Oil Stock Opinions Please, page-5

To answer your question.

Out of those two I would be buying WPL if I were you.
They are cashed up and in the best position to weather the crisis.
OSH raised some funds recently, but if this situation drags on they will need to raise more.
WPL just need to make a decision on when to start spending again - on new projects or acquisitions.

In my opinion, and that is all it is, the market will retest March lows at some point.
So you may want to DCA your $20k rather than buying all in one go.