CN113236182B - Damper and completion structure for improving the axial isolation effect of continuous packer along the wellbore - Google Patents
Damper and completion structure for improving the axial isolation effect of continuous packer along the wellbore Download PDFInfo
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- CN113236182B CN113236182B CN202110720558.7A CN202110720558A CN113236182B CN 113236182 B CN113236182 B CN 113236182B CN 202110720558 A CN202110720558 A CN 202110720558A CN 113236182 B CN113236182 B CN 113236182B
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- 230000000694 effects Effects 0.000 title claims abstract description 40
- 238000002955 isolation Methods 0.000 title 1
- 238000012856 packing Methods 0.000 claims abstract description 56
- 230000001965 increasing effect Effects 0.000 claims description 47
- 239000002245 particle Substances 0.000 claims description 15
- 238000003466 welding Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 32
- 230000015572 biosynthetic process Effects 0.000 abstract description 3
- 238000009434 installation Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 description 26
- 239000003921 oil Substances 0.000 description 19
- 230000005465 channeling Effects 0.000 description 14
- 239000012530 fluid Substances 0.000 description 13
- 238000002347 injection Methods 0.000 description 11
- 239000007924 injection Substances 0.000 description 11
- 239000007788 liquid Substances 0.000 description 11
- 238000000034 method Methods 0.000 description 10
- 230000002708 enhancing effect Effects 0.000 description 9
- 230000035699 permeability Effects 0.000 description 9
- 238000007789 sealing Methods 0.000 description 6
- 238000000926 separation method Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 239000003623 enhancer Substances 0.000 description 3
- 239000008398 formation water Substances 0.000 description 3
- 241000361919 Metaphire sieboldi Species 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 239000010779 crude oil Substances 0.000 description 2
- 210000000476 body water Anatomy 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002349 well water Substances 0.000 description 1
- 235000020681 well water Nutrition 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/122—Multiple string packers
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
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- Mining & Mineral Resources (AREA)
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- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
A resistor-increasing device capable of improving axial packing effect of a continuous packer in a well bore and a well completion structure are provided, wherein the resistor-increasing device is of a cylindrical structure as a whole, a central mounting hole for mounting a central tubular column is formed in the axial center of the resistor-increasing device, and one or more filling channels consistent with the axial direction of the cylinder are formed in the inner side and/or the outer side of the resistor-increasing device. According to the invention, the resistor-increasing device with smaller flow area is arranged in the shaft, so that the flow of formation produced water in the shaft ring can be reduced, and the flow-guiding grooves are arranged at the two ends of the resistor-increasing device, so that when the resistor-increasing devices are used as standard components in series, the resistor-increasing devices can be installed on the central pipe column in series according to actual demands on site, and the filling channels of the resistor-increasing devices are not required to be aligned, so that the resistor-increasing device is very convenient for on-site assembly and use, the on-site installation efficiency can be improved, and the flow of formation produced water in the shaft can be more accurately limited.
Description
Technical Field
The invention belongs to the technical field of oil and gas well exploitation, and relates to a resistance increasing device capable of improving the axial packing effect of a continuous packing body in a shaft along the shaft, a method capable of improving the axial packing effect of the continuous packing body in the shaft along the shaft, and a well completion structure capable of improving the axial packing effect of the continuous packing body in the shaft along the shaft.
Background
In the field of oil and gas well exploitation technology, a shaft of an oil and gas well generally penetrates multiple sections of stratum, and because permeability of each section of stratum is generally inconsistent, viscosity of stratum water is far smaller than that of crude oil to be exploited, and under the same bottom hole pressure difference, a local stratum with high permeability often produces a large amount of stratum water. The common water control method is to make water control by putting a flow control pipe column (or water control pipe column) with balanced flow into the well. When the flow control pipe column is arranged in the shaft for controlling water and increasing oil, the stratum water axially flows in the shaft annular space along the shaft annular space, so that the flow control pipe column is ineffective in flow control. The well bore annulus is sealed, so that the production of formation water is controlled, the channeling of the formation water in the well bore annulus is reduced, and the method is an effective method for improving the crude oil recovery ratio. The existing method for sealing the well bore annulus so as to realize water control mainly comprises two modes of water control by an expansion packer and water control by a continuous sealing body.
