叠后反演和油气检测技术在福山凹陷岩性油气藏预测中的应用

Poststack seismic inversion and hydrocarbon detection in lithologic reservoir prediction in Fushan Sag

勘探程度的不断提高使岩性油气藏成为福山凹陷的主要勘探目标。GeoEast解释系统提供的叠后反演和油气检测技术为该区岩性油气藏的预测提供了有力的技术支撑。借助叠后反演技术,并结合地质、测井等资料进行综合分析,认为福山凹陷岩性油气藏的有利成藏模式为挠曲坡折带低位斜坡扇类型;通过对FS-Y区块开展油气检测,发现其地震频谱存在"低频共振、高频衰减"现象,为区内砂岩上倾尖灭岩性油气藏勘探提供了依据。

As the exploration maturity is getting higher and higher, lithologic reservoirs have become the important exploration targets in Fushan Sag. Poststack inversion and hydrocarbon detection provided by GeoEast interpretation sub-system offer a powerful technological support for lithologic reservoir prediction in Fushan Sag. With poststack inversion, favorable accumulation patterns for lithologic reservoirs are figured out: slope fan reservoir of flexure-slope break low-system tract( LST). Depending on hydrocarbon detection, we find out seismic frequency spectrum in FS_ Y area with the characteristics of "low-frequency resonance and high-frequency attenuation", which provides reference for sand-updip pinch-out lithologic reservoir exploration.