CN208057104U - The well pattern structure of deep layer bulk fractured reservoir is developed for gas drive - Google Patents
The well pattern structure of deep layer bulk fractured reservoir is developed for gas drive Download PDFInfo
- Publication number
- CN208057104U CN208057104U CN201820354069.8U CN201820354069U CN208057104U CN 208057104 U CN208057104 U CN 208057104U CN 201820354069 U CN201820354069 U CN 201820354069U CN 208057104 U CN208057104 U CN 208057104U
- Authority
- CN
- China
- Prior art keywords
- horizontal segment
- gas
- well
- oil
- 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.)
- Expired - Fee Related
Links
- 238000002347 injection Methods 0.000 claims abstract description 51
- 239000007924 injection Substances 0.000 claims abstract description 51
- 238000011161 development Methods 0.000 claims abstract description 16
- 238000004519 manufacturing process Methods 0.000 claims abstract description 14
- 239000007789 gas Substances 0.000 claims description 143
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 8
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 8
- 230000015572 biosynthetic process Effects 0.000 claims description 7
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 6
- 239000003345 natural gas Substances 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 3
- 239000001569 carbon dioxide Substances 0.000 claims description 3
- 230000005465 channeling Effects 0.000 abstract description 12
- 239000003921 oil Substances 0.000 description 42
- 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
- 230000007423 decrease Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- 230000002045 lasting effect Effects 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000010586 diagram Methods 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
- GCNLQHANGFOQKY-UHFFFAOYSA-N [C+4].[O-2].[O-2].[Ti+4] Chemical compound [C+4].[O-2].[O-2].[Ti+4] GCNLQHANGFOQKY-UHFFFAOYSA-N 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007812 deficiency Effects 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
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 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
- 239000013589 supplement Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/30—Specific pattern of wells, e.g. optimising the spacing of wells
- E21B43/305—Specific pattern of wells, e.g. optimising the spacing of wells comprising at least one inclined or horizontal well
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/164—Injecting CO2 or carbonated water
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/166—Injecting a gaseous medium; Injecting a gaseous medium and a liquid medium
- E21B43/168—Injecting a gaseous medium
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Earth Drilling (AREA)
Abstract
The utility model discloses a kind of well pattern structures 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 utility model is related to oil and gas development fields, more particularly to a kind of to develop deep layer bulk fractured reservoir for gas drive
Well pattern structure.
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.
Utility model content
In order to overcome the drawbacks described above of the prior art, the technical problem to be solved is that provide for the utility model embodiment
It is a kind of for gas drive exploitation deep layer bulk fractured reservoir well pattern structure and, can reduce crestal gas injection develop Fractured
The possibility of gas channeling phenomenon occurs when oil-gas reservoir.
The specific technical solution of the utility model embodiment 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.
The technical solution of the utility model 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 need not carry out continuous perforation and well completion operations with the reduction of oil-containing part height above sea level in landing surface and to straight well, and
Two branch horizontal wells have first horizontal segment and the second horizontal segment simultaneously, with well control large storage capacity, can link up many cracks
Feature can save a large amount of drilling well investment compared to large number of straight well.With conventional straight well as injection well, level
Well is compared as the well pattern structure of producing well, and the utility model can occur to carry out closing well to it after has channeling in first horizontal segment
Operation, continues to produce, can efficiently reduce the gas production in oil well in this way, and need not open using the second horizontal segment
New horizontal well is bored, 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 in any way disclosed by the utility model
Range.In addition, the shape and proportional sizes etc. of each component in figure are only schematical, it is used to help the reason to the utility model
Solution is not the specific shape and proportional sizes for limiting each component of the utility model.Those skilled in the art is new in this practicality
Under the introduction of type, various possible shapes and proportional sizes can be selected to implement the utility model as the case may be.
Fig. 1 is the structure for the well pattern structure for developing deep layer bulk fractured reservoir in the utility model embodiment for gas drive
Schematic diagram.
Fig. 2 is injection production profile figure when first horizontal segment produces in the utility model embodiment.
Fig. 3 is injection production profile figure when the second horizontal segment produces in the utility model embodiment.
