Davis Polk & Wardwell and Holland & Knight have advised Latin American oil and gas firm GeoPark Limited on a $350 million issuance of notes to help finance the group’s expansion in a sector that promises much business for lawyers this year.

GeoPark plans to use the proceeds to finance its acquisition of Amerisur Resources Plc., a U.K. company with 13 production, development and exploration blocks in Colombia. That acquisition closed Jan. 16.