利用正演模型识别桩西地区在沙河街组地层剥蚀点

Denudation point identification of Es in Zhuangxi area by the application of forward model

地震资料的假象或陷阱会导致错误的解释。针对沙河街组地层剥蚀地质现象,通过模拟围岩与残余地层厚度变化造成的地震响应特征,开展了砂泥岩地质建模与正演。通过多种类型剥蚀尖灭的地质模型进行正演模拟,破除地震资料假象,指引正确的解释方向,识别剥蚀点,落实地层圈闭。

Seismic data false appearance or pitfalls can lead to wrong interpretation. In view of the geological phenomenonof layer denudation of Es, the sandstone and mudstone geological modeling and forward modeling are carriedout through the simulation of the seismic response characteristics caused by surrounding rock and the changesof the residual strata thickness. The false appearance of the seismic data is removed out by the forward modeling ofgeological model of variable types of denudation pinchout. Finally the seismic data is interpreted correctly, the denudationpoints are identified to determine stratigraphic traps.