High-density 3D seismic and its effectiveness in Qintong Sag,Subei Basin
High-precision 3D seismic is no longer sufficient to meet the current exploration and development needs for complex and concealed small-scale oil reservoir in the Qintong Sag.In 2022,high-density 3D seismic data acquisition was deployed in west Shuaiduo area of Qintong Sag.This 3D seismic used small-bin-size,wide-azimuth,high coverage frequency,high detection point density,and moderate shot point density,based on fine superficial investigations,advantage lithology stimulation and single point broadband receiving technology,high-definition aerial survey images,full node cable free reception,and background noise cable monitoring technology.The sampling density of reflection wave field of complex underground structures was improved,the low-frequency information acquisition was strengthened,and efficient and high-quality construction of high-density seismic were achieved.The resolution,frequency band width,signal-to-noise ratio,deep and interlayer inside reflection data quality of the imag-ing profile have been greatly improved,with the application of high fidelity surface wave suppression,enhanced resolution process-ing,and full-azimuth migration imaging technology.This 3D seismic exploration has positive reference significance for high-quality seismic exploration of Cenozoic faulted basin with complex surface,eastern China.
Qintong Saghigh-density 3D seismicdata acquisitionexcitation and receptionfull-azimuth and high fidelity processing
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