CN211370373U - Unconventional oil gas pulse resonance synergistic device - Google Patents
Unconventional oil gas pulse resonance synergistic device Download PDFInfo
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- CN211370373U CN211370373U CN201922171949.9U CN201922171949U CN211370373U CN 211370373 U CN211370373 U CN 211370373U CN 201922171949 U CN201922171949 U CN 201922171949U CN 211370373 U CN211370373 U CN 211370373U
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Abstract
The embodiment of the utility model discloses device of unconventional oil gas pulse resonance increase belongs to shale gas exploitation device technical field, and its technical scheme is as follows, including setting up subaerial a plurality of well drills and setting up the sleeve pipe in the well drill, the sleeve pipe outer wall passes through the fixed laminating of well cementation cement with the well drill wall of a well, every all be provided with in the sleeve pipe and be used for knocking the knocking mechanism of intraductal wall in order to send the vibration wave in the shale of layer, the knocking mechanism knocks the frequency of intraductal wall in the sleeve pipe the same with the natural frequency on target layer to solve among the prior art because the shale oil gas mobility in the tight reservoir is relatively poor, utilize horizontal drilling and extensive hydraulic fracturing with the relatively poor problem of effect to tight oil gas development.
Description
Technical Field
The embodiment of the utility model provides a shale gas exploitation device technical field, concretely relates to unconventional oil gas pulse resonance synergy's device.
Background
Shale gas is a kind of unconventional natural gas, and refers to natural gas that exists and is enriched mainly in an adsorbed state and a free state in shale rich in organic substances and interlayers.
The shale gas does not form traps similar to conventional oil gas, has the characteristics of self-generation and self-storage, weather water interface, large-area low-abundance continuous deposit, low porosity, low permeability and the like, has a locally enriched dessert region, generally has no natural productivity or low yield, and can be economically exploited by a horizontal well and large-scale hydraulic fracturing. The formation and enrichment of shale gas have unique characteristics, and the shale gas is often distributed in shale hydrocarbon source rock formations with large thickness and wide distribution in basins. Compared with the conventional natural gas, the shale gas development has the characteristics of long mining life and long production period, most of the gas-producing shale has wide distribution range and large thickness and generally contains gas, so that the shale gas well can stably produce gas for a long time.
Shale gas refers to the sum of natural gas that is free and adsorbed on the shale micropores and surfaces. Shale gas is mostly adsorbed on the surfaces of shale matrix particles, and a small part of shale gas is dissociated in nano-scale or other pores. Shale is generally very dense, with porosity less than 5%, and very low permeability, in the micro darcy scale. Therefore, shale gas mobility in shale reservoirs is very poor, resulting in low shale gas well production. At present, shale gas development relies on horizontal drilling and large-scale hydraulic fracturing to achieve shale gas production. However, the method is limited by the geological complexity of the underground rock stratum, so that many reconstruction effects are unsatisfactory, and a very fast decay period exists, so that shale gas cannot be developed comprehensively and efficiently.
SUMMERY OF THE UTILITY MODEL
Therefore, the embodiment of the utility model provides a device that unconventional oil gas pulse resonance synergized to solve among the prior art because the shale oil gas mobility in the tight reservoir is relatively poor, utilize horizontal drilling and extensive hydraulic fracturing with the relatively poor problem of effect to the development of tight oil gas.
In order to achieve the above object, the embodiment of the present invention provides the following technical solutions:
according to the utility model discloses an aspect the device that unconventional oil gas pulse resonance synergized, unconventional oil gas pulse resonance synergized device set up to the well drilling, and unconventional oil gas pulse resonance synergized device is including setting up the sleeve pipe in the well drilling, and the fixed laminating of sleeve pipe outer wall and well drilling wall of a well, every all be provided with in the sleeve pipe and be used for strikeing the knocking mechanism of intraductal wall of sleeve in order to send the vibration wave in the shale stratum, the frequency that knocking mechanism strikeed intraductal wall of sleeve is the same with the natural frequency of fine and close reservoir.
