CN211115944U - Production well crack simulation system - Google Patents
Production well crack simulation system Download PDFInfo
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- CN211115944U CN211115944U CN201921665314.8U CN201921665314U CN211115944U CN 211115944 U CN211115944 U CN 211115944U CN 201921665314 U CN201921665314 U CN 201921665314U CN 211115944 U CN211115944 U CN 211115944U
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Abstract
The utility model provides a producing well crack analog system. The system may include: the device comprises a shell, a first cover plate, a second cover plate, a first rock plate, a second rock plate and a propping agent, wherein the shell is provided with a through cavity which is provided with a first opening and a second opening; the first cover plate covers the first opening and comprises M groups of pore passages, and each group of pore passages comprises a first outer pore passage and a first pressure measuring pore passage; the second cover plate covers the second opening and comprises N groups of pore passages, and each group of pore passages comprises a second outer pore passage and a second pressure measuring pore passage; the first rock plate is positioned on one side in the cavity, is connected with the first cover plate and is provided with M first inner pore channels; the second rock plate is positioned on the other side in the cavity, is connected with the second cover plate and is provided with N second inner pore channels; the proppant is arranged in a laying belt which is formed by the cavity, the first rock plate and the second rock plate in a surrounding way. The utility model discloses beneficial effect includes: the device has simple structure and scientific and reasonable design; the simulation of gas-liquid fluid in the production well can be realized; the experimental support can be provided for prediction of the dynamic pressure field of the gas well.
Description
Technical Field
The utility model relates to an unconventional oil and gas reservoir production increase transformation technical field especially relates to a production well crack analog system.
Background
In order to increase clean energy supply, optimize and adjust an energy structure and meet the requirements of rapid development of economic society, continuous improvement of the living standard of people and green low-carbon environment construction, the shale gas exploration and development strength and depth are inevitably improved on the basis of great breakthrough in the former period. However, due to the influence of geological characteristics of the shale reservoir, the stable production capacity after the horizontal well pressure of the shale gas is poor, and the yield is decreased quickly. In order to meet the demand of capacity construction, the gap of decreasing the productivity of the gas well at the early stage is usually made up by increasing the number of drilling wells. Because the distance between the later-stage development well and the bottom of the earlier-stage production well is often short, the later-stage development well is influenced by factors such as a pressure drop funnel formed by the earlier-stage production well and the development of natural shale cracks, inter-well communication between the later-stage development well and the earlier-stage production well is caused in the production-increasing transformation process of the later-stage development well, and further the gas production effect of the earlier-stage production well and the transformation effect of the fracturing transformation well are influenced.
Currently, research aiming at gas-liquid two-phase flow simulation in a fracture is carried out by a numerical model and a well testing model of coupling of shaft gas-liquid two-phase flow and stratum seepage; in the field of indoor experiments, simulation evaluation is only carried out on flow characteristics of multiphase flow in cracks under different scale conditions (macro-scale natural cracks and micro-scale cracks), and no physical simulation experiment evaluation device for flow interference in cracks under the condition of hydraulic cracks-natural cracks and multi-scale cracks exists, for example, no production well crack simulation device for physical simulation experiment of flow interference in cracks under the condition of hydraulic cracks-natural cracks and multi-scale cracks exists.
SUMMERY OF THE UTILITY MODEL
To the not enough that exist among the prior art, the utility model aims to solve one or more problems that exist among the above-mentioned prior art. For example, one of the objectives of the present invention is to provide a fracture simulation system for a production well, which is used to simulate natural fracture development and gas-liquid two-phase conditions in the production well.
