CJ, they have shown 105 as having gas and oil in most of their presentations so its not a result of recent logging/progress.
The hydrocarbon play nearest the Vietnam coast in block 105 is considered predominantly oil, but not at Cua-Lo.
Check this link for what NSAI had to say on the oil content at 105:
http://www.asx.com.au/asxpdf/20110509/pdf/41yjkm1jmtn3bx.pdf
