Barrels of oil equivalent per day (boepd) includes natural gas. “Bopd” is only the oil. Generally speaking, one can divide the number of cubic feet of natural gas by 6,001 to get the equivalent of oil. The number can vary depending on quality of the natural gas but 6,001 seems to work well every time I’ve used it. Note that there are different grades of oil: sweet oil is most expensive. North Dakota oil is sweet oil. Likewise, natural gas has different amounts of energy and much more difficult for me to understand. Natural gas quality is defined in British thermal units (BTU).