Method for measuring near surface structure of water area

The invention discloses a measurement method for a near surface structure of a water area by utilizing an artificial method to produce seismic wave, which comprises the steps of: drilling and logging on a ship or a waterborne drilling platform; sinking detonators into a well through an excitation ca...

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Bibliographic Details
Main Authors ZHANG YUSHENG, FAN ZHIFANG, DENG ZHIWEN, ZHENG SHUQIANG, HU CHAOJUN
Format Patent
LanguageChinese
English
Published 25.05.2011
Subjects
DETECTING MASSES OR OBJECTS
GEOPHYSICS
GRAVITATIONAL MEASUREMENTS
MEASURING
PHYSICS
TESTING
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Summary:The invention discloses a measurement method for a near surface structure of a water area by utilizing an artificial method to produce seismic wave, which comprises the steps of: drilling and logging on a ship or a waterborne drilling platform; sinking detonators into a well through an excitation cable, detonating the detonators according to a sequence from deep positions to shallow positions, and receiving seismic data; selecting a receiving channel with a well detection distance within the range of between 2 and 6 meters to convert the first arrival time to vertical time; drawing the vertical time and corresponding depth into a time-depth coordinate system; allocating the positions of various layers according to the linear slopes corresponding to different velocity layers; using a leastsquare method to fit a line in each layer; taking reciprocals of the linear slopes as formation velocities; taking an intersection point of two lines as a formation interface; and obtaining the formation velocities and thickn
Bibliography:Application Number: CN20081115215