THE APPLICATION OF THE TRANSVERSE WAVE WELL LOGGING TECHNIQUE TO OCEAN ENGINEERING
BAI Da-peng1,2, ZHAO Tie-hu2, GU Xue-qing3, SONG Bao-shun3
1. Key Laboratory of Marine Hydrocarbon Resources and Environmental Geology, Ministry of Land and Resources, Qingdao 266071,China;
2. Qingdao Institute of Marine Geology, Qingdao 266071,China;
3. Jidong Oilfield Institute for Exploration and Research, Tangshan 063004, China
The traditional way of single bore wave testing is to make excitation on the ground and receive the signal in the bore, which causes the limitation of the test depth and reduce the test accuracy. In offshore drilling it can not achieve the recitation at all. Therefore, a new technique is required to obtain the shear wave for wave testing in offshore drilling. The hang wave logging method described in this paper puts both source and detectors into the borehole, thus getting rid of heavy ground source and realizing the convenience of the wave logging equipments. It is a one-double device. In this method, two detectors are used with the interval of 1 m to receive S-wave propagation signal and then determine the formation wave velocity of the borehole through using the S-wave arrival time difference by the sensor. The method played an important role in the platform survey of the Nanpu oilfield. The authors carried out shear wave logging for a borehole 120 m in depth and obtained a good testing result. The results provided accurate shear wave velocity for the project and played an important role in dividing the field soil types.
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BAI Da-peng, ZHAO Tie-hu, GU Xue-qing, SONG Bao-shun. THE APPLICATION OF THE TRANSVERSE WAVE WELL LOGGING TECHNIQUE TO OCEAN ENGINEERING. Geophysical and Geochemical Exploration, 2011, 35(3): 409-413.
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