CN203640715U - Adjustable-power transmitting device for transient electromagnetic logging - Google Patents
Adjustable-power transmitting device for transient electromagnetic logging Download PDFInfo
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- CN203640715U CN203640715U CN201320663678.9U CN201320663678U CN203640715U CN 203640715 U CN203640715 U CN 203640715U CN 201320663678 U CN201320663678 U CN 201320663678U CN 203640715 U CN203640715 U CN 203640715U
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- 230000001052 transient effect Effects 0.000 title claims abstract description 18
- 230000005669 field effect Effects 0.000 claims description 2
- 229910044991 metal oxide Inorganic materials 0.000 claims description 2
- 150000004706 metal oxides Chemical class 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 12
- 238000012360 testing method Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000011835 investigation Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Abstract
An adjustable-power transmitting device for transient electromagnetic logging comprises a high-frequency large-power transformer, a high-voltage direct current power supply and a low-voltage direct current power supply, wherein the primary side of the high-frequency large-power transformer is connected with a high-voltage direct current power supply through a switching logic circuit, and the secondary side of the high-frequency large-power transformer is connected with a low-voltage direct current power supply; the low-voltage direct current power supply is connected with a transmitting coil through a full-bridge transmitting circuit, and the switching logic circuit is connected with a single scrap microcomputer processor for providing a PWM (Pulse-Width Modulation) signal. According to the utility model, adjustable transmitting voltage in the electromagnetic transmitting process is achieved, and the transmitting power of the transmitting system is adjustable when complicated well conditions are encountered in a target layer in the logging process.
Description
Technical field
The utility model relates to the transient electromagnetic emitter in oil reservoir logging instrument corollary apparatus field, refers to especially a kind of adjustable emitter of power for transient electromagnetic well logging.
Background technology
Transient electromagnetic method has been successfully applied to ground system and has explored, and patent and ripe instrument are more, and in oil well logging field, transient electromagnetic method range of application is less.At present, the electromagnetic test instrument based on transient electromagnetic method is mainly that sleeve pipe quality is tested.
In cased well electromagnetic logging system, the importance of emission system is mathematical, and its performance quality directly affects the performance of this system.Different from surface em method emission system, it is applied to emission system in producing well and is easy to be subject to the impact of site work environment, also a lot of to the restriction of system.First, due to down-hole limited space, can only adopt small coil transmitting, it is too large that the size of instrument can not be done, and the miniaturization of doing can affect again investigation depth; Secondly, emission system must have very strong intelligent, flexibility, is convenient to the use in well; Again and, during well logging needs instrument to possess certain investigation depth, only have by increase transmitting power realize.At interval of interest, when well operating mode is bad, Electromagnetic Launching is used constant power transmission test poor effect, now, should strengthen transmitting power and test.For this reason, the transmitter module of designing high-power, adopts high-power adjustable lift-off technology for well logging operating mode.
Utility model content
The purpose of this utility model is the problem existing for prior art, a kind of adjustable emitter of power for transient electromagnetic well logging is provided, be transition emission process emitting voltage tunable arrangement, realize during well logging in the time that interval of interest hole condition is complicated, the transmitting power of emission system is adjustable.
Its technical scheme is: comprise high-frequency high-power transformer with and the high-voltage DC power supply that connects by switching logic circuit of former limit, secondary connect low-voltage dc power supply; Described low-voltage dc power supply connects transmitting coil by full-bridge radiating circuit, and described switching logic circuit connects the processor of single chip computer that PWM modulation signal is provided.
Such scheme can further be improved to:
Described full-bridge radiating circuit comprises four switch elements that are connected in parallel on transmitting coil two ends and are subject to processor of single chip computer control, and described switch element is metal-oxide half field effect transistor switch or insulated gate bipolar transistor switch.
In described switching logic circuit, be provided with the CMOS high-power switch tube by PWM modulation signal control conducting.
The secondary of described high-frequency high-power transformer is connected low-voltage dc power supply by rectifier, stabilizator with wave filter.
The voltage of described high-voltage DC power supply is greater than 140 volts, and the voltage of low-voltage dc power supply is greater than 3 volts.
Design principle of the present utility model is: transient emission system is that two pulses of a positive and a negative replace when transmitting, and doing is like this, for follow-up, collection signal is carried out to overlap-add procedure, eliminates the interference of ambient noise, improves signal to noise ratio.Under the certain condition of the resistance of transmitting coil, the size of transmitting power is embodied in the height of emitting voltage.Although coil is the DC pulse of positive and negative alternate, emission power is the DC voltage that numerical value is constant.At transition emission process, change emission power magnitude of voltage, also just change transmitting power.
The utility model solves the adjustable difficult point of Electromagnetic Launching process emitting voltage, realizes during well logging in the time that interval of interest runs into hole condition complexity, and the transmitting power of emission system is adjustable.
Brief description of the drawings
Fig. 1 is the theory diagram of a kind of embodiment of the utility model;
Fig. 2 is the rectangle transmitted pulse schematic diagram that loads on transmitting coil.
Detailed description of the invention
For clearly demonstrating the technical solution of the utility model, provide below preferred embodiment and be described with reference to the accompanying drawings.
Embodiment 1
For a basic comprising for the adjustable emitter of power of transient electromagnetic well logging, comprise high-frequency high-power transformer with and former the limit high-voltage DC power supply, the secondary that connect by switching logic circuit connect low-voltage dc power supply; Described low-voltage dc power supply connects transmitting coil by full-bridge radiating circuit, and described switching logic circuit connects the processor of single chip computer that PWM modulation signal is provided.
