| | 2017 | | 2016 | | 2015 | | ||||||||||||
| | Sales and services | | Purchases and others | | Sales and services | | Purchases and others | | Sales and services | | Purchases and others | | ||||||
Joint Ventures | | | | | | | | | | | | | | | | | | | |
Equion Energy Limited | | | 425,881 | | | 598,636 | | | 491,698 | | | 418,618 | | | 515,968 | | | 190,158 | |
Ecodiesel Colombia SA | | | 6,583 | | | 259,269 | | | 5,744 | | | 265,584 | | | 7,245 | | | 267,647 | |
Offshore International Group | | | 15,188 | | | - | | | 6,285 | | | - | | | - | | | - | |
Associates | | | | | | | | | | | | | | | | | | | |
Serviport SA | | | - | | | - | | | - | | | 24,572 | | | - | | | - | |
Total | | | 447,652 | | | 857,905 | | | 503,727 | | | 708,774 | | | 523,213 | | | 457,805 | |