Hold on to your hats

So Juba has decided to stop oil production in South Sudan, in protest of Khartoum theft. Pre-independence, revenues from the South were split 50:50, and Khartoum have basically been trying to continue that by imposing arbitrary fees, asking for up to $30 per barrel (Juba claims that normal prices for pipeline transit fees in other countries are around $1 per barrel).

So now we have a war of attrition. Which side can afford to last out the longest before making a compromise? Who has the largest cash reserves relative to their recurrent spending demands? (...)