Through systematic analysis of the firsthand data of several important wells in the north tarim which is about drilling, logging, oil testing and combined with large number of analysis materails, core and microscope observation, this paper studies the weathered crust karst reservoir and insider karst reservoir’s genesis characteristics, distribution regularities, evaluation and prediction, etc.

The karst waterlogging areas of Guangxi are widely distributed in typical karst landforms such as peak-cluster depression,peak-cluster valley,karst plains,and the transitional zone between karst areas and the other areas.

The exploration ideas as"selecting dominant lithology,searching barrier inside the buried hill and prospecting the reservoir inside the buried hill"are sug- gested,which present a theoretical base for the exploration in hydrocarbon reservoir inside metamorphic buried hill in Liaohe depression.