CN212079281U - Device for improving physical properties of compact shale oil and gas reservoir - Google Patents
Device for improving physical properties of compact shale oil and gas reservoir Download PDFInfo
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- CN212079281U CN212079281U CN201922261757.7U CN201922261757U CN212079281U CN 212079281 U CN212079281 U CN 212079281U CN 201922261757 U CN201922261757 U CN 201922261757U CN 212079281 U CN212079281 U CN 212079281U
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Abstract
The utility model discloses a device for improving physical properties of a compact shale oil and gas reservoir, which comprises an underground natural frequency detection system, an underground control system, a speed regulating motor, a vibration sensor, a vibrating rod and a vibrating rod body; the underground natural frequency detection system is used for detecting the natural frequency of the shale; the underground control system is connected with a speed regulating motor, the output end of the speed regulating motor is connected with a vibrating rod, and the outer side of the vibrating rod is wrapped with a vibrating rod body; the vibration sensor is arranged on the vibration rod body and used for detecting the vibration frequency of the vibration rod body; and the underground control system controls the rotating speed of the speed regulating motor according to the natural frequency of the shale detected by the underground natural frequency detection system, so that the vibrating rod body vibrates according to the natural frequency. The device is lowered to a preset perforation hole position in a well through an armored cable, a compact reservoir is induced to resonate by utilizing the resonance principle, new cracks and a large number of micro cracks are generated in the reservoir, the physical property of the reservoir is improved, and the recovery ratio of the shale gas of a single well is improved.
Description
Technical Field
The embodiment of the utility model provides an improve technical field, concretely relates to improve device of fine and close shale oil and gas reservoir rerum natura of shale oil and gas reservoir rerum natura.
Background
Shale gas refers to natural gas that exists and is enriched in an organic-rich shale and interlayer in an adsorbed state and a free state as main components. 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 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 depends on horizontal drilling and large-scale hydraulic fracturing to realize shale gas production, but the method is limited by the complexity of underground rock geology, a plurality of reconstruction effects are unsatisfactory, and the shale gas is attenuated very quickly.
SUMMERY OF THE UTILITY MODEL
Therefore, the embodiment of the utility model provides an improve device of fine and close shale oil and gas reservoir rerum natura to solve the problem of how to improve fine and close shale oil and gas reservoir rerum natura among the prior art.
In order to achieve the above object, the embodiment of the present invention provides the following technical solutions:
according to the embodiment of the utility model, in a first aspect, a device for improving the physical properties of a compact shale oil and gas reservoir is provided, which comprises an underground natural frequency detection system, an underground control system, a speed regulating motor, a vibration sensor, a vibrating rod and a vibrating rod body;
wherein the downhole natural frequency detection system is used for detecting the natural frequency of the shale;
the underground control system is connected with the speed regulating motor, the output end of the speed regulating motor is connected with the vibrating rod, and the vibrating rod body is wrapped outside the vibrating rod; the vibration sensor is arranged on the vibration rod body and used for detecting the vibration frequency of the vibration rod body; the underground control system controls the rotating speed of the speed regulating motor according to the natural frequency of the shale detected by the underground natural frequency detection system, so that the vibrating rod body vibrates according to the natural frequency.
Further, still include the eccentric wheel, the eccentric wheel set up in on the vibrating arm.
Further, the underground natural frequency detection system also comprises an armored cable and a surface control system, wherein the surface control system is connected with the underground natural frequency detection system through the armored cable.
Furthermore, the vibration rod further comprises a fixed baffle, and one end, close to the speed regulating motor, of the vibration rod is fixed inside the vibration rod body through the fixed baffle.
Furthermore, the center of the fixed baffle is provided with a mounting hole, and the vibrating rod penetrates out of the mounting hole.
Further, the vibration sensor is placed between the fixed baffle and the speed regulating motor.
According to the utility model discloses in the second aspect, a control method for improving fine and close shale oil and gas reservoir rerum natura is provided, include:
obtaining the natural frequency of shale at a specified position;
and adjusting the rotating speed of the speed regulating motor according to the natural frequency to drive the vibrating rod body to vibrate for a first set time.
