METHOD AND APPARATUS FOR HYDRAULIC FRACTURING

摘要

A method of treating a consolidated formation having a wellbore therein. Tubing including a stress relieving tool is provided in the wellbore. An interval in the wellbore wherein the stress relieving tool is located is isolated. The stress relieving tool is actuated to apply mechanical force radially to an uncased inner diameter surface of the wellbore for providing a reduced stress zone of the formation. Fluid pressure is increased in the wellbore to fracture the formation within the reduced stress zone.

主权项

1. A method of treating a consolidated formation having a wellbore therein, the method comprising:
providing tubing in the wellbore, the tubing comprising a stress relieving tool; isolating an interval in the wellbore wherein the stress relieving tool is within the interval; actuating the stress relieving tool to apply mechanical force radially to an uncased surface of the wellbore, thereby non-sealingly engaging the surface for providing a reduced stress zone of the formation; and increasing fluid pressure in the wellbore to a fracturing pressure to fracture the formation within the reduced stress zone.