from the increase in pressure? >> as long as they're careful. that's why they do it slowly so they don't increase the pressure. if it doesn't inject and pressure just keeps building, they're not going to be able to do this static kill. that's what they're checking to see if they can actually do it. >> at the same time they go ahead with this static kill operation if the injectivity test indicates they can in fact force that oilack down into the reservoir, they're going ahead with the relief well operation. bp says some time between the 11th and the 15th they should have that relief well completed. many people might be saying, you've got the relief well that's almost finished, why are you even talking about this static kill operation? >> one reason they want to do the static kill is to make sure they can get control of the pressure early on. it would be convenient to have that pressure under control before they penetrate it. it is not absolutely necessary, but they will have the well pressure under control if it works well ahead of the schedule of the relief well. that's a good thing, because