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STIMULATION Family Brand Systems, Services, Suite Names (if any) Acid-on-the-Fly (AOF) Blending System HAL30504 Real-time Blending Helps Optimize Acid Treatments and Improve Environmental Performance Halliburton’s acid-on-the-fly (AOF) blending system provides significant improvements in several aspects of the acidizing process: • Enables real-time, on-the-fly adjustments to the acid blend. • Delivers a precisely controlled acid blend downhole. • Enables taking a blended sample for testing and verification anytime during the treatment. • Eliminates disposal issues since acid is blended only as it is used. • Unused acid components can be recycled for another treatment. • Improves personnel safety. e ability to modify the treatment at any time can provide important advantages. For example, if a problem arises due to hydrofluoric acid creating unexpected damage, the treatment can be stopped or the acid blend quickly changed to hydrochloric acid with no wasted material. For fail-safe performance, the computer and electrical system are backed up by manual controls. HAL30508 Advanced Equipment Engineering Provides Improved Performance e AOF system provides excellent quality control through computer-based monitoring to help insure that the designed acid blend is delivered downhole. e new AOF blending system can blend three base solutions and up to seven liquid additives simultaneously into a pressurized line while maintaining the desired mix ratio. STIMULATION Improved Safety and Environmental Performance At the conclusion of the treatment, any excess acid components can be handled very efficiently. e acid supplier simply returns the remaining material to the supplier’s facility. A sampling valve incorporated in the discharge line allows the operator to safely and quickly obtain a downstream sample anytime during the delivery process During the entire treatment, an automated alarm system enables immediate job shutdown for improved personnel safety. Also, the acid-blend sampling system has been engineered to limit the exposure to the operator and to the environment. In addition, the diesel engine is California Air Resources Board approved and meets all California emission regulations. HAL30507 e system reduces the treatment site footprint by eliminating the need for 10 or more 6,000-gal poly tanks on location to contain preblended acid. One tank for each corrosive agent will replace the preblended acid tanks. Improved Chemistry Performance e AOF system eliminates concerns about the life of the corrosion inhibitors. In the conventional approach, preblended acid may sit on location for several days. With the AOF system, all liquid additives remain in concentrated form until delivered to the downhole pump. HAL30506 e AOF system is designed so that it can be used with StimWatch® monitoring service and/or Guidon AGS™ acid guidance system to enable real-time monitoring and adjustment of the treatment for genuinely optimized acidizing results. HAL30505 Each additive tank is equipped with an eye wash, spray station and a low level /high level alarm system. e AOF blender is DOT and OSHA compliant. For more information about how the new AOF acid-on-the-fly real-time blending system can help improve your acidizing treatment results, contact your local Halliburton representative or email [email protected]. A proprietary reference meter system replaces the standard “buckettest” method, limiting the exposure of operators and the environment while verifying the accuracy of the liquid additive delivery system. © 2009 Halliburton. All rights reserved. Sales of Halliburton products and services will be in accord solely with the terms and conditions contained in the contract between Halliburton and the customer that is applicable to the sale. H06812 4/09 www.halliburton.com