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For the size of data that oil exploration requires, tapes make lots of sense still.
They have higher density, and they are more shock proof. When you need to move masses of data round the world, writing it to tape, then sticking it on a plane is still the fastest way to move it (probably, may have changed I guess)
Yup, I 100% agree. Tapes are often viewed as obsolete, but there is no more cost-effective way storing data in the petabytes in a safer way than tape.
Hell, at work I have a few live storage clusters measured in petabytes, and being responsible for them can be pretty stressful at times. Data loss isn't just bad, it is fucking terrifying when its data costs hundreds of thousands of dollars per day to collect.
I have yet to experience data loss, but I breathe a sigh of relief for every batch of data that has been confirmed written to tape. Because once it is, I know that it is safe and no longer my responsibility.
It's written to two sets of tape at a time, both of which are read back to confirm data integrity, and once it is, that's when I know that my live copy is officially not supposed to be a backup.
One set of tapes is stored on board in case something stupid happens with the other set during transport to a literal mountain for storage. There it is re-read and checksummed, confirming that the other set of tapes can be rewritten with the next dataset. (Yes, every tape cartridge is written to twice).