叠后正演模拟不仅能更好地解释平缓构造背景下的地震数据,而且有助于描述地震资料无法分辨的地质体.东河砂岩是塔里木盆地已知的储集层,横向展布不均匀,由于地震分辨率的限制,很难准确描述东河砂岩的空间展布.用叠后地震正演模拟方法研究东河砂岩尖灭点分布,发现合成地震振幅能量首先增强,然后衰减,其中还存在地层上拉和假倾角现象.这些特征有助于对东河砂岩尖灭点进行地震解释.%Post-stack seismic forward modeling can be used to better interpret seismic data in gently dipping geologies andcharacterize geological body of even sub-seismic resolution by revealing the characteristic seismic responses. The Donghesandstone of the Tarim Basin is a known oil reservoir with widespread but irregular lateral distribution. Because of the limitof the seismic resolution, it is difficult to delineate the spatial distribution of the sandstone. Post-stack seismic forwardmodeling on the Donghe sandstone pinchout distribution shows characteristic responses on synthetic seismic data of firstamplitude enhancement and then decay, and false dip and pushup of overlying reflections. These indicators form aninterpretation tool for locating the Donghe sandstone pinchout on seismic. Figure 5 reference 10
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