Structural Evolution and Hydrocarbon Accumulation of Balizhuang-Xuezhuang Buried Hill Belt in Jizhong Depression

Balizhuang-Xuezhuang buried hill belt is a typical fault-block buried hill belt in Jizhong Depression.The paper analyzes the forming and evolution process of Balizhuang-Xuezhuang buried hill belt by seismic and drilling data for the structural characteristics and reservoir-forming conditions.The results indicate that the evolution process of Balizhuang-Xuezhuang buried hill belt is divided into four phases.The first phase is the development of buried hill material from Meso-Neoproterozoic to Palaeozoic.The second phase is the forming of buried hill rudiment in Mesozoic.The third phase is the main development and formation of buried hill in Early Teriary.The last phase is the deep burial period of buried hill from Neogene to Quaternary.The tectonic events in Balizhuang-Xuezhuang area can be treated as the most important factor for evaluating hydrocarbon bearing potential in buried hills,due to their domination in oil resources,reservoir conditions,transporting conditions,trap-reservoir types in Balizhuang-Xuezhuang buried hill belt.