SEISMIC FACIES AND DISTRIBUTION PATTERN OF IGNEOUS ROCKS IN THE EASTERN DEPRESSION OF NORTH YELLOW SEA BASIN

Igneous rocks, as a kind of reservoir, play significant roles in the accumulation of hydrocarbons. Multistage igneous rocks occur widely in the Eastern Depression of the North Yellow Sea Basin. However, the distribution pattern of the igneous rocks remains unclear so far. In this paper, 3D seismic data is used to identify the types of igneous facies and distribution patterns according to their reflection characteristics. In order to trace the spatial distribution of the igneous rocks, both the technology of three dimensional seismic time slice and the technique of seismic attributes are adopted for this region. As the result, four seismic facies, i.e. the column-like, peak-like, mushroom-like and mound-like igneous bodies, are identified and three igneous complexes found in the eastern erosional area, the center of depression and the northwest part of the depression respectively.