In order to achieve the above object, the utility model provides a production well crack simulation system. The system may include: the shell is provided with a through cavity, a first opening and a second opening which face each other are formed in the outer surface of the shell by the cavity, the shell is also provided with an inlet channel and an outlet channel which communicate the outside with the cavity and face each other, and the axes of the inlet channel and the outlet channel are vertical to the axis of the cavity; the first cover plate covers the first opening, M groups of pore passages distributed along a first direction are arranged on the first cover plate, each group of pore passages comprise a first outer pore passage and a first pressure measuring pore passage which penetrate through two plate surfaces of the cover plate, M is an integer larger than 1, and the first direction is the direction from the inlet channel to the outlet channel; the second cover plate covers the second opening, N groups of pore passages distributed along the first direction are arranged on the second cover plate, each group of pore passages comprises a second outer pore passage and a second pressure measuring pore passage which penetrate through two plate surfaces of the cover plate, and N is an integer greater than 1; the first rock plate is positioned on one side in the cavity, one plate surface of the first rock plate is connected with the plate surface of the first cover plate covering the first opening, M first inner pore channels which are distributed along the first direction and can correspond to the first outer pore channels are arranged on the first rock plate, the first inner pore channels penetrate through the two plate surfaces of the first rock plate, and the axes of the first outer pore channels and the first inner pore channels which are in corresponding relation are positioned on the same straight line and jointly form a first pipeline connecting pore channel; the second rock plate is positioned on the other side in the cavity, one surface of the second rock plate is connected with the surface of the second cover plate covering the second opening, the second rock plate and the first rock plate face each other, N second inner pore channels which are distributed along the first direction and can correspond to the second outer pore channels are arranged on the second rock plate, the second inner pore channels penetrate through the two surfaces of the second rock plate, and the axes of the second outer pore channels and the second inner pore channels which are in corresponding relation in pair are on the same straight line and jointly form a second pipeline connecting pore channel; the cavity, the first rock plate and the second rock plate enclose a laying belt, and an inlet channel and an outlet channel of the shell are communicated with the laying belt.
According to an exemplary embodiment of the present invention, the system may further comprise a proppant disposed in the layup belt.
According to an exemplary embodiment of the present invention, the first cover plate and the housing may be connected to each other by a plurality of first fixing members, and the second cover plate and the housing may be connected to each other by a plurality of second fixing members.
According to an exemplary embodiment of the present invention, be connected through a plurality of third mounting between first apron and the first rock plate, be connected through a plurality of fourth mounting between second apron and the second rock plate.
According to an exemplary embodiment of the present invention, the system may further include a base capable of placing the housing and a lifting mechanism for supporting the base, the lifting mechanism including at least two lifting columns connected to different positions of the bottom surface of the base.
According to an exemplary embodiment of the invention, the first and second rock plates and the adjacent wall of the housing cavity are each sealable by a seal.
According to an exemplary embodiment of the present invention, the first and second rock plates may be artificially etched rough surfaces on both surfaces facing each other.
According to an exemplary embodiment of the present invention, the system may further comprise a heating unit, which is capable of heating the housing.
According to an exemplary embodiment of the invention, the heating unit comprises a heating jacket, the housing being arrangeable within the heating jacket.
According to an exemplary embodiment of the present invention, the number of M and N may be the same.
According to an exemplary embodiment of the present invention, the first outer bore and the first inner bore may have the same bore diameter, and the second outer bore and the second inner bore may have the same bore diameter.
Compared with the prior art, the beneficial effects of the utility model can include: the device has simple structure and scientific and reasonable design; the simulation of gas-liquid fluid in the production well can be realized; the experimental support can be provided for the prediction technology of the dynamic pressure field of the gas well.
