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以区域沉积背景为基础,通过岩心观察与描述,建立岩电关系,充分利用测井资料并结合区域地质资料进行综合研究。由单井相到相剖面,再到沉积微相的平面展布,按照由点到线再到面的步骤进行沉积微相的划分。研究表明,东仁沟区延10油层组属曲流河相沉积,区内主要发育河床、堤岸、河漫3种亚相,进一步划分为天然堤、河漫滩等微相类型。顺物源方向,分流河道砂体连续分布。长1期以三角洲平原分流间湾、分流间沼泽沉积为主,局部夹小型分流河道、决口扇沉积。垂直物源方向,分流河道砂体连续分布,向西北方向呈逐渐变薄的趋势,纵向上,分流河道砂体之间被分流间湾泥岩、粉砂质泥岩分隔,局部发育决口扇、分流间沼泽微相沉积。
Based on the regional sedimentary background, through the observation and description of the core, the establishment of the relationship between rock and electricity, make full use of well logging data and regional geological data to conduct a comprehensive study. From single-well facies to facies sections, and then to the distribution of sedimentary microfacies plane, in accordance with the steps from point to line to the surface sedimentary microfacies division. The study shows that the Yan 10 oil layer in Dongrengou zone belongs to meandering river facies sedimentation. There are mainly three subfacies of riverbed, embankment and river diffuse in the area, which are further divided into microfacies types such as natural dike and river floodplain. Shun material source direction, distributary channel sand body continuous distribution. The first phase of delta plain shunt Bay, shunt between the main swamp deposition, local folder small distributary channel, the mouth of the mouth deposition. In the direction of vertical provenance, distributary channel sand bodies are continuously distributed and tend to be thinner in the northwest direction. In the longitudinal direction, distributary channel sand bodies are separated by shunt bay mudstone and silty mudstone, Swamp microfacies deposition.