流路として機能しない空隙を導入した貯留層シミュレーションモデルによる 圧力・トレーサー濃度変化の理論的検討

Translated title of the contribution: A theoretical study on changes in pressure and tracer concentrations taking into account pores containing immobile fluids in reservoir simulations

Research output: Contribution to journalArticle

Abstract

The conventional reservoir simulation model has been extended. This extension is based on an assumption that the highly heterogeneous distribution of pores in reservoirs generates pores containing immobile fluids. The pores containing immobile fluids only allow the propagation of pressure change. The specific enthalpy and tracer concentrations in these pores are maintained at the initial values. Attaching the pores containing immobile fluids on the outside of the porous medium defined in the conventional model, we assume that the total pore volume increases by a factor of α . The changes in tracer concentrations are controlled by the porosity of the original porous medium ϕ, whereas that in pressure is controlled by α ϕ . Numerical experiments validate these dependencies of pressure and tracer concentrations. An effective procedure for matching the extended simulation model to field observations is discussed in terms of the abovementioned dependencies. A further extension is described by taking into account the thermal decay of multiple tracers.

Original languageJapanese
Pages (from-to)129-144
Number of pages16
Journaljournal of the geothermal research society of japan
Volume40
Issue number2
DOIs
Publication statusPublished - Jan 1 2018
Externally publishedYes

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theoretical study
tracers
tracer
porosity
fluid
fluids
simulation
porous medium
enthalpy
experiment
propagation
decay

All Science Journal Classification (ASJC) codes

  • Geophysics

Cite this

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title = "流路として機能しない空隙を導入した貯留層シミュレーションモデルによる 圧力・トレーサー濃度変化の理論的検討",
abstract = "The conventional reservoir simulation model has been extended. This extension is based on an assumption that the highly heterogeneous distribution of pores in reservoirs generates pores containing immobile fluids. The pores containing immobile fluids only allow the propagation of pressure change. The specific enthalpy and tracer concentrations in these pores are maintained at the initial values. Attaching the pores containing immobile fluids on the outside of the porous medium defined in the conventional model, we assume that the total pore volume increases by a factor of α . The changes in tracer concentrations are controlled by the porosity of the original porous medium ϕ, whereas that in pressure is controlled by α ϕ . Numerical experiments validate these dependencies of pressure and tracer concentrations. An effective procedure for matching the extended simulation model to field observations is discussed in terms of the abovementioned dependencies. A further extension is described by taking into account the thermal decay of multiple tracers.",
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AU - Matsumoto, Mitsuo

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AB - The conventional reservoir simulation model has been extended. This extension is based on an assumption that the highly heterogeneous distribution of pores in reservoirs generates pores containing immobile fluids. The pores containing immobile fluids only allow the propagation of pressure change. The specific enthalpy and tracer concentrations in these pores are maintained at the initial values. Attaching the pores containing immobile fluids on the outside of the porous medium defined in the conventional model, we assume that the total pore volume increases by a factor of α . The changes in tracer concentrations are controlled by the porosity of the original porous medium ϕ, whereas that in pressure is controlled by α ϕ . Numerical experiments validate these dependencies of pressure and tracer concentrations. An effective procedure for matching the extended simulation model to field observations is discussed in terms of the abovementioned dependencies. A further extension is described by taking into account the thermal decay of multiple tracers.

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