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The average gas-oil ratio produced from the Upper Washita Fredericksburg formation of the Summerland Field is...

The average gas-oil ratio produced from the Upper Washita Fredericksburg formation of the Summerland Field is 275 scf/STB. The gravity of the produced oil is 26°API. The color of the stocktank oil is black.

a). What type of reservoir fluid is in this formation?

b). Laboratory analysis of a sample from the Summerland (Upper Washita-Fredericksburg) Field indicates a ratio of volume oil leaving the reservoir to volume of oil arriving at the stock tank of 1.10 res bbl/STB. Does this information confirm your answer to 1)? Why or why not?

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