Interpretation technique of seismic geomorphological slice and its application
YANG Zhanlong1,2
1. Northwest Branch, Research Institute of Petroleum Exploration & Development, PetroChina, Lanzhou, Gansu 730020, China; 2. Key Laboratory of Reservoir Description, China National Petroleum Corporation, Lanzhou, Gansu 730020, China
Abstract：Time slicing，horizon slicing，stratal slicing and horizon flattening are analytical methods commonly used for studying structure,deposition and paleo-geomorphology in seismic interpretation.In this paper,the concept of seismic geomorphological slice and its making method are proposed for the practical needs for studying fine sedimentary system.A seismic geomorphological slice refers to a seismic slice extracted on a point of seismic data that significantly reflects the paleo-geomorphology of a geological period.Usually,it is made by spatial tracking of a geological body and small time-window perspective.This type of slice has low isochronous requirements to constrained horizons,so it is widely applicable in seismic data interpretation.It is easy to understand for geologists based on the analogy of geomorphology and has a strong practicability.It provides reliable prediction based on the idea of using the present as a key to understand the past.In summary,this method is effective for seismic sedimentary analysis.Practical applications have proved the scientificity of the concept,the rationality of the slicing method and the validity of the results.
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