METHOD TO INCREASE GRAVITY DRAINAGE RATE IN OIL-WET/MIXED-WET FRACTURED RESERVOIR

摘要

The present invention provides a method for treating a fractured oil-wet/mixed-wet subterranean formation with a wettability altering agent by forming a fluid comprising a wettability altering agent; introducing the fluid into the fractures of a subterranean formation; and modifying the wettability of the formation near the fracture surface, wherein the wettability modification results in oil flowing within a fracture instead of reimbibing.