Fig. 4 is for same oil-gas reservoir in the utility model 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
In conjunction with the description of attached drawing and specific embodiment of the present invention, the utility model can be clearly understood
Details.But specific embodiment of the present utility model described here, it is only used for explaining the purpose of this utility model, without
It can be understood as being limitations of the present invention in any way.Under the introduction of the utility model, technical staff is contemplated that
Arbitrary possible deformation based on the utility model, these are regarded as belonging to the scope of the utility model.It needs to illustrate
It is that when element is referred to as " being set to " another element, it can be directly on another element or there may also be placed in the middle
Element.When an element is considered as " connection " another element, it can be directly to another element or can
Centering elements can be existed simultaneously.Term " installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be mechanical connection or
Electrical connection, can also be the connection inside two elements, 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.Made herein
Term " vertical ", " horizontal ", "upper", "lower", "left", "right" and similar statement simply to illustrate that mesh
, it is 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 reality
The structural schematic diagram for developing the well pattern structure of deep layer bulk fractured reservoir with gas drive is used in new embodiment, as shown in Figure 1,
This for gas drive exploitation deep layer bulk fractured reservoir well pattern structure may include：Two branch horizontal wells 2, two branch horizontal wells
2 include the straight well section 3 extended downwardly from ground, the first horizontal segment 5 being connected with straight well section 3 and the second horizontal segment 7, the first water
The position of flat 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；
Gas injection 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 blocky for gas drive exploitation deep layer
The well pattern structure of fractured reservoir at least has two states, and in the first state, first horizontal segment 5 is to produce section, and second
Horizontal segment 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 reality
Injection production profile figure when being produced with first horizontal segment in new embodiment 5, as shown in Fig. 2, the position of gas injection well 1 can be located at oil
The height above sea level peak of gas reservoir, the gas injection well 1 are generally straight well.Gas medium is injected into oil-gas reservoir by gas injection well 1, the medium
Can be carbon dioxide, nitrogen, natural gas, phlogisticated air etc..During gas medium injects, at this point, being used for gas drive
The well pattern structure of exploitation deep layer bulk fractured reservoir is under the first state.In the first state, first horizontal segment 5 is
Section is produced, which is 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 portion of oil-gas reservoir
Points 9 bottom or the top containing water section 10.In this state, the oil-containing part 9 of oil-gas reservoir is carried out by first horizontal segment 5
Exploitation, 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 that the utility model is real
Injection production profile figure when the second horizontal segment 7 produces in example is applied, as shown in figure 3, in a second state, the second horizontal segment 7 is made a living
Section is produced, the 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 of oil-gas reservoir
The intermediate zone of part 9 and gassiness part 8.In this state, the oil-containing part 9 of oil-gas reservoir is opened by the second horizontal segment 7
It adopts, first 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 developed may be used in the well pattern structure for gas drive exploitation deep layer bulk fractured reservoir in the application
Journey, the process may comprise steps of：Gas medium is injected into gas injection well first, which can be titanium dioxide
Carbon, nitrogen, natural gas, phlogisticated air etc. pass through the injection of gas medium so that in two branch horizontal wells 2 in first horizontal segment 5
Crude oil in square oil-gas reservoir is moved down by gas medium displacement.Then the first horizontal segment 5 in two branch horizontal wells 2 is opened
It opens, the closing of the second horizontal segment 7, to be exploited to oil-gas reservoir by first horizontal segment 5, the second horizontal segment 7 may position at this time
In the top containing water section 10 of oil-gas reservoir, it is therefore desirable to be at closed state.With the exploitation of oil-gas reservoir crestal gas injection
Lasting to carry out, the height above sea level of oil-containing part 9 will appear decline phenomenon in stratum so that correspond to oil-containing in first horizontal segment 5 originally
The preforation tunnel of part 9 transfers to correspond to gassiness part 8, therefore, will be in two branch horizontal wells when reaching preset condition for the moment
First horizontal segment 5 is closed, and enters first horizontal segment 5 to avoid gas medium, the second horizontal segment 7 is opened, to pass through the second water
