From: the Netherlands
Bombing oil and refineries will hurt as well. As soon as Japan has captured bases with oil fields, send the B-17s and whatever else is in range at 6000 feet. Chances are good that the Japanese invasion forces do not contain much AA, base forces and fighter units for CAP. Early in the war there are not enough Japanese fighters around to cover both invasion TFs and bases. Even if - Nates, Oscars and even Zeros have little effect against heavies. Also think of a carrier raid on Palembang before air defense is in place (and if KB is not around).
To be honest I make it a point not bombing refinery and oil supply with heavy bombers in 1942. It is to easy to station a few squadrons at Java and just bomb the crap out of Palembang and Balikpapan.
I have heavy bombers in the area but I use them to supress the use of ports and airfields in the area. Sank quite a few ships this way...
"It happened, therefore it can happen again: this is the core of what we have to say. It can happen, and it can happen everywhere.”
¯ Primo Levi, writer, holocaust survivo