CO2 INJECTION PLANNING USING COMPOSITIONAL RESERVOIR SIMULATION: A REVIEW Dedi Kristanto, Hariyadi, Eko Widi P, Aditya Kurniawan, Unggul Setiadi N, Muhammad Iqbal Arizzqi Nuzli, Fadli Ramdhani
UPN Veteran Yogyakarta
Abstract
Reservoir simulation modeling is a technique used in reservoir engineering to accurately represent or replicate a reservoir in the form of a physical reservoir. Reservoir simulation modeling is categorized into three types depending on specific requirements: black oil reservoir simulation, compositional reservoir simulation, and thermal reservoir simulation.
This study employs compositional simulation to investigate the impact of liquid or gas composition on changes in PVP. Reservoir composition simulations are capable of describing a wide range of compositional situations that cannot be captured by black oil simulations. These conditions include reservoir fluid phase behavior, multi-contact miscibility, immiscible or near-miscible pressure, all of which are influenced by the composition of the reservoir. Composition is connected to phase characteristics such as viscosity, density during displacement, and the impact of Interfacial Tension (IFT) on the remaining oil saturation (Sor).
CO2 injection can be classified into two categories: immiscible flooding and miscible flooding. The CO2 injection mechanism involves several methods: continuous injection, carbonate water injection (also known as CO2 slug injection followed by water), simultaneous CO2 and water injection, and simultaneous and alternating CO2 injection. When CO2 gas is present, it dissolves the oil, causing a decrease in its density and viscosity. One benefit of utilizing CO2 injection is the ability to acquire CO2 gas from waste gas or reservoirs that contain CO2. Carbon dioxide (CO2) is considered environmentally benign and has a low propensity for explosion.
Keywords: compositional simulation, CO2 injection, simultaneous injection, alternating injection
