CN1409127A

CN1409127A - Underground three-component wave detector for small vertical earthquake section

Info

Publication number: CN1409127A
Application number: CN 02130918
Authority: CN
Inventors: 康大浩
Original assignee: Individual
Current assignee: Kang Qingyuan
Priority date: 2002-09-13
Filing date: 2002-09-13
Publication date: 2003-04-09
Anticipated expiration: 2022-09-13
Also published as: CN1188709C

Abstract

A downhole three-component rectifier incldues a main body in cylinder shape and rectifying elements set in the main body, among which there are a containing chamber to hold and airbag in the main body, a window on the main body wall to be interlinked to the containing chamber and the air hole of the airbag is connected with the air tube in the main body in order to let the expanded part of airbag protrude out of the said window after the airbag being inflated with air. The rectifier can be closely fitted on the well wall to be measured by inflating air into the airbag for more accuracy measurement.

Description

Underground three-component wave detector for small vertical earthquake section

Technical field

The present invention relates to a kind of seismoreceiver, particularly a kind of underground three-component wave detector for small vertical earthquake section.

Background technology

Vertical seismic profiling (VSP) (VSP) is a kind of underground survey method, specifically is meant any seismic surveying of descending traveling-wave field and upstream wave field in the record stratum.Because vertical seismic profiling (VSP) can record down traveling-wave field and upstream wave field, when exploration and exploitation oil reservoir, just can of great value mode be utilized the vertical seismic profiling (VSP) data with some uniqueness.For above-mentioned two kinds of wave fields are all noted, when the data of collection, no matter be seismoreceiver, or earthquake source all must vertically be arranged underground.Common way is: wave detector vertically (well) moves, and focus then is arranged near the ground or the face of land, as shown in Figure 1.

In order to observe vertical component, can observe the record of two horizontal components again, so that discern the due in of shearing wave better, generally all adopt three-component seismometer to detect seismic event.This three-component seismometer is to be fixed by the direction of mutually vertical (being X, Y, Z) by three independent wave detectors, and is sealed in the non-magnetic circular cylinder.

Because can the seismic monitoring device closely abut in the borehole wall and will directly influence the result of detection, therefore, generally with the shell of urgent device with three-component seismometer its borehole wall compressed at the measuring point place.The wave detector of vertical direction can accurately receive the SV ripple of horizontal transmission, vertical polarization, and two horizontal geophones can receive the SH ripple of the horizontal polarization of P ripple.

The well logging detector that adopts mainly contains three series at present.

1, the three-component well logging detector that has telescoping ram, as shown in Figure 2, comprise hydraulic line 21, telescoping ram 22, vertical vibrator 23, laterally detection device 24, horizontal vibrator 25, radially detection device 26, vertical geophone spare 27 and hydraulic pressure detection device 28 etc., this wave detector is pressed on it on borehole wall by telescoping ram, so that form good coupling with the borehole wall.

2, the SWC-2 of the SWC of U.S.'s earth resources (Geosurce) company (Side wall clamping geophone) series ^c, SW ^c-3C.

3, the Qiao Luoke of French AMG Co. (Geolock) series has single armed Qiao Luoke in this series, double-walled fluid pressure type Qiao Luoke (Geolock H) and bell machines Shi Qiaoluoke (Geolock M).The well logging detector of Qiao Luo device series is divided into single contact arm formula, three kinds of two contact arm fluid pressure types and two contact arm mechanical types.Well logging detector has the shell of a shielding, in adorn a plurality of detectors.After it was lowered to uncased hole or is lowered in the well of sleeve pipe, by the remote-controlled electro-motor in ground, the mechanical arm pawl that enables to uphold was kept a firm hand on the borehole wall, logs well in predetermined depth to reach safety and precise ground.The prime amplifier drive motor is housed in the well logging detector shell, is subjected to Ground Control.

As mentioned above, because existing well logging detector all needs to utilize mechanical mechanism that the wave detector borehole wall that reclines is detected geological data, thereby cause detector structure complicated, cost increases, and needs the energy of driving device mechanism, is not easy to use.

Summary of the invention

The purpose of this invention is to provide a kind of underground three-component wave detector for small vertical earthquake section simple in structure, easy to use.

Down-hole provided by the present invention three-component seismometer comprises: a cylinder body, with be arranged on intrinsic detection device, be provided with an accommodation chamber that holds air bag in the wherein said body, and on the barrel of body, have a window that communicates with accommodation chamber, air bag is directly inserted in the accommodation chamber, and the pore of air bag is connected with intrinsic snorkel, so that behind airbag aeration, the air bag that makes expansion is partly from the outside projection of described window.

In addition, the outer wrap multilayer shrink sleeve of air bag so that after air bags, makes the air bag fast contraction in accommodation chamber by the elastic force of shrink sleeve.

In addition, the shrink sleeve of air bag is made by abrasive rubber, can prevent that like this air bag from being punctured by the sharp shaped material on the borehole wall, to increase the serviceable life of air bag.

