CN204479761U - Tight sand hydrocarbon-bearing pool multi-wave AVO responding system - Google Patents
Tight sand hydrocarbon-bearing pool multi-wave AVO responding system Download PDFInfo
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- CN204479761U CN204479761U CN201520186275.9U CN201520186275U CN204479761U CN 204479761 U CN204479761 U CN 204479761U CN 201520186275 U CN201520186275 U CN 201520186275U CN 204479761 U CN204479761 U CN 204479761U
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Abstract
The utility model relates to tight sand hydrocarbon-bearing pool multi-wave AVO responding system, comprise the first amplifier, second amplifier, level adjuster and signal coupler, first amplifier accepts first signal also amplifies this first signal, to export the first amplifying signal, second amplifier accepts second input signal also amplifies this second input signal, to export the second amplifying signal, level adjuster is electrically connected with the second amplifier and signal coupler respectively, level adjuster adjusts the level of the second amplifying signal, the level of the second amplifying signal and the first amplifying signal is made to have fixing difference, signal coupler and the first amplifier are electrically connected, to be coupled described first, second amplifying signal also exports coupled signal.By arranging two amplifiers, the output terminal of one of them amplifier being arranged level adjuster, make the level of the second amplifying signal and the first amplifying signal have fixing difference, thus the coupled signal that signal coupler is produced meeting the demand of system.
Description
Technical field
The utility model relates to hydrocarbon exploration technology, particularly tight sand hydrocarbon-bearing pool multi-wave AVO responding system.
Background technology
China's conventional reservoir oil gas limited amount, as lithologic gas reservoirs, the exploration and development of compact sandstone gas has the meaning compensating conventional resource reserve and production rate decline.Tight sand hydrocarbon-bearing pool reservoir lithology physical property is special, and its complicacy and difficulties in exploration are all much larger than conventional sandstone.AVO (Amplitude Versus Offset, the change of amplitude offset distance) technology is used for Study of Seismic reflection amplitude and inquires into the change of reflection coefficient response with geophone offset (or incident angle) with the variation characteristic of the distance between shot point and receiver and geophone offset (or incident angle), and then determine reflecting interface covers, the rock signature transitivity parameter of the medium that underlies.In actual applications, can utilize earthquake reflected wave, analyze the change of the echo amplitude on reservoir interface with incident angle, estimation AVO property parameters, infers the oily character of reservoir.Multi-wave AVO, namely by analyzing the multiple ripple signal received, finds the position with hydrocarbon-bearing pool.
In prior art, usually use wave detector to detect two kinds of ripple signals, signal needs to carry out gain by the amplifying circuit of wave detector to signal usually.But due to the factor of amplifier, different gains is had to different signals, the signal level that causes amplifier to export produces difference, may cause the signal level exported when amplifier exceed processor receptible scope time, wave detector cannot normal acknowledge(ment) signal.Secondly, if arrange the different multi-signal of multiple amplifier process, and amplifier may cause unlike signal level difference value and systemic presupposition value to have error, and cannot meet system requirements, and system cannot respond.
Utility model content
The utility model is in order to solve the problem of prior art, and providing can the gain error of erase amplifier, the tight sand hydrocarbon-bearing pool multi-wave AVO responding system that signal can be accepted by system.
Concrete technical scheme is as follows: tight sand hydrocarbon-bearing pool multi-wave AVO responding system, comprise wave detector, signal processing circuit is provided with in described wave detector, signal processing circuit comprises amplifier, described amplifier comprises the first amplifier, second amplifier, level adjuster and signal coupler, described first amplifier accepts first signal also amplifies this first signal, to export the first amplifying signal, described second amplifier accepts second input signal also amplifies this second input signal, to export the second amplifying signal, described level adjuster is electrically connected with the second amplifier and signal coupler respectively, level adjuster adjusts the level of the second amplifying signal, the level of the second amplifying signal and the first amplifying signal is made to have fixing difference, signal coupler and the first amplifier are electrically connected, to be coupled described first, second amplifying signal also exports coupled signal.
