CN105464635A - Shale gas well production increase device with inherent frequency measuring unit - Google Patents
Shale gas well production increase device with inherent frequency measuring unit Download PDFInfo
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- CN105464635A CN105464635A CN201510864408.8A CN201510864408A CN105464635A CN 105464635 A CN105464635 A CN 105464635A CN 201510864408 A CN201510864408 A CN 201510864408A CN 105464635 A CN105464635 A CN 105464635A
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- power
- measuring unit
- acoustic wave
- frequency measuring
- intrinsic frequency
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/003—Vibrating earth formations
Abstract
The invention relates to a shale gas well production increase device with an inherent frequency measuring unit. The shale gas well production increase device mainly comprises a ground control unit, an underground device and an armored cable, and is characterized in that the underground device consists of an inherent frequency measuring unit and a high-power acoustic wave emission unit; the inherent frequency measuring unit is arranged below the high-power acoustic wave emission unit, and comprises an acoustic wave emission energy converter, an acoustic wave receiving energy converter, a sweep frequency acoustic emission module and a digital signal collection analysis module; the high-power acoustic wave emission unit comprises a high-power acoustic wave emission energy converter, a sound emission excitation module and a power conversion module; the inherent frequency measuring unit measures the inherent frequency of the underground clay shale stratum and transmits the inherent frequency to the high-power acoustic wave emission unit; the high-power acoustic wave emission unit emits high-power mechanical waves to a clay shale stratum at the inherent frequency, so that the shale stratum generates resonance. The shale gas well production increase device has the advantages that the inherent frequency of the clay shale stratum is directly measured under the ground; then, the high-power mechanical waves are emitted to the rock stratum at the frequency for realizing the resonance, so that the shale gas well achieves production and efficiency increase; and the practical production requirement is met.
Description
Technical field
The invention belongs to shale gas well mining Technology Underground field, be specifically related to a kind of shale gas well increasing device with intrinsic frequency measuring unit.
Background technology
China's shale gas aboundresources, recoverable reserves is at the forefront in the world, and along with the continuous enlargement of natural gas supply gap, the Chinese government more and more pays close attention to the exploration and development of shale gas.Shale gas well is collection, the Workplace of shale gas, at present, because domestic shale gas well exploration and development technology is still in the starting stage, has larger gap with World Developed Countries such as the U.S.; Meanwhile, there are larger difference in the structure of China's shale formation, composition and other country, and many technology and experience cannot directly be used for reference and introduce, and cause the well yield of domestic shale gas well generally on the low side, become the bottleneck restricting Chinese shale gas industry development.
Electric pulse, electric detonation is shaken, ultrasonic wave, hydraulic oscillation, all directly act on rammell, down-hole by physical medium etc. traditional Oil/gas Well individual well method for increasings such as in vitro pulses, thus the raising rate of oil and gas recovery, as patent " the ground extraction coal bed gas well remodeling method based on repetition rate shock wave " (application number: 201110027312.8), in the water in coal seam, the electric discharge of repetition rate high voltage pulse is carried out exactly by aqueous medium spark switch, in coal seam water, evoke high strong shock wave by electrohydraulic effect and act on coal seam, thus create new crack, coal seam, remove blocking, promote coal bed gas recovery ratio, but this kind of prior art coverage is usually shorter, the stratum of near wellbore zone can only be acted on, therefore recovery ratio promotes limited.
Research finds, affect shale gas enrichment and become the factor of Tibetan relevant with the parameters such as degree of porosity, permeability, young's modulus of elasticity, poisson's ratio of mud shale itself, especially, if high-power machinery ripple can be launched with intrinsic frequency to down-hole mud shale layer, make the micropore in rock stratum, microfissure quantity increases because of resonance, the permeability improving mud shale conciliates suction, to be promote shale gas recovery ratio, increase well yield the most directly, effective method, compared with conventional method, deep, mud shale rock stratum can be acted on, and not easily damage is caused to rock stratum.Patent " oil gas field method for increasing and device based on sound wave focusing resonance technique fractured rock " (application number: 201210142059.5) disclose a kind of oil gas field method for increasing based on sonic resonance technique and device, but in that patent, formation downhole natural frequency measurement, still needs to carry out drilling and coring delivery operation in advance, then simulation brake test is carried out in the lab, by simulated formation pressure, the conditions down-hole such as temperature and fluid saturation, pre-rupture process is carried out to rock core, measure the intrinsic frequency of sampled rocks, Measurement and analysis process is not only complicated, poor efficiency, and cost intensive, the needs of production of shale gas well can not be met.
