--> Figure 2. Well logs and other data from the Texaco Tulugak well in the foothills belt of the Colville Basin.

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Figure 2. Well logs and other data from the Texaco Tulugak well in the foothills belt of the Colville Basin. Solid green bars drill-stem test intervals with pressure gradients in pse/ft; GTS indicates that gas flowed to surface during the test. Red lines in gas show column indicate depth extent of gas shows from drill-stem tests (DST) and mud log (C1, methane; C2, ethane and heavier gases). Total organic carbon and vitrinite reflectance were measured on drill cuttings.