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大庆地区陆相砂泥岩薄互层AVO特性不明显,甚至 没有显示。本文以松辽盆地北部三肇地区为例详 细描述了3-D AVO分析方法及其在该区的应用效 果。通过对该区AVO数据的特殊处理和解释,并应 用有关的测井曲线指导AVO正演,在升81井扶余 油层得到了明显的砂岩气藏AVO响应,查明扶余油 层砂岩气藏存在着“振幅随炮检距增加而增大”这 一AVO异常特征。同时在三肇地区应用3-D AVO分 析技术首次发现了深层火山岩,查明了火山岩的 空间展布形态,其喷发的通道位于断裂的交叉处, 这与地球动力学和大地构造物理学的观点相吻合。
The Daqing area terrestrial sand and shale AVO thin interbedded layer is not obvious, even did not show. In this paper, the 3-D AVO analysis method and its application effect in this area are described in detail by taking the Sanzhao area in the northern Songliao Basin as an example. Through the special treatment and interpretation of the AVO data in the area and the application of the related logging curves to guide the AVO forward, an obvious AVO response of sandstone gas reservoirs has been obtained in the Fuyu Oilfield of Well Sheng 81 so that the existence of “The AVO Anomaly with Amplitude Increasing with Offset”. At the same time, deep volcanic rocks were discovered for the first time using 3-D AVO analysis technology in Sanzhao area, and the spatial distribution of volcanic rocks was identified. The eruption channels are located at the intersections of faults, which is closely related to the geodynamics and tectonics of geotectonics Match.