METHOD FOR IMPROVING THE INJECTIVITY OF WATER INJECTION WELLS

摘要

The injection rate of water into an injection well that exhibits low injectivity because of oil saturation in the formation adjacent to the well can be increased by alternately introducing into the well a series of successive small quantities of substantially anhydrous soluble oil and low salt-content water, and thereafter injecting flood water through the well and into the formation. This technique is particularly useful for improving the injectivity of wells penetrating relatively thick and/or heterogeneous formations.