西南石油大学学报(自然科学版)

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The Research of Near-surface Characters and Targeted Exploration
Technology in the Hinterland of Junggar Basin Desert Area

Shang Xinmin   

  1. Geophysical Reaearch Institute,Shengli Oilfield Company,SINOPEC,Dongying,Shandong 257022,China
  • Online:2015-02-01 Published:2015-02-01

Abstract:

Because of intensely fluctuating dunes and varies thickness in hinterland of Junggar desert area,short refraction
survey is mainly used in the 2D near surface exploration;however,this method causes inaccurate near-surface structure measurement,
leading to poor desert area seismic data quality and low trap reliability. In the new round of exploration launched
recently,we used the result of micro logging survey to study the geophysical parameters,such as desert region top,bottom
interface structure,thickness,velocity,depth-time relation,absorption and attenuation,etc. Research shows that sand dunes
in the hinterland of Junggar Basin desert area are fixed or semi-fixed,and are characteristic of stability and gentle bottom interface,
good consistency of depth-time relation,basically same buried depth velocity in different region and good correspondence
between velocity and quality factor. According to different thickness of sand dunes,we adopted single deep-well shooting with
roll-along designing excitation well depth and multiple and shallow well array shooting. High-quality seismic data has been
obtained by developing comprehensive dune map fitting statics correction and near surface absorption compensation technology.

Key words: deep well micro logging, near surface characteristics, dune curve, static correction, absorption compensation