WTI oil is in a LT downtrend, with relatively consistent patterns mimicking LT cycles in equities. A monthly chart with centered MAs of 80/40/20 etc shows a downtrending channel ranging from 85 to 25, and this is month 31 with next low due mid 2019. I suspect the shale oil situation would become dire long before prices reached the lower end of the range.
XLE is in a downtrending channel around the 72day CMA ranging 7675-7150. The 43week channel is uptrending with low approx 7250.
A break to 7200 would probably lead to 65.00, but chart potentials are much lower with a drop below 60 making lower 20's possible if recessionary forces put economy in a tailspin.
Oddlot
Stay on the right side of the cycle!