It seems that except Daqing and Karamay oil fields, undergraduates are cadres when they enter domestic oil companies. If you have something to do with cadres at or above the official level in an oil field and there is nothing to say, then choose. If you are struggling alone, I suggest you go to new oil fields, such as PetroChina CBM Company, Tarim Oilfield and Changqing Oilfield. If you do well in this field and know how to do things, the chances of rising are quite high. I know a student who has nothing to do at home. He will be a supervisor for half a year after going to coalbed methane, and if he can see things and do things, some invisible income is still considerable, and one year 10+w is no problem.