The model layer facies grids describe geographic variations in lithology mixtures (facies) used in the 3D petroleum systems model of the Williston Basin. The grids provide constraints on the physical properties used in the model simulation, including mechanical compaction, thermal conductivity, heat capacity, radiogenic heat, porosity and permeability trends, diagenesis, and capillary entry pressures. The grids were derived from borehole geophysical log signatures from two key model layers: the middle member of the Devonian-Mississippian Bakken Formation and the Upper Ordovician Icebox Formation. All the other model layers used a single lithology mixture and were not represented by gridded facies maps. This is a child item of a larger data release titled "Data release for the 3D petroleum systems model of the Williston Basin, USA".

A 3D petroleum systems model requires that the temperature at the sediment surface be defined at each geological time step. Generally, surface temperature can be modeled from paleo-elevation or paleo-water depth history, as well as the paleo-latitude of the basin and global climate patterns through time. The PetroMod software, from which the 3D petroleum systems model was generated, uses the Sediment-Water Interface Temperature (SWIT) tool to help define these boundary conditions. In most time steps, the model assumes that paleo-water depth/elevation was flat and uniform across the basin. In these time steps, surface temperatures in the model do not vary across the basin and are determined by the paleo-latitude (taken at the center of the basin) and the global mean temperatures at sea level. In ten other time steps, however, the model considers variations in paleo-water depth. These ten cases are defined in ASCII grids that show variations in surface temperature, measured in degrees Fahrenheit, in response to paleo-water depth, paleo-latitude, and mean global temperature at the given time step. This is a child item of a larger data release titled "Data release for the 3D petroleum systems model of the Williston Basin, USA".

A 3D petroleum systems model requires that the temperature at the sediment surface be defined at each geological time step. Generally, surface temperature can be modeled from paleo-elevation or paleo-water depth history, as well as the paleo-latitude of the basin and global climate patterns through time. The PetroMod software, from which the 3D petroleum systems model was generated, uses the Sediment-Water Interface Temperature (SWIT) tool to help define these boundary conditions. In most time steps, the model assumes that paleo-water depth/elevation was flat and uniform across the basin. In these time steps, surface temperatures in the model do not vary across the basin and are determined by the paleo-latitude (taken at the center of the basin) and the global mean temperatures at sea level. In ten other time steps, however, the model considers variations in paleo-water depth. These ten cases are defined in ASCII grids that show variations in surface temperature, measured in degrees Fahrenheit, in response to paleo-water depth, paleo-latitude, and mean global temperature at the given time step. This is a child item of a larger data release titled "Data release for the 3D petroleum systems model of the Williston Basin, USA".

These data tables describe the inputs and parameters for the 3D petroleum systems model. This section of data is included for users wishing to rebuild the 3D basin model from scratch, either in PetroMod or another basin modeling software package. All inputs and settings for model construction are included. Settings summaries are provided in a data bundle of comma-separated value (CSV) tables. Also included is the “Williston_Basin_model_inputs_glossary.csv” data table that provides a brief description of all the columns/value fields in the data bundle. This is a child item of a larger data release titled "Data release for the 3D petroleum systems model of the Williston Basin, USA".

These data tables describe the inputs and parameters for the 3D petroleum systems model. This section of data is included for users wishing to rebuild the 3D basin model from scratch, either in PetroMod or another basin modeling software package. All inputs and settings for model construction are included. Settings summaries are provided in a data bundle of comma-separated value (CSV) tables. Also included is the “Williston_Basin_model_inputs_glossary.csv” data table that provides a brief description of all the columns/value fields in the data bundle. This is a child item of a larger data release titled "Data release for the 3D petroleum systems model of the Williston Basin, USA".

The missing section grids describe geographic variations in erosion associated with unconformities in the 3D petroleum systems model. The grid values provide inputs for the model to restore layer thicknesses prior to erosion events and at the time of deposition. Each missing section grid here describes the depth of material that was eroded at 70, 50, 43, and 20 million years ago in the model. This is a child item of a larger data release titled "Data release for the 3D petroleum systems model of the Williston Basin, USA".

The missing section grids describe geographic variations in erosion associated with unconformities in the 3D petroleum systems model. The grid values provide inputs for the model to restore layer thicknesses prior to erosion events and at the time of deposition. Each missing section grid here describes the depth of material that was eroded at 70, 50, 43, and 20 million years ago in the model. This is a child item of a larger data release titled "Data release for the 3D petroleum systems model of the Williston Basin, USA".

The stratigraphic horizon grids were generated by picking formation tops in 16,200 borehole geophysical logs and interpolating between them in the Williston Basin of North Dakota, South Dakota, and Montana. Collectively, the horizon grids outline the structural framework of the Williston Basin from the ground surface to the crystalline basement. The grids define the boundary surfaces between geologic layers in the 3D petroleum systems model. Not every horizon in the petroleum systems model, however, ties to a specific interpreted set of formation tops (see the ‘Williston_Basin_data_overview.csv’ table to see which horizons were derived from interpreted formation tops). Some horizons were split/calculated to accommodate source rock intervals or net evaporite thicknesses (denoted halite or anhydrite in the file name suffix). Although some lithostratigraphic units are not present throughout the entire area of interest (AOI), the petroleum systems model requires that each grid cover the entire AOI. Another requirement for the petroleum systems model is that each horizon grid be assigned a geologic age. This is a child item of a larger data release titled "Data release for the 3D petroleum systems model of the Williston Basin, USA".

This data release includes the model input and output files for the 3D petroleum systems model of the Williston Basin. The model was created in Schlumberger's PetroMod version 2020.1. The enclosed folders are standard PetroMod format and contain all data necessary for defining and re-simulating the model. Please contact Tim Nesheim at the North Dakota Geologic Survey (tonesheim@nd.gov) directly for static temperature log data used in the temperature calibration. Proprietary IHS Markit ® (2022) data used for model calibration are also not included in this data release. This is a child item of a larger data release titled "Data release for the 3D petroleum systems model of the Williston Basin, USA".

This data release includes the model input and output files for the 3D petroleum systems model of the Williston Basin. The model was created in Schlumberger's PetroMod version 2020.1. The enclosed folders are standard PetroMod format and contain all data necessary for defining and re-simulating the model. Please contact Tim Nesheim at the North Dakota Geologic Survey (tonesheim@nd.gov) directly for static temperature log data used in the temperature calibration. Proprietary IHS Markit ® (2022) data used for model calibration are also not included in this data release. This is a child item of a larger data release titled "Data release for the 3D petroleum systems model of the Williston Basin, USA".