Further, the striking mechanism includes:
the multi-direction cam is rotatably connected in the shell, a knocking rod is arranged at the position of each protruding part of the multi-direction cam, the knocking rods penetrate through the shell and abut against the inner wall of the sleeve, a return block is fixed at one end, close to the multi-direction cam, of each knocking rod, a spring is sleeved on each knocking rod, one end of each spring is fixed in a through hole, penetrating through the shell, and the other end of each spring abuts against the surface of the return block;
and the driving assembly is used for driving the multidirectional cam in each shell to rotate so as to drive the inner wall of the knocking sleeve.
Further, the driving assembly includes a motor fixed to an upper end of the housing and a camshaft fixed to an output shaft of the motor, the camshaft penetrating through each of the housings and being fixed to each of the multidirectional cams, and bearings are fixed to positions of the camshaft penetrating through both ends of the upper end of each of the housings, outer rings of the bearings being fixed to the housings, and inner rings of the bearings being fixed to the camshaft.
Furthermore, a detection unit for detecting the natural frequency of the shale layer is further arranged in the casing, the detection unit is an acceleration sensor, and the acceleration sensor is used for detecting the reflection acceleration reflected by the vibration wave signal after the casing is knocked.
Furthermore, the upper end of the sleeve is also provided with a controller for controlling the motor to operate, and the controller is connected with a motor circuit.
Furthermore, the casing pipe is fixedly connected with the inner wall of the well through well cementation cement.
Further, the controller is electrically connected with the motor through an armored cable, and the motor is lowered through the armored cable and fixed to a preset position of the casing.
The embodiment of the utility model provides a have following advantage: through the sleeve pipe and the knocking mechanism arranged in the well, when shale gas is developed, the sleeve pipe can be knocked by the knocking rod to send vibration waves into the shale, the natural frequency in the shale is detected according to the detection unit, so that the knocking frequency is the same as the natural frequency of the shale, and the compact reservoir can be induced to resonate in the knocking process, so that the internal structure of the rock is damaged, the cracks and micro cracks of the shale are increased, the permeability of the shale is increased, the physical property of the shale is improved, and the shale gas in the shale is conveniently exploited.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
The structure, ratio, size and the like shown in the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by people familiar with the technology, and are not used for limiting the limit conditions which can be implemented by the present invention, so that the present invention has no technical essential significance, and any structure modification, ratio relationship change or size adjustment should still fall within the scope which can be covered by the technical content disclosed by the present invention without affecting the efficacy and the achievable purpose of the present invention.
Fig. 1 is the embodiment of the utility model provides an improve the positive structure schematic diagram of multiwell of device of tight shale oil and gas reservoir rerum natura.
Fig. 2 is a schematic structural diagram of a single drilling position of the device for improving physical properties of the tight shale oil and gas reservoir provided by the embodiment of the invention.
Fig. 3 is the utility model provides an improve local structural sketch map in the sleeve of device of tight shale oil and gas reservoir rerum natura.
Fig. 4 is the embodiment of the utility model provides an improve the sectional structure schematic diagram in the casing of device of tight shale oil and gas reservoir rerum natura.
In the figure: 1. a sleeve; 2. knocking the arm group; 21. a housing; 22. a multi-directional cam; 23. a knock bar; 24. a bit returning block; 25. a spring; 31. a motor; 32. a camshaft; 33. a bearing; 41. an acceleration sensor; 5. a controller; 6. an armored cable.
Detailed Description
The present invention is described in terms of specific embodiments, and other advantages and benefits of the present invention will become apparent to those skilled in the art from the following disclosure. 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.