The expansion packer has a certain application due to a simple structure and low cost. However, the device has the defect that in the first aspect, the diameter of the device is larger than that of the central pipe column (or is close to the diameter of a shaft), so that a pipe string formed by connecting a plurality of central pipe columns is easy to generate a phenomenon of blocking when the device is in a well. To solve the problem of a well being blocked, it is necessary to reduce the number of inflatable packers provided on the string, for example, one inflatable packer per 50-100 meters interval, so as to pack the well bore into a plurality of individual separation units of 50-100 meters in length. However, the wellbore annulus remains in communication inside each of the separation units, and there is still a cross-flow problem which results in less than optimal oil recovery from the unit, and in extreme cases, if there is a large water volume inside the separation unit (e.g., communicating groundwater through a fracture), the oil recovery from the separation unit will become lower. In the second aspect, the expansion packer is usually a prefabricated member, and cannot perfectly adapt to complex well conditions such as inconsistent well diameter, non-centering of a central tubular column, uneven well wall surface and the like, so that formation water channeling between different separation units cannot be thoroughly prevented. And thirdly, after the liquid-swelling packer is fully swelled, the liquid-swelling packer is tightly attached to the well wall and cannot be pulled out. And a gap is reserved between the resistance increasing device and the well wall, so that the resistance increasing device can be pulled out.
The continuous packer body water control is a new oil and gas well water control method in recent years. Referring to Chinese patent invention CN2009102507912, CN2014100135988, CN2019100846588, CN2019104892759 and the like, the basic principle of the method is that packing particles are filled in a shaft to form a continuous packer, and a micro-channel inside the continuous packer formed by micro-pores among the packing particles has an anti-channeling effect on production fluid, so that the production of stratum water is reduced, and the method can meet the actual application requirements (such as irregular well diameter, sleeve leakage, deformation and cement ring channeling of the shaft, annular space outside an old screen pipe, annular space outside a perforated pipe and the like) under various well conditions. However, the method has some defects in application, on one hand, since the continuous packer body inevitably has micro-channels for oil and gas to pass through, the micro-channels are not suitable to have small resistance to the flow of the production fluid to ensure the fluidity of the production fluid so as to ensure the smooth production of the oil and gas, on the other hand, since the fluidity of water is far higher than that of the oil, for the scene that the interval between each section of stratum is smaller (for example, 2-5 meters), the produced water of the stratum with high water yield at the local well section in the well shaft still flows to the well section of the adjacent stratum structure along the annular space of the well shaft through the micro-channels in the continuous packer body due to the large flowing water quantity. That is, the produced water in the wellbore still has a large channeling phenomenon, so that the oil recovery rate is not optimized.
Specifically, the conventional use range of the packer particles is 16-100 mesh (particle size range of 0.15-1.18 mm), and the permeability of the corresponding continuous packer is 20D-300D, and even 20D is still high relative to the permeability of the formation. For example, a 6-in multilayer vertical well is run into a 3-1/2in water control screen, filled with continuous packer particles with a permeability of 40D, and a2 meter length of continuous packer ring (i.e., the continuous packer corresponding to the blind section between two screens) has a fluid channeling capacity of 29 square/day at a production pressure differential of 1 Mpa. And (3) filling a flow control screen pipe with the permeability of 5-1/2in into a certain 8-1/2in horizontal well, and filling continuous packer particles with the permeability of 20D, wherein the cross flow of a continuous packer ring with the length of 2 meters is 45 square/day under the production pressure difference of 1 Mpa. Therefore, even if the continuous packer is used for controlling water, the inter-layer axial channeling amount in the well bore annular space is still larger, and the packing effect is further improved.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a resistance increasing device and a resistance increasing device which have the advantages of simple structure, convenient operation, high reliability and good effect of limiting the flow quantity of a cross flow, do not influence the filling of continuous packer particles in a production section, and can improve the axial packing effect of the continuous packer in a shaft, and a well completion structure capable of improving the axial packing effect of the continuous packer in the shaft.
In order to achieve the above purpose, the present invention provides the following technical solutions:
The resistor-increasing device capable of improving the axial packing effect of a continuous packer in a well bore is of a cylindrical structure, a central mounting hole for mounting a central tubular column is formed in the axial center of the resistor-increasing device, one or more filling channels consistent with the axial direction of the cylinder are formed in the inner side and/or the outer side of the resistor-increasing device, and the sum of effective flow areas of the filling channels is 1/20-1/2 of the sectional area of the cylinder.