It is below attached technical scheme of the present utility model.
Preferably, described level adjuster comprises three resistance, and wherein at least one is adjustable resistance or thermistor.
Preferably, described three resistance are the first resistance, the second resistance, the 3rd resistance respectively, wherein the second resistance is adjustable resistance, first resistance one end connects the second resistance, other end ground connection, and described 3rd resistance one end connects the second resistance, other end ground connection, described second resistance one end connects the second amplifier to receive the second amplifying signal, and the second resistance other end connection signal coupling mechanism, to export the second amplifying signal to signal coupler.
Preferably, described second resistance is thermistor.
Preferably, the gain of described second amplifier is greater than the gain of the first amplifier.
Technique effect of the present utility model: tight sand hydrocarbon-bearing pool multi-wave AVO responding system of the present utility model is by arranging two amplifiers, the output terminal of one of them amplifier is arranged level adjuster, make the level of the second amplifying signal and the first amplifying signal have fixing difference, thus the coupled signal that signal coupler is produced meet the demand of system.
Accompanying drawing explanation
Fig. 1 is the signal processing circuit schematic diagram of the tight sand hydrocarbon-bearing pool multi-wave AVO responding system of the utility model embodiment.
Fig. 2 is the schematic diagram of the level adjuster of the utility model embodiment.
Fig. 3 is the signal processing circuit schematic diagram of the tight sand hydrocarbon-bearing pool multi-wave AVO responding system of another embodiment of the utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described further.
As shown in Figure 1 to Figure 2, the tight sand hydrocarbon-bearing pool multi-wave AVO responding system of the present embodiment comprises wave detector (not shown), signal processing circuit is provided with in described wave detector, signal processing circuit comprises the first amplifier 31, second amplifier 32, level adjuster 33 and signal coupler 34.Described first amplifier 31 receives the first signal and amplifies this first signal, to export the first amplifying signal.Described second amplifier 32 receives the second input signal and amplifies this second input signal, to export the second amplifying signal.Described level adjuster 33 is electrically connected with the second amplifier and signal coupler 34 respectively, and level adjuster 33 adjusts the level of the second amplifying signal, makes the level of the second amplifying signal and the first amplifying signal have fixing difference.Described fixing difference can be the arbitrary value of zero or systemic presupposition.Signal coupler 34 and the first amplifier are electrically connected, to be coupled first, second amplifying signal described export coupled signal.By arranging two amplifiers, two groups of signals can be processed, the error that erase amplifier brings, signal can be received by the system.
Further, described level adjuster 33 comprises three resistance, and wherein at least one is adjustable resistance or thermistor.Described three resistance are the first resistance R1, the second resistance R2, the 3rd resistance R3 respectively, and wherein the second resistance R2 is adjustable resistance, and first resistance R2 one end connects the second resistance R2, other end ground connection.Described 3rd resistance R3 one end connects the second resistance R2, other end ground connection.Described second resistance R2 one end connects the second amplifier 32 to receive the second amplifying signal S1.Second resistance R2 other end connection signal coupling mechanism 33, with export through over level adjustment the second amplifying signal S2 to signal coupler 33.By three resistance composition level adjusters, better impedance operator coupling can be reached, increase damping capacity.When described second resistance R2 is thermistor, level adjuster 34 can adjust the level variation of the second amplifying signal automatically according to temperature variation.The gain of described second amplifier 32 is greater than the gain of the first amplifier 31.
As shown in Figure 3, the signal processing circuit of the present embodiment receives three road input signals, and be coupled into single signal output, it comprises the first amplifier 41, second amplifier 42 and the 3rd amplifier 43, described first amplifier 41 and the first level adjuster 45 are electrically connected, 3rd amplifier 43 and the second level adjustor 46 are electrically connected, and signal coupler 44 is electrically connected with the first level adjuster 45, second amplifier 42 and second electrical level adjuster 46 respectively.Thus have the first fixing difference between the level of the first amplifying signal that the first level adjuster 45 is exported and the level of the second amplifying signal.Have the second fixing difference between the level of the 3rd amplifying signal that second electrical level adjuster 46 exports and the level of the second amplifying signal, the level of the coupled signal making calmly signal coupler 44 export meets system requirements.First, second difference described can be zero or systemic presupposition value.
