National Assessment of Oil and Gas Project - Yukon Flats Assessment Area (002) Assessment Units

The Assessment Unit is the fundamental unit used in the National Assessment Project for the assessment of undiscovered oil and gas resources. The Assessment Unit is defined within the context of the higher-level Total Petroleum System. The Assessment Unit is shown here as a geographic boundary interpreted, defined, and mapped by the geologist responsible for the province and incorporates a set of known or postulated oil and (or) gas accumulations sharing similar geologic, geographic, and temporal properties within the Total Petroleum System, such as source rock, timing, migration pathways, trapping mechanism, and hydrocarbon type. The Assessment Unit boundary is defined geologically as the limits of the geologic elements that define the Assessment Unit, such as limits of reservoir rock, geologic structures, source rock, and seal lithologies. The only exceptions to this are Assessment Units that border the Federal-State water boundary. In these cases, the Federal-State water boundary forms part of the Assessment Unit boundary.评估单元（Assessment Unit）是国家油气资源评估项目中用于评估未发现油气资源的基本单元。评估单元是在更高层级的含油气系统（Total Petroleum System）框架下完成定义的。本次展示的评估单元由负责该区块的地质学家通过解释、界定并绘图得到的地理边界所框定，其涵盖一组在含油气系统内具备相似地质、地理与时间属性的已知或推测油气藏，相关属性包括烃源岩、成藏时序、运移路径、圈闭机制以及烃类类型等。评估单元的边界在地质层面被定义为构成该评估单元的各类地质要素的分布范围，例如储集岩、地质构造、烃源岩以及盖层岩性的边界。唯一的例外情形为毗邻联邦-州水域边界的评估单元，在此类场景中，联邦-州水域边界将作为评估单元边界的组成部分。