关键词: 构造—岩性油气藏, 低幅度, 小断裂, 薄砂层, 识别技术

Abstract: In the south of Songliao Basin,large-area and low-abundance pool is the key area for increasing reserves and production.At present,it is facing the main problems of low abundance,small fault,thin sand layer,having complex and levity reservoir and relying mainly on composite structure-lithology reservoir.The pertinent techniques for controlling the problems of low,little and thin trap were adopted,including the technigues of very 3D-seismic interpretation and velocity-varying mapping accounted for low-amplitude traps,both of coherence and dip-layer checking for small fault,multi-parameter lithology inversion for thin sand layer under control of seismic facies. Finally,optimum well location is sought after appraised synthetically.It has gotten obvious results in verifying and finding out one batch of composite structure-lithology reservoir through drilling.It indicates that this technology is practical and effective and worth of popularizing.

Key words: structure-lithology reservoir, low-abundance, small fault, thin sand layer, recognition technique