Oil & Gas Geology ›› 2006, Vol. 27 ›› Issue (2): 269-274.doi: 10.11743/ogg20060220

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Identification and description of complicated small fault-block traps in Subei basin

Mu Rong   

  1. Geophysical Technology Research Institute of Jiangsu Oilfield Company, SINOPEC, Nanjing, Jiangsu
  • Received:2005-08-12 Online:2006-04-25 Published:2012-01-16

Abstract:

Exploration of complicated small fault blocks has always been a hard nut to crack in the mature oil regions in eastern China. In view of the complicated surface and subsurface characteristics of the small fault blocks in Subei basin, the idea of integrated seismic processing and interpretation is adopted and full 3D data processing method is applied to improve the imaging quality of complicated fault blocks. Taking Gaoyou sag in Subei basin as an example, detailed interpretation of faults, study of structural patterns and mode-guided analysis of complex structures are performed in structural interpretation. Full 3D data interpretation methods, such as 3D spatial horizon calibration, coherence volume, 3D visualization and variable velocity mapping, are used in the identification and description of the complicated small fault-block traps to improve precision. The desired results have been achieved in practical application.

Key words: integrated processing and interpretation, 3D spatial horizon calibration, 3D visualization, variable velocity mapping, complicated small fault block, Subei basin

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