Example 1
An unconventional oil and gas pulse resonance synergistic device is shown in figures 1-4 and comprises a plurality of drilled wells arranged to the ground and casings 1 arranged in the drilled wells, wherein 4-6 wells are generally arranged on one horizontal well platform, the outer wall of each casing 1 is fixedly attached to the wall of each drilled well, a knocking mechanism used for knocking the inner wall of each casing 1 to send vibration waves into shale layers is arranged in each casing 1, and the frequency of knocking the inner wall of each casing 1 by the knocking mechanism is the same as the natural frequency of the shale layers. When shale gas in a shale stratum is developed, the casing 1 can be knocked by the knocking mechanism to emit vibration waves into the shale stratum, so that cracks and micro cracks of the shale stratum are increased, the permeability of the shale stratum is increased, the physical properties of the shale stratum are improved, and the shale gas in the shale stratum is conveniently exploited.
Wherein the casing 1 is fixedly connected with the inner wall of the well through pouring well cementation cement, so that the casing 1 can be stably fixed on the inner wall of the well, and simultaneously, gaps between the inner wall of the well and the casing 1 can be completely filled.
The knocking mechanism comprises a plurality of knocking arm groups 2 and a driving assembly, wherein the knocking arm groups 2 are vertically arranged in the sleeve 1, the knocking arm groups 2 comprise a shell 21 arranged at the center of the sleeve 1, a multidirectional cam 22 is rotationally connected in the shell 21, the multidirectional cam 22 is arranged on the basis of the existing cam and respectively provided with a plurality of protruding parts around the axis circumference of the cam, each multidirectional cam 22 is provided with a knocking rod 23 at the position of each protruding part, one end of each knocking rod 23 penetrates through the shell 21 and is abutted to the inner wall of the sleeve 1, one end of each knocking rod 23 close to the multidirectional cam 22 is fixedly connected with a return block 24, the section of each return block 24 is larger than that of each knocking rod 23, a spring 25 is sleeved on each knocking rod 23, one end of each spring 25 is fixedly connected into a through hole of the corresponding knocking rod 23, the other end of each spring is abutted to the surface of the corresponding return block 24, and the driving assembly drives the multidirectional cam 22 in each shell 21 to rotate so as to drive the knocking rod 23 to drive the knocking sleeve The inner wall of the tube 1.
When the driving assembly drives each multidirectional cam 22 to rotate and the protruding part of each multidirectional cam 22 abuts against the return block 24, the knocking rod 23 is pushed to move forwards to impact the inner wall of the casing 1, then the multidirectional cam 22 continuously rotates, the spring 25 pushes the return block 24 to retract so that the end part of the knocking rod 23 is separated from the inner wall of the casing 1, when the multidirectional cam 22 continuously rotates, the protruding part abuts against the return block 24, the knocking rod 23 continuously knocks the inner wall of the casing 1, and the knocking rod 23 continuously knocks the inner wall of the casing 1 to send vibration waves into the shale.
The knocking arm groups 2 are distributed in the shell 21 in an array mode, so that when each knocking rod 23 knocks the casing 1, vibration waves emitted by the knocking rods 23 to the inner wall of a drilling well can be superposed at different positions, and the resonance effect of the target reservoir stratum is enhanced by the vibration enhancement part after superposition, so that cracks and a large number of micro cracks are better generated in the shale stratum, and the permeability of the shale reservoir stratum is further improved.
The driving assembly comprises a motor 31 fixed on the upper end of the sleeve 1 and a cam shaft 32 fixed on the output shaft of the motor 31, wherein the cam shaft 32 penetrates through each shell 21 and is fixed on each multi-directional cam 22, the position of the cam shaft 32 penetrating through two ends of the upper end of each shell 21 is fixed with a bearing 33, the outer ring of the bearing 33 is fixedly connected on the shell 21, the inner ring of the bearing 33 is fixedly connected on the cam shaft 32, in addition, the output shaft of the motor 31 and the cam shaft 32 are mutually fixed in a coupling manner, and each multi-directional cam 22 can be driven to operate when the motor 31 operates.
