3. the well pattern structure according to claim 1 for gas drive exploitation deep layer bulk fractured reservoir, which is characterized in that
Two branch horizontal well further includes：The first lower curved section, the connection for connecting the straight well section and the first horizontal segment are described straight
Second lower curved section of well section and second horizontal segment.
4. the well pattern structure according to claim 1 for gas drive exploitation deep layer bulk fractured reservoir, which is characterized in that
The predetermined depth difference by the thickness of oil-containing part in oil-gas reservoir and oil-containing part in the process of development move down at a distance from determined.
5. the well pattern structure according to claim 1 for gas drive exploitation deep layer bulk fractured reservoir, which is characterized in that
When the first horizontal segment and second horizontal segment project on horizontal plane, the first horizontal segment and second level
Angle between section is between 0 degree to 30 degree.
6. the well pattern structure according to claim 1 for gas drive exploitation deep layer bulk fractured reservoir, which is characterized in that
The medium of the gas injection well injection includes at least one of following：Carbon dioxide, nitrogen, natural gas, phlogisticated air.
7. the well pattern structure according to claim 1 for gas drive exploitation deep layer bulk fractured reservoir, which is characterized in that
The length of second horizontal segment is more than the length of the first horizontal segment.
8. the well pattern structure according to claim 1 for gas drive exploitation deep layer bulk fractured reservoir, which is characterized in that
The position of the gas injection well is located at the height above sea level peak of oil-gas reservoir.
9. the well pattern structure according to claim 1 for gas drive exploitation deep layer bulk fractured reservoir, which is characterized in that
In the first state, the first horizontal segment is located at the middle part of the oil-containing part of oil-gas reservoir, and second horizontal segment is located at oil
The bottom of the oil-containing part of gas reservoir or the top containing water section.
10. the well pattern structure according to claim 1 for gas drive exploitation deep layer bulk fractured reservoir, feature exists
In in a second state, second horizontal segment is located at the oil-containing part of oil-gas reservoir, and the first horizontal segment is located at oil-gas reservoir
Gassiness part or oil-containing part and gassiness part intermediate zone.
11. a kind of well pattern structure for gas drive exploitation deep layer bulk fractured reservoir according to described in claim 1 is opened
Forwarding method, which is characterized in that include the following steps：
Gas medium is injected into the gas injection well；
First horizontal segment in two branch horizontal well is opened, the second horizontal segment closing, to pass through the first level
Section exploits oil-gas reservoir；
When reaching preset condition for the moment, the first horizontal segment in two branch horizontal well to be closed, the second horizontal segment is opened, from
And oil-gas reservoir is exploited by second horizontal segment.
12. the development approach according to claim 11 for gas drive exploitation deep layer bulk fractured reservoir, feature exists
In the preset condition one includes at least following one：There is the gassiness portion in gas channeling phenomenon, oil-gas reservoir in the first horizontal segment
Divide the oil-containing part for moving downward and contacting in the first horizontal segment, oil-gas reservoir to move downward and touches second horizontal segment.
13. the development approach according to claim 11 for gas drive exploitation deep layer bulk fractured reservoir, feature exists
In further comprising the steps of：
When reaching preset condition two, stop injecting gas medium into the gas injection well, and by two branch horizontal well
In the second horizontal segment closing.
14. the development approach according to claim 11 for gas drive exploitation deep layer bulk fractured reservoir, feature exists
In the preset condition two includes at least following one：There is the gassiness portion in gas channeling phenomenon, oil-gas reservoir in second horizontal segment
Divide and moves downward contact second horizontal segment.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2017212038028 | 2017-09-20 | ||
| CN201721203802 | 2017-09-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108316910A true CN108316910A (en) | 2018-07-24 |
| CN108316910B CN108316910B (en) | 2024-04-26 |
Family
ID=62902610
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810213553.3A Active CN108316910B (en) | 2017-09-20 | 2018-03-15 | Well pattern structure for gas-driven development of deep block-shaped fractured reservoir and development method |
| CN201820354069.8U Expired - Fee Related CN208057104U (en) | 2017-09-20 | 2018-03-15 | The well pattern structure of deep layer bulk fractured reservoir is developed for gas drive |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820354069.8U Expired - Fee Related CN208057104U (en) | 2017-09-20 | 2018-03-15 | The well pattern structure of deep layer bulk fractured reservoir is developed for gas drive |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN108316910B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109339752A (en) * | 2018-11-19 | 2019-02-15 | 中国石油天然气股份有限公司大港油田分公司 | Oil reservoir development method based on the phlogisticated air displacement of reservoir oil |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108316910B (en) * | 2017-09-20 | 2024-04-26 | 中国石油大学(北京) | Well pattern structure for gas-driven development of deep block-shaped fractured reservoir and development method |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB660161A (en) * | 1949-03-16 | 1951-10-31 | In Situ Gases Inc | Generation of synthesis gas by subterranean gasification |