Further, the filling channels of the resistor booster are multiple, and the filling channels are distributed symmetrically in a circumferential mode based on the axis of the cylinder.
Furthermore, annular grooves communicated with each filling channel are formed at two ends of the resistor, the annular grooves at two ends are consistent in size and consistent in position relative to the axis of the cylinder, and the effective flow guiding area of the annular grooves is not smaller than the flow passing area of each filling channel.
Further, the cross section of the filling channel inside the resistor is one or more of a circle, an ellipse, a sector and a circular sector.
Further, the cross-section shape of the filling channel at the outer side of the resistance increasing device is one or more of semicircle, fan-shaped and round angle/chamfer fan-shaped, and the outer side surface of the filling channel is communicated with the annulus of the shaft.
In order to achieve the above purpose, the present invention further provides the following technical solutions:
The resistance increasing device comprises the resistance increasing device and a central pipe column, wherein the resistance increasing device and the central pipe column penetrate through a central mounting hole of the resistance increasing device and are fixedly connected with the resistance increasing device.
Further, the resistance increasing device and the central pipe column are connected and fixed in one or more of welding, bolt fixing or clamping piece fixing modes.
Further, the central pipe column is a short blind pipe;
Further, the two ends of the short section blind pipe are provided with a flow control filter pipe string.
In order to achieve the above purpose, the present invention provides the following technical solutions:
A well completion structure capable of improving axial packing effect of a continuous packer in a well bore comprises a plurality of center pipe columns which are arranged in the well bore and connected end to end, wherein the continuous packer is arranged in an annulus between the center pipe column and a wall of the well bore, and one or more of the center pipe columns are provided with a resistance increasing device as described above.
In order to achieve the above purpose, the present invention provides the following technical solutions:
a well completion structure capable of improving the axial packing effect of a continuous packer in a well bore comprises a plurality of center pipe columns which are arranged in the well bore and connected end to end, wherein the continuous packer is arranged in an annulus between the center pipe columns and the wall of the well bore, and one or more center pipe columns are resistance increasing devices.
The invention relates to a resistance increasing device and a well completion structure which can improve the axial packing effect of a continuous packer along a shaft, firstly, through arranging the resistor with smaller flow area in the well bore and filling the packing particles, the channeling of stratum produced water in the well bore ring space can be reduced. Secondly, because the whole annular space is filled with the continuous packer body, no space is reserved for storing mud and sand produced by the earthworm cavity, the earthworm cavity is unlikely to be formed at the two ends of the packer, and further the problems of well wall collapse, mud migration and the like are not caused. And when the plurality of resistance-increasing devices are used as standard components in series, the plurality of resistance-increasing devices can be installed on the central pipe column in series according to actual demands on site, and filling channels of the plurality of resistance-increasing devices are not required to be aligned, so that the device is very convenient to assemble and use on site, the site installation efficiency can be improved, and the channeling flow of stratum produced water in a shaft can be more accurately limited.
Drawings
FIG. 1 is a front cross-sectional view of a resistor enhancer for enhancing the axial packing effect of a continuous packing along a wellbore in accordance with an embodiment of the present invention;
FIG. 2 is a left side view of a resistor booster for improving the axial packing effect of a continuous packing along a wellbore in accordance with an embodiment of the present invention;
FIG. 3 is a schematic diagram of the overall structure of a resistor increasing device for increasing the axial packing effect of a continuous packer along a shaft in an embodiment of the invention;
FIG. 4 is a cross-sectional view of the overall structure of a resistor enhancing the axial packing effect of a continuous packing along a wellbore in accordance with an embodiment of the present invention;
FIG. 5 is a front cross-sectional view of another embodiment of the present invention of a resistor booster for enhancing the axial packing effect of a continuous packing along a wellbore;
FIG. 6 is a left side view of another resistor enhancing the axial packing effect of a continuous packing along a wellbore in accordance with an embodiment of the present invention;
FIG. 7 is a schematic diagram of the overall structure of another resistor for improving the axial packing effect of a continuous packer along a wellbore according to an embodiment of the invention;
FIG. 8 is a cross-sectional view of an overall construction of another resistor enhancing the axial packing effect of a continuous packing along a wellbore in accordance with an embodiment of the present invention;
FIG. 9 is a schematic overall structure of a resistor and resistor enhancing device for enhancing the axial sealing effect of a continuous sealing body along a shaft in a specific application in the shaft in an embodiment of the invention.
