Seismic Data Stacking Based on Time-varying Mapping

YUE Yubo1 ZHANG Jianlei1 ZHANG Chaoyang1 SHI Yunyan2 XIONG Yanrong3 SUN Pengfei4

(1.R&D Center BGP, CNPC, Zhuozhou, Hebei Province, China 072751)
(2.BGP Seismic Data Processing Center, Zhuozhou, Hebei Province, China 072751)
(3.BGP Acquisition Technology Center, Zhuozhou, Hebei Province, China 072751)
(4.School of Earth Science and Engineering, Hebei University of Engineering, Handan, Hebei Province, China 056038)

【Abstract】Due to the existence of large source-receiver elevation differences in ocean-bottom-node (OBN) and mountain data, conventional common-midpoint (CMP) stacking based on the assumption of horizontal land surface is no longer feasible. We propose common reflection point (CRP) stacking based on time-varying data mapping as an alternative. We use stacking velocity to calculate time-varying CRP sampling points in output sections. At each CRP sampling point, two-way time is calculated using a modified double-square-root formula for NMO correction. We can use this method to improve the stacking quality for OBN and mountain data, and we also can obtain accurate stacking velocity for subsequent processing. Model and field data tests show that CRP stacking based on time-varying data mapping is better than CMP stacking.

【Keywords】 common reflection point; time varying; data mapping; stacking;

【DOI】

【Funds】 National Science and Technology Major Project (2017ZX05018-001) Youth Program of National Natural Science Foundation of China (41604069) Youth Program of Hebei Education Department Foundation (QN2017310)

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This Article

ISSN:1000-7210

CN: 13-1095/TE

Vol 55, No. 02, Pages 331-340+230

April 2020

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Article Outline

Abstract

  • 0 Introduction
  • 1 Methodology
  • 2 Tests of model and real data
  • 3 Conclusion
  • References