O&G Alway Highly Volatile Fortune does not come easily. If you are looking for steady income with less than 7% return yearly in longer term (5 to 10 years), I would go for banking stocks and don't touch any O&G stocks. A lot of O&G nvestors have already had 300% to 500% return in recent years. They usually have in-depth knowledge on the fundamentals of the targets and clear vision on the energy market. If you cannot sleep well at night, you should simply leave and don't look back.
Good luck.