FIG. 10 is a schematic diagram of the overall structure of a conventional injection and production system according to an embodiment of the present invention;
FIG. 11 is a schematic diagram of an overall construction of an injection and production system employing a resistor and/or resistor enhancing the axial packing effect of a continuous packer along a wellbore in accordance with an embodiment of the invention.
Detailed Description
Specific embodiments of a resistor and completion structure for enhancing the axial packing effect of a continuous packing along a wellbore are further described below with reference to figures 1 through 9. It should be noted that, the function of the drawings in the specification is limited to more intuitively showing the specific features of the whole or part of the technical scheme disclosed in the embodiment, and the proportion or the dimensional structure thereof is not drawn according to the actual product, so that the technical scheme disclosed in the embodiment cannot be limited, and the resistance increaser and the completion structure for improving the axial sealing effect of the continuous sealing body along the shaft are not limited to the description of the following embodiments.
Example 1:
The embodiment provides a resistance increasing device capable of improving the axial packing effect of a continuous packer in a well bore.
As shown in fig. 1-8, the resistor-increasing device 1 is in a cylindrical structure or an approximately cylindrical structure, and is arranged in the shape structure to facilitate the resistor-increasing device 1 to be assembled with a central pipe column as a sleeve structure and then be put into a shaft 2. The axial center of the resistance booster 1 is provided with a center mounting hole 11 (namely, the center mounting hole 11 of the sleeve structure) for mounting a center pipe column, one or more filling channels 12 consistent with the axial direction are arranged inside and/or outside the resistance booster 1, and the sum of effective flow areas of the filling channels 12 is 1/20-1/2 of the cross section area of the cylinder. The effective flow area of the filling channel 12 refers to the cross-sectional area of the filling channel 12. Specifically, in the stage of filling the packing particles, the filling liquid carrying the packing particles mainly flows through the filling channel 12 of the resistor 1 and the outer annular space thereof, the packing particles are conveyed to the deep part of the shaft 2 and gradually accumulated from the deep part of the shaft 2 to the shallow part to form a continuous packing body, and in the production stage, the production liquid in the annular space of the shaft 2 also mainly flows through the outer annular space of the resistor 1 and the filling channel 12 of the resistor 1.
Specifically, the number of the filling channels 12 is at least 1, but may be plural. When the number of the filling channels 12 of the resistor adder 1 is plural, the plurality of filling channels 12 are distributed symmetrically in circumference based on the axis of the cylinder. The resistor 1 may be provided with only the internal filling channel 12 or the external filling channel 12, or may be provided with both filling channels 12.
As shown in fig. 1-4, the filling channel 12 of the resistor 1 is arranged inside, the cross section of the filling channel is one or more of round, oval, fan-shaped and round fan-shaped, and of course, the filling channel can also be in other similar shapes, but the filling channel adopts a round or fan-shaped structure, thereby not only being convenient for processing, but also having smaller resistance to filling liquid.
As shown in fig. 5-8, the filling channel 12 of the resistor-increasing device 1 is arranged on the outer side, the cross section of the filling channel is one or more of semicircle, fan-shaped, round angle/chamfer fan-shaped, and the outer side surface of the filling channel 12 is communicated with the annular space of the shaft 2. The round angle/chamfer sector is characterized in that two corners of the sector, which are close to the axis, are round angles, and two corners, which are far away from the axis, are chamfers, and the round angle/chamfer sector aims at reducing the resistance to filling liquid by the two round angles at the inner side, and reducing the blocking probability when the round angle at the outer side is an arc surface. The "communication" means that the outer side surface of the filling channel 12 is in an open structure, and is connected with the annular space of the shaft 2 into a whole, and after filling, an integrated continuous packer can be formed.
