| Popis: |
Finding an environmentally innovative yet a commercially viable solution to meet the growing energy demands is becoming more challenging with time. CO2-EOR forms an integral part of ADNOC's de-carbonization strategy and in view of its reported advantages, a series of CO2 pilot and projects were implemented. Based on the gained experiences, a business case was generated to convert a field from HC-WAG to CO2-WAG; looking for win-win situation for the environment and HC extraction. The currently implemented development plan relies heavily on HC-WAG injection and has been facing several challenges including, maintaining miscibility conditions and UTC optimization efforts by gas curtailment. In this study, subsurface and surface assessment of alternative field development scenarios was conducted; aiming to convert the field to CO2-WAG. The study was initiated by evaluation of reservoir performance to identify areas for improvement and accelerate the decision making process. This was later incorporated into a dynamic model via diverse set of field management logics to screen wide range of scenarios. The simulation results were analyzed using standardized approaches where a number of key indicators was cross-referenced to produce optimal field development scenarios with regards to CO2-EOR effect on the reservoir, understanding CO2 efficiency post HC flooding, miscibility conditions, balanced pressure depletion, harmonized sweep as well as robust reservoir engineering ground. The optimal scenarios were assessed with in-house engineering, in line of having strong economic indicators, honoring operational constraints, corporate business plan and strategic objectives. The study is unique and one of very few cases available in literature to highlight shifting field development with an established history of HC-WAG injection to CO2-WAG. The methodology applied in this study uses an integrated subsurface-surface structured approach to tackle reservoirs challenges related to CO2 Conversion, generate alternative option to showcase the benefits of CO2-EOR as an environmentally friendly solution. |
