On the basis of the present situation of oil and gas exploration and geological research of the west slope in the northern Songliao Basin, the factors controlling reservoir formation, oil and gas migration and accumulation, have been re-examined from the aspects of structure, deposition and reservoir formation. The results show that: (1) The west slope is a gentle slope which overlaps to the west, and nose structure is developed near the hydrocarbon generation depression, which is in the dominant direction area of hydrocarbon migration. A series of NE structural belts are developed on the slope and are favorable places for oil and gas accumulation. (2) The west slope can be further divided into the upper slope and the lower slope, and there are many kinds of oil and gas reservoirs, including structural, structural-lithologic and lithologic ones. In the upper slope, the major oil layer is Sartu controlled by structure; in the lower slope, multi-layers are oil-bearing, and the oil reservoirs are mostly composite ones. (3) Faults, unconformity surfaces and continuous sand bodies are the main channels of oil and gas migration; structure, sand body and fault jointly control the oil and gas enrichment in the slope; and the matching relationship between micro-amplitude and sand body, small fault and sand body control the oil and gas accumulation. On the basis of the above research, fine identification and effectiveness evaluation technology of composite trap has been developed through extensive study. Combination traps were identified by multiple technologies, including fault classification, micro-amplitude structure identification, fine sedimentation research, and lithologic trap identification by waveform indication inversion; and then the configuration relationship between fault and sand body, structural amplitude and sand body were analyzed to set up the evaluation criteria of effective traps. According to the criteria, the traps were selected to enhance the exploration success rate.

在对松辽盆地北部西斜坡油气勘探和地质研究现状的基础上，从构造，沉积等方面对控制储层形成，油气运聚的因素进行了重新研究。和储层形成。结果表明：（1）西斜坡是平缓的斜坡，与西重叠，在油气成因的主要方向区域，在成烃凹陷附近形成了鼻状构造。斜坡上发育了一系列NE结构带，是油气聚集的有利场所。（2）西斜坡又可分为上斜坡和下斜坡，油气藏类型很多，包括构造，构造岩性和岩性。在上斜坡，主要的油层受结构控制。在较低的斜坡上，多层是含油的，而油藏大多是复合油藏。（3）断层，不整合面和连续砂体是油气运移的主要渠道；结构，砂体和断层共同控制了斜坡的油气富集。微振幅与砂体，小断层与砂体的匹配关系控制了油气成藏。在以上研究的基础上，通过广泛的研究，开发了复合捕集阱的精细识别和效能评估技术。组合圈闭通过多种技术进行识别，包括断层分类，微振幅结构识别，精细沉积研究，通过波形指示反演识别岩性圈闭；分析了断层与砂体的构造关系，构造振幅和砂体，建立了有效圈闭的评价标准。根据标准，选择陷阱以提高勘探成功率。