Summary of the invention
For the deficiencies in the prior art, the present invention proposes a kind of shale gas well increasing device with intrinsic frequency measuring unit, the intrinsic frequency of mud shale layer directly can be measured in down-hole, then high-power machinery ripple is launched to form resonance with this frequency to rock stratum, thus the permeability effectively improving mud shale layer conciliates suction, solution prior art efficiency is low, cost is high, can not meet the problem of shale gas needs of production, realizes increasing production and improying productivity of shale Single Gas Well.
The technical solution used in the present invention is as follows:
A kind of shale gas well increasing device with intrinsic frequency measuring unit, mainly comprise terrestrial contr, downhole hardware and armored cable, terrestrial contr comprises power module, control module, Industrial Personal Computer (IPC), and terrestrial contr is implemented to control to downhole hardware at well head; Downhole hardware is placed in down-hole, vertical center, Signal transmissions and power supply is realized by armored cable between terrestrial contr and downhole hardware, it is characterized in that: described downhole hardware is made up of intrinsic frequency measuring unit and high-power acoustic wave emission unit, intrinsic frequency measuring unit is arranged on high-power acoustic wave emission unit bottom; Intrinsic frequency measuring unit comprises soic wave transmitting energy converter, acoustic receiver transducer, frequency sweep sound emission module, embedded digital signal processing and analysis module based on dsp chip or ARM technology; High-power acoustic wave emission unit comprises high-power soic wave transmitting energy converter, embedded sound emission stimulating module, power transfer module based on dsp chip or ARM technology; Described intrinsic frequency measuring unit is by the intrinsic frequency of mud shale layer under the preforation tunnel measuring well on the shale gas borehole wall and be transferred to high-power acoustic wave emission unit; Described high-power acoustic wave emission unit launches high-power machinery ripple with intrinsic frequency to mud shale layer by preforation tunnel, makes rock stratum produce resonance.
A kind of shale gas well increasing device with intrinsic frequency measuring unit as mentioned above, it is characterized in that: described soic wave transmitting energy converter and sound wave receiving transducer are in same sagittal plane and are symmetrical arranged, soic wave transmitting energy converter aims at preforation tunnel with certain inclination angle, launches sound wave to mud shale layer; Acoustic receiver transducer aims at same preforation tunnel with identical inclination angle, receives the reflective sound wave of mud shale layer.
A kind of shale gas well increasing device with intrinsic frequency measuring unit as mentioned above, it is characterized in that: described soic wave transmitting energy converter and sound wave receiving transducer are same acoustic wave transducer, both can launch sound wave, also can receive sound wave, on radial and axial, all aimed at preforation tunnel.
As mentioned above with a shale gas well increasing device for intrinsic frequency measuring unit, it is characterized in that: the frequency range of described frequency sweep sound emission module is 30 ~ 300Hz.
Beneficial effect of the present invention is: the intrinsic frequency directly measuring mud shale layer in down-hole, then high-power machinery ripple is launched to form resonance with this frequency to rock stratum, deep, mud shale rock stratum can be acted on, and not easy damaged rock stratum, the permeability effectively improving mud shale layer conciliates suction, shale gas well is increased production and improved productivity, meets the needs of production of shale gas.
Accompanying drawing explanation
Accompanying drawing of the present invention is described as follows:
Fig. 1 is structural representation of the present invention;
Fig. 2 is the operating diagram of intrinsic frequency measuring unit first embodiment;
Fig. 3 is the operating diagram of intrinsic frequency measuring unit second embodiment; .
1 terrestrial contr; 2 downhole hardwares; 21 high-power acoustic wave emission unit; 22 intrinsic frequency measuring units; 3 armored cables; 4 preforation tunnels; The 5 shale gas well boreholes wall; 6 mud shale layers; 7 soic wave transmitting energy converters; 8 acoustic receiver transducers; 9 can send out the acoustic wave transducer that can receive.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described:
A kind of shale gas well increasing device with intrinsic frequency measuring unit, mainly comprise terrestrial contr 1, downhole hardware 2 and armored cable 3, terrestrial contr 1 comprises power module, control module, Industrial Personal Computer (IPC), and terrestrial contr 1 is implemented to control to downhole hardware 2 at well head; Downhole hardware 2 is placed in down-hole, vertical center, water in well act as the couplant between downhole hardware 2 and down-hole mud shale layer 6, terrestrial contr 1 and downhole hardware 2 realize Signal transmissions and power supply by armored cable 3, it is characterized in that: described downhole hardware 2 is made up of intrinsic frequency measuring unit 22 and high-power acoustic wave emission unit 21, intrinsic frequency measuring unit 22 is arranged on high-power acoustic wave emission unit 21 bottom; Intrinsic frequency measuring unit 22 comprises soic wave transmitting energy converter 7, acoustic receiver transducer 8, frequency sweep sound emission module, embedded digital signal processing and analysis module based on dsp chip or ARM technology; High-power acoustic wave emission unit 21 comprises high-power soic wave transmitting energy converter, embedded sound emission stimulating module, power transfer module based on dsp chip or ARM technology; Described intrinsic frequency measuring unit 22 is by the intrinsic frequency of mud shale layer under preforation tunnel 4 measuring well on the shale gas borehole wall 5 and be transferred to high-power acoustic wave emission unit 21; Described high-power acoustic wave emission unit 21 launches high-power sound wave with intrinsic frequency to mud shale layer by preforation tunnel 4, makes rock stratum produce resonance.
