I am going to try to post what I have sent to others. Mind you, several months ago I was in the same shoes that you are in, and would not have made it if not for others on the Cove who shared information with me. So am only paying it forward.
Please do a search on API, Oil and Gas, Oil Industry, Q1, and see what you can find. Search is a great function of this forum. Also, if you scroll all the way down to the bottom of the page, you are likely to see other threads on this very subject. Another great thing about the Cove.
Hope this will help.