USGS National and Global Oil and Gas Assessment Project - the Volga-Ural Basin and Timan-Pechora Basin Provinces of Russia: Assessment Unit Boundaries, Assessment Input Forms, and Fact Sheet Data Tables

This data release contains the boundaries of assessment units and input data for the assessment of undiscovered gas resources in the Volga-Ural Basin and Timan-Pechora Basin Provinces of Russia. 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 herein 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. Machine-readable tables are provided that contain the input and results for each assessment unit summarized in the USGS Fact Sheet. Methodology of assessments are documented in USGS Data Series 547 for continuous assessments (https://pubs.usgs.gov/ds/547) and USGS DDS69-D, Chapter 21 for conventional assessments (https://pubs.usgs.gov/dds/dds-069/dds-069-d/REPORTS/69_D_CH_21.pdf). See supplemental information for a detailed list of files included this data release.本数据集发布内容包含俄罗斯伏尔加-乌拉尔盆地（Volga-Ural Basin）与季曼-伯朝拉盆地（Timan-Pechora Basin）省域内未发现天然气资源评估所需的评估单元（Assessment Unit）边界与输入数据。 评估单元是美国国家未发现油气资源评估项目的基本评估单元。 评估单元依托更高层级的完整石油系统（Total Petroleum System）进行定义。 本文件中的评估单元以负责该省域的地质学家所解译、定义并圈定的地理边界呈现，其包含一系列在完整石油系统内具有相似地质、地理与时间属性的已知或推测油气藏，例如烃源岩、成藏时间、运移路径、圈闭机制以及油气类型。 评估单元边界在地质上被定义为构成评估单元的各类地质要素的范围，例如储集岩、地质构造、烃源岩以及盖层岩相的分布边界。 本数据集提供了可机器读取的表格，其中包含美国地质调查局（USGS）情况说明书中汇总的各评估单元的输入数据与评估结果。 评估方法的相关文档：连续型资源评估方法详见USGS数据系列547（https://pubs.usgs.gov/ds/547），常规型资源评估方法详见USGS DDS69-D第21章（https://pubs.usgs.gov/dds/dds-069/dds-069-d/REPORTS/69_D_CH_21.pdf）。 本数据集包含的完整文件清单，请参阅补充信息。