Drawings
The above and other objects and features of the present invention will become more apparent from the following description taken in conjunction with the accompanying drawings, in which:
FIG. 1 shows a schematic cross-sectional view of a fracture height-width plane of a fracture simulation system for a production well of the present invention;
fig. 2 shows a top view of the first cover plate of the present invention;
fig. 3 shows a top view of the housing of the invention;
figure 4 shows a schematic view of the base and support post of the present invention;
description of the main reference numerals:
10-shell, 11-cavity, 12-inlet channel, 13-outlet channel, 14-groove, 15-shell connecting pore channel; 20-a first cover plate, 21-a first outer pore channel, 22-a first pressure measuring pore channel and 23-a cover plate connecting pore channel; 30-a second cover plate, 31-a second outer hole channel, 32-a second pressure measuring hole channel; 40-a first rock plate, 41-a first inner bore hole; 50-a second rock plate, 51-a second inner bore; 60-laying a belt; 71-a first fixture, 72-a second fixture, 73-a third fixture, 74-a fourth fixture; 80-a base; 90-support column.
Detailed Description
Hereinafter, the production well fracture simulation system of the present invention will be described in detail with reference to the accompanying drawings and exemplary embodiments. The utility model discloses a first, second, third and fourth do not show precedence order, only are used for distinguishing each other.
In an exemplary embodiment of the present invention, the production well fracture simulation system is capable of simulating an artificial propped fracture.
As shown in fig. 1, the production well fracture simulation system may include:
a housing 10, a first cover plate 20, a second cover plate 30, a first rock plate 40 and a second rock plate 50.
The casing 10 may have a through cavity 11 defining first and second openings facing each other on the outer surface of the casing, as shown in fig. 3, the casing 10 may be further provided with an inlet passage 12 and an outlet passage 13 communicating the outside with the cavity and facing each other, the axes of the inlet passage 12 and the outlet passage 13 are perpendicular to the axis of the cavity 11, the casing 10 may be made of a steel material, such as 06cr19ni10, the inlet passage 12 and the outlet passage 13 may respectively constitute an inlet end and an outlet end of the production well simulation system, and as shown in fig. 3, the casing 10 may be provided with a hole at the center of both end surfaces in the length direction to form a fluid inlet passage (i.e., the inlet passage 12) and a fluid outlet passage (i.e., the outlet passage 13) of the simulation production well fracture simulation system, which hole may have a size of 8mm (bore diameter) × 50mm (length), for example only.
The first cover plate 20 covers the first opening of the housing 10, and the first cover plate 20 may be connected to the housing 10 by a plurality of first fixing members 71, which may include fastening bolts, and the number of the fastening bolts may be determined according to specific situations. The first cover plate 20 may be provided with M sets of holes distributed along a first direction, and each set of holes includes a first outer hole 21 and a first pressure measuring hole 22 penetrating through two plate surfaces of the first cover plate 20. M is an integer greater than 1, and can be specifically set according to requirements, such as 3-10, and further such as 5. The first direction is the direction from said inlet channel 12 to the outlet channel 13.
The second cover plate 30 covers the second opening of the housing 10, the second cover plate 30 may also be connected to the housing 10 through a plurality of second fixing members 72, the second fixing members 72 may include fastening bolts, and the number of the second fastening bolts 72 may be determined according to specific situations, N groups of ducts distributed along the first direction may be disposed on the second cover plate, each group of ducts includes a second outer duct 31 and a second pressure measuring duct 32 penetrating through two plate surfaces of the second cover plate 30, where N is an integer greater than 1, and may be specifically set according to a requirement, for example, 5. as shown in fig. 1, 5 groups of 10 ducts may be disposed on the first and second cover plates along the length direction, and each duct may have a size of 5mm (aperture) × 30mm (length).
The first rock 40 is located at one side of the cavity 11 and one surface of the first rock is connected to the surface of the first cover plate 20 covering the first opening. The first rock plate 40 is provided with M first inner pore channels 41 which are distributed along a first direction and can respectively correspond to the first outer pore channels 21, the first inner pore channels 41 penetrate through two plate surfaces of the first rock plate 40, and the axes of the first outer pore channels 21 and the first inner pore channels 41 which are in corresponding relation are on the same straight line. The first rock 40 may be sealed to its adjacent or contacting cavity wall, such as by a sealant, such as a dynamic sealant. The first cover plate 20 and the first rock plate 40 may be connected by a plurality of third fixing members 73, the third fixing members 73 may include fastening bolts, and the number of the third fastening bolts 73 may be determined according to specific situations.