Further, still include: and detecting the actual vibration frequency of the vibration rod body, and adjusting the rotating speed of the speed regulating motor according to the magnitude relation between the actual vibration frequency and the natural frequency.
Further, the actual vibration frequency of the vibrating rod body is detected by a vibration sensor provided on the vibrating rod body.
Further, the natural frequency of the shale in the designated position is obtained by a downhole natural frequency detection system.
The embodiment of the utility model provides a have following advantage:
the embodiment of the utility model provides an in the device pass through the armoured cable and descend to predetermined perforation hole position in the well, usable resonance principle induces tight reservoir and takes place resonance, at the inside new crack of production of reservoir and a large amount of microcracks for the reservoir rerum natura can be improved, and then improves the recovery ratio of single well shale gas.
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 a schematic diagram illustrating an apparatus for improving physical properties of a tight shale hydrocarbon reservoir in accordance with an exemplary embodiment;
in the figure: 1. a downhole natural frequency detection system; 2. a downhole control system; 3. a speed-regulating motor; 4. a vibration sensor; 5. a vibrating rod; 6. fixing a baffle plate; 7. perforating holes; 8. an eccentric wheel; 9. vibrating the rod body; 10. an armored cable; 11. a ground control system.
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.
According to the embodiment of the utility model, in a first aspect, a device for improving the physical properties of a compact shale oil and gas reservoir is provided, as shown in fig. 1, comprising a downhole natural frequency detection system 1, a downhole control system 2, a speed regulating motor 3, a vibration sensor 4, a vibrating rod 5 and a vibrating rod body 9;
wherein, the downhole natural frequency detection system 1 is used for detecting the natural frequency of shale;
the underground control system 2 is connected with the speed regulating motor 3, the output end of the speed regulating motor 3 is connected with the vibrating rod 5, and the vibrating rod body 9 is wrapped outside the vibrating rod 5; the vibration sensor 4 is arranged on the vibration rod body 9 and used for detecting the vibration frequency of the vibration rod body 9; the underground control system 2 controls the rotating speed of the speed regulating motor 3 according to the natural frequency of the shale detected by the underground natural frequency detection system 1, so that the vibrating rod 9 vibrates according to the natural frequency. The downhole control system 2 may be implemented using a downhole controller, such as a Siemens PLC model S7-200.
The device for improving the physical property of the compact shale oil and gas reservoir can induce the compact reservoir to generate resonance by using a resonance principle, and generate new cracks and a large amount of microcracks in the reservoir, so that the physical property of the reservoir is improved, and the recovery ratio of single-well shale gas is further improved.
In some optional embodiments, the vibrating rod further comprises an eccentric wheel 8, and the eccentric wheel 8 is arranged on the vibrating rod 5.
Through setting up eccentric wheel 8, accessible buncher 3 makes vibrating spear 5 produce the vibration to drive vibration barred body 9 and produce the vibration.
In some optional embodiments, the downhole natural frequency detection system further comprises an armored cable 10 and a surface control system 11, wherein the surface control system 11 is connected with the downhole natural frequency detection system 1 through the armored cable 10.
Through setting up armoured cable 10, the height of each part that can adjust to be located in the pit for the device is relative with perforation hole 7, thereby can be through perforation hole 7 with the energy transfer of vibration for the reservoir stratum of shale, make the inside fracture and the micro-crack of producing of tight reservoir stratum, make the reservoir stratum rerum natura improve, and then improve the recovery ratio of single well shale gas.
In some optional embodiments, the vibration rod further comprises a fixed baffle 6, and the fixed baffle 6 fixes one end of the vibration rod 5 close to the speed regulating motor 3 inside the vibration rod body 9.
Through setting up fixed stop 6, can fix vibrating spear 5, avoid vibrating spear 5 to appear droing.
In some alternative embodiments, the fixed baffle 6 has a mounting hole in the center, and the vibration rod 5 passes through the mounting hole.
Wherein, the shape and size of the mounting hole are the same as the shape and size of the cross section of the vibration rod 5, so that the fixing effect is better.
In some alternative embodiments, the vibration sensor 4 is placed between the fixed baffle 6 and the adjustable speed motor 3.
Wherein the vibration sensor 4 is used for detecting the actual vibration frequency of the vibration rod body 9 and transmitting the result to the downhole control system 2.
