远砂坝能量相单元沉积模式及流动单元划分

Depositional pattern of distal bar energy unit and flow unit delimitation

基于单砂体内部特征(岩性、物性、厚度及其分布等)控制着驱油效率与波及体积,且又受控于其沉积过程,根据单砂体成因、形成过程,确定了微相单砂体及其内部能量单元的沉积模式,进而实现单砂体内流动单元的划分.以杏南PⅠ4单元远砂坝微相为例,建立了远砂坝能量相单元沉积模式,在此控制下,将远砂坝划为4类流动单元6级能量单元,并将远砂坝内部能量相单元、形成机制、流动单元有机结合,揭示了远砂坝内部流动单元平面分布规律.

Because the inner features of monosandbody ( lithology, physical quality, thickness and distribution and so on ) control the driving-oil index and affect its volume, and meanwhile it is controlled by its process of depositional microfacies, this paper puts forward the delimitation methods of flow unit in monosandbody, according to the depositional pattern of microfacies monosandbody and its inner energy units by the genesis and sedimentary process of monosandbody, taking distal bar microfacies in Xingnan PⅠ4~2 unit for example, and establishes distal bar energy unit depositional pattern. Under this controll, distal bar is divided into 4 kinds of 6 sublevel flow units, it combines the distal bar inner energy unit with the mechanism and flow unit organically, and reveals the planar distribution laws of distal bar inner flow unit.