Oct 26 (Reuters) - Ecopetrol SA ECO.CN :
* To take over operation of rubiales field following conclusion of rubiales
risk participation and piriri jv contracts on June 30, 2016
* Says joint venture contracts were signed with metapetroleum, an affiliate of
pacific exploration & production corp
* Source text for Eikon urn:newsml:reuters.com:*:nPn8ZVR5M
* Further company coverage ECO.CN