古地貌恢复方法综述

Review on methods of paleo-geomorphologic restoration

古地貌形态控制着沉积相类型和展布,从而控制油气藏的生储盖组合,因此,古地貌的准确恢复对油气勘探具有非常重要的意义.在前人研究的基础之上,利用高分辨率层序地层学法、双界面法、回剥和填平补齐法、构造沉积模拟法和沉积期微幅度古地貌推算法对古地貌恢复方法进行总结,结果表明,小区域内可利用双界面法进行古地貌恢复,对于构造运动强烈地区,应采用构造沉积模拟法,而针对一些微幅构造地区,沉积期微幅度古地貌推算法能较为准确地恢复古地貌.

Paleo-geomorphologic configuration controls the sedimentary facies types and distribution,thus controlling the source-reservoir-cap assemblage of oil and gas reservoirs.Therefore,the accurate restoration of paleo-geomorphologic donfiguraion is of great significance for oil and gas exploration.On the basis of previous studies,by using the high-resolution sequence stratigraphy method,dual interface method,stripping and filling method,tectonic sedimentation simulation method and micro-amplitude paleogeomorphology calculation method,the methods of paleo-geomorphologic restoration were summarized.The results show that the dual interface method can be used to restore the paleogeomorphology in small areas,the tectonic sedimentation simulation method should be used in the areas with strong tectonic movement,while for some microstructural areas,the micro—amplitude paleogeomorphology calculation method can more accurately restore the paleo-geomorphologic configuration.