This is about geopolitics, not economics. The Saudis want to marginalise Russia as a big player, show that they are still the bosses of OPEC, and, as a bonus, have a (temporary) shot at discouraging fracking and other production developments. Good luck to them on the last 'benefit'; won't happen.
The problem with marginalising Russia, whose economy IS in the crapper, is the increasing warlike tendencies of Putin and his crowd. Don't know how that will play out, but it WILL be dicey.
That says it all --thanks! It's so easy to get suckered into the con when a political hack tries to pawn off a price change (be it oil, wages, whatever) on a political agenda. I know better when they try to say global warming is science, but the econ rants tend to sneak in under my radar.