乌尔逊凹陷构造演化研究-沉积学专业论文.docx

The study on tectonic evolution in the Wuerxun sagIntroduction of the author: Chenxiao, male, was born in january, 1984 whose tutor was Professor Li Zhongquan. He graduated from Chengdu University of Technology , his major isgeology（sedimentology）and was granted the Master Degree in June, 2010.AbstractHailar basin is a basin of muti-stage tectonical cycle and of superposition, and with the characteristic of multiple and short source, rapidly changing phase and complicated fault system. Its structural position is special; it was transformed greatly by the late tectonic; it owns multi-phase gas and oil reservoirs. And it is a key exploration area in the external basins of Daqing Oilfield.This study preliminarily analysis the geometric characteristic of Wuerxun sag in Hailar Basin by establishing stratigraphic framewok based on structural interpretation; restore the denudation which was caused by the late regional tectonic of each structural layer by the erosion quantity technology ; analyse emphatically the characteristic of the profile and graphic evolution; realize the tectonical geology that comply with the actual characteristic of regional tectonial deformation and lay a solid foundation for the further exploration of oil and gas. Through this study, the main task and understanding are as follows:(1)Establish so-when stratigraphic framewok and structural geological model bythe guildance of the stratigraphic theory and methodology; interpret the structure by the application of integrated seismic and geological methods.(2)Wuerxun undergone multi-stage composition and transformation. And therefore there were several basal unconformity (stages of erosion).To conduct the analysis of evolution, the eroded formation that located under the unconformity must be restored. This report calculates the gross denudation by adopting two methods of acoustic time and seismic tendency and establishing the evolution model of forming and transforming of the basin. And then worked out