| CA2067848A1 (en) * | 1991-05-02 | 1992-11-03 | Philippe Corlay | Method for hot fluid stimulation of an effluent production zone adjacent to an aquiferous zone |
| CN103670271A (en) * | 2013-12-30 | 2014-03-26 | 中国石油集团渤海钻探工程有限公司 | Dual-cycle relay coal bed well drilling method |
| CN204252974U (en) * | 2014-10-16 | 2015-04-08 | 中国石油天然气股份有限公司 | A kind of horizontal well well structure for the block fractured reservoir exploitation of deep layer |
| CN105041288A (en) * | 2015-07-13 | 2015-11-11 | 中国石油大学(北京) | Fractural diverting acid-fracturing method for carbonate oil-gas reservoirs |
| CN105114048A (en) * | 2015-08-17 | 2015-12-02 | 中国石油大学(华东) | Horizontal well staged fracturing oil production method through injection and production in same well |
| CN105649588A (en) * | 2014-11-12 | 2016-06-08 | 中国石油天然气股份有限公司 | Method for exploiting heavy oil reservoir through steam-assisted gravity drainage (SAGD) |
| CN208057104U (en) * | 2017-09-20 | 2018-11-06 | 中国石油大学(北京) | The well pattern structure of deep layer bulk fractured reservoir is developed for gas drive |
-
2018
- 2018-03-15 CN CN201810213553.3A patent/CN108316910B/en active Active
- 2018-03-15 CN CN201820354069.8U patent/CN208057104U/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB660161A (en) * | 1949-03-16 | 1951-10-31 | In Situ Gases Inc | Generation of synthesis gas by subterranean gasification |
| CA2067848A1 (en) * | 1991-05-02 | 1992-11-03 | Philippe Corlay | Method for hot fluid stimulation of an effluent production zone adjacent to an aquiferous zone |
| CN103670271A (en) * | 2013-12-30 | 2014-03-26 | 中国石油集团渤海钻探工程有限公司 | Dual-cycle relay coal bed well drilling method |
| CN204252974U (en) * | 2014-10-16 | 2015-04-08 | 中国石油天然气股份有限公司 | A kind of horizontal well well structure for the block fractured reservoir exploitation of deep layer |
| CN105649588A (en) * | 2014-11-12 | 2016-06-08 | 中国石油天然气股份有限公司 | Method for exploiting heavy oil reservoir through steam-assisted gravity drainage (SAGD) |
| CN105041288A (en) * | 2015-07-13 | 2015-11-11 | 中国石油大学(北京) | Fractural diverting acid-fracturing method for carbonate oil-gas reservoirs |
| CN105114048A (en) * | 2015-08-17 | 2015-12-02 | 中国石油大学(华东) | Horizontal well staged fracturing oil production method through injection and production in same well |
| CN208057104U (en) * | 2017-09-20 | 2018-11-06 | 中国石油大学(北京) | The well pattern structure of deep layer bulk fractured reservoir is developed for gas drive |
Non-Patent Citations (1)
| Title |
|---|
| 李炼民;赵坤山;夏力;: "应用水平井注水提高老油田的采收率", 国外油田工程, no. 11 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109339752A (en) * | 2018-11-19 | 2019-02-15 | 中国石油天然气股份有限公司大港油田分公司 | Oil reservoir development method based on the phlogisticated air displacement of reservoir oil |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108316910B (en) | 2024-04-26 |
| CN208057104U (en) | 2018-11-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110608024B (en) | Volume fracturing method for improving filling efficiency of micro-support system by deep shale gas | |
| Stalkup Jr | Status of miscible displacement | |
| CN102777157B (en) | CO2 drive oil-gas-water separate well injecting oil reservoir mixing drive development method | |
| CN109958411B (en) | Horizontal well cluster perforation staged fracturing method | |
| CN107218024B (en) | The method of adjustment of multilayer low permeability sandstone reservoir high water-cut stage rhombic inverted nini-spot well pattern | |
| Sahin et al. | A quarter century of progress in the application of CO2 immiscible EOR project in Bati Raman heavy oil field in Turkey | |
| CN102080526A (en) | Method for extracting gas from bedding level fractured well of ground coal seam roof | |
| CN105317407B (en) | A kind of development approach of ultra-high water cut stage Untabulated reservoirs | |
| CN109209306A (en) | Oil in Super-low Permeability compact oil reservoir horizontal well infuses CO2The asynchronous method for supplementing energy of handling up | |
| CN206309375U (en) | The improvement well pattern structure of rhombic inverted nini-spot well pattern | |
| CN106437642A (en) | Fractured reservoir horizontal well injection-production asynchronous exploitation method | |
| CN104929597B (en) | A kind of horizontal well chemical flooding recovery method | |
| CN109958418A (en) | A kind of umbellate form EGS system for improving heat exchange area and adopting heat flow | |
| CN105298452A (en) | Oil reservoir three-dimensional gas injection method and well pattern structure | |
| Bi et al. | Geological characteristics and co-exploration and co-production methods of Upper Permian Longtan coal measure gas in Yangmeishu Syncline, Western Guizhou Province, China | |
| WO2015054267A2 (en) | Systems and methods for enhancing steam distribution and production in sagd operations | |
| CN110306965A (en) | A kind of method for increasing for coal bed gas low yield wellblock | |
| CN105587300B (en) | Oil production method for horizontal well | |
| CN207093050U (en) | A kind of gas drive well pattern structure of high water cut rate high inclination-angle LOW PERMEABILITY RESERVOIR | |
| CN208057104U (en) | The well pattern structure of deep layer bulk fractured reservoir is developed for gas drive | |
| CN112302608B (en) | Horizontal well before-pressure injection fluid development method based on three-dimensional fracturing well pattern | |
| CN204252974U (en) | A kind of horizontal well well structure for the block fractured reservoir exploitation of deep layer | |
| CN207315337U (en) | Well pattern structure for the exploitation of stratiform LOW PERMEABILITY RESERVOIR | |
| CN109025940A (en) | A kind of CO for compact oil reservoir2Pressure break displacement of reservoir oil integration oil production method | |
| CN105545272B (en) | The oil production method of extra-low permeability water-sensitive reservoir/compact reservoir |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |