【摘要】 近年来在松辽盆地北部西部斜坡区开展了5个区块的三维地震勘探,油气勘探取得重大突破。通过分析西部斜坡区二、三维地震在构造解释方面的差异及三维地震属性在储层预测中应用,进而对成藏有利区进行预测,最后对三维地震资料的应用效果进行评价。分析认为,西部斜坡区二、三维地震层位解释基本一致,只有个别层位地质意义有差别;三维地震取消和增加了多个断层,少量保留的断层在形态、延伸长度和搭接关系上差异较大;二、三维地震解释的局部构造差别较大,表现为圈闭平面位置变化、圈闭面积和幅度增加。PY工区32口井三维地震振幅属性符合率62.5%～71.9%,能够很好地用于储层预测。研究认为西部斜坡区成藏有利区应为构造有利区和砂体富集区的叠合部位。西部斜坡区三维地震资料应用效果显著,一是31口探评井振幅属性后验井符合率60%～84%,二是在西部斜坡区提交了超过6×10~7 t的石油地质储量,三是7口开发试验井钻井成功率100%。西部斜坡应加大三维地震勘探的力度。更多还原

【Abstract】 In recent years, five blocks of 3D seismic exploration have been carried out in the western slope area of northern Songliao Basin, and great breakthroughs have been made in oil and gas exploration. Based on the analysis of the differences in structural interpretation between the 2D and 3D seismic data in the western slope and the application of 3D seismic attributes in reservoir prediction, the favorable areas for reservoir formation are predicted. Finally, the application effects of 3D seismic data are evaluated. It is concluded that the interpretation of the 2 D and 3D seismic formations in the western slope area is basically the same, and only the geological significance of individual formations is different. 3D seismic data cancels and increases many faults, and a small number of retained faults are different in shape, extension length and overlap relationship. The difference of local structures in 3D seismic interpretation is quite great, which is shown by the variation of trap plane position, the increase of trap area and amplitude. The coincidence rate of 3D seismic amplitude attribute of 32 wells in PY area is 62.5%～ 71.9%. It can be used well in reservoir prediction. It is considered that the favorable reservoir forming area in the western slope area should be the superposition of the tectonic favorable area and the sand body rich area. The application of 3D seismic data in the western slope area is remarkable. One is that the coincidence rates of the amplitude attributes of 31 exploration and evaluation wells are 60% ～ 84%, and the other is that more than 6×10~7 tons of petroleum geological reserves have been submitted in the western slope area. Third, the drilling success rate of 7 development test wells is 100%. The 3D seismic exploration should be strengthened on the western slope.更多还原