History books and the Brunei Shell Petroleum page say that the Seria oil field was jointly discovered by F.F. Marriot (British Malayan Petroleum Company) and by T.G. Cochrane (Sarawak Oilfields Limited).
What are these two men's full names?
Here is a blog post from 2006 that identifies Cochrane as
Hon. Cochrane (later to become Lord Chochrane [sic] of Cults)
So it appears his full name was "Thomas George Frederick Cochrane, 2nd Baron Cochrane of Cults"
Sorry nothing on Mr. Marriot so far...
Edit: Here is another source, this one identifying TGC as "later Lord Cochrane"