It was a pretty quiet week in the energy sector, as first-quarter earnings have drawn to a close. However, that didn't stop three companies, SandRidge Energy (NYSE: SD), Williams Partners LP (NYSE: WPZ), and Rosetta Resources (NASDAQ: ROSE), from making moves of 20%, or more, during the week.

Two of the three stocks making big moves this week did so because they agreed to a merger deal. To learn more about those deals, as well as what drove this week's other big energy movers, check out the slideshow below.