Seismic Reservoir Characterization of Distributary Channel Sandstones in the Lower Cretaceous Paluxy Reservoir, Delhi Field, Louisiana

Robinson, Holly (Colorado School of Mines) | Davis, Tom (Colorado School of Mines)



High permeability channel sandstone bodies are present in the Paluxy. These channel bodies must be considered when planning a CO2 enhanced oil recovery program because their sandstone presence will influence the CO2 flow pathways and influence the optimal placement of injector and producer wells to improve oil recovery.

Delhi Field is composed of distributary channel sandstones of the Lower Cretaceous Paluxy Formation. The Exponential Pursuit Matching Decomposition method through Sigma3’s SpecMAN software was used to spectrally decompose and interpret the seismic survey. The objective of breaking down the seismic volume into frequency cubes through spectral decomposition was to identify the presence and delineate distributary channel sandstone bodies and improve the time-lapse seismic interpretation and reservoir characterization of Delhi Field.

Spectral decomposition resulted in improved imaging of distributary channel sandstones. Core, well logs, and seismic data were calibrated and used to interpret the depositional environment of the Paluxy, which was interpreted as a straight distributary channel system on a delta plain. The peak frequency and coherency volumes provided detailed sandstone thickness and width values, which provided detailed information to improve the geologic and reservoir models and aided in delineating well locations to improve sweep efficiency.