Hi @Isentropic, in my opinion, if you are talking about VISA 189/190, I suggest that you look first in CSOL or SOL. See what ME profession that is far from its ceiling quota for you to get surely invited on the date you planned to apply. Also look in the internet for those in-demand ME professions now until some future extent.
What I'm trying to say is that you try to build your strength in an engineering field that is flexible and be an expert with it. Do not focus specifically on Oil and Gas only. Building Construction is also a good/in-demand field.
By knowing the basic requirements to get the point requirements, you will have a better chance of being invited. Strategize how you will get 65 points or above. Because it seems like you are very young and fresh engineer with 1 year exp. it will be hard for you to obtain such points as of now. You may try increasing your points through IELTS.
But like they say, there are many ways to skin a cat. You can try Student visa and other visa streams to live in Au. All the best for you. APir!!!