Seismic reflection investigations of basement in Tarim basin

作者：Yu Chang · 发表于：Chinese Journal of Geophysics · 年份：2012 · 被引用次数：6 · 研究领域：Geological and Geophysical Studies、Hydrocarbon exploration and reservoir analysis、Seismic Imaging and Inversion Techniques

Basement characteristics of a large cratonic sedimentary basin are closely related to the origin of sedimentary basins and to the formation of oil/gas fields.Information about the basements can be obtained from deep drilling within or from outcrop sampling around the basins,as well as can be obtained from reflection records that contain some tectonic information about early-deposited strata in the sedimentary basins.However,basement study requires reflection investigation with longer-time recording windows.In 2007,we extended the reflection recording window from 6 s to 12 s,obtained the first-hand seismic records for the study of basement structures in the Tarim basin.This 12 s reflection investigation contains 4 lines with total profile lengths of 1400 km.This paper presents these seismic profiles in detail after a short discussion of data acquisition and processing techniques,and then analyzes scattering patterns correlated to different parts within the basement.The investigation increases the 3% cost for longer data records,while has provided much more useful first-hand data for understanding of early development of the cratonic sedimentary basin and heterogeneity of the upper crust.