SU672588A1 - Source of seismic signals in ground - Google Patents
Source of seismic signals in groundInfo
- Publication number
- SU672588A1 SU672588A1 SU772558116A SU2558116A SU672588A1 SU 672588 A1 SU672588 A1 SU 672588A1 SU 772558116 A SU772558116 A SU 772558116A SU 2558116 A SU2558116 A SU 2558116A SU 672588 A1 SU672588 A1 SU 672588A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- source
- ground
- seismic signals
- waves
- transverse
- Prior art date
Links
Landscapes
- Geophysics And Detection Of Objects (AREA)
Description
. 1 , Изобретение относитс к механическим источникам возбуждени сейсмических колебаний и может быть использовано дл возбуждени поперечных гармонических упругих колебаний ПЕри изучении строени земной коры сейсмическими методами. Известно устройство дл возбужде ни поперечных сейсмических волн пр помощи возвратно-поступательного йв жени плиты, жестко скрепленной с грунтом При таком возбуждении поперечных волн в среде образуютс Sy и SH- волны, что существенно осложн ет волновую картину и требует специальной методики наблюдений и обработки дл разделени волновых полей. Известно также устройство 2 дл возбуждени поперечных волн типа SH, использующее реактивные двигате ли с реверсом, установленные в горизонтальной плоскости симметрично один относительно другого и центра плиты, котора жестко св зана с зем лей. Диапазон частот возбуждаемых этим устройством колебаний ограничен, по кольку получению высокочастотных колебаний преп тствует инертность системы и сложность регулировани реактивной т ги. Устройства на реактивной т ге сложны и небезопасны в обращений. Их йспбльзовайиё йри полевых наблюдени х ограничено из-за громоздкости устройства/ его невозможно использовать дл излучени из скважины. Наиболее близким по технической сущности к предложенному вл етс источник сейсмических сигналов в грунте, состо щий из корпуса, инертной массы в виде вращающегос маховика и привода З. Однако источником 3 одновременно возбуждаютс поперечные волны типов SV и SH. и не может возбуждатьс один, заданный тип поперечных волн. В силу конструктивных особенностей источник 3 позвол ет возбуждать лишь одиночные импульсные посылки сигналов. Целью изобретени вл етс ловьаиение отношени сигнал/помеха при возбуждении поперечных гармонических колебаний типа SH., Поставленна цель достигаетс тем, что в предложенном источнике колебаний маховик выполнен свободно вращаюшимс на вертикальной оси и с не. 1, The invention relates to mechanical sources of seismic oscillation and can be used to excite transverse harmonic elastic oscillations. PEI studies the structure of the earth's crust by seismic methods. A device is known for initiating transverse seismic waves using a reciprocating plate rigidly attached to the ground. With such excitation of transverse waves in the medium, Sy and SH waves are formed, which significantly complicates the wave pattern and requires a special technique of observation and processing wave fields. It is also known a device 2 for the excitation of transverse waves of the type SH, using jet engines with a reverse, mounted in a horizontal plane symmetrically one with respect to the other and the center of the slab, which is rigidly connected to the ground. The frequency range of the oscillations excited by this device is limited, since the reception of high frequency oscillations is prevented by the inertia of the system and the difficulty of controlling the reactive draft. Devices on reactive are difficult and unsafe to handle. Their field observations are limited due to the cumbersome nature of the device / it cannot be used to emit from a well. The closest in technical essence to the proposed is a source of seismic signals in the ground, consisting of a body, an inert mass in the form of a rotating flywheel and a drive Z. However, shear waves of types SV and SH are simultaneously excited by source 3. and one, given type of transverse waves cannot be excited. By virtue of the design features, source 3 allows only single pulsed signals to be excited. The aim of the invention is to capture the signal / interference ratio when exciting transverse harmonic oscillations of the type SH. The goal is achieved by the fact that in the proposed oscillation source the flywheel is made to rotate freely on the vertical axis and not
