Bots do not know how to find oil derricks when 'Megawealth' option is enabled.

[ght0203]

I suspect that bots will only capture oil derricks on explored/visible areas. The purple bot immediately captured the two derricks which are visible within their starting point:

The red bot's engineer had to capture a derrick that is near the enemy's base when they could have just captured the ones near the starting area (not visible from their starting point).