Structural Characteristics And Three Dimensional Model Analysis Of The Guochang Dome In Dafang County,Guizhou

The Guochang dome is located in northwestern Guizhou Province,from the provincial capital of Guiyang city about 150km(straight distance),the administrative division is located in the Bijie area in Dafang County,the study area belongs to the Yangtze platform,the study area fold Development Zone,a large number of the northwest trending fold axial axis,between the range of 50-60 degrees,from the deformation degree of folds,with gentle-Open folds.The study area in other parts of South and north to the main fold axial and NNE,between 0 to 20 degrees azimuth axis,from the deformation degree of fold,to open folds,to Guochang dome,Pingzhai dome is the most typical.The pot factory is located in Guizhou Uplift along the northern margin of the North dome,near the northern depression area.The strata exposed in the study area are mainly Permian and Triassic strata.Through the analysis of a large number of field data,and laboratory data,combined with regional geological data,based on the geological investigation,according to the structure of the study area tectonic background,deformation characteristics,evolution characteristics and stratigraphic unconformity contact relation,the geological history of the study area is divided into four stages: the Yangtze platform basement formation stage,the Yangtze platform cover the development stage,the stage of continental basin evolution,Himalaya orogenic evolution stage.Although previous research has done a lot of work,but there are few geological models related to it.Therefore,the author hopes to provide a convenient three-dimensional model for the study of the structure of the Xiangshui area and its surrounding area by the 3D geological modeling of the dome.The author mainly uses the GOCAD 3D geological modeling software to model the dome of the boiler plant.The method of GOCAD software interpolation calculation is mainly using the DIS method,at the same time,it can freely select and automatically change the grid model.The 3D model can be constructed by modeling(Structural Modeling)and 3D reservoir modeling grid structure(3D Reservoir Grid Construction)two kinds of methods to complete,but the principle is different,each have their own advantages and disadvantages.3D geological model of the software can be built through the functionality provided by the analysis of the geological entity,its main functions include: Z axis rotation,zoom,dispersion,cover and individual display,three-dimensional cutting hollow profile,geological map and remote sensing map projection operations etc.Due to lack of research on regional boiler factory vault geophysical data,so the model of the process is mainly using two-dimensional geological maps,geological interface occurrence,measured sections,cutting profile control pot factory dome deep features,the model established on the basis of.Based on the hollow section with different depths and different directions,the horizontal extension of the dome and the geometric characteristics and structural characteristics of the deep in the pot are analyzed.Finally,the 3D model is used to calculate the area and volume of the Permian Longtan Formation in both sides of the platform,and interpret the deep features.