The tight sand hydrocarbon-bearing pool multi-wave AVO responding system of the present embodiment is by arranging two amplifiers, the output terminal of one of them amplifier is arranged level adjuster, make the level of the second amplifying signal and the first amplifying signal have fixing difference, thus the coupled signal that signal coupler is produced meet the demand of system.It is to be noted; above-mentioned preferred embodiment is only and technical conceive of the present utility model and feature is described; its object is to person skilled in the art can be understood content of the present utility model and implement according to this, protection domain of the present utility model can not be limited with this.All equivalences done according to the utility model Spirit Essence change or modify, and all should be encompassed within protection domain of the present utility model.
Claims (5)
1. tight sand hydrocarbon-bearing pool multi-wave AVO responding system, comprise wave detector, signal processing circuit is provided with in described wave detector, signal processing circuit comprises amplifier, it is characterized in that: described amplifier comprises the first amplifier, second amplifier, level adjuster and signal coupler, described first amplifier accepts first signal also amplifies this first signal, to export the first amplifying signal, described second amplifier accepts second input signal also amplifies this second input signal, to export the second amplifying signal, described level adjuster is electrically connected with the second amplifier and signal coupler respectively, level adjuster adjusts the level of the second amplifying signal, the level of the second amplifying signal and the first amplifying signal is made to have fixing difference, signal coupler and the first amplifier are electrically connected, to be coupled described first, second amplifying signal also exports coupled signal.
2. tight sand hydrocarbon-bearing pool multi-wave AVO responding system as claimed in claim 1, it is characterized in that: described level adjuster comprises three resistance, wherein at least one is adjustable resistance or thermistor.
3. tight sand hydrocarbon-bearing pool multi-wave AVO responding system as claimed in claim 2, it is characterized in that: described three resistance are the first resistance, the second resistance, the 3rd resistance respectively, wherein the second resistance is adjustable resistance, first resistance one end connects the second resistance, other end ground connection, described 3rd resistance one end connects the second resistance, other end ground connection, described second resistance one end connects the second amplifier to receive the second amplifying signal, second resistance other end connection signal coupling mechanism, to export the second amplifying signal to signal coupler.
4. tight sand hydrocarbon-bearing pool multi-wave AVO responding system as claimed in claim 3, is characterized in that: described second resistance is thermistor.
5. tight sand hydrocarbon-bearing pool multi-wave AVO responding system as claimed in claim 1, is characterized in that: the gain of described second amplifier is greater than the gain of the first amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520186275.9U CN204479761U (en) | 2015-03-27 | 2015-03-27 | Tight sand hydrocarbon-bearing pool multi-wave AVO responding system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520186275.9U CN204479761U (en) | 2015-03-27 | 2015-03-27 | Tight sand hydrocarbon-bearing pool multi-wave AVO responding system |
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| Publication Number | Publication Date |
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| CN204479761U true CN204479761U (en) | 2015-07-15 |
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| CN201520186275.9U Expired - Fee Related CN204479761U (en) | 2015-03-27 | 2015-03-27 | Tight sand hydrocarbon-bearing pool multi-wave AVO responding system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104749629A (en) * | 2015-03-27 | 2015-07-01 | 承德石油高等专科学校 | Tight sandstone oil and gas reservoir multiwave AVO response system |
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2015
- 2015-03-27 CN CN201520186275.9U patent/CN204479761U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104749629A (en) * | 2015-03-27 | 2015-07-01 | 承德石油高等专科学校 | Tight sandstone oil and gas reservoir multiwave AVO response system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150715 Termination date: 20160327 |
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| CF01 | Termination of patent right due to non-payment of annual fee |