In addition, an end of body is provided with the suspension hook of a connecting rope, so that adjust the measuring position of wave detector easily by rope.

In addition, the area that contacts with the barrel inside surface when window area expands less than airbag aeration at least on the described body barrel can prevent that like this air bag breaks away from accommodation chamber when inflation.

Describe the present invention with instantiation below in conjunction with accompanying drawing.

Description of drawings

Fig. 1 is the synoptic diagram of existing vertical seismic profiling (VSP) underground survey;

Fig. 2 is existing pushing type three-component well logging detector synoptic diagram;

Fig. 3 is the synoptic diagram that shows detector structure of the present invention;

Fig. 4 is the synoptic diagram that shows the airbag structure of wave detector of the present invention;

Fig. 5 be wave detector of the present invention in well, move synoptic diagram;

Fig. 6 is the synoptic diagram of wave detector duty of the present invention.

Embodiment

Referring to Fig. 3, down-hole provided by the present invention three-component seismometer comprises: a cylinder body 1, with be arranged on intrinsic detection device 2, be provided with an accommodation chamber 3 that holds air bag 5 in the wherein said body 1, and on the barrel of body, have a window that communicates with accommodation chamber 4.Air bag 5 is directly inserted in the accommodation chamber 3, and the snorkel 6 in the pore of air bag 5 and the body 1 is connected, so that behind airbag aeration, the air bag that makes expansion is partly from described window 4 outside projections.In addition, be respectively equipped with top plug spare 7 at the two ends of cylinder body 1 and fill in part 8 down, in order to O-ring tubular body 1.Cylinder body 1 is divided into two parts, and a part is the part of placing air bag, and another part is the part of placing detection device 2, these two part seal isolation.In addition, an end of body 1 is provided with the suspension hook 9 of a connecting rope (not shown), so that adjust the measuring position of wave detector easily by rope.Detection device of the present invention 2 is same as the prior art, and is connected with body 1 seismic wave analysis equipment (not shown) outward by cable 10.

Snorkel 6 directly connects the air pump (not shown) outside the body 1, and this air pump can be any type of air pump, such as manual inflator.

Air bag 5 of the present invention directly is placed in the accommodation chamber 3, that is, be not fixed in the body 1 by any stationary installation, like this can simplified manufacturing technique, thus reduce cost, and the replacing of being convenient to air bag 5.For this reason, must increase the intensity of air bag.In order to increase the intensity of air bag, the present invention is in the outer wrap multilayer shrink sleeve 11 (referring to Fig. 4) of air bag, air bag so can be remained in the accommodation chamber in that inflation is former, and after air bags, make the air bag fast contraction in accommodation chamber by the convergent force of shrink sleeve.

Another effect of shrink sleeve 11 is to prevent that air bag from being punctured by the sharp shaped material on the borehole wall, and for this reason, the air bag shrink sleeve can be made by abrasive rubber.

In addition, the area that contacts with the barrel inside surface when window 4 areas are at least less than air bag 5 inflations on described body 1 barrel can prevent further that like this air bag breaks away from accommodation chamber when inflation.

Fig. 5 shows the situation when wave detector is actual to be used, the air bag unaerated of wave detector at this moment.Owing to the air bag unaerated, therefore can adjust the measuring position of wave detector easily by mobile rope.

Fig. 6 shows the another kind of situation when wave detector is actual to be used, and this moment, the air bag of wave detector was inflated.As can be seen from the figure, owing to air bag is inflated, thereby the wave detector body is closely contacted with the measuring position.

The present invention has following characteristics:

1, can be recorded to than common uphole shooting frequency, signal to noise ratio, vibration signal that resolution ratio is higher.

2, common micro logging can only obtain the above speed data in shaft bottom, can not get up back wave. And this This wave detector of invention then can obtain up back wave, thereby obtains the following data in shaft bottom.

3, this wave detector can be worked in open hole well and mud well.

4, but the pushing device of this novel wave detector adopts the multi-layer airbag of inflation/deflation, when observation by The operator controls inflator, and wave detector is pressed against on the borehole wall tightly, and it is fine to be coupled.

Claims

1, a kind of down-hole three-component seismometer comprises:

A cylinder body; With

Be arranged on intrinsic detection device;

Be provided with an accommodation chamber that holds air bag in the wherein said body, and on the barrel of body, have a window that communicates with accommodation chamber, air bag is directly inserted in the accommodation chamber, the pore of air bag is connected with intrinsic snorkel, after airbag aeration, the air bag of expansion is partly from the outside projection of described window.

2, wave detector according to claim 1, wherein the outer wrap multilayer shrink sleeve of air bag.

3, wave detector according to claim 1, wherein the shrink sleeve of air bag is made by the anti-rubber that wastes.

4, wave detector according to claim 1, wherein an end of body is provided with the suspension hook of a connecting rope.

5, wave detector according to claim 1, the area that contacts with the barrel inside surface when window area expands less than airbag aeration at least on the wherein said body barrel.