ApplicationNo. 563765 filed on 08/06/1990
US Classes:166/281, Separate steps of (1) cementing, plugging or consolidating and (2) fracturing or attacking formation166/269, Fluid injected from longitudinally spaced locations in injection well166/292, Using specific materials166/300, Chemical inter-reaction of two or more introduced materials (e.g., selective plugging or surfactant)166/308.1Fracturing (EPO)
ExaminersPrimary: Suchfield, George A.
Attorney, Agent or Firm
International ClassesE21B 033/138
AbstractThe present invention relates to a method of hydraulically fracturing a first zone with a first fluid and an adjacent second zone with a second fluid which preferably is chemically reactive with the first fluid to produce a precipitate or gel upon contact therewith. Preferably the fluids are separated from one another in the wellbore and are pumped into their respective zones at approximately the same rate so that they spread radially outward from the wellbore into the formation. Upon contact, the two fluids react with one another to form a precipitate or gel at the interface between the two zones thereby arresting further fracture propagation between the zones.
Field of SearchFluid injected from longitudinally spaced locations in injection well
Injecting a composition to adjust the permeability (e.g., selective plugging)
Including fracturing or attacking formation
Separate steps of (1) cementing, plugging or consolidating and (2) fracturing or attacking formation
Using specific materials
Chemical inter-reaction of two or more introduced materials (e.g., selective plugging or surfactant)