Despite the drop in deal activity this year, several Am Law 100 firms are gaining more M&A work through big oil deals announced this month. And dealmakers expect to see even more energy industry consolidation in the future.

In a deal announced Monday, Chevron turned to Paul, Weiss, Rifkind, Wharton & Garrison on its $53 billion buy of Hess Corporation, which was guided by Wachtell, Lipton, Rosen & Katz.