The XujiaheFormationcan beregarded asacompletegasbearingcompartmentwith abnormally high pressure, in which pressure upgrading regime is caused by hydrocarbon generation.
Think about what this advancement has meant just in terms of access to the resources: When drilling into a hydrocarbonbearingformation 100 feet thick, vertical drilling would allow an operator to contact 100 feet of rock, which would limit your potential recovery to whatever oil or gas would flow into that length of pipe.