"I need a Schedule E for each company"

Company they run, or company that pays them?

Did your taxpayer get multiple 1099-Misc? Do they have lease (rent) payments, working interest, royalties, overriding royalties? More than one property or property type?

If you are completely new to this, I found a nice starter article:

https://accountants.intuit.com/taxprocenter/tax-law-and-news/basic-tax-reporting-of-oil-and-gas-rela...