In addition, a controller 5 for controlling the operation of the motor 31 is arranged at the upper end of the sleeve 1, the controller 5 is in circuit connection with the motor 31 through an armored cable 6, and the operation of the motor 31 can be conveniently controlled through the controller 5.
The motor 31 and the armored cable 6 are fixed to each other and are fixedly placed in the casing 1 through the armored cable 6, so that the motor 31 can be placed at a designated position in the casing 1 as required.
The casing 1 is further provided with a detection unit for detecting the natural frequency of the shale layer, the detection unit is an acceleration sensor 41, the acceleration sensor 41 is fixedly connected above the motor 31, and the acceleration sensor 41 is used for detecting the reflection acceleration of the vibration wave signal reflected back by the well water as a propagation medium after the casing 1 is knocked. When the detection is carried out, the casing 1 is knocked by the knocking rod 23 to emit vibration waves into the shale layer, then the acceleration sensor 41 can detect the acceleration reflected by the vibration wave signal when the vibration waves are reflected back, then the inner wall of the casing 1 is knocked by knocking frequencies with different frequencies, so that the acceleration reflected by the vibration waves under each knocking frequency is respectively measured, and the corresponding relation between the acceleration and the knocking frequency is established, wherein when the vibration wave reflection acceleration is maximum, the knocking frequency is the natural frequency of the shale stratum, and therefore the knocking frequency of the frequency for knocking the inner wall of the casing 1 is determined.
In the present embodiment, the acceleration sensor 41 is a commercially available acceleration sensor 41, for example, an acceleration sensor having a model number of YMC221a25 is used.
A plurality of perforation holes are also arranged on the inner wall of the casing 1, and shale gas in the casing is mined out and collected through the perforation holes.
Example 2
An unconventional oil-gas pulse resonance synergistic method comprises the following steps:
s1, firstly, the motor 31 is used for driving the cam to rotate so that the knocking rod 23 knocks the casing 1, vibration waves are emitted into the shale layer in the knocking process, and then the acceleration sensor 41 is used for receiving the reflection acceleration of vibration wave signals;
s2, sequentially changing the rotating speed of the motor 31 to enable the knocking rod 23 to knock the inner wall of the casing 1 at different knocking frequencies, respectively receiving the vibration wave signal reflection acceleration under different knocking frequencies by using the acceleration sensor 41, and then determining which knocking frequency the reflection acceleration is maximum, so as to determine the natural frequency of the shale layer;
s3, determining the rotating speed of the motor 31 according to the knocking frequency when the reflection speed is maximum in the step S2, and enabling the motor 31 in each casing 1 to keep the rotating speed, so that the knocking rod 23 can knock the inner wall of the casing 1 at the knocking frequency to continuously send out vibration waves to the shale, and the shale is induced to resonate to induce a compact reservoir, so that the internal structure of the rock is damaged, the cracks and micro cracks of the shale reservoir of the single well are increased, and the permeability of the shale reservoir is increased;
s4, after the cooperation of the unconventional oil and gas pulse resonance synergistic device of 4-6 well drilling on a water well platform, the vibration of the wells can be mutually influenced or even superposed in a larger area to form formation area resonance and increase the resonance effect.
After the operation is carried out through the step, the compact reservoir is induced to resonate, the internal structure of the rock is damaged, the cracks and micro cracks of the shale in the layer can be increased, the permeability of the shale can be increased, the shale gas can be developed more easily, and the effect of increasing the yield is achieved.
The utility model discloses a sleeve pipe 1 and the knocking mechanism that set up in the well drilling, usable knocking rod 23 strikes sleeve pipe 1 when developing shale gas in order to send the shock wave in to the layer shale, through detecting out the natural frequency in the layer shale according to detecting element, make the natural frequency of knocking frequency and layer shale the same, the accessible brings out fine and close reservoir layer at the in-process that strikes and takes place resonance like this, destroy rock inner structure with this, increase the fracture and the micro-crack of layer shale, increase its permeability, make its rerum natura improve, so that exploit shale gas wherein.
