Title: Five ways to boost injectivity of waterflood input wells
Abstract: Operators in Wilmington field, California, are successfully using 5 basic methods to boost performance of water injection wells completed in sand reservoirs. Treatments used are steam injection; backflow by pumping, swabbing, dry DST or nitrogen cushion; high rate-pressure water injection; acidizing; and chemical washing, chiefly with surfactants. Based on recent experience, steam injection--although relatively expensive at an average cost of $8,000 per job--has been especially effective in treating in-zone injectors with residual oil saturation and in which wax accumulations, etc., occur. High-rate pressure injection has been most effective on wells completed in aquifers, where oil saturation is not present to adversely affect relative permeability to water. A description is given of all techniques used and an evaluation is made of results achieved. The average cost data are included.
Publication Year: 1969
Publication Date: 1969-02-01
Language: en
Type: article
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