Classification and exploration method of buried hill zones for metamorphic rock reservoir in Liaohe Depression

On the basis of large-scale exploration, research and practice, the concept of metamorphic rock has been summarized and put forward for the exploration of Liaohe buried hills. The theory of metamorphic rock interior hydrocarbon accumulation has been formed. Within the process of exploration, it has also been revealed that further research is necessary. In this paper, the idea has been presented that with the influence of reservoirs and transporting conditions for different buried hills new source and old reservoir type reservoirs with different accumulation characteristics have been formed in the effective transporting and accumulating units of buried hills, dominated by the source-reservoir double-factor coupling. Therefore, it is necessary to divide buried hills into different types and pinpoint distribution characteristics of various buried hill reservoirs so as to establish appropriate exploration methods for different types of buried hills.