Modified Sequential Fully Implicit Scheme for Compositional Flow Simulation

Add to your list(s) Download to your calendar using vCal

• Arthur Moncorge, TOTAL
• Thursday 12 November 2015, 11:30-12:30
• Open Plan Area, BP Institute, Madingley Rise CB3 0EZ.

If you have a question about this talk, please contact Catherine Pearson.

The Fully Implicit Method (FIM) is widely employed for general-purpose reservoir simulation. However, in the Multi-Scale Finite-Volume (MSFV) approach, sequential strategies are used to couple flow (pressures and velocities) and transport (saturations/compositions), that is, either Implicit Pressure Explicit Saturation (IMPES) or Sequential Fully Implicit (SFI) integration schemes. For problems with tightly coupled nonlinear interactions between flow and transport in multiphase, multi-component systems, the SFI approach may require many more Newton iterations, and/or smaller time steps compared with FIM .

We analyzed the nonlinear coupling between flow and transport for multiphase, multi-component systems that involve significant compressibility effects and interphase mass transfer. Therefore we isolated the nonlinear effects related to transmissibility and compressibility from those due to interphase mass transfer. It could be demonstrated that when the convergence rate of the FIM is far superior to that of SFI integration, there exist large differences between the spectra of the SFI and FIM operators. Based on these findings we propose a modified SFI scheme, that is, the SFIM method, whereby the SFI operator is complemented with a local approximation of the pressure-saturation coupling terms. We show across a wide parameter range that this SFIM algorithm has convergence properties that are close to those of FIM and consistently better than those of SFI . Black-oil and compositional systems in depletion and compression settings are presented and discussed.

This talk is part of the Institute for Energy and Environmental Flows (IEEF) series.

This talk is included in these lists:

• All Talks (aka the CURE list)
• Cambridge Energy Seminars
• Department of Earth Sciences seminars
• Institute for Energy and Environmental Flows (IEEF)
• NanoDTC Energy Materials Talks
• Open Plan Area, BP Institute, Madingley Rise CB3 0EZ
• history
• ps635

Note that ex-directory lists are not shown.