The second rock plate 50 is located at the other side of the cavity 11 and one surface of the second rock plate is connected to the surface of the second cover plate 30 covering the second opening. The first rock plate and the second rock plate are respectively distributed on two sides of the cavity 11, and the plate surfaces of the first rock plate and the second rock plate face each other. The second rock plate 50 is provided with N second inner pore channels 51 which are distributed along the first direction and can respectively correspond to the second outer pore channels 31, the second inner pore channels 51 penetrate through two plate surfaces of the second rock plate, and the axes of the second outer pore channels 31 and the second inner pore channels 51 which are in corresponding relation in pair are on the same straight line. The second rock 50 may be sealed to its adjacent or contacting cavity wall, such as by a sealant, such as a dynamic sealant. The second cover plate 30 and the second rock plate 50 may be connected by a plurality of fourth fixing members 74, the fourth fixing members 74 may include fastening bolts, and the number of the third fastening bolts 74 may be determined according to circumstances.
The first and second rock plates and the cavity enclose a layup strip 60. The inlet and outlet passages 12, 13 of the housing communicate with the layup belt 60.
In this embodiment, the system may further include proppant, which may be disposed in the layup belt 60.
In this embodiment, the first and second rock plates may be used to simulate the effects on the production well when fracturing fractures are present on both the left and right sides of the main fracture of the well under formation conditions.
In this embodiment, two facing surfaces of the first and second rock plates may be artificially etched rough surfaces.
In this embodiment, the first outer duct 21 and the first inner duct 41 in a corresponding relationship may together form a first pipeline connecting duct; the second outer bore 31 and the second inner bore 51 in a corresponding relationship may together constitute a second pipe connecting bore. The pipeline connected with the first pipeline connecting hole and the pipeline connected with the second pipeline connecting hole can be high-pressure-resistant pipelines, and the pipelines can be further provided with regulating valves, such as switch valves. The outer diameter of the pressure-resistant pipeline can be 5mm, the inner diameter can be 3mm, and the maximum pressure-bearing capacity can be 5 MPa.
In this embodiment, the first cover plate 20 and the second cover plate 30 may be the same or similar, and the arrangement of the outer hole channels and the pressure measuring holes on the two cover plates 2 may be the same or different, and may be determined according to actual situations.
Fig. 2 shows a schematic top view of the first cover plate (in this case, the cover plate is not mounted on the housing, and is horizontally disposed), and as shown in fig. 2, the first cover plate 20 may further be provided with a plurality of cover plate connecting holes 23 penetrating through the cover plate.
Fig. 3 shows a schematic top view of the housing 10 (when the cover is not mounted on the housing and an opening of the housing faces upward), and as shown in fig. 3, the housing 10 may further be provided with a plurality of housing connecting openings 15 corresponding to the respective cover connecting openings 23. When the first cover plate 20 is placed over the first opening of the housing 10, the respective openings 23 of the first cover plate 20 and the respective openings 15 of the housing may face each other one by one, and the first fixing member 71 may be inserted into the corresponding openings 23 and 15 to connect the first cover plate 20 and the housing 10. Similarly, the second cover plate 30 and the other side of the housing may also be provided with corresponding connecting holes, and may be connected by the second fixing member 72, and the second fixing member 72 may include a fastening bolt.
In this embodiment, the cavity opening shown in fig. 3 may be connected to the first cover plate. As shown in fig. 3, grooves 14 may be formed on the contact surface of the housing 10 and the first cover plate 20, and sealing may be performed between the housing 10 and the first cover plate 20 by sealing gaskets placed in the grooves 14. Similarly, the contact surface of the housing 10 and the second cover plate may be provided with a groove, and the sealing between the housing 10 and the second cover plate 20 may be achieved by a sealing gasket placed in the groove.
