Seismic Reservoir Characterization Of The Strawn Group, Northern Part Of The Eastern Shelf, King County, North-Central Texas: Case Study

This abstract discusses the results of combined poststack attri- butes and neural network procedures applied to the Strawn Group in the northern part of the Eastern Shelf in King County, North-Central Texas, covering an area of approximately 162 square miles (420 square kilometers). Although facies variability within the Strawn Group in King County has been described (e.g., Hattori and Flaig, 2023), the variations in elastic properties of carbonate facies have not been fully investigated. By combining a poststack model-based acoustic impedance, multiattributes and neural network procedures to predict veloci- ty ratios (Vp/Vs ratios), I show that although Strawn Group car- bonates are characterized by high impedance, they nevertheless can be separated into three main facies: (1) Platform carbonates in which Vp/Vs ratios vary from ~1.94 to 2.02, (2) Shelf-edge reef carbonates where Vp/Vs ratios are >2.02, and (3) Basinal and slope carbonates which are characterized by low Vp/Vs ratios ranging from ~ 1.88 to 1.96.