CN212837729U - Shale gas horizontal well productivity analogue means - Google Patents
Shale gas horizontal well productivity analogue means Download PDFInfo
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- CN212837729U CN212837729U CN202021443403.0U CN202021443403U CN212837729U CN 212837729 U CN212837729 U CN 212837729U CN 202021443403 U CN202021443403 U CN 202021443403U CN 212837729 U CN212837729 U CN 212837729U
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- sand
- partition plate
- filling box
- horizontal well
- upper cover
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- 239000004576 sand Substances 0.000 claims abstract description 50
- 238000006073 displacement reaction Methods 0.000 claims abstract description 20
- 238000005192 partition Methods 0.000 claims abstract description 20
- 238000004088 simulation Methods 0.000 claims abstract description 15
- 229920006395 saturated elastomer Polymers 0.000 claims abstract description 14
- 238000002347 injection Methods 0.000 claims abstract description 7
- 239000007924 injection Substances 0.000 claims abstract description 7
- 239000002245 particle Substances 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 claims description 2
- 238000003825 pressing Methods 0.000 claims description 2
- 239000012530 fluid Substances 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 3
- 238000009826 distribution Methods 0.000 abstract description 2
- 238000011156 evaluation Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000011234 economic evaluation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model discloses a shale gas horizontal well productivity simulation device, which comprises a displacement system, a sand filling box, a vacuum extractor, a saturated gas injection system and a metering system; a partition plate with holes is arranged in the sand filling box, and a sand body is filled between the partition plate and the upper cover plate and is embedded with a horizontal well model; a wire mesh layer is arranged between the partition plate and the sand body in the sand filling box; a cavity which is positioned below the partition plate and is formed by the partition plate and the sand filling box is a buffer cavity; the vacuum extractor and the saturated gas injection system are communicated with the buffer cavity. The utility model discloses set up the silk screen above the baffle, silk screen and sand body contact, because silk screen itself is network structure, possess more hole and supply the fluid circulation, consequently the fluid along the bottom surface evenly distributed of the sand body, when suction, saturated gas, displacement, whole area of contact is big and the atress is comparatively even everywhere, can reduce suction, saturated gas time, and the distribution effect of silk screen has reduced the shielding of baffle to the sand body simultaneously, and the displacement blind area is few, and the simulation result is more accurate.
Description
Technical Field
The utility model relates to an oil gas development physical simulation experiment field, especially a shale gas horizontal well productivity analogue means.
Background
The horizontal well is a special well with the maximum well inclination angle reaching or approaching 90 degrees, the application of the horizontal well tends to be normalized at present, the oil drainage area of a single-well oil reservoir production unit is greatly increased through drilling of a horizontal well section, and the economic benefit is obvious.
In the development process of oil and gas fields, feasibility evaluation, including economic evaluation, exploitation mode evaluation and the like, is often required, wherein oil and gas production capacity evaluation is an important project. The productivity evaluation of the horizontal well is realized by indoor physical simulation experiments at present, and related devices are already provided. If the utility model CN210217699U is authorized in China, the device can realize the purpose of productivity simulation, but the precision is not high, the use is inconvenient, its sand filling model places on the baffle, and the baffle has the trompil, and displacement fluid flows through this hole after with sand filling model contact, because the part floor area of sand body has been shielded to the sand filling model of baffle contact, lead to filling the sand model bottom and must have the displacement fluid can not contact, can not pass through the blind spot, lead to the gas production decline, influence experiment accuracy. Meanwhile, shale gas needs to be saturated before displacement, the contact area of the gas and sand is reduced due to the shielding effect, and the device is long in saturation time during experiment.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a shale gas horizontal well productivity analogue means for simulating the horizontal well productivity, this device optimizes on prior art, has increased sand body bottom surface and fluidic area of contact, has reduced the displacement blind spot, and it is more convenient to use, and the measuring accuracy is higher.
In order to solve the technical problem, the utility model provides a shale gas horizontal well productivity simulation device, which comprises a displacement system, a sand filling box, a saturated gas injection system and a metering system; a partition plate with holes is arranged in the sand filling box, and a sand body is filled between the partition plate and the upper cover plate and is embedded with a horizontal well model; a wire mesh layer is arranged between the partition plate and the sand body in the sand filling box; a cavity which is positioned below the partition plate and is surrounded by the partition plate and the sand filling box becomes a buffer cavity for ensuring the consistent pressure at each hole of the partition plate; the saturated gas injection system is communicated with the buffer cavity.
