Nov 8th-Data Proc. & Acquisn. SIG: Estimating sub-water bottom properties using marine guided waves and sonar:* ...
Complete Title: Estimating sub-water bottom properties using marine guided waves and sonar: physical modeling, Haitian Lakes, and Atlantis Field, Gulf of Mexico
Sponsored by Schlumberger
Event Location:
Schlumberger
Q Auditorium
10001 Richmond Avenue
Houston TX 77042 USA
NOTE: You Must be Logged in to Register
Speaker: Dr. Jiannan Wang, post-doc fellow at Allied Geophysical Lab of University of Houston
This work focuses on estimating sub-water bottom properties (S-wave velocity, density, acoustic impedance, lithology, and structure) and their applications to three cases: physical modeling data, Atlantis field in the Gulf of Mexico, and Haitian Lakes:
First, three sets of ultrasonic physical modeling experiments are conducted to observe guided waves in the water column. We present a new method to extract the sub-bottom S-wave velocity and density using least-squares inversion as well as a dispersion-curve filter to attenuate the guided waves. Physical modeling tests show both the inversion method and the dispersion-curve filter work well.
Second, using high-resolution sonar data from Atlantis field in the Gulf of Mexico, we infer the sediment type with a two-step procedure: We perform the envelope inversion to build an acoustic impedance profile of the sub-bottom followed by using the empirical equation to infer the sediment type. The field data test shows the differences between the inferring result and the real core measurement are less than 15% for the impedance.
Third, we characterize a major fault zone using high-resolution sonar profiles in two Haitian Lakes: Lake Azuey and Lake Miragoâne. We found a previously unknown, active north-dipping thrust faults in southern Lake Azuey and Lake Miragoâne as the deepest lake in the Caribbean region.
Speaker Biography: Dr. Jiannan Wang, post-doc fellow at Allied Geophysical Lab of University of Houston
Jiannan Wang is post-doc fellow at Allied Geophysical Lab of University of Houston. Jiannan got his B.S. in Geophysics from China University of Geosciences (Beijing), M.S. in Geophysics from Chinese Academy of Sciences, and Ph.D. in Geophysics from University of Houston. In 2015, Jiannan has earned both the Best Poster Paper Award and the recognition of presenting one of the Best 31 Papers at the SEG 85th Annual Meeting in New Orleans, Louisiana.
Time Schedule:
4:30 PM – sign-in, social time
5:00 PM – start of presentation
6:00 PM - close of meeting
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