Nice job. Valid was chosen because it communicates to our public or audience...the investor. "Valid" says to the investor "checked out" or "verified oil reserves". We like incorporating an element or something that communicates that.
What I particularly like about your design is the recognition that the topography above and below the surface is different. Below the surface there's oil so your wave captured the underground topography.
Consider the lower portion of the wave to be oil or the deeper you go the darker. The end of "the wave" should turn up into a gusher or symbol for energy...perhaps emanating up through one of the letters in Valid. The concept black oil... is the "energy" coming up through... "valid" is appealing.
We like stacking Valid over energy. The topography on top is bigger and grander than the topography below but I think a thicker font conveying plentiful reserves would be interesting to see.
Thank you very very much for your detail feedback :) I'm very happy with that. From your recent request I submit #48 #49 #50 #51 Hope you love it :) Please feel free if you want more revision.