IMAGING 2D RUGGED TOPOGRAPHY SEISMIC DATA: A TOPOGRAPHY PSTM APPROACH INTEGRATED WITH RESIDUAL STATIC CORRECTION

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 中国科学院油气资源研究重点实验室

	IMAGING 2D RUGGED TOPOGRAPHY SEISMIC DATA: A TOPOGRAPHY PSTM APPROACH INTEGRATED WITH RESIDUAL STATIC CORRECTION
	Zhang, Hao; Xu, Jincheng; Liu, Qiancheng; Zhang, Jianfeng
刊名	JOURNAL OF SEISMIC EXPLORATION
	2016-08-01
卷号	25 期号:4 页码:339-358
关键词	land seismic imaging near surface velocity topography PSTM (TPSTM) residual static correction
文献子类	Article
英文摘要	Near surface topography is a main challenge in land seismic data processing. In conventional land data processing, seismic data are corrected to a reference datum before migration. We have developed a 2D topography pre-stack time migration (TPSTM) scheme that can handle surface topography with high near-surface velocities in land seismic imaging. The proposed TPSTM can be applied to 2D seismic data recorded on irregular surface without conventional static corrections. We describe the wave propagation through inhomogeneous media by defining two effective velocity parameters with the introduction of a floating datum. As a consequence, wave propagation phenomena in the complex near surface, such as near vertical incidences through a weathering layer and ray paths bending away from vertical in the presence of high near surface velocities, are correctly considered. The two effective velocity parameters can be estimated by velocity analysis and velocity scan so as to flatten events in the imaging gathers. The TPSTM to some extent correctly solves field static correction without applying conventional static correction based on the vertical incidence hypothesis. Applying TPSTM iteratively can also help to update the two velocities defined here and understand the variation of near surface macro velocity. In addition, we integrate residual static corrections into TPSTM to further address the residual static issue. The coherency along the events has been improved for stacking. Two-dimensional field datasets are used to demonstrate the proposed 2D TPSTM and workflow. High-quality imaging results are obtained.
WOS关键词	PRESTACK MIGRATION ; VELOCITY ANALYSIS ; LIMITS ; STACK
WOS研究方向	Geochemistry & Geophysics
语种	英语
WOS记录号	WOS:000383816100003
资助机构	National Science Fund of China(41174112) ; National Science Fund of China(41174112) ; National Science Fund of China Key Project(41330316) ; National Science Fund of China Key Project(41330316) ; National Science Fund of China(41174112) ; National Science Fund of China(41174112) ; National Science Fund of China Key Project(41330316) ; National Science Fund of China Key Project(41330316)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/53347]
专题	地质与地球物理研究所_中国科学院油气资源研究重点实验室
作者单位	Chinese Acad Sci, Key Lab Petr Resources Res, Inst Geol & Geophys, POB 9825, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Hao,Xu, Jincheng,Liu, Qiancheng,et al. IMAGING 2D RUGGED TOPOGRAPHY SEISMIC DATA: A TOPOGRAPHY PSTM APPROACH INTEGRATED WITH RESIDUAL STATIC CORRECTION[J]. JOURNAL OF SEISMIC EXPLORATION,2016,25(4):339-358.
APA	Zhang, Hao,Xu, Jincheng,Liu, Qiancheng,&Zhang, Jianfeng.(2016).IMAGING 2D RUGGED TOPOGRAPHY SEISMIC DATA: A TOPOGRAPHY PSTM APPROACH INTEGRATED WITH RESIDUAL STATIC CORRECTION.JOURNAL OF SEISMIC EXPLORATION,25(4),339-358.
MLA	Zhang, Hao,et al."IMAGING 2D RUGGED TOPOGRAPHY SEISMIC DATA: A TOPOGRAPHY PSTM APPROACH INTEGRATED WITH RESIDUAL STATIC CORRECTION".JOURNAL OF SEISMIC EXPLORATION 25.4(2016):339-358.