Optimize embodiment 2
Referring to Fig. 1, a kind of adjustable emitter of power for transient electromagnetic well logging, adopts single core armored cable, direct current supply, and ground supply voltage value generally, more than 140V, belongs to high direct voltage.In emitter inside, load on the voltage of transmitting coil more than 3V, between the two, need power conversion.
The adjustable emitter of power for transient electromagnetic well logging is converted to DC high-voltage power supply by the conversion regime of DC/DC the DC low-voltage needing, and transfer process adopts the method for PWM modulation.Switching logic circuit adopts CMOS high-power switch tube, and processor of single chip computer provides PWM modulation sequence, controls CMOS pipe alternate conduction, thereby obtain high-frequency ac voltage after power amplifier drives.Processor of single chip computer, according to the variation of test operating mode, provides different PWM modulation signals, and then controls the output voltage of high frequency transformer secondary winding.
High-frequency high-power transformer employing is recommended isolated, is alternately opened and is realized transferring energy by transformer group.The voltage of transformer primary side is higher, secondary low pressure, and secondary, after over commutation, voltage stabilizing and filtering, obtains low-voltage dc power supply, and this supply voltage value is subject to the control of PWM modulation signal, and size is adjustable.Low-tension supply provides and gives transmitting coil.
Emission control adopts full-bridge radiating circuit, and switch element is MOSFET or IGBT constant power switch, and powerful emission current can be provided.Switch element 1～4 is subject to processor of single chip computer control, provides forward and reverse transmitting to transmitting coil.
Load on the transmitted waveform of transmitting coil as shown in Figure 2.Different moment t in transmitting coil
i(i=1,2 ...), be loaded positive and negative square pulse, the amplitude V of pulse train
1adjustable.
Claims (5)
1. for the adjustable emitter of power of transient electromagnetic well logging, it is characterized in that: the former limit at high-frequency high-power transformer is connected with high-voltage DC power supply by switching logic circuit, and its secondary connects low-voltage dc power supply; Low-voltage dc power supply connects transmitting coil by full-bridge radiating circuit, and switching logic circuit is connected to processor of single chip computer by PWM modulation signal.
2. the adjustable emitter of power for transient electromagnetic well logging according to claim 1, it is characterized in that: described full-bridge radiating circuit comprises four switch elements that are connected in parallel on transmitting coil two ends and are subject to processor of single chip computer control, switch element adopts metal-oxide half field effect transistor switch or insulated gate bipolar transistor switch.
3. the adjustable emitter of power for transient electromagnetic well logging according to claim 1 and 2, is characterized in that: in described switching logic circuit, be provided with the CMOS high-power switch tube by PWM modulation signal control conducting.
4. according to the adjustable emitter of power for transient electromagnetic well logging of claim 3, it is characterized in that: the secondary of described high-frequency high-power transformer is connected low-voltage dc power supply by rectifier, stabilizator with wave filter.
5. the adjustable emitter of power for transient electromagnetic well logging according to claim 1 and 2, is characterized in that: the voltage of described high-voltage DC power supply is greater than 140 volts, and the voltage of low-voltage dc power supply is greater than 3 volts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320663678.9U CN203640715U (en) | 2013-10-26 | 2013-10-26 | Adjustable-power transmitting device for transient electromagnetic logging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320663678.9U CN203640715U (en) | 2013-10-26 | 2013-10-26 | Adjustable-power transmitting device for transient electromagnetic logging |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203640715U true CN203640715U (en) | 2014-06-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320663678.9U Expired - Lifetime CN203640715U (en) | 2013-10-26 | 2013-10-26 | Adjustable-power transmitting device for transient electromagnetic logging |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203640715U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103590810A (en) * | 2013-10-26 | 2014-02-19 | 中国石油化工集团公司 | Power-adjustable emitting device used for transient electromagnetic logging |
| CN111608625A (en) * | 2020-07-09 | 2020-09-01 | 清华四川能源互联网研究院 | Shock wave generating device and method for increasing production of oil and gas well |
-
2013
- 2013-10-26 CN CN201320663678.9U patent/CN203640715U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103590810A (en) * | 2013-10-26 | 2014-02-19 | 中国石油化工集团公司 | Power-adjustable emitting device used for transient electromagnetic logging |
| CN111608625A (en) * | 2020-07-09 | 2020-09-01 | 清华四川能源互联网研究院 | Shock wave generating device and method for increasing production of oil and gas well |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20151201 Address after: 100029 Beijing Chaoyang District Hui Xin a No. twelve layer 6 Patentee after: SINOPEC OILFIELD SERVICE Corp. Patentee after: WELL LOGGING COMPANY, SINOPEC SHENGLI PETROLEUM ENGINEERING Co.,Ltd. Address before: 100728 Beijing, Chaoyangmen, North Street, No. 22, No. Patentee before: CHINA PETROLEUM & CHEMICAL Corp. Patentee before: WELL LOGGING COMPANY, SINOPEC SHENGLI PETROLEUM ENGINEERING Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220301 Address after: 100029 Chaoyang District, Beijing Hui Xin Street six, Twelfth level. Patentee after: SINOPEC OILFIELD SERVICE Corp. Patentee after: Sinopec Jingwei Co.,Ltd. Patentee after: Shengli logging company of Sinopec Jingwei Co.,Ltd. Address before: 12 / F, No. 6, Huixin a, Chaoyang District, Beijing 100029 Patentee before: SINOPEC OILFIELD SERVICE Corp. Patentee before: WELL LOGGING COMPANY, SINOPEC SHENGLI PETROLEUM ENGINEERING Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140611 |