Noone has any real experience with plugging leaks at that depth, especially on such a fractured geological area inc BP and they are the most experienced oil co. for complex zones as far as Im know, as all the standard procedures either can't be used or wouldn't work, ie close it by explosion would fracture the entire area and cause hundreds of leaks. Plus the pressure will destroy the standard caps used fairly quicky as the flow is 3x that expected... The well was an exploratory well not a production well so its less robust which makes it even more of a challenge. So its a total mess. Normal