Application of PSDM imaging technology based on floating datum of approximate true surface

DOU Qiang-Feng; LUO Yong; YANG Xiao-Hai; TAN Jia

doi:10.11720/wtyht.2022.2463

2022 Vol. 46, No. 2

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DOU Qiang-Feng, LUO Yong, YANG Xiao-Hai, TAN Jia. 2022. Application of PSDM imaging technology based on floating datum of approximate true surface. Geophysical and Geochemical Exploration, 46(2): 444-450. doi: 10.11720/wtyht.2022.2463

Citation:

DOU Qiang-Feng, LUO Yong, YANG Xiao-Hai, TAN Jia. 2022. Application of PSDM imaging technology based on floating datum of approximate true surface. Geophysical and Geochemical Exploration, 46(2): 444-450. doi: 10.11720/wtyht.2022.2463

Application of PSDM imaging technology based on floating datum of approximate true surface

Geophysical Research Center, Research Institute of Exploration and Development,Xinjiang Oilfield Company,PetroChina,Urumqi 830013,China

Received Date: 29 December 2020

Publish Date: 28 June 2022

Abstract

Abstract

The conventional CMP floating datum processing method based on horizontal surface assumption is not suitable for the imaging of the complex tectonic area in the Southern Junggar Thrust Belt.This paper selects the floating datum of approximate true surface as the processing datum in both the time domain and the depth domain.The pre-stack time-domain preprocessing includes selecting optimal the near-surface bottom boundary,the static correction for surface consistency of approximate true surface,surface-consistent DSR NMO velocity analysis,and residual static correction,in order to maintain the consistency of the process and parameters from the time-domain preprocessing to pre-stack depth migration (PSDM).The selection of the floating datum makes the wavefield travel time closer to the actual travel path and realizes higher imaging precision and accurate geological structure.
- complex structure /
- approximate true surface /
- DSR NMO /
- surface consistency /
- PSDM

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