Preferably, the two ends of the resistor-increasing device 1 are provided with annular grooves 13 communicated with each filling channel 12, and the annular grooves 13 at the two ends are consistent in size (including the diameter of the ring, the width and the depth of the groove) and consistent in position relative to the axis of the cylinder (the circle center of the ring is on the axis). The purpose of the annular groove 13 is to make it possible to selectively determine the corresponding number of resistors 1 to be used in series in the field, depending on the resistance value to be produced, when the pre-manufactured resistor 1 is used as a standard. When two or more of the resistors 1 are used in series, if the annular groove 13 is not provided, the filling channel 12 of the resistor 1 needs to be completely aligned for use, otherwise, the filling channel 12 is blocked, and filling liquid cannot be injected into the well bore 2. By arranging the annular grooves 13, the annular grooves 13 of two adjacent resistors 1 can form diversion trenches, so that the filling channels 12 of two adjacent resistors 1 are communicated. In order to ensure the communication effect, the effective flow guiding area of the annular groove 13 should be not smaller than the flow passing area of the individual filling channel 12. Specifically, the number of the annular grooves 13 may be one or more, depending on the number and arrangement of the filling channels 12. If the arrangement of the filling channels 12 is two circles, two annular grooves 13 with different diameters need to be provided. By arranging the annular grooves 13, when a user installs a plurality of resistance enhancers 1 on a central pipe column (such as a blind pipe), the alignment problem of a diversion channel is not needed to be considered, so that the working efficiency can be improved, and meanwhile, the resistance value additionally increased for the channeling of the production fluid in the shaft 2 after the casting can be flexibly and accurately set through the free combination of the plurality of resistance enhancers 1.
If the filling channel 12 is provided only outside, the annular groove 13 may not be provided as a simplified structure, and the annulus outside the resistor 1 may be used as a diversion channel. This embodiment mode should be regarded as an equivalent technical scheme of the present embodiment.
Example 2:
The embodiment provides a resistance increasing device capable of improving the axial packing effect of a continuous packer in a shaft 2.
The resistance increasing device comprises the resistance increasing device 1 and a central pipe column according to the embodiment 1, wherein the central pipe column penetrates through the central mounting hole 11 of the resistance increasing device 1 and is fixedly connected with the resistance increasing device 1. Specifically, the resistor-increasing device 1 and the central pipe column are connected and fixed by one or more of welding, bolt fixing or clamping piece fixing modes. The central string is a short blind pipe as an alternative embodiment, and of course, the central string may also be a screen or other type of string, for example, the resistor-increasing means 1 is arranged at one or both ends of the screen.
The technical scheme of the embodiment aims to make the resistor-increasing device 1 and the central pipe column into standard components, so that the standard resistor-increasing device can be directly used as a central pipe column with a resistor-increasing function for well-down construction without site assembly, and is more convenient for construction operation.
Example 3:
The embodiment provides a specific application mode of the resistor-expander/resistor-expander device in embodiment 1 or 2.
(1) Splicing the resistance increaser 1 and a central pipe column to form a resistance increasing device, or directly adopting a prefabricated resistance increasing device, splicing the resistance increasing device and other screen pipe 3 isocentric pipe columns into a pipe string according to preset quantity and positions, and putting the pipe string into a shaft 2;
(2) Filling liquid carrying packing particles into the well bore 2 through the well bore 2 annulus, wherein the packing liquid carrying the packing particles is gradually accumulated from inside to outside in the well bore 2 annulus to form a continuous packing body 4 as shown in fig. 9, and the continuous packing body 4 is simultaneously filled with a filling channel 12 of the resistance increasing device and an outer annular space region of the resistance increasing device;
(3) When the produced fluid and produced water in the annular space of the well bore 2 pass through the area where the resistance increasing device/resistance increasing device is located, the effective flow area of the filling channel 12 is smaller, so that the resistance is larger than that of the area where the resistance increasing device/resistance increasing device is not arranged in the annular space, and the flow rate of the cross flow is smaller.
For example, a certain 8-1/2in horizontal well is filled with a 5-1/2in flow control sieve tube, continuous packer particles with the permeability of 20D are filled, and the flow rate of the continuous packer corresponding to a blind section between two sieve tubes is 45 square/day under the production pressure difference of 1 Mpa. After the resistance increasing device is applied to the temporary well of the 8-1/2in horizontal well, the continuous packer channeling rate corresponding to the blind section between the two sieve tubes is 15 square/day.
Example 4:
this embodiment provides another specific application mode of the resistor-expander/resistor-expander device described in embodiment 1 or 2.
