Numerical simulation of phase segregation in the primary porosity (matrix blocks) in two-porosity porous media

Conference · Tue Nov 01 04:00:00 EST 1983 · Soc. Pet. Eng. AIME, Pap.; (United States)

OSTI ID:5292699

Gilman, J R

An efficient finite-difference method is presented for simulating unsteady-state multiphase flow in the matrix blocks (primary porosity) of naturally fractured systems or other reservoirs which have two different porosities. The scheme obtains pressure and saturation distributions in the matrix blocks (rather than average values) by dividing the matrix into sub-domains. The method is an extension of the double-porosity concept in which fractures are the continuum for fluid flow and the matrix rock is the primary storage medium which acts as a source term to the fractures. The fracture medium is the major flow path to the wellbore with the matrix sub-domains as source terms. The matrix sub-domains can be connected to each other or to the fractures in any way desired to conform to the physics of the reservoir. This approach lends itself to an efficient scheme for reducing the system of flow equations to the same structure as conventional single-porosity simulators. The method is presented for a fully implicit, one-dimensional two-phase (oilwater) simulator, but it can readily be extended to multi-phase, multidimensional systems as well as to problems involving heat flow or chemical transport.

• Research Organization: Marathon Oil Co.
• OSTI ID: 5292699
• Report Number(s): CONF-831190-
• Conference Information: Journal Name: Soc. Pet. Eng. AIME, Pap.; (United States) Journal Volume: SPE 11271
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
ENERGY TRANSFER
ENGINEERING
FINITE DIFFERENCE METHOD
FLOW MODELS
FLUID FLOW
FLUIDS
FRACTURED RESERVOIRS
HEAT TRANSFER
ITERATIVE METHODS
MATERIALS
MATHEMATICAL MODELS
MULTIPHASE FLOW
NUMERICAL SOLUTION
POROSITY
POROUS MATERIALS
RESERVOIR ENGINEERING
RESERVOIR FLUIDS
RESERVOIR ROCK
SIMULATION