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU772558116A SU672588A1 (en) | 1977-12-23 | 1977-12-23 | Source of seismic signals in ground |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU772558116A SU672588A1 (en) | 1977-12-23 | 1977-12-23 | Source of seismic signals in ground |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU672588A1 true SU672588A1 (en) | 1979-07-05 |
Family
ID=20739359
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU772558116A SU672588A1 (en) | 1977-12-23 | 1977-12-23 | Source of seismic signals in ground |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU672588A1 (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4302825A (en) * | 1978-11-01 | 1981-11-24 | Union Oil Company Of California | Rotating eccentric weight apparatus and method for generating coded shear wave signals |
| WO1987005707A1 (en) * | 1986-03-18 | 1987-09-24 | Chevron Research Company | Downhole electromagnetic seismic source |
| WO1987005708A1 (en) * | 1986-03-18 | 1987-09-24 | Chevron Research Company | Nondestructive downhole seismic vibrator source and processes of utilizing the vibrator to obtain information about geologic formations |
| US4715470A (en) * | 1986-03-18 | 1987-12-29 | Chevron Research Company | Downhole electromagnetic seismic source |
| US4853906A (en) * | 1986-08-18 | 1989-08-01 | Conoco Inc. | Apparatus for generating elliptically polarized shear waves |
| US4867096A (en) * | 1986-12-12 | 1989-09-19 | Conoco Inc. | Tubular shear wave source |
| US4871045A (en) * | 1987-02-02 | 1989-10-03 | Conoco Inc. | Telescoping tube omni-directional shear wave vibrator |
| US4874061A (en) * | 1988-01-19 | 1989-10-17 | Conoco Inc. | Downhole orbital seismic source |
| US4982811A (en) * | 1989-08-08 | 1991-01-08 | The United States Of America As Represented By The United States Department Of Energy | Fluid driven torsional dipole seismic source |
| US5131488A (en) * | 1987-04-20 | 1992-07-21 | The United States Of America As Represented By The United States Department Of Energy | Seismic sources |
| US5166909A (en) * | 1986-08-18 | 1992-11-24 | Conoco Inc. | Method of seismic exploration using elliptically polarized shear waves |
-
1977
- 1977-12-23 SU SU772558116A patent/SU672588A1/en active
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4302825A (en) * | 1978-11-01 | 1981-11-24 | Union Oil Company Of California | Rotating eccentric weight apparatus and method for generating coded shear wave signals |
| WO1987005707A1 (en) * | 1986-03-18 | 1987-09-24 | Chevron Research Company | Downhole electromagnetic seismic source |
| WO1987005708A1 (en) * | 1986-03-18 | 1987-09-24 | Chevron Research Company | Nondestructive downhole seismic vibrator source and processes of utilizing the vibrator to obtain information about geologic formations |
| US4702343A (en) * | 1986-03-18 | 1987-10-27 | Chevron Research Company | Nondestructive downhole seismic vibrator source and processes of utilizing the vibrator to obtain information about geologic formations |
| US4715470A (en) * | 1986-03-18 | 1987-12-29 | Chevron Research Company | Downhole electromagnetic seismic source |
| US4783771A (en) * | 1986-03-18 | 1988-11-08 | Chevron Research Company | Nondestructive downhole seismic vibrator source and processes of utilizing the vibrator to obtain information about geologic formations |
| US4853906A (en) * | 1986-08-18 | 1989-08-01 | Conoco Inc. | Apparatus for generating elliptically polarized shear waves |
| US5166909A (en) * | 1986-08-18 | 1992-11-24 | Conoco Inc. | Method of seismic exploration using elliptically polarized shear waves |
| US4867096A (en) * | 1986-12-12 | 1989-09-19 | Conoco Inc. | Tubular shear wave source |
| US4871045A (en) * | 1987-02-02 | 1989-10-03 | Conoco Inc. | Telescoping tube omni-directional shear wave vibrator |
| US5131488A (en) * | 1987-04-20 | 1992-07-21 | The United States Of America As Represented By The United States Department Of Energy | Seismic sources |
| US4874061A (en) * | 1988-01-19 | 1989-10-17 | Conoco Inc. | Downhole orbital seismic source |
| US4982811A (en) * | 1989-08-08 | 1991-01-08 | The United States Of America As Represented By The United States Department Of Energy | Fluid driven torsional dipole seismic source |
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