'We've got working oil pumps, but the yield will never be what we need if we don't know where the best wells are. Thankfully we have plans for a new Scanner mod, able to pinpoint any nearby concentrations of nanites. Get us these items and we'll get one made as soon as we can. '
You may be able to stumble upon a good oil well by chance, but the ICA can't depend on just dumb luck alone if they want this project to succeed. A new mod for your Scanner will ensure you always know where to call down Oil Pumps.