FRACTURING WHILE TRIPPING

摘要

A drill string includes drill pipe and a modular fracturing sub. A processor can control the drill string to drill a wellbore to some desired depth. The drill string is positioned at a desired location in the wellbore and a section of the wellbore is hydraulically isolated, forming a cavity. Existing fluid may be evacuated from the cavity and fracturing fluid injected into the cavity until a desired level of fracturing is attained. Retrievable packers are used for the hydraulic isolation. A pump evacuates the existing fluid via ports in the fracturing sub. The ports may also be used when injecting fracturing fluid. Seismic sensors may be distributed along the drill string to monitor fracture growth. Logging-while-drilling tools may be integrated into the drill string. Fluid from the lower portion of the wellbore is blocked by a lower sealing unit on a bottomhole assembly.

主权项

1. A method, comprising:
providing a drill string comprising drill pipe and a fracturing sub; drilling a wellbore to a desired depth using the drill string; positioning the drill string at a desired location in the wellbore; hydraulically isolating a section of the wellbore and forming a cavity between the drill string and the wall of the isolated section of the wellbore using the fracturing sub; and injecting fluid into the cavity until a desired pressure within the cavity is attained.