Although the invention has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made based on the invention. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (7)
1. The utility model provides a device that unconventional oil gas pulse resonance synergized, unconventional oil gas pulse resonance synergized device sets up in the drilling, its characterized in that: the unconventional oil and gas pulse resonance synergistic device comprises a sleeve arranged in a drilling well, the outer wall of the sleeve is fixedly attached to the wall of the drilling well, each sleeve is internally provided with a knocking mechanism used for knocking the inner wall of the sleeve to send vibration waves into a shale stratum, and the frequency of the knocking mechanism for knocking the inner wall of the sleeve is the same as the natural frequency of a compact reservoir.
2. The unconventional oil and gas pulse resonance synergistic device according to claim 1, wherein: the striking mechanism includes:
the multi-direction cam is rotatably connected in the shell, a knocking rod is arranged at the position of each protruding part of the multi-direction cam, the knocking rods penetrate through the shell and abut against the inner wall of the sleeve, a return block is fixed at one end, close to the multi-direction cam, of each knocking rod, a spring is sleeved on each knocking rod, one end of each spring is fixed in a through hole, penetrating through the shell, and the other end of each spring abuts against the surface of the return block;
and the driving assembly is used for driving the multidirectional cam in each shell to rotate so as to drive the inner wall of the knocking sleeve.
3. The unconventional oil and gas pulse resonance synergistic device according to claim 2, wherein: the driving assembly includes a motor fixed to an upper end of the housing and a camshaft fixed to an output shaft of the motor, the camshaft penetrating through each housing and being fixed to each of the multidirectional cams, and bearings are fixed to positions of the camshaft penetrating through both ends of the upper end of each housing, outer rings of the bearings are fixed to the housing, and inner rings of the bearings are fixed to the camshaft.
4. The unconventional oil and gas pulse resonance synergistic device according to claim 1, wherein: the casing is also internally provided with a detection unit for detecting the natural frequency of the shale layer, the detection unit is an acceleration sensor, and the acceleration sensor is used for detecting the reflection acceleration reflected by the vibration wave signal after the casing is knocked.
5. The unconventional oil and gas pulse resonance synergistic device according to claim 2, wherein: the upper end of the sleeve is also provided with a controller for controlling the motor to run, and the controller is connected with a motor circuit.
6. The unconventional oil and gas pulse resonance synergistic device according to claim 1, wherein: the casing pipe is fixedly connected with the inner wall of the well through well cementation cement.
7. The unconventional oil and gas pulse resonance synergistic device according to claim 2, wherein: the controller is connected with the motor through an armored cable circuit, and the motor is lowered through an armored cable and fixed to a preset position of the casing.
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| CN201922171949.9U CN211370373U (en) | 2019-12-06 | 2019-12-06 | Unconventional oil gas pulse resonance synergistic device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111042787A (en) * | 2019-12-06 | 2020-04-21 | 龚大建 | Unconventional oil-gas pulse resonance synergistic method and device |
| CN113649404A (en) * | 2021-08-12 | 2021-11-16 | 曹立勇 | Thermal desorption device is restoreed to normal position soil |
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2019
- 2019-12-06 CN CN201922171949.9U patent/CN211370373U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111042787A (en) * | 2019-12-06 | 2020-04-21 | 龚大建 | Unconventional oil-gas pulse resonance synergistic method and device |
| CN113649404A (en) * | 2021-08-12 | 2021-11-16 | 曹立勇 | Thermal desorption device is restoreed to normal position soil |
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Effective date of registration: 20230831 Address after: 200941, 5th Floor, Building 12, No. 3938 Wenchuan Road, Baoshan District, Shanghai Patentee after: Shanghai Ruida Fengzhi Energy Technology Co.,Ltd. Address before: Building 29, Shengyun Jiayuan, Xisi Road, Dongying District, Dongying City, Shandong Province, 257000 Patentee before: Gong Dajian |