【摘要】 盆地的古地形地貌不仅控制着其后期沉积相的发育和分布,同时在一定程度上控制着后期油藏的储盖组合,尤其是潜山顶部的次生溶蚀孔隙更是受古暴露期大气水淋滤作用的控制,溶蚀作用随距不整合面距离增大而减弱.利用回剥和填平补齐法对贝尔凹陷布达特群古地貌进行了恢复,结果表明,在兴安岭群沉积之前贝尔凹陷布达特群具有东高西低的总趋势,与现今潜山顶面构造图比较,有古高今低、古今均高、古低今高和古今均低4种情形,前2种情况更利于形成溶蚀风化壳型储层.更多还原

【Abstract】 The palaeotopography of a basin controls the development and distribution of its sedimentary facies.It also controls the reservoir-seal association.The secondary dissolution pores on the top of the buried hill are,in particular,controlled by leaching process in the ancient period of exposure.Denudation weakens with distance from the unconformity surface increases.The results of palaeogeomorphic resuming of Budate group in Beier depression show that the west part of Budate group in Beier depression is lower than east part before Xing’anling Group deposited.Compared with the modern tectonic diagram of the top of the buried hill,there are four possibilities:ancient ones are higher than modern ones,ancient ones and modern ones are both high,ancient ones are lower than modern ones,ancient ones and modern ones are both low.The former two possibilities will play a constructive role in the formation of denudation-weathered crust reservoir rocks.更多还原