According to the utility model discloses in the second aspect, a control method for improving fine and close shale oil and gas reservoir rerum natura is provided, include:
obtaining the natural frequency of shale at a specified position;
according to natural frequency, the rotational speed of adjustment buncher 3 drives vibration barred body 9 and vibrates, lasts first settlement time, and wherein, first settlement time can be set up for one's sake or automatic setting, and first settlement time is longer, and its effect is more practical showing.
In some optional embodiments, further comprising: and detecting the actual vibration frequency of the vibration rod body 9, adjusting the rotating speed of the speed regulating motor 3 according to the magnitude relation between the actual vibration frequency and the natural frequency, increasing the rotating speed of the speed regulating motor 3 when the actual vibration frequency is less than the natural frequency, and reducing the rotating speed of the speed regulating motor 3 when the actual vibration frequency is more than the natural frequency.
In some alternative embodiments, the actual vibration frequency of the vibrating rod 9 is detected by the vibration sensor 4 disposed on the vibrating rod 9.
In some alternative embodiments, the natural frequency of the shale in the designated location is obtained by the downhole natural frequency detection system 1, wherein the natural frequency of the shale in the designated location is at the specific location downhole.
The downhole natural frequency detection system 1, the downhole control system 2 and the surface control system 11 can be selected from the prior art, and the principle and the specific structure thereof are not described again.
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 (6)
1. A device for improving physical properties of a compact shale oil and gas reservoir is characterized by comprising an underground natural frequency detection system, an underground control system, a speed regulating motor, a vibration sensor, a vibrating rod and a vibrating rod body;
wherein the downhole natural frequency detection system is used for detecting the natural frequency of the shale;
the underground control system is connected with the speed regulating motor, the output end of the speed regulating motor is connected with the vibrating rod, and the vibrating rod body is wrapped outside the vibrating rod; the vibration sensor is arranged on the vibration rod body and used for detecting the vibration frequency of the vibration rod body; the underground control system controls the rotating speed of the speed regulating motor according to the natural frequency of the shale detected by the underground natural frequency detection system, so that the vibrating rod body vibrates according to the natural frequency.
2. The device for improving the physical properties of the tight shale oil and gas reservoir as claimed in claim 1, further comprising an eccentric wheel, wherein the eccentric wheel is arranged on the vibrating rod.
3. The apparatus of claim 1, further comprising an armored cable and a surface control system, wherein the surface control system is connected to the downhole natural frequency detection system through the armored cable.
4. The device for improving the physical properties of the tight shale oil and gas reservoir as claimed in claim 1, further comprising a fixing baffle, wherein the fixing baffle fixes one end of the vibrating rod close to the speed regulating motor inside the vibrating rod body.
5. The device for improving the physical properties of the tight shale oil and gas reservoir as claimed in claim 4, wherein a mounting hole is formed in the center of the fixed baffle, and the vibrating rod penetrates out of the mounting hole.
6. The device for improving the physical properties of the tight shale oil and gas reservoir as claimed in claim 4, wherein the vibration sensor is placed between the fixed baffle and the adjustable speed motor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922261757.7U CN212079281U (en) | 2019-12-13 | 2019-12-13 | Device for improving physical properties of compact shale oil and gas reservoir |
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| CN201922261757.7U CN212079281U (en) | 2019-12-13 | 2019-12-13 | Device for improving physical properties of compact shale oil and gas reservoir |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111058820A (en) * | 2019-12-13 | 2020-04-24 | 龚大建 | Device for improving physical properties of compact shale oil and gas reservoir and control method thereof |
| CN112835104A (en) * | 2021-03-26 | 2021-05-25 | 中国石油大学(华东) | Unconventional reservoir natural frequency in-situ measurement system |
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2019
- 2019-12-13 CN CN201922261757.7U patent/CN212079281U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111058820A (en) * | 2019-12-13 | 2020-04-24 | 龚大建 | Device for improving physical properties of compact shale oil and gas reservoir and control method thereof |
| CN112835104A (en) * | 2021-03-26 | 2021-05-25 | 中国石油大学(华东) | Unconventional reservoir natural frequency in-situ measurement system |
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Effective date of registration: 20230815 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 |