USGS National and Global Oil and Gas Assessment Project - Raton Basin-Sierra Grande Uplift Province: Assessment Unit Boundaries, Assessment Input Data, and Fact Sheet Data Tables

This data release contains the boundaries of assessment units and input data for the assessment of coalbed gas resources in the Raton Basin-Sierra Grande Uplift Province, Colorado and New Mexico. 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. 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. In addition to the shapefile, for U.S. assessments, allocation tables are provided that enumerate percentages assigned to various land categories. Machine-readable tables are also 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.

本数据集发布包含科罗拉多州与新墨西哥州拉顿盆地-谢拉格兰德隆起省（Raton Basin-Sierra Grande Uplift Province）煤层气资源评估所用的评估单元（Assessment Unit）边界与输入数据。
评估单元是美国国家油气资源未发现量评估项目的基本评估单元，其在更高层级的含油气系统（Total Petroleum System）框架内完成定义。本次发布的评估单元以负责该研究区的地质学家解译、界定并填绘的地理边界呈现，涵盖了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，包括烃源岩、成藏时序、运移路径、圈闭机制与烃类类型等核心要素。
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、烃源岩与盖层岩性的分布边界。唯一例外的情形是与联邦-州界水域接壤的评估单元，此类情况下，联邦-州界水域将作为评估单元边界的组成部分。
除形状文件（shapefile）外，针对美国境内的评估项目，本数据集还提供了各类土地类别的占比分配表；同时附带可机读表格，汇总了美国地质调查局（United States Geological Survey）情况说明书中各评估单元的输入数据与评估结果。
连续型油气资源评估方法的文档详见USGS数据系列547（https://pubs.usgs.gov/ds/547），常规型油气资源评估方法的文档详见USGS DDS69-D第21章（https://pubs.usgs.gov/dds/dds-069/dds-069-d/REPORTS/69_D_CH_21.pdf）。
有关本数据集发布所包含的完整文件清单，请参阅补充信息。