As shown in fig. 10, an injection and production system is provided that includes a water injection well M1 and a production well M2. It can be seen from the figure that, due to the higher permeability of the stratum at C in the figure, more driving fluid (usually stratum water, indicated by black thick lines in the figure) injected into the water injection well M1 enters the oil production well M2 through the stratum at C, which results in higher water content in the produced fluid of the oil production well M2, and also results in lower driving fluid pressure of the stratum at A, B, D, E and lower oil production efficiency due to the channeling of the driving fluid in the wellbore, and the channeling of the driving fluid at A, B, D, E in the wellbore to C. Therefore, the working efficiency of the injection and production system cannot be optimized.
As shown in fig. 11, a completion structure is formed in the water injection well M1 according to the method described in embodiment 3. After the injection, the channeling of the driving liquid injected into the water injection well M1 through the central pipe column in the annular space of the shaft 2 is reduced, the driving liquid in the annular space at the A, B, D, E part cannot (or is less) channeling to the annular space at the C part, so that the driving liquid cannot enter the stratum at the C part, the result is that firstly, the content of water in the stratum at the C part in the oil production well M2 is reduced, secondly, the driving liquid pressure of the stratum at the A, B, D, E part is increased, the oil displacement effect is enhanced, the oil production of the corresponding stratum is increased, and the oil production rate of the injection and production system is optimized.
Example 5:
The embodiment provides a well completion structure capable of improving the axial packing effect of a continuous packer in a well bore, which comprises a plurality of central pipe columns arranged in the well bore and connected end to end, wherein two ends of the central pipe column 4 are provided with a flow control filter pipe string. And a continuous packer is arranged in an annulus between the central pipe column and the wall of the shaft. The difference from the prior art is that in the completion configuration, the one or more center strings are the resistor-enhancing devices of example 1, or the one or more center strings are the resistor-enhancing devices of example 2. It should be noted that the well completion structure provided in this embodiment is not only applicable to a production well, but also applicable to a water injection well.
In the embodiment, the resistance of the fluid produced in the well bore ring can be increased by arranging the resistance increasing device with smaller flow area, so that the fluid produced in the well bore ring can be reduced, and the overall oil extraction rate of the oil well can be improved.
The foregoing is a further detailed description of the invention in connection with the preferred embodiments, and it is not intended that the invention be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the invention, and these should be considered to be within the scope of the invention.
Claims (8)
1. A resistor-increasing device capable of improving axial packing effect of a continuous packer in a well bore is characterized in that the resistor-increasing device is of a cylindrical structure as a whole, a central mounting hole for mounting a central tubular column is formed in the axial center of the resistor-increasing device, one or more filling channels consistent with the axial direction of the cylinder are formed in the inner side and/or the outer side of the resistor-increasing device, and the sum of effective flow areas of the filling channels is 1/20-1/2 of the sectional area of the cylinder;
Wherein the resistor booster is applied in a wellbore annulus filled with packer particles;
the two ends of the resistor booster are respectively provided with an annular groove communicated with each filling channel, the annular grooves at the two ends are consistent in size and consistent in position relative to the axis of the cylinder, and the effective flow guiding area of the annular grooves is not smaller than the flow passing area of each filling channel.
2. The resistor-increasing device capable of improving axial packing effect of continuous packers in a well bore according to claim 1, wherein the resistor-increasing device comprises a plurality of filling channels which are distributed symmetrically in a circumferential direction based on the axis of the cylinder.
3. The resistor-increasing device capable of improving axial packing effect of continuous packers in a well bore according to claim 1, wherein the cross-sectional shape of the filling channel inside the resistor-increasing device is one or more of circular, elliptical, fan-shaped and circular-angle fan-shaped.
4. The resistor-increasing device capable of improving axial packing effect of continuous packers in a well bore according to claim 1, wherein the cross-sectional shape of a filling channel on the outer side of the resistor-increasing device is one or more of semicircular, fan-shaped and round/chamfer fan-shaped, and the outer side surface of the filling channel is communicated with the annular space of the well bore.
5. A resistance increasing device capable of improving axial packing effect of a continuous packer in a well bore is characterized by comprising a resistance increasing device and a central pipe column according to any one of claims 1 to 4, wherein the central pipe column penetrates through a central mounting hole of the resistance increasing device and is fixedly connected with the resistance increasing device.