The 7 pairs of oil-gas reservoirs of flat section are exploited.Preset condition one at least may include following one：First horizontal segment 5 occur gas channeling phenomenon,
Gassiness part in oil-gas reservoir moves downward contact first horizontal segment 5, the oil-containing part in oil-gas reservoir moves downward and touches institute
State second horizontal segment 7 etc..With continuing for oil-gas reservoir crestal gas injection exploitation, the height above sea level of oil-containing part 9 continues in stratum
Phenomenon now drops, finally, gassiness part 8 drop to contact the second horizontal segment 7, oil-containing part 9 drop to the second horizontal segment 7 with
Under, therefore, when reaching preset condition two, preset condition two at least may include following one：There is has channeling in second horizontal segment 7
Gassiness part 8 in phenomenon, oil-gas reservoir moves downward second horizontal segment 7 of contact etc., stops injecting gas Jie into gas injection well 1
Matter, and the second horizontal segment 7 in two branch horizontal wells is closed, and then stop exploitation.For fractured reservoirs, basement rock is situated between
Matter is the major reservoir spaces of fluid, and fracture medium is main seepage channel.Laboratory test is research shows that due to fracture medium
Permeability contrast between basement rock medium is huge, such as uses waterflooding extraction, water that can flow to production rapidly along fractuer direction
Well is small so as to cause sweep area, in this way, water drive recovery percent of reserves is only 14.8% or so.In crestal gas injection exploitation, due to gas
Body has lower density compared to in-place oil, can assemble at the top of oil reservoir under gravity and transport gradually downward
It moves, to significantly increase the swept volume of oil reservoir, therefore, gas injection development recovery percent of reserves can reach 41.3%, significantly larger than
Therefore water drive recovery percent of reserves selects to carry out in such a way that gas injection well 1 injects gas medium to oil-gas reservoir in the present invention
Exploit deep layer bulk fractured reservoirs.Fig. 4 is that same oil-gas reservoir is opened using different well pattern structures in the utility model
The effect contrast figure given, as shown in figure 4, compared being used in the utility model in conjunction with numerical simulation for oil-gas reservoir example calculation
Well pattern structure, straight well flooding pattern structure, the straight well of gas drive exploitation deep layer bulk fractured reservoir are that gas injection well horizontal well is made a living
The development effectiveness of the well pattern structure three of well is produced, as can be seen from Figure 4：In the utility model deep layer block is developed for gas drive
The final recovery percent of reserves of the well pattern structure of shape fractured reservoir is 54.5%, is note compared to straight well flooding pattern structure, straight well
Gas well horizontal well is the well pattern structure of producing well, and recovery ratio 33.1% and 13.2% has been respectively increased.
The well pattern structure for gas drive exploitation deep layer bulk fractured reservoir in the application has the advantages that：With
Traditional straight well flooding pattern is compared, and the well pattern structure for gas drive exploitation deep layer bulk fractured reservoir in the application is not required to
Continuous perforation and well completion operations, and two branch's water are carried out to straight well with the reduction of 9 height above sea level of oil-containing part in landing surface
Horizontal well 2 has first horizontal segment 5 and the second horizontal segment 7 simultaneously, has the characteristics that well control large storage capacity, can link up many cracks,
Compared to large number of straight well, a large amount of drilling well investment can be saved.With conventional straight well as injection well, horizontal well conduct
The well pattern structure of producing well is compared, and the utility model can occur to carry out closing well operation to it after has channeling in first horizontal segment 5,
Continue to produce using the second horizontal segment 7, the gas production in oil well can be efficiently reduced in this way, and it is new to spud in
Horizontal well, to both increase crude output also save drilling well investment.In the utility model deep layer is developed for gas drive
The well pattern structure of blocky fractured reservoir can realize the relatively usury use to subterranean resource, with certain economic implications and ring
Protect meaning.
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 utility model, although the embodiment disclosed by the utility model is such as
On, but the content is only to facilitate the embodiment for understanding the utility model and using, it is new to be not intended to limit this practicality
Type.Any those skilled in the art of the present invention are not departing from the spirit and scope disclosed by the utility model
Under the premise of, any modification and variation, but the patent of the utility model can be made in the formal and details of embodiment
Protection domain must be still subject to the scope defined in the appended claims.
