Abstract: In recent years,many buried-hill oilfields have been found in the middle part of Hebei at depth of several thousand meters.Different explanations about the formation and distribution of these oilfields have been advanced.This paper attempts to describe the relationship between the inside structures of the buried-hills,the characteristics of development of their paleogeomorphological features and the distribution of the oilfields,based mainly on the abundant seismic and drilling data available.Data of deep wells drilled to the basement are integrated with aeromagnetic data,showing that the pre-Cambrian basement in middle Hebei was an uplift at the early stage.The changes of the thickness of the Paleozoic and Mesozoic strata bear witness of the process of development of the inside structures of the buried-hills and the time of their formation by the end of the Mesozoic as a result of two tectonic movements.The different paleogeomorphological landscape is the result of pre-Tertiary truncations.The development of the inside structures of the buried-hills and the landforms is found to be quite regular and has a close relationship with the distribution of buried-hill oilfields.Of particular interest is the NNE faulting which lasted very long and released enough energy to form prominent paleogeomorphological features.It is also an important factor in the formation of the Tertiary oil basins and distribution of buried-hill oilfields.

摘要： 一、古构造发育特征古潜山油藏和古构造的发育有着密切的关系.现将本区古构造发育特征列举如下:1.变质基底的古隆起近年来,随着任丘高产油田的发现,对冀中地区基底性质的研究,有了进一步认识.航磁资料在阜平、曲阳大片出露前震旦亚界地区,磁场变化平静,磁场值在正负100γ之间.磁异常呈北东走向.