The Structural Evolution Of Kongdian Formation And Their Control On Prototype Basin In Jiyang Depression

Paleogene Jiyang deep is becoming the focus of exploration targets, particularly in the Kongdian period, due to faults in the Mesozoic, the basin to the NW to the Cenozoic of NE (NEE) to fault-controlled basin of the transition, to study the formation characteristics, fracture characteristics and tectonic evolution of the distribution reveal the deep reservoirs of great importance. In this thesis, guided by structural geology, Sequence stratigraphy, sedimentary stratigraphy and so on, combined with seismic geology, regional background and local fracture of the earth the regional dynamics and tectonic evolution of the combination of means, carried out Jiyang depression tectonic evolution and their control on the prototype basin in transition.To analyze the study elements of the fault system is based, summarizes the fault system in the transition of the features of the law, combined with regional dynamic mechanism, the use of layer stripping method recovery back to main profiles in Jiyang depression. To study evolution of structural balance through the section of the drawing and research focus of Jiyang tectonic evolution in the transition, and their control on the sedimentary basin and the pattern.The results show that:the fault control of basin development and evolution has migration and distinct stages. To fault basin, the faults not only controlled the development of basin evolution, but also determine the pattern of the basin of deposition. By balancing the production profile that in the use of layer recovery back stripping Law, the combination of fault can be a good solution to determine the structure of deformation, tectonic superposition, tectonic inversion and so on, deepening the regional tectonic evolution and local fracture evolution. Summarized tectonic evolution and comparison of other depression in Bohai Bay Basin. To tectonic evolution based on analysis of the causes of erosion, can be divided into different fault activity lead to erosion, tectonic uplift led to erosion and the interaction between the two led to erosion, and from the perspective of tectonic evolution and superposition of the basin to divide regional of erosion type. Kongdian transition tectonic evolution of the prototype is the gradual transformation of the basin. During the Ek2 period, the transformation of tectonic evolution of the basin belongs to the local transformation, during the Ek1 period, the transformation of tectonic evolution of the basin expanded, showing inheritance and development, during the Es4 period, the transformation of tectonic evolution of the basin shows inheritance and to reconstruct and transform the inherited and stereotype.