Hi, i have a few questions about the rules:
1) Action D.3.2: Players trasport oil in turn order and beginning with the active player. If the player with the the 2 sequence chip is the active one, the next player to transport oil will be the one with the ! sequence chip or the one with the 3 sequence chip?
It's clockwise around the table. Only the last turn are the sequence chips used. In that case, they go in sequential order.
2) The action that allows the player to spend 4 victory points to replace all the area cards can be executed 2 times in a row?
It's only limited in that you may never go negative in points.
4) Action D.3.2: Can oil barrels go through any number of areas?
Exemple: If the are all trains needed, can oil barrels be trasnferred from vladivostok to porto?
Mostly, yes. However, once oil is loaded onto a tanker ship, it may no longer use any railroads. But up until that point, if there is a line of consecutive railroads, you may transport as far as they reach (paying a share to each rail owner used).