90°相位转换技术在黄河口凹陷新近系储层预测中的应用

Application of 90°-phase conversion in the Neogene reservoir prediction of Huanghekou Sag

90°相位转换技术是通过地震相位旋转90°,使地震反射的主要同相轴与地质上的岩层对应,从而使地震相位具有岩性地层意义。该技术具有运算速度快、完全尊重原始地震资料,无需井资料和模型的约束等特点,尤其适合海上少井或无井条件下的储层研究。90°相位转换技术在渤海黄河口凹陷新近系油田的储层研究中取得了良好的应用效果,提高了储层的研究精度,尤其是薄层的可解释性。在相似地质背景条件下,该技术具有广泛的应用前景。

90°-phase conversion technique can make the main seismic event coincide with the geologically defined .sandstone bed through rotating seismic phase for ninety-degree, and the seismic phases have lithological stratigraphic significance. This technology has the advantages of fast calculation speed and fully respecting the raw seismic data, it is not constrained by well data and the model, it＇s especially suitable for offsbore reservoir research target which has no well or few wells. Ninety-degree phase conversion technique achieved a good application effects on reservoir prediction of Neogene oil fields in Huanghekou Sag. It improved reservoir prediction accuracy especially made the thin bed interpretation much easier. This technology can be promoted to oilfields with similar geological conditions.