Estimation of Sedimentary Basin Depth Using the Hybrid Technique for Gravity Data
Main Article Content
Abstract
Abstract: In this paper we present the rapid method for determining the depth distribution of a sedimentary basin by combining the FFT-based and space domain techniques in gravity data interpretation. The method is tested on two 3D synthetic models which density contrast is constant and exponential variation with depth. Then, the method is applied to determine the depth distribution of Nam Con Son sedimentary basin in Vietnam. The obtained results coincide well with theoretical models and seismic data. The computation speed of the method is much faster than that of space domain technique.
Keywords:
The hybrid technique, FFT-based technique, space domain technique, Nam Con Son basin.
References
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[2] Oldenburg, The inversion and interpretation of gravity anomalies, Geophysics, 39 (1974) 526-536.
[3] David Gómez Ortiz, Bhrigu N.P. Agarwal, 3DINVER.M: A MATLAB program to invert the gravity anomaly over a 3D horizontal density interface by Parker–Oldenburg’s algorithm, Computers & Geosciences, 31 (2005) 513–520.
[4] Young Hong Shin, Kwang Sun Choi, HouzeXu, Three-dimensional forward and inverse models for gravity fields based on the Fast Fourier Transform, Computers & Geosciences, 32 (2006) 727–738.
[5] R. Nagendra, P.V.S. Prasad, V.L.S. Bhimasankaram, Forward and inverse computer modeling of gravity field resulting from a density interface using Parker-Oldenberg method, Computers & Geosciences, 22 (1996) 227-231.
[6] R. Nagendra, P.V.S. Prasad, V.L.S. Bhimasankaram, FORTRAN program based on Granser's algorithm for inverting a gravity field resulting from a density interface, Computers & Geosciences, 2 (1996) 219-225.
[7] Bott, M.H.P, The use of rapid digital computing methods for direct gravity interpretation of sedimentary basins, Geophysical Journal of the Royal Astronomical Society, 3(1960)63-67.
[8] Harald Granser, Three - dimensional interpretation of gravity data from sedimentary basins using an exponential density – depth function, Geophysical Prospecting, 35(1987)1030 – 1041.
[9] Bui Cong Que and Nguyen Hiep, Geophysical field characteristics of Vietnam continental shelf and its neighbor, Project final report No. 48-B.03.02, 48-B marine research program, Hanoi, 1990. (in Vietnamese)