Scale Remediation in Producing Wells
Eight wells located in the Texas Panhandle producing out of the Morrow Upper and Albany Dolomite formations were experiencing reduced activity due to calcium carbonate and iron sulfide deposition. The conventional treatment program consisted of monthly batch treatments with scale corrosion inhibitors. In August 1993, several of the wells were acidized, which yielded minimal results (See production graph).
In July 1994, Bio Tech designed and implemented a microbial treatment program for the eight wells. The goals of the program were to bioremediate the calcium carbonate and iron sulfide deposits that were restricting production to colonize the wellbores with microbes that would inhibit the reformation of the deposits.
Bio Tech’s treatment program consisted of soaking the perforations with a combination of Litho-Bac™ and Corroso-Bac™ microbes for seven days, followed by monthly maintenance batch treatments.
The treatment program has been very successful. The wellbore deposits of calcium carbonate and iron sulfide were bioremediated. The oil, water and gas production has been stimulated (See production graph).
The monthly maintenance treatments are inhibiting reformation of scale deposits, and the operator realized incremental production of 5,235 barrels of oil and 67,227 MCF of gas.
