Abstract：The BZ19-6 Archean metamorphic buried hill is divided into a weathered fracture zone, a relatively dense zone, an inner fracture zone and a dense zone in sequence from the top surface. The weathered fracture zone and the inner fracture zone enable reservoir development, and the fractured reservoir is characterized by low velocity and density. There are three types of seismic reflection structures inside the Archean metamorphic buried hill:① continuous, high and steep reflections from fault plane with a low frequency and a medium strength;② intermittent, high and steep network with a low frequency;③ local disorder with a medium-strength anomalous amplitude under the background of blank reflection. The complex geological and seismic characteristics of fractured reservoirs inside buried hills lead to multiple solutions and the uncertainty of reservoir prediction results. For this reason, the fractures inside the buried hill are divided into three scales (large, medium and small) according to logging data and seismic response characteristics. Forward modeling indicates that the high and steep reflection is a direct indicator of the development of large-scale fractures inside the buried hill, while the diffraction wave energy is an important feature indicating the development of medium-and small-scale fractures. The normalized fusion is performed on the data of high and steep reflection inside the buried hill which is enhanced by the curvelet transform and the diffraction wave data extracted with the principal component analysis. The comprehensive multi-wave field information effectively predicts the multi-scale fractured reservoir inside the buried hill.
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