Oil companies still have room to continue rising and continue the trend that began at the end of October last year. After they reached a peak as of March, they have been on hiatus, but this, from my perspective, will not last long and we will see a continuation of the trend soon.
Likewise, I see it likely that oil prices will continue to rise in the following months until they reach at least $100 per barrel.
The oil companies with the lowest prices tend to rise the most, although a good way to capitalize on the trend would be to go for a leveraged ETF for the entire sector, such as GUSH.