Integrated Static/Dynamic Modeling of Reservoir Stack Helps to Resolve History Match Challenge and Identify New Drill Opportunities

Abstract

Simulation studies are often conducted on single-reservoir levels even though hydrocarbon accumulations hardly occur in isolation. However, it is sometimes beneficial to conduct studies on multiple reservoirs to evaluate opportunities in the sequence simultaneously. This can help to optimize the development plan by enabling the combination of opportunities with multiple strings and providing an avenue to evaluate interactions among reservoirs. Where these interactions exist, they can be critical parameters in the simulation history matching process1. This approach was used in the simulation studies of five reservoirs across two fields (Field_A & Field_B). Collaboration among an interdisciplinary team helped to overcome challenges in the history matching process, especially regarding a recent observation that one reservoir was exhibiting an increasing reservoir pressure while on production with no water injection. The learnings/insights from the study were used to improve field management of reservoirs with water injection, optimize base production, and identify five development opportunities with a proposed incremental recovery of 15 MMBO.