In this embodiment, the fracture simulation system for a production well may further include a base 80 and a support column 90 as shown in FIG. 4. The housing 10 can be placed on the base 80, the base 80 can be supported by a plurality of supporting columns 90, the supporting columns 90 can be hydraulic full-automatic lifting columns, the number of the supporting columns 90 is at least two, for example, in the case that the bottom of the base is rectangular, the number of the supporting columns can be four, and four lifting columns can be respectively arranged at four corners of the bottom of the base.
In this embodiment, the system may further include a heating unit capable of heating the housing 10. The heating unit may include a heating jacket, and the maximum heating temperature of the heating jacket may be 150 ℃.
In this embodiment, the system may further comprise a pressure monitoring unit which may comprise an inlet pressure gauge and an outlet pressure gauge.
Wherein the inlet pressure gauge is capable of monitoring the pressure of fluid flowing into the generated well fracture simulation system; the first inlet pressure gauge may be provided in the inlet passage 12 of the housing 10 or on a line connected to the inlet passage 12.
The outlet pressure gauge is capable of monitoring the pressure of fluid flowing from the generating well fracture simulation system; the outlet end pressure gauge may be provided on the outlet passage 13 of the housing 10 or a line connected to the outlet passage 13.
In this embodiment, the pressure monitoring unit may further include a plurality of first pressure sensors and a plurality of second pressure sensors, and is configured to test pressure changes of the production well along the length direction of the fracture under the simulated inter-fracture interference.
The first pressure sensors are disposed in the first pressure measurement hole 22 and can monitor the pressure in the pressure measurement hole, and the number of the first pressure sensors may be the same as the number of the first pressure measurement holes 22.
The second pressure sensors are disposed in the second pressure measurement hole 32 and can monitor the pressure in the pressure measurement hole, and the number of the second pressure sensors may be the same as the number of the second pressure measurement holes 32.
In the present embodiment, as just one example, the size of each of the housing 10, the first cover plate 20 and the second cover plate 30 may be 550mm × 340mm × 50mm, the size of the cavity of the housing 10 may be 450mm × 240mm × 30mm, and the size of the groove 14 on the housing 10 may be 10mm × 500mm × 290 mm.
To sum up, the utility model discloses a producing well crack analog system's advantage can include:
(1) compare in the seam internal gas liquid two-phase flow analogue means that present indoor experiments are in use, the utility model discloses a set up the pore at production well crack analog system apron surface (seam height-seam long face), can be used for the simulation to real reservoir environment natural crack development degree.
(2) Compare in the crack seam interior gas-liquid two-phase flow analogue means of commonly used, the utility model discloses the full-automatic lift post of accessible fluid pressure type comes quick adjustment production well crack analog system relative height, simulation when being favorable to realizing horizontal well section box difference or different well arrangement cloth seam mode.
(3) The utility model discloses can be used for the simulation of the interior gas-liquid two-phase flow of seam and interpeak flow, can provide the experiment support for gas well dynamic pressure field prediction technique.
(4) The utility model discloses can effectively simulate different reservoir temperature, natural shale rock plate, natural fracture development degree, cloth well mode, cloth seam mode, proppant type and sanding volume, production system etc. under the condition the seam flow interference condition, and then evaluate the above-mentioned factor combined action under the seam pressure distribution, the production well in the change condition under different production system (moisture content in the seam) conditions, can be used for revealing the major control factor who influences the interwell interference.
(5) The utility model discloses a device structural design scientific and reasonable, experiment convenient operation, each component part of device have withstand voltage and the leakproofness that satisfies experiment test requirement.
