| P<sub>90%</sub> value || 50 ac || x 20 ft || x 350 bbl/ac-ft || = 350,000 bbl = P<sub>98.7%</sub> || P<sub>90%</sub> = 180,000 | | P<sub>90%</sub> value || 50 ac || x 20 ft || x 350 bbl/ac-ft || = 350,000 bbl = P<sub>98.7%</sub> || P<sub>90%</sub> = 180,000 |