PetroChina Company Limited
Fracturing Process

Abstract:

The present invention provides a fracturing process, which comprises the following steps of: injecting a fracturing fluid into the formation to cause fractures in the formation and stopping the injection of the fracturing fluid after the fracture as produced reaches a preset requirement; injecting a phase transition material fluid capable of undergoing a phase transition reaction at a preset temperature and a delayed heat generating agent into the formation, wherein the delayed heat generating agent functions to generate heat after the injection of the phase transition material fluid is substantially completed, so as to cause a phase transition of the phase transition material fluid to complete the fracturing. The technical solution provided by the present invention can effectively reduce the friction resistance of the pipe string; moreover, the use of a delayed heat generating agent can effectively control the initiation and progress of the phase transition reaction.