Full waveform inversion based on well logging data constraint

Du Zeyuan1 Wu Guochen1,2 Wang Yumei3

(1.School of Geosciences, China University of Petroleum (East China), Qingdao, Shandong, China 266580)
(2.Laboratory for Marine Mineral Resources, National Laboratory for Marine Science and Technology, Qingdao, Shandong, China 266580)
(3.Research Institute of Geophysics, Shengli Oilfield Branch Co., SINOPEC, Dongying, Shandong, China 257022)

【Abstract】High-precision full waveform inversion depends on both low frequency seismic data and the initial model. However, low-frequency seismic information is usually not available, and an inaccurate initial model will lead to cycle skips. At the same time, inversions might cause multi-solutions and ill-posed problems. As well-logging data are characterized by high resolution and broadband information, we take it as a constraint for full waveform inversion. We correct initial velocity models with reliable low-frequency information extracted from logging data. Then, we extend objective functions by a prior model, where the prior model drives optimization steps as a constraint to minimize the objective functions. Numerical tests on both EAGE overthrust model and real data show that the proposed inversion improves results.

【Keywords】 full waveform inversion; low frequency information; logging-data constraint; initial model; objective function;

【DOI】

【Funds】 National Science and Technology Major Project of the Ministry of Science and Technology of China (2016zx05024-001-008)

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This Article

ISSN:1000-7210

CN:13-1095/TE

Vol 52, No. 06, Pages 1184-1192+1119

December 2017

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Article Outline

Abstract

  • 1 Introduction
  • 2 Theoretical method
  • 3 Modeling trials
  • 4 Application
  • 5 Conclusion and discussion
  • References