Patent ID: 11867861
Assignee: SAUDI ARABIAN OIL COMPANY
Field: Measurement (Instruments)
Classification: CPC G  E | IPC E  G

Claim 0:
1. A method of identifying elastic facies in non-key wells as part of Log Quality Control (LQC) comprising:
identifying a data quality of well data associated with each of a plurality of wells in a region having a geological framework;
selecting one or more key wells from the plurality of wells, the selected one or more key wells being associated with higher quality well data relative to lower quality well data associated with one or more non-key wells of the plurality of wells in the region;
building a reference model of elastic facies using the higher quality well data of the selected one or more key wells, the reference model identifying each of the elastic facies, wherein building the reference model comprises determining expected ranges of values, for spectra data, that represent each of the elastic facies of the geological framework;
propagating the reference model to the lower quality well data of the one or more non-key wells of the plurality of wells in the region by:
benchmarking the lower quality well data of the one or more non-key wells with the reference model, wherein benchmarking comprises determining, for each of the elastic facies of the reference model, whether spectra data of the lower quality well data are within the expected ranges of values specified by the reference model and based on the geological framework of the plurality of wells in the region;
calibrating, based on the benchmarking, the lower quality well data of the one or more non-key wells with the reference model by flagging outlier data without use of well markers or petrophysical analysis of the one or more non-key wells, the outlier data not being associated with any of the identified facies of the reference model;
predicting, based on the calibrating, for the one or more non-key wells, the values for spectra data that are missing in the lower quality well data; and
estimating, based on the predicted values for the spectra data for the lower quality well data and the reference model of the higher quality well data, a presence of hydrocarbons at or near the one or more non-key wells of the plurality of wells in the region.