基于GOCAD的巢湖北部区域的三维地质建模

Three-dimensional geological modeling of Northern Chaohu region based on GOCAD

三维地质建模是研究地质构造的重要手段。以巢湖北部地段为研究区,建立该地区的地层模型,探讨利用GOCAD软件进行三维地质建模的关键技术问题及细节。采用“三点法”来求未知区域产状,提出将岩层产状直接转换为在直角坐标系中的偏移量公式,并用此公式计算地表岩层在地下的延伸位置,使用GOCAD中SGrid方法模拟三维地质体。通过方法的综合运用,简化建模的流程,使模型更加符合真实的地质情况。

3D geological modeling is an important means to study geological structure.In this paper,the Northern Chaohu Area is taken as the study area,the stratigraphic model of the area is established,and the key technical problems and details of 3D geological modeling with GOCAD software are discussed.The"three-point method"is used to calculate the occurrence of unknown area,and a formula for directly converting the occurrence of rock strata into offset in rectangular coordinate system is proposed.The extension position of surface rock strata in the underground is calculated by this formula,and sgrid method in GOCAD is used to simulate three-dimensional geological body.Through the comprehensive application of the method,the modeling process is simplified and the model is more consistent with the real geological situation.