MAIN METHODS SYSTEM OF FINE PETROLEUM EXPLORATION——SEISMIC SEDIMENTOLOGY

Seismic sedimentology is a new methods system using depositional environment model based of high-precision seismic data,the modern depositional environment,outcrops and cores to identify the sedimentary unit 3D geometry,the internal structure and deposition process.Fine sedimentary modeling is the base of seismic sedimentology.Forward model technique is the bridge of seismic sedimentology.The main aim is using geophysical techniques to fine describe and explain underground geological body with the geological constrained model and forward model.The key technology used in the Dongying Sag of the Bohai Bay Basin and the Junggar Basin and includes:logging constrained inversion technology,stratal slicing and attribute analysis technology,frequency decomposing technology,etc.Seismic sedi-mentology will become the 21st century's main petroleum fine exploration methods.