6. The resistance increasing device capable of improving the axial packing effect of the continuous packer in the well bore according to claim 5, wherein the resistance increasing device and the central pipe column are connected and fixed in one or more of welding, bolt fixing or clamping piece fixing modes.
7. The resistance increasing device capable of improving axial packing effect of continuous packers in a well bore according to claim 5, wherein the central pipe column is a short blind pipe.
8. A well completion structure capable of improving axial packing effect of a continuous packer in a well bore comprises a plurality of center pipe columns which are arranged in the well bore and connected end to end, wherein the continuous packer is arranged in an annulus between the center pipe columns and a wall of the well bore, and the well completion structure is characterized in that one or more center pipe columns are provided with a resistor booster as set forth in any one of claims 1 to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110720558.7A CN113236182B (en) | 2021-06-28 | 2021-06-28 | Damper and completion structure for improving the axial isolation effect of continuous packer along the wellbore |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110720558.7A CN113236182B (en) | 2021-06-28 | 2021-06-28 | Damper and completion structure for improving the axial isolation effect of continuous packer along the wellbore |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113236182A CN113236182A (en) | 2021-08-10 |
| CN113236182B true CN113236182B (en) | 2025-01-24 |
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| CN108533236A (en) * | 2018-06-04 | 2018-09-14 | 中国石油化工股份有限公司 | A kind of tubing string that can implement light granules filling and the aquatic production of sand control control |
| CN217327260U (en) * | 2021-06-28 | 2022-08-30 | 安东柏林石油科技（北京）有限公司 | Resistance increasing device and well completion structure for improving axial packing effect of continuous packing body |
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| US7527095B2 (en) * | 2003-12-11 | 2009-05-05 | Shell Oil Company | Method of creating a zonal isolation in an underground wellbore |
| US7661476B2 (en) * | 2006-11-15 | 2010-02-16 | Exxonmobil Upstream Research Company | Gravel packing methods |
| EP2912260B1 (en) * | 2012-10-26 | 2017-08-16 | ExxonMobil Upstream Research Company | Wellbore apparatus and method for sand control using gravel reserve |
| CN103867181B (en) * | 2012-12-10 | 2018-01-30 | 安东柏林石油科技（北京）有限公司 | The method for carrying out sectional flow control using excluder ring is partly oozed |
| CA2924011A1 (en) * | 2013-10-23 | 2015-04-30 | Halliburton Energy Services, Inc. | Methods for treatment of a subterranean formation |
| CN103726813B (en) * | 2014-01-13 | 2016-05-11 | 安东柏林石油科技（北京）有限公司 | In the outer packing ring of Oil/gas Well filter tubing string, set up the method for packing |
| US9670756B2 (en) * | 2014-04-08 | 2017-06-06 | Exxonmobil Upstream Research Company | Wellbore apparatus and method for sand control using gravel reserve |
| US20170044880A1 (en) * | 2015-08-10 | 2017-02-16 | Charles S. Yeh | Hybrid Sand Control Systems and Methods for Completing a Wellbore with Sand Control |
| CN108756831A (en) * | 2018-05-28 | 2018-11-06 | 中国海洋石油集团有限公司 | A kind of horizontal well control water completion structure of self-adaptation type |
| CN112324403B (en) * | 2019-08-05 | 2022-07-05 | 中国石油天然气股份有限公司 | Well wall resistance increasing oil production method and device for improving energy utilization rate of injected gas |
| CN210738529U (en) * | 2019-09-30 | 2020-06-12 | 东营市瑞丰石油技术发展有限责任公司 | Ultra-light particle horizontal well sectional filling process tool and sectional water control process tool |
| CN211777371U (en) * | 2019-12-19 | 2020-10-27 | 中海油能源发展股份有限公司 | Underground oil-water separation device |
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| CN108533236A (en) * | 2018-06-04 | 2018-09-14 | 中国石油化工股份有限公司 | A kind of tubing string that can implement light granules filling and the aquatic production of sand control control |
| CN217327260U (en) * | 2021-06-28 | 2022-08-30 | 安东柏林石油科技（北京）有限公司 | Resistance increasing device and well completion structure for improving axial packing effect of continuous packing body |
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