Generating dynamic reservoir descriptions using geostatistics in a geological model

A system for determining properties of a reservoir in a subterranean region using a geological model based on seismic data and transient pressure data, the system comprising one or more processing devices and one or more non-transitory machine-readable storage devices storing instructions that are executable by the one or more processing devices to cause performance of operations comprising:

• obtaining the geological model of the reservoir with petrophysical properties;
• populating a dynamic model of the reservoir with the petrophysical properties from the geological model;
• obtaining transient pressure data from a plurality of wells in the reservoir;
• generating and calibrating a plurality of sector models, each of the plurality of sector models corresponding to one of the plurality of wells in the subterranean region:
• for each sector model, update corresponding portions of the dynamic model with data from the sector model;
• performing geostatistical distribution to populate portions of the dynamic model for intermediate regions between the plurality of sector models;
• and
• calibrating the petrophysical properties of the intermediate regions of the dynamic model by:
• selecting one of the plurality of sector models;
• removing data associated with the selected sector model from the dynamic model;
• performing geostatistical distribution to populate petrophysical properties of the dynamic model for the selected sector model and intermediate regions between the selected sector model and adjacent sector models;
• and
• calibrating petrophysical properties for the intermediate regions between the selected sector model and adjacent sector models by running the dynamic model for the selected sector model and the intermediate regions between the selected sector model and adjacent sector models,
• comparing results of running the dynamic model with observed pressure test data for the selected sector model, and
• iteratively adjusting the petrophysical properties for the intermediate regions between the selected sector model and adjacent sector models until the model results for each value in a first set of values is within a threshold measure of accuracy to values in the transient pressure data for the well of the selected sector model.

A non-transitory machine-readable storage device storing instructions for determining properties of a reservoir in a subterranean region using a geological model based on seismic data and transient pressure data, the instructions being executable by a processing device to cause performance of operations comprising:

• obtaining the geological model of the reservoir with petrophysical properties;
• populating a dynamic model of the reservoir with the petrophysical properties from the geological model;
• obtaining transient pressure data from a plurality of wells in the reservoir;
• generating and calibrating a plurality of sector models, each of the plurality of sector models corresponding to one of the plurality of wells in the subterranean region:
• for each sector model, update corresponding portions of the dynamic model with data from the sector model;
• performing geostatistical distribution to populate portions of the dynamic model for intermediate regions between the plurality of sector models;
• and
• calibrating the petrophysical properties of the intermediate regions of the dynamic model by:
• selecting one of the plurality of sector models;
• removing data associated with the selected sector model from the dynamic model;
• performing geostatistical distribution to populate petrophysical properties of the dynamic model for the selected sector model and intermediate regions between the selected sector model and adjacent sector models;
• and
• calibrating petrophysical properties for the intermediate regions between the selected sector model and adjacent sector models by running the dynamic model for the selected sector model and the intermediate regions between the selected sector model and adjacent sector models,
• comparing results of running the dynamic model with observed pressure test data for the selected sector model, and
• iteratively adjusting the petrophysical properties for the intermediate regions between the selected sector model and adjacent sector models until the model results for each value in a first set of values is within a threshold measure of accuracy to values in the transient pressure data for the well of the selected sector model.