Abstract: The Lognormal modelling method is an efficient method for resource assessment and has widely been paid attention to in recent years.The paper details the oil-controled factors,rate of exploration success and the number of planning targets of the buried hill-typed plays in the Lower Paleozoic of the North Tarim,Results of this evaluation reveal not only the total hydrocarbon resources and the remaining play potential but also the number and sizes of undiscovered pools,which provide bases for further development planning.