According to the present invention, the productivity simulation apparatus further comprises a vacuum pump, and the vacuum pump is communicated with the buffer chamber. The saturation time can be saved by adding a vacuumizing device to vacuumize the sand body and then saturate the sand body.
According to a preferred embodiment of the capacity simulation device of the present invention, the horizontal well model is a hollow structure, and includes a vertical section and a horizontal section; one end of the horizontal section is communicated with the vertical section, and the other end of the horizontal section is closed; one end of the vertical section passes through the upper cover plate to be connected with the metering system, the peripheral side surface of the horizontal section is provided with small holes which are used as channels for the fluid in the sand body to enter the horizontal section,
according to the utility model discloses productivity analogue means's a further embodiment, the horizontal segment outer wall includes the one deck silk screen, prevents that sand body particle migration from blockking up the aperture.
According to the utility model discloses productivity analogue means's a preferred embodiment, the sand pack includes box and upper cover plate, and the box is uncovered case column structure, and it is convenient for install the object in the sand pack with upper cover plate swing joint.
According to the utility model discloses productivity analogue means's a further embodiment, the four corners of upper cover plate respectively has and is equipped with a pneumatic cylinder, and the pneumatic cylinder is connected with hand pump and is used for compressing tightly upper cover plate and box.
The utility model discloses one of them embodiment's beneficial effect is:
the utility model discloses set up the silk screen above the baffle, silk screen and sand body contact, because silk screen itself is network structure, possess more hole and supply the fluid circulation, consequently the fluid along the bottom surface evenly distributed of the sand body, when suction, saturated gas, displacement, whole area of contact is big and the pressure-bearing everywhere is comparatively even, can reduce suction, saturated gas time, and the distribution effect of silk screen has reduced the shielding of baffle to the sand body simultaneously, and the displacement blind area is few, and the simulation result is more accurate.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic diagram of a horizontal well model structure;
in the figure, 1, a sand filling box; 2. vacuumizing device; 3. a hydraulic cylinder; 4. a horizontal well model; 5. a pressure maintaining valve; 6. a drain chamber; 7. a measuring cylinder; 8. a compressor; 9. a displacement pump;
11. a box body; 12. an upper cover plate; 13. a partition plate; 14. a silk screen layer; 15. a buffer chamber; 41. a vertical section; 42. a horizontal segment.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments and accompanying drawings.
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it may not be further defined and explained in subsequent figures.
Referring to fig. 1, fig. 1 is a schematic view of the overall structure of the device. The shale gas horizontal well productivity simulation device comprises a displacement system, a sand filling box 1, a vacuum extractor 2, a saturated gas injection system and a metering system.
The flask 1 includes a box body 11 and an upper cover plate 12. The box body 11 is of a cover-free box-shaped structure and is movably connected with the upper cover plate 12, specifically, four corners of the upper cover plate 12 are respectively provided with a hydraulic cylinder 3, and the hydraulic cylinders 3 are connected with a hand pump and used for tightly pressing the upper cover plate 12 and the box body 11; a partition plate 13 with holes is arranged in the box body 11, a wire mesh layer 14 is arranged on the upper wall close to the partition plate 13, a sand body is filled between the wire mesh layer 14 and the upper cover plate 12, and a horizontal well model 4 is buried in the sand body; the cavity formed by the partition plate 13 and the filling box 1 and positioned below the partition plate 13 is a buffer cavity 15 for ensuring the pressure at each hole of the partition plate 13 to be consistent.
Referring to fig. 2 and fig. 1, fig. 2 is a schematic structural diagram of a horizontal well model. The horizontal well model 4 is of a hollow tubular structure and comprises a vertical section 41 and a horizontal section 42; one end of the horizontal section 42 is communicated with the vertical section 41, the other end is closed, one end of the vertical section 41 penetrates through the upper cover plate 12 to be connected with a metering system, small holes are formed in the peripheral side face of the horizontal section 41 and serve as channels for fluid in sand to enter the horizontal section, and in order to prevent sand particles from moving and blocking the small holes, the outer wall of the horizontal section 41 is further wrapped with a layer of filter screen (not shown in the figure).
