| Popis: |
Management of a robust completion approach, utilizing state-of-the-art technologies, has been successfully used to stimulate multiple pay tight gas sand intervals in an environmentally sensitive area near Kenai, Alaska. Management of several unique completion techniques has demonstrated exceptional effectiveness. Previous stimulation attempts were not successful in developing the Beluga sand resource to an economic level; therefore, a comprehensive study of all processes by reservoir, drilling, completion, and service company engineers was initiated to determine the best techniques to improve recovery and financial delivery. Engineering and laboratory studies were conducted to develop a complete understanding of the Beluga sandstone reservoir composition; mechanical and chemical properties were analyzed after which an extensive project was undertaken to develop a fit-for-purpose stimulation fluid. For the well completions, a novel Casing Conveyed Perforating System (CCPS), which has revolutionized multi-zone fracturing operations, was utilized. The CCPS facilitates pinpoint stimulation of multiple pay intervals in a relatively short period of time and also improves stimulation quality, hydrocarbon recovery and life-of-well economics. Recycling of the hydrocarbon-based stimulation fluid provided an additional project enhancement. The recycling process provides a stimulation fluid with excellent rheological properties. Management of the fluid recycling process also reduces the total volume of base hydrocarbon transported and stored in environmentally sensitive areas like those in Alaska. Recycling also minimizes the equipment footprint and minimizes overall completion cost. Wells completed using these unique reservoir evaluations, CCPS, and stimulation fluid recycling techniques have been considered technical and economic successes. |
