M.S. JuprasertChevron U.S.A. Production Co.Bakersfield, Calif. High acid injection rates, within the friction dominant region, proved successful in stimulating oil wells completed in a naturally fractured reservoir. The bullhead technique was effective without any chemical or mechanical diversion. Chevron U.S.A. Production Co.'s Santa Clara field produces through wells on Platform Grace, in 318 ft of water. The field is on OCS Parcel 0217 Santa Barbara channel, about 12 miles offshore Ventura, Calif. Production comes from the Monterey formation, a naturally fractured reservoir containing chert, porcelanit...

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