Enhanced Oil Recovery
Waterflood MEOR Case study
The Pardue Canyon Sand Unit located in Fisher County, Texas consists of 14 producers and 14 injectors. The system has a history of oil-coated iron sulfide and calcium carbonate plugging in the injections system. The conventional treatment program consisted of continuous injection of scale and corrosion inhibiting chemicals at the central injection facility. The injection wells required regular acid treatments and flowline leaks were a common occurrence.
Bio Tech designed and implemented a treatment program which consisted of bi-monthly batch treatments in the holding tanks using 3 cultures: Para-BacS, Corros-Bac and Litho-Bac. The goals of this treatment program were to:
1.) Control iron sulfide and calcium carbonate deposition in the
injection system.
2.) Reduce or eliminate chemical and acid treatments.
3.) Improve water quality and injectivity.
4.) Enhance oil recovery.
The treatment program has been very successful. Bio Tech’s treatments eliminated the need for chemical and acid treatments. The program has improved the injectivity of the waterflood (See Hall Plot). The occurrence of flowline leaks has been greatly reduced. The unit has experienced a production increase, solely attributable to the microbial treatments (See production Graph).
This pilot project demonstrates that this technology can improve injection water quality, improve injectivity and reduce the reservoir residual oil saturation.