下寺湾油田张43井区长6油层沉积特征分析

摘要

The sedimentary characteristics of Chang6 oil reservoir in Zhang43 well block of Xiasiwan Oil Field are studies from single well facies,sedimentary microfacies and the relationship between sedimentary facies and oil rock in this paper.The results show that the type of studied sedimentary facies in the area is mostly delta facies,and the type of studied sedimentary microfacies is mostly underwater distributary channels,the side edges and underwater natural levees.The high quality reservoir in this area is mostly distributed in underwater distributary channels and the side edges,especially in underwater distributary channels.The reservoir is mostly affected by sedimentary microfacies,and the some separated parts are co-affected by sedimentary facies and diagenesis.%本文从单井相、沉积微相及沉积相与油层的关系等方面对下寺湾油田张43井区长6油层组沉积特征进行了研究，认为研究区沉积相类型主要为三角洲相，沉积微相类型为水下分流河道及其侧缘和水下天然堤。该区优质储层主要分布在水下分流河道与其侧缘，其中水下分流河道较多，储层多受沉积微相控制，少数不能连成片的受沉积相和成岩作用共同的影响。