System and method for fracturing rock in tight reservoirs

摘要

Methods and systems are provided for fracturing rock in a formation to enhance the production of fluids from the formation. In one exemplary method, one or more wells are drilled into a reservoir, wherein each well comprises a main wellbore with two or more lateral wellbores drilled out from the main wellbore. One or more explosive charges are placed within each of the two or more lateral wellbores, and the explosive charges are detonated to generate pressure pulses which at least partially fracture a rock between the two or more lateral wellbores. The detonations are timed such that one or more pressure pulses emanating from different lateral wellbores interact.

主权项

1. A system for explosive fracturing of a reservoir, comprising:
a squash head charge; a frame configured to orient the squash head charge towards a rock face in a wellbore in the reservoir; an internal electrical bus coupled to the squash head charge, wherein the internal electrical bus is configured to carry an ignition signal to a primer charge to detonate the squash head charge; a controller coupled to the internal electrical bus; and a cable connecting the controller to a surface through the wellbore, wherein the cable is configured to carry a signal to the controller to trigger the ignition signal.