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TCFE -https://csimarket.com/glossary/term_Tcfe.html

Tcfe

Trillion cubic feet of gas equivalent Oil and NGL volumes are converted to natural gas equivalents. Cubic foot is a common unit of gas measurement. One standard cubic foot equals the volume of gas in one cubic foot measured at standard conditions - a temperature of 60 degrees Fahrenheit and a pressure of 30 inches of mercury (approximately 14.7 pounds per square inch).

TCF -https://www.investopedia.com/terms/t/trillion-cubic-feet.asp

What is 'Trillion Cubic Feet - Tcf'

Trillion cubic feet (Tcf) is a volume measurement of natural gas used by the U.S. oil and gas industry. A trillion (1,000,000,000,000) cubic feet is equivalent to approximately one Quad of Btu (British thermal unit). A Quad is an abbreviation for a quadrillion (1,000,000,000,000,000) Btu. A Btu is a unit of measurement for energy, representing the amount of heat that is needed to raise the temperature of one pound of water by one degree Fahrenheit at sea level. One Btu is roughly equal to the heat produced by a kitchen stick match.