Mansarovar, a joint venture between Indian NOC ONGC and Chinese NOC Sinopec, is the operator of the Nare Association Contract and the Velásquez Guaguaquí-Teran contract. The Nare Association Contract encompasses six fields: Abarco, Chicala, Girasol, Jazmín, Moriche, Nare Sur and Underriver. The Velásquez field is private property. The contract has no expiry date and does not revert back to Ecopetrol. This is the only contract of its type in Colombia.