Strike-slip fault system in the Erbatai area,Tarim Basin
In structural confirmation for oil and gas exploration,ascertaining the distributions of faults remains a challenge and priority in seismic data interpretation.The most complex fault combinations can be observed in strike-slip fault systems.This study investigated the Erbatai area that hosts a complex Luntai strike-slip fault system in the Tarim Basin.First,the background noise was reduced using the dip angle plus azimuth scanning and the structure-oriented filtering.Then,a multi-level nesting technology was developed by in-tegrating attributes like coherence cube,ant-tracking attribute,and maximum likelihood.Using the technology,this study identified and statistically analyzed 41 faults in the Erbatai area for their geometric development characteristics,including strike,dip,dip angle,and fault throw.Furthermore,this study determined the complex fault combinations within the strike-slip fault system.The findings in-dicate that the Erbatai area develops a dominant nearly EW-trending strike-slip fault zone and a NE-trending secondary fault zone.These faults are extensional fractures caused by left-lateral torsion,manifested as right-stepping en echelon normal faults.Overall,this study can be referenced for assessing structural hydrocarbon reservoirs in the Erbatai area.
strike-slip faultseismic interpretationstructure-oriented filteringTarim BasinErbatai area
万方数据
维普