During work, terrestrial contr 1 control well lower device 2 drops to target well section, intrinsic frequency measuring unit 22 is made to aim at preforation tunnel 4 on the shale gas well borehole wall 5, encourage soic wave transmitting energy converter 7 to launch frequency sweep mechanical wave to mud shale layer 6 by frequency sweep sound emission module, the frequency range of frequency sweep sound emission module is 30 ~ 300Hz; Frequency sweep mechanical wave is propagated to mud shale layer 6 through preforation tunnel 4, reflection echo is received by acoustic receiver transducer 8, and analyzed by the amplitude versus frequency characte of digital signal acquiring analysis module to reflection echo, according to resonance principle, the frequency values that in reflection echo, amplitude maximum place is corresponding is the intrinsic frequency of down-hole mud shale layer 6.
After recording intrinsic frequency, terrestrial contr 1 control well lower device 2 continues to decline, high-power acoustic wave emission unit 21 is made to aim at preforation tunnel 4, the alternating current that terrestrial contr 1 supplies is converted to direct current by power transfer module, sound emission stimulating module obtains intrinsic frequency measured value from the digital signal acquiring analysis module of intrinsic frequency measuring unit 22, and produce high-voltage pulse signal with this frequency values, high-power soic wave transmitting energy converter is encouraged to launch high-power machinery ripple, this mechanical wave is propagated to mud shale layer 6 through preforation tunnel 4, resonance is formed in rock stratum, thus increase microfissure, micropore, improve permeability.
Above-mentioned digital signal acquiring analysis module, sound emission stimulating module etc. are the embedded system based on dsp chip or ARM technology.
A kind of embodiment of described intrinsic frequency measuring unit 22 is as Fig. 2, soic wave transmitting energy converter 7 and sound wave receiving transducer 8 are in same sagittal plane and are symmetrical arranged, soic wave transmitting energy converter 7 aims at preforation tunnel 4 with certain inclination angle, launches frequency sweep mechanical wave to mud shale layer 6; Acoustic receiver transducer 8 aims at same preforation tunnel 4 with identical inclination angle, receives the reflection echo of mud shale layer 6.Usually, the inclination angle described in above-described embodiment is 10 ° ~ 45 °.
Another embodiment of described intrinsic frequency measuring unit 22 is as Fig. 3, and soic wave transmitting energy converter and sound wave receiving transducer adopt same acoustic wave transducer 9, and it both can launch sound wave, also can receive sound wave, on radial and axial, all aim at preforation tunnel 4.
As mentioned above with a shale gas well increasing device for intrinsic frequency measuring unit, it is characterized in that: the frequency range of described frequency sweep sound emission module is 30 ~ 300Hz.
Above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in previous embodiment, or carries out equivalent replacement to wherein some or all of technical characteristic; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of embodiment of the present invention technical scheme.
Claims (5)
1. the shale gas well increasing device with intrinsic frequency measuring unit, mainly comprise terrestrial contr (1), downhole hardware (2) and armored cable (3), terrestrial contr (1) comprises power module, control module, Industrial Personal Computer (IPC), implements to control to downhole hardware (2) at well head; Downhole hardware (2) is placed in down-hole, vertical center, Signal transmissions and power supply is realized by armored cable (3) between terrestrial contr (1) and downhole hardware (2), it is characterized in that: described downhole hardware (2) is made up of intrinsic frequency measuring unit (22) and high-power acoustic wave emission unit (21), and intrinsic frequency measuring unit (22) is arranged on high-power acoustic wave emission unit (21) bottom; Intrinsic frequency measuring unit (22) mainly comprises soic wave transmitting energy converter (7), acoustic receiver transducer (8), frequency sweep sound emission module, digital signal acquiring analysis module; High-power acoustic wave emission unit (21) mainly comprises high-power soic wave transmitting energy converter, sound emission stimulating module, power transfer module; Described intrinsic frequency measuring unit (22) is by the intrinsic frequency of mud shale layer (6) under preforation tunnel (4) measuring well on the shale gas borehole wall (5) and be transferred to high-power acoustic wave emission unit (21); Described high-power acoustic wave emission unit (21) launches high-power machinery ripple with intrinsic frequency to mud shale layer (6) by preforation tunnel (4).
