Nishikiori, Nobuo (Norske Shell A/S) | Sugai, Keiichiro (Arabian Oil Co. Ltd.) | Normann, Clas (Talisman Energy Norge AS) | Onstein, Arne (Talisman Energy Norge AS) | Melberg, Oddbjoern (DONG Norway) | Eilertsen, Terje (DONG Norway)
This study describes an improved engineering workflow to perform technical evaluation and screening of gas injection EOR. A successful case study demonstrates how field data, engineering analysis and simulation are integrated to precisely model gas injection EOR. This workflow can be adaptable for any type of reservoir and can be utilized as a fast-track screening workflow for gas injection EOR.
The target for this study was the Gyda reservoir located in the southern part of Norwegian North Sea in the Norwegian Continental Shelf. The reservoir is of heavily faulted heterogeneous shallow marine sandstone. As the measure of heterogeneity, a Dykstra-Parson's coefficient1 (VDP) of more than 0.8 has been measured from core plug data.
For the purpose of building a tool that can be utilized for gas injection EOR study, a five-step workflow has been implemented:
The results of this case study confirmed the capability of the described workflow to model gas injection EOR for the heterogeneous sandstone reservoir. Potential gas channeling in high permeability streaks and an improved displacement by gas was precisely modeled by the workflow. Injection strategies, such as WAG, SWAG and gas injection have been screened by the model, leading to a conclusion in relatively short period of time.
This paper presents how an engineered process of monitoring and data analysis can improve reservoir management. Engineers can gain a clear picture of reservoirs by adapting the described approach. This paper demonstrates how our integrated approach can improve reservoir management from a viewpoint of production data analysis. Awide variety of oilfield data have been utilized for experiment and verification of our approach.Five case studies highlight key elements in the integrated approach. Each of the application and highlights of the results includes:
The outlined approach and case studies have shown how the integrated process improves reservoir management in the life of field. The specific engineering methods described are all handy and they can be applicable for any type of oilfield.