With continued reference to fig. 1, the metering system is used for metering the volume of produced gas by using a drainage method, and comprises a pressure stabilizing valve 5, a drainage chamber 6 and a measuring cylinder 7 which are connected in sequence, wherein the inlet of the pressure stabilizing valve 5 is communicated with a vertical section 41 of a horizontal well model 4.
The saturated gas system comprises a gas cylinder and a compressor 8 which are connected in sequence, shale gas is filled in the gas cylinder, and an inlet of the compressor 8 is connected with the gas cylinder.
The displacement system comprises a storage tank and a displacement pump 9, the storage tank is used for containing displacement liquid, and an inlet of the displacement pump 9 is connected with the bottom of the storage tank.
The bottom of the buffer chamber 15 is provided with a through hole, and the inlet of the vacuum extractor 2, the outlet of the compressor 8 and the outlet of the displacement pump 9 are communicated with the through hole.
When the device is used, the device is connected firstly, then the vacuum pump is started to vacuumize the sand body, then the gas in the gas cylinder is pressurized by the compressor and then sent into the buffer cavity to perform gas saturation on the sand body, the saturated pressure is simulated formation pressure, and finally the displacement pump is started to displace the gas in the sand body by the displacement fluid, and the product gas is metered by the metering system.
In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the present invention.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the embodiments of the present invention are all covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (6)
1. A shale gas horizontal well productivity simulation device comprises a displacement system, a sand filling box, a saturated gas injection system and a metering system; the sand filling box is provided with a clapboard with holes, a sand body is filled between the clapboard and the upper cover plate, a horizontal well model is buried in the sand body, the sand filling box is characterized in that,
a wire mesh layer is arranged between the partition plate and the sand body in the sand filling box; a cavity which is positioned below the partition plate and is formed by the partition plate and the sand filling box in a surrounding way is a buffer cavity; the saturated gas injection system is in communication with the buffer chamber.
2. The capacity simulator of claim 1, further comprising a vacuum pump in communication with the buffer chamber.
3. The productivity simulation device according to claim 1 or 2, wherein the horizontal well model is a hollow tubular structure and comprises a vertical section and a horizontal section; one end of the horizontal section is communicated with the vertical section, and the other end of the horizontal section is sealed; one end of the vertical section penetrates through the upper cover plate to be connected with the metering system, and small holes are formed in the peripheral side face of the horizontal section.
4. The productivity simulation device of claim 3, wherein the outer wall of the horizontal section comprises a layer of silk screen to prevent sand particles from moving and blocking the small holes.
5. The productivity simulation device of claim 1 or 2, wherein the sand filling box comprises a box body, the box body is of a uncovered box-shaped structure, and the box body is movably connected with the upper cover plate.
6. The productivity simulation device of claim 5, wherein a hydraulic cylinder is arranged at each of four corners of the upper cover plate, and the hydraulic cylinders are connected with a hand pump and used for pressing the upper cover plate and the box body tightly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021443403.0U CN212837729U (en) | 2020-07-21 | 2020-07-21 | Shale gas horizontal well productivity analogue means |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021443403.0U CN212837729U (en) | 2020-07-21 | 2020-07-21 | Shale gas horizontal well productivity analogue means |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212837729U true CN212837729U (en) | 2021-03-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021443403.0U Expired - Fee Related CN212837729U (en) | 2020-07-21 | 2020-07-21 | Shale gas horizontal well productivity analogue means |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113075109A (en) * | 2021-04-01 | 2021-07-06 | 西南石油大学 | Underground gas storage reservoir drying salting-out blocking injury experiment simulation system and method |
-
2020
- 2020-07-21 CN CN202021443403.0U patent/CN212837729U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113075109A (en) * | 2021-04-01 | 2021-07-06 | 西南石油大学 | Underground gas storage reservoir drying salting-out blocking injury experiment simulation system and method |
| CN113075109B (en) * | 2021-04-01 | 2022-03-15 | 西南石油大学 | Underground gas storage reservoir drying salting-out blocking injury experiment simulation system and method |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210330 |