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Trial to active seismic while drilling; Jinko shingen wo mochiita SWD eno kokoromi

Abstract

This paper describes the development of a more stable SWD system with larger energy by adding an artificial seismic source near the bit. SWD is a technique by which the seismic wave generated while drilling of rocks by bit can be observed on the ground surface and the records equivalent to the reverse VSP can be obtained. For this system, a shell with a vibrator was fixed immediately on the bit as a sub-generator, and total energy of usual impact by the bit and vibration by the vibrator was used as a seismic source for SWD. For the seismic wave generation mechanism of this vibrator, the shell was resonated by the magnetostrictive element, and vibration was given to the bit and drilling pipe. When this seismic source is used, only single frequency is obtained for each vibration due to the utilization of resonance of shell. Therefore, the generation patterns should be made, by which wide band energy can be obtained after the interaction. Since the survey was conducted using this bottom hole seismic source at the drilling depth more than 3,000 m, it was necessary to enhance the vibration energy. 2 refs., 2 figs.
Authors:
Tsuru, T; Kozawa, T [1] 
  1. Japan National Oil Corp., Tokyo (Japan). Technology Research Center
Publication Date:
Oct 01, 1996
Product Type:
Conference
Report Number:
CONF-9610294-
Reference Number:
SCA: 150301; PA: NEDO-96:914755; EDB-97:072144; SN: 97001782500
Resource Relation:
Conference: 95. SEGJ conference, Butsuri tansa gakkai dai 95 kai (1996 nendo shuki) gakujutsu koenkai, Kyoto (Japan), 21-23 Oct 1996; Other Information: PBD: Oct 1996; Related Information: Is Part Of Proceedings of the 95th SEGJ Conference; PB: 344 p.; Butsuri tansa gakkai dai 95 kai (1996 nendo shuki) gakujutsu koenkai koen ronbunshu
Subject:
15 GEOTHERMAL ENERGY; SEISMIC SURVEYS; MWD SYSTEMS; SEISMIC SOURCES; MECHANICAL VIBRATIONS; DRILL PIPES; MAGNETOSTRICTION; SEISMIC WAVES; WELL DRILLING; DRILL BITS
OSTI ID:
472649
Research Organizations:
Society of Exploration Geophysicists of Japan, Tokyo (Japan)
Country of Origin:
Japan
Language:
Japanese
Other Identifying Numbers:
Other: ON: DE97743637; TRN: 96:914755
Availability:
Available from The Society of Exploration Geophysicists of Japan, 2-18, Nakamagome 2-chome, Ota-ku, Tokyo, Japan; OSTI as DE97743637
Submitting Site:
NEDO
Size:
pp. 129-130
Announcement Date:

Citation Formats

Tsuru, T, and Kozawa, T. Trial to active seismic while drilling; Jinko shingen wo mochiita SWD eno kokoromi. Japan: N. p., 1996. Web.
Tsuru, T, & Kozawa, T. Trial to active seismic while drilling; Jinko shingen wo mochiita SWD eno kokoromi. Japan.
Tsuru, T, and Kozawa, T. 1996. "Trial to active seismic while drilling; Jinko shingen wo mochiita SWD eno kokoromi." Japan.
@misc{etde_472649,
title = {Trial to active seismic while drilling; Jinko shingen wo mochiita SWD eno kokoromi}
author = {Tsuru, T, and Kozawa, T}
abstractNote = {This paper describes the development of a more stable SWD system with larger energy by adding an artificial seismic source near the bit. SWD is a technique by which the seismic wave generated while drilling of rocks by bit can be observed on the ground surface and the records equivalent to the reverse VSP can be obtained. For this system, a shell with a vibrator was fixed immediately on the bit as a sub-generator, and total energy of usual impact by the bit and vibration by the vibrator was used as a seismic source for SWD. For the seismic wave generation mechanism of this vibrator, the shell was resonated by the magnetostrictive element, and vibration was given to the bit and drilling pipe. When this seismic source is used, only single frequency is obtained for each vibration due to the utilization of resonance of shell. Therefore, the generation patterns should be made, by which wide band energy can be obtained after the interaction. Since the survey was conducted using this bottom hole seismic source at the drilling depth more than 3,000 m, it was necessary to enhance the vibration energy. 2 refs., 2 figs.}
place = {Japan}
year = {1996}
month = {Oct}
}