Claims (10)
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.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2017212038028 | 2017-09-20 | ||
| CN201721203802 | 2017-09-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208057104U true CN208057104U (en) | 2018-11-06 |
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 Before (1)
| 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 |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN108316910B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108316910A (en) * | 2017-09-20 | 2018-07-24 | 中国石油大学(北京) | The well pattern structure and development approach of deep layer bulk fractured reservoir are developed for gas drive |
Families Citing this family (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 |
Family Cites Families (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 |
| FR2676091B1 (en) * | 1991-05-02 | 1993-07-30 | Inst Francais Du Petrole | METHOD FOR STIMULATING AN EFFLUENT-PRODUCING AREA ADJACENT TO AN AQUIFERED AREA WITH A HOT FLUID. |
| CN103670271B (en) * | 2013-12-30 | 2016-03-09 | 中国石油集团渤海钻探工程有限公司 | Two-way Cycle relay-type coal seam drilling method |
| CN204252974U (en) * | 2014-10-16 | 2015-04-08 | 中国石油天然气股份有限公司 | Horizontal well type structure for deep block fractured reservoir development |
| CN105649588B (en) * | 2014-11-12 | 2018-08-14 | 中国石油天然气股份有限公司 | Method for exploiting heavy oil reservoir by using SAGD (steam assisted gravity drainage) |
| CN105041288A (en) * | 2015-07-13 | 2015-11-11 | 中国石油大学(北京) | Carbonate oil-gas reservoir fracture steering acid fracturing method |
| CN105114048B (en) * | 2015-08-17 | 2017-10-13 | 中国石油大学(华东) | A kind of staged fracturing of horizontal well single-well injection-production oil production method |
| 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 |
-
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
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108316910A (en) * | 2017-09-20 | 2018-07-24 | 中国石油大学(北京) | The well pattern structure and development approach of deep layer bulk fractured reservoir are developed for gas drive |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108316910B (en) | 2024-04-26 |
| CN108316910A (en) | 2018-07-24 |
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 | |
| CN102606129B (en) | Method and system for thin interbed oilfield development | |
| CN110359899B (en) | Method for improving effective reconstruction volume through repeated fracturing of shale gas horizontal well | |
| CN101876241B (en) | Method for improving water drive recovery ratio of positive rhythm thick oil layer | |
| Sahin et al. | A quarter century of progress in the application of CO2 immiscible EOR project in Bati Raman heavy oil field in Turkey | |
| CN107387053A (en) | A kind of method that big passage major fracture cooperates with pressure break with complicated seam net | |
| CN107218024B (en) | Method for adjusting rhombus inverted nine-point well pattern in high water-cut period of multilayer low-permeability sandstone oil reservoir | |
| CN112392472B (en) | Method and device for determining integrated development mode of shale and adjacent oil layer | |
| CN105422068A (en) | Method for developing heavy oil reservoir by combining staged volume fracturing and fracturing filling of horizontal well | |
| US20150204171A1 (en) | Carbon dioxide energy storage and enhanced oil recovery | |
| CN105672978A (en) | Horizontal moving type five-point horizontal well three-dimensional well pattern well spacing method | |
| CN106437642A (en) | Injection-production asynchronous mining method for horizontal well of fractured reservoir | |
| 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 | |
| CN105587300B (en) | Oil recovery method for horizontal well | |
| CN208057104U (en) | The well pattern structure of deep layer bulk fractured reservoir is developed for gas drive | |
| CN113006749B (en) | Coal series associated resource one-well multipurpose coordinated mining method | |
| CN207315337U (en) | Well pattern structure for layered low-permeability reservoir development | |
| Zhao et al. | Performance improvement of CO2 flooding using production controls in 3D areal heterogeneous models: Experimental and numerical simulations | |
| CN204252974U (en) | Horizontal well type structure for deep block fractured reservoir development | |
| CN105545272B (en) | Oil extraction method for ultra-low permeability water-sensitive reservoir/compact reservoir | |
| RU2513962C1 (en) | Oil deposit development method | |
| CN107624141A (en) | Individual well gas Assisted Gravity Drainage technique for oil recovery | |
| CN114198077A (en) | Method for improving remote well fracture complexity through horizontal well staged fracturing and application of method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181106 |