Patent ID: 11927717
Assignee: LANDMARK GRAPHICS CORPORATION
Field: IT methods for management (Electrical engineering)
Classification: CPC G  E | IPC E  G

Claim 7:
8. A production analysis and control system, the system comprising:
a production logging tool having a plurality of sensors thereon configured to acquire production data from a reservoir;
a processor in data communication with the production logging tool; and
a memory device coupled to the processor, the memory device containing a set of instructions that, when executed by the processor, cause the processor to:
generate an ensemble of reservoir models using geological data representing petrophysical properties of the reservoir;
acquire production data corresponding to a first time instance from the reservoir;
perform normal score transformation on the ensemble of reservoir models to transform an original distribution of the ensemble of reservoir models into a normal distribution of the ensemble of reservoir models and perform normal score transformation on the acquired production data to transform an original distribution of the acquired production data into a normal distribution of the acquired production data;
generate a weighting function comprising a plurality of weights using a distance function, wherein the distance function determines a distance from each of a plurality of points in at least one grid block to a well within the reservoir;
update the generated ensemble based on the transformed acquired production data using an ensemble Kalman filter (EnKF) and the weighting function;
transform the updated generated ensemble back to the original distribution of the ensemble of reservoir models and transform the acquired production data back to the original distribution of the acquired production data; and
performing a flow simulation for at least one future time period using the updated ensemble to generate one or more predictions of future reservoir behavior comprising bottomhole pressures, fluid production rates, or formation permeability for the reservoir based on the updated ensemble.