Cartels are designed to limit the supply of a product thereby optimizing the price of the product that they sell. However, the OPEC Cartel has no control as to the price of oil since they are producing at 95% of capacity and demand keeps increasing.
Yes, OPEC is Dead but only dead in the sense that they can do noting to increase or decrease the price of oil. Thus, the only way to decrease the price is to decrease consumption.