2. a kind of shale gas well increasing device with intrinsic frequency measuring unit as claimed in claim 1, it is characterized in that: described soic wave transmitting energy converter (7) and sound wave receiving transducer (8) are in same sagittal plane and are symmetrical arranged, soic wave transmitting energy converter (7) aims at preforation tunnel (4) with certain inclination angle, launches frequency sweep sound wave to mud shale layer (6); Acoustic receiver transducer (8) aims at same preforation tunnel (4) with identical inclination angle, receives the reflection echo of mud shale layer (6).
3. a kind of shale gas well increasing device with intrinsic frequency measuring unit as claimed in claim 2, is characterized in that: the inclination angle scope of described soic wave transmitting energy converter (7) and sound wave receiving transducer (8) is 10 ° ~ 45 °.
4. a kind of shale gas well increasing device with intrinsic frequency measuring unit as claimed in claim 1, it is characterized in that: described soic wave transmitting energy converter and sound wave receiving transducer are samely send out the acoustic wave transducer (9) that can receive, preforation tunnel (4) is all aimed on radial and axial, both launch frequency sweep sound wave, also receive reflection echo.
5. a kind of shale gas well increasing device with intrinsic frequency measuring unit according to any one of claim 1,2,4, is characterized in that: the frequency range of described frequency sweep sound emission module is 30 ~ 300Hz.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106437661A (en) * | 2016-10-17 | 2017-02-22 | 铜仁中能天然气有限公司 | Method capable of directly improving permeability of oil gas reservoir |
| CN106568675A (en) * | 2016-10-17 | 2017-04-19 | 铜仁中能天然气有限公司 | Novel desorption pressure tester for shale gas |
| CN110185421A (en) * | 2019-05-24 | 2019-08-30 | 龚雨诗 | A kind of recovering device and method of shale gas |
| CN110965998A (en) * | 2019-12-13 | 2020-04-07 | 龚大建 | Detection device and detection method for shale natural frequency in shale gas well |
| CN111608654A (en) * | 2020-06-05 | 2020-09-01 | 中国石油大学(华东) | Shale reservoir natural frequency measuring method and device |
| CN111794727A (en) * | 2020-07-02 | 2020-10-20 | 中国石油大学(北京) | Pump injection frequency selection method and device for pulse circulation hydraulic fracturing |
| CN111812711A (en) * | 2020-07-20 | 2020-10-23 | 中国石油大学(北京) | Hydrate stratum seismic physical simulation test device and method based on reflection wave field |
| CN113009576A (en) * | 2021-03-26 | 2021-06-22 | 中国石油大学(华东) | Reservoir natural frequency in-situ non-contact detection method based on eigenmode filtering |
| CN110185421B (en) * | 2019-05-24 | 2024-04-26 | 上海瑞达峰致能源科技股份有限公司 | Shale gas harvesting device and method |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106437661A (en) * | 2016-10-17 | 2017-02-22 | 铜仁中能天然气有限公司 | Method capable of directly improving permeability of oil gas reservoir |
| CN106568675A (en) * | 2016-10-17 | 2017-04-19 | 铜仁中能天然气有限公司 | Novel desorption pressure tester for shale gas |
| CN110185421A (en) * | 2019-05-24 | 2019-08-30 | 龚雨诗 | A kind of recovering device and method of shale gas |
| CN110185421B (en) * | 2019-05-24 | 2024-04-26 | 上海瑞达峰致能源科技股份有限公司 | Shale gas harvesting device and method |
| CN110965998A (en) * | 2019-12-13 | 2020-04-07 | 龚大建 | Detection device and detection method for shale natural frequency in shale gas well |
| CN111608654A (en) * | 2020-06-05 | 2020-09-01 | 中国石油大学(华东) | Shale reservoir natural frequency measuring method and device |
| CN111794727A (en) * | 2020-07-02 | 2020-10-20 | 中国石油大学(北京) | Pump injection frequency selection method and device for pulse circulation hydraulic fracturing |
| CN111812711A (en) * | 2020-07-20 | 2020-10-23 | 中国石油大学(北京) | Hydrate stratum seismic physical simulation test device and method based on reflection wave field |
| US11092706B1 (en) | 2020-07-20 | 2021-08-17 | China University Of Petroleum (Beijing) | Physical seismic simulation test apparatus and method based on reflected wave field for hydrate formation |
| CN113009576A (en) * | 2021-03-26 | 2021-06-22 | 中国石油大学(华东) | Reservoir natural frequency in-situ non-contact detection method based on eigenmode filtering |
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Application publication date: 20160406 |