A method of improving oil recovery includes the step of selecting an oil containing rock formation having geologic structures and well completions with vertical permeability that allow a structurally high water injection point. The solenoid control valve has an electronically operated solenoid with armature and actuator rod displaced through a channel in the solenoid. The microchip usable in the precision aerosol dispenser of the invention is a multilayer device fabricated using MEMS fabrication techniques. The strainer is ideally made from an inexpensive, disposable material suitable for limited use and then discarded. A vertically extending C-spring is formed in the rails adjacent the microactuators in order to allow the microactuators to expand and contract. A wave front compensation device is designed for this invention.