下切谷研究进展综述  

Review of Incised Valley

作　　者：陈培元 

机构地区：[1]中海油研究总院,北京

出　　处：《地球科学前沿（汉斯）》2017年第1期67-76,共10页Advances in Geosciences

基　　金：“十二五”国家科技重大专项“高含硫气藏安全高效开发技术(编号:2011ZX05017-001)”;“十二五”国家科技重大专项“大型油气田及煤层气开发(编号:2011ZX05049)”共同资助。

摘　　要：下切谷的形成是海(湖)平面相对变化的结果,气候和构造运动的变化可以导致海(湖)平面相对变化。下切谷受形成机制和沉积环境特殊性的影响,具有独特的“U”字型或“V”字型几何特征,独特的形态导致其内沉积物在垂直于下切谷的地震剖面中表现为上超充填型和发散充填型反射结构特征,而在平行或近于平行下切谷走向的地震剖面上,谷内沉积主要表现为斜交型前积反射特征。由于影响下切谷形成与充填的因素众多,导致其一直以来没有一个令人满意的充填模式。下切谷作为一种特殊的层序内部组成要素,其侵蚀–充填演化模式对于层序划分、地层对比、恢复陆架区古环境及确定古海平面位置具有重要的意义。此外,下切谷在油气藏形成过程中既是良好的油气运移通道,又是良好的油气储集场所,对油气勘探均具有重要意义。The formation of incised valley is the result of relative change of sea (lake) level, which can be affected by the change of climate and tectonic movement. The incised valley is influenced by formation mechanism and sedimentary environment particularity, and it is characterized by symmetric or asymmetric “U” or “V”. Unique shape led that the interior sediment filling has a reflection character of onlap and divergent types in seismic section perpendicular to the incised valley. In parallel or nearly parallel to the incised valley, the interior sediment filling mainly reflects oblique type progradation characteristics. Because of many factors influencing the formation and filling of the incised valley, it has been without a satisfactory filling pattern. Incised valley as a special sequence of internal elements, the erosion-filling evolution model is important for sequence stratigraphy division, stratigraphic correlation, restoration for the ancient environment of continental shelf and determination for the ancient sea level position. In addition, the incised valley is an important migration channel and good reservoir of oil and gas in the process of reservoir formation, and it is of great significance for oil exploration.

关 键 词：下切谷 形成机制 充填模式 地质意义 

分 类 号：P61[天文地球—矿床学]