I trade equities and am somewhat familiar with this stock and how it has traded in the past... But I don't have a crystal ball or claim to know what's going on with SD.
If you look at a lot of the small to mid-size oil & gas stocks right now, they are trading similar to how some of the smaller regional banks and lenders traded in 2008. Once the price of the common goes below about $2, the prospects for a turnaround in the equity is pretty bleak. Some will likely go BK, while some might be acquired by larger companies with stable balance sheets... I do know they have a ton of debt... Anyone's guess what the future holds for them. I remember seeing Ford Motor (F) at $2 thinking it had to worthless, GM was filing BK...
Have you considered selling your position to realize the loss and buying the stock back 30 days later if you REALLY do want to own SD? Just an idea.
There will be a good buying opportunity in oil & gas stocks eventually... Just not sure when. And not to be a dick, but right now you're down ~ 63% in the position. In the future, have a plan in place if you are picking individual stocks, to prevent you from sitting in a stock down this much...