Although the present invention has been described above in connection with exemplary embodiments, it will be apparent to those skilled in the art that various modifications and changes may be made to the exemplary embodiments of the present invention without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A fracture simulation system for a production well, the system comprising a housing, a first cover plate, a second cover plate, a first rock plate, and a second rock plate, wherein,
the shell is provided with a through cavity, a first opening and a second opening which face each other are formed in the outer surface of the shell by the cavity, the shell is also provided with an inlet channel and an outlet channel which communicate the outside with the cavity and face each other, and the axes of the inlet channel and the outlet channel are vertical to the axis of the cavity;
the first cover plate covers the first opening, M groups of pore passages distributed along a first direction are arranged on the first cover plate, each group of pore passages comprise a first outer pore passage and a first pressure measuring pore passage which penetrate through two plate surfaces of the cover plate, M is an integer larger than 1, and the first direction is the direction from the inlet channel to the outlet channel;
the second cover plate covers the second opening, N groups of pore passages distributed along the first direction are arranged on the second cover plate, each group of pore passages comprises a second outer pore passage and a second pressure measuring pore passage which penetrate through two plate surfaces of the cover plate, and N is an integer greater than 1;
the first rock plate is positioned on one side in the cavity, one plate surface of the first rock plate is connected with the plate surface of the first cover plate covering the first opening, M first inner pore channels which are distributed along the first direction and can correspond to the first outer pore channels are arranged on the first rock plate, the first inner pore channels penetrate through the two plate surfaces of the first rock plate, and the axes of the first outer pore channels and the first inner pore channels which are in corresponding relation are positioned on the same straight line and jointly form a first pipeline connecting pore channel;
the second rock plate is positioned on the other side in the cavity, one surface of the second rock plate is connected with the surface of the second cover plate covering the second opening, the second rock plate and the first rock plate face each other, N second inner pore channels which are distributed along the first direction and can correspond to the second outer pore channels are arranged on the second rock plate, the second inner pore channels penetrate through the two surfaces of the second rock plate, and the axes of the second outer pore channels and the second inner pore channels which are in corresponding relation in pair are on the same straight line and jointly form a second pipeline connecting pore channel;
the cavity, the first rock plate and the second rock plate enclose a laying belt, and an inlet channel and an outlet channel of the shell are communicated with the laying belt.
2. The production well fracture simulation system of claim 1, further comprising a proppant disposed in the paved zone.
3. The fracture simulation system of claim 1, wherein the first cover plate is coupled to the housing by a plurality of first fasteners, and the second cover plate is coupled to the housing by a plurality of second fasteners.
4. The system of claim 1, wherein the first cover plate is coupled to the first rock plate by a plurality of third fasteners, and the second cover plate is coupled to the second rock plate by a plurality of fourth fasteners.
5. The fracture simulation system of claim 1, further comprising a base on which the housing can be placed, and a lifting mechanism for supporting the base, the lifting mechanism comprising at least two lifting columns attached to a bottom surface of the base at different locations.
6. The production well fracture simulation system of claim 1, wherein the first and second rock plates are sealed to the adjacent wall of the housing cavity by seals.
7. The production well fracture simulation system of claim 1, wherein both faces of the first and second rock plates facing each other are artificially etched asperities.
8. The production well fracture simulation system of claim 1, further comprising a heating unit capable of heating the housing.
9. The production well fracture simulation system of claim 8, wherein the heating unit comprises a heating jacket, the housing being disposable within the heating jacket.
10. The production well fracture simulation system of claim 1, wherein the number of M and N is the same.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921665314.8U CN211115944U (en) | 2019-09-30 | 2019-09-30 | Production well crack simulation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921665314.8U CN211115944U (en) | 2019-09-30 | 2019-09-30 | Production well crack simulation system |
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| Publication Number | Publication Date |
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| CN211115944U true CN211115944U (en) | 2020-07-28 |
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| CN201921665314.8U Active CN211115944U (en) | 2019-09-30 | 2019-09-30 | Production well crack simulation system |
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| CN (1) | CN211115944U (en) |
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- 2019-09-30 CN CN201921665314.8U patent/CN211115944U/en active Active
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