Usually you need chemical engineering background as a start, gaining experience in your way.
Then you need to take some management courses. Like Shell, most of the senior management start their career with chemical engineering and from there they start to climb.
That's what you see in the surface, the actual fact is, you need to sell your self and park in the right jetty. This is the only way to climb up fast. I've seen a fellow becoming a senior manager within 10 years or so, is not because he is good, is because he is selected and playing the office politic game. More experience are better

Sort of, on middle to senior management post, they don't bother too much on paper.
https://www.linkedin.com/jobs2/view/7896203...view_browse_map
https://www.linkedin.com/jobs2/view/7797181...=0DzBtI5jfpQSY1
https://www.linkedin.com/jobs2/view/7079601...view_browse_map
Just to give you some examples.
When market are good, paper comes first, but with current situations, experience + paper

Well if you are in IT of shell than is different.