【摘要】 松辽盆地北部扶余油层的有效储层主要是河道砂体。由于河道砂体厚度薄(一般小于5 m),砂泥岩波阻抗差异小,加之砂、泥岩薄互层叠置,使得河道砂体地震响应弱,特征不明显,地震识别河道砂体是难题。以突出河道砂体地质特征为目标,开展了河道砂体识别地震处理技术研究,形成了以相对保持振幅与波形特征的补偿处理、叠前提高分辨率处理为核心技术,以处理解释一体化和处理过程监控为手段的相对保持振幅、相位和波形特征的高分辨率处理技术和流程。河道砂体识别地震保幅处理技术在肇源南地区应用见到明显效果,分辨率比常规处理提高15～20 Hz,保真能力得到大幅度提高。应用于肇源南地区,扶余油层河道和点砂坝得到清晰成像,以此部署钻井验证,符合率达100%。更多还原

【Abstract】 Channel sandbody was dominated reservoir in Fuyu oil layer hosted in Members 3-4, Quantou Formation in the northern Songliao Basin.The channel sandbodies were characterized by thin thiekness(generally less than 5 meters),little impedance differenee and sand-shale thinly interlayered overriding,which resulted in poor seismic response,and sandbody’s features being not clear.Using seismic data to accurately recognize channel sandstone became a diffi- cult technical problem.To aim at projecting sand geologic features,the paper developed a seis- mic processing technology for sand recognizing.A new high resolution proeessing and workflow characterized by relatively preserved amplitude and wave mainly by using integration between processing and interpretation and processing monitoring was put forward in the paper.The key technology mainly including compensation processing in order to maintain the features of ampli- tude and wave,prestacked raising resolution processing.The application of this technology in Zhaoyuan area achieved good result,with the resolution being improved by 15-20 Hz,and pre- served ability being boosted largely.By the technique,a clear image of sandbodies of river channel and point bar of Fuyu oil layer in southern part of Zhaoyuan area was drawn,and the coincidence rate of predicted channel sandbodies using this technique with drilling sandbodies achieved 100%.更多还原