National Assessment of Oil and Gas Project - Williston Basin Province (031) Total Petroleum System

The Total Petroleum System is used in the National Assessment Project and incorporates the Assessment Unit, which is the fundamental geologic unit used for the assessment of undiscovered oil and gas resources. The Total Petroleum System is shown here as a geographic boundary defined and mapped by the geologist responsible for the province and incorporates not only the set of known or postulated oil and (or) gas accumulations, but also the geologic interpretation of the essential elements and processes within the petroleum system that relate to source, generation, migration, accumulation, and trapping of the discovered and undiscovered petroleum resource(s).

含油气系统（Total Petroleum System）被应用于国家油气资源评价项目，其包含评价单元（Assessment Unit）——该单元是开展未发现油气资源评价的基础地质单元。本次展示的含油气系统由负责该油气省的地质学家定义并填绘地理边界，其不仅涵盖了已知或推测的油气藏（或气藏）集合，还包含了对该油气系统内与已发现和未发现油气资源的烃源岩、生烃作用、油气运移、聚集以及圈闭相关的关键要素与地质过程的地质解释。