Till there's a global solution to the energy problem we'll need oil. Existing solutions are nowhere close to being sufficient, therefore divestment will have no impact on the amount of oil burned. It's ridiculous to think that clicking a sell button on some assets will fix global warming, that's not how the world works.
https://en.wikipedia.org/wiki/World_energy_consumption
As Bill Gates says, we need to fight two fronts of misinformation: a) that global warming is not a problem, and b) that it is an easy problem.