Blind Reservoir Mapping
18 January 2024

During the first few days and weeks of a well’s production life, we use the drawdown data to determine the distance to and the type of boundaries (fault, strat, OWC, etc.) that are encountered in the reservoir.  We perform this analysis WITHOUT seeing the map first.  Seeing the map first or imposing a bounded region on the data creates bias.  Bias leads to bad decisions. 

In addition to the location of and types of boundaries, ODSI can also perform a boundary volumetric on the area observed (times the hydrocarbon-porosity thickness function) to determine the in-place hydrocarbons.  This value can then be compared to the In-place volumes observed via Static MBAL or the Connected and Mobile hydrocarbon volumes obtained from decline analysis.  The document provides examples of blind energy mapping, emphasizing the importance of integrating pressure/rate data in reservoir evaluation, and concludes with a discussion on the validity of blind mapping models and the requirements for generating results.