Effects of grid type and difference scheme on pattern steamflood simulation results

Conference · Wed Sep 01 04:00:00 EDT 1982 · Soc. Pet. Eng. AIME, Pap.; (United States)

OSTI ID:5453600

Coats, K H; Ramesh, A B

This paper presents 5-, 7-, and 9-spot pattern steamflood simulation results using parallel and diagonal grids and five-point and nine-point difference schemes. The effects of difference scheme and grid orientation are also examined in a two-dimensional (vertical) cross-section. Effects of different types of grid spacings in cyclic steam simulation are discussed. Sample problem data sets are roughly representative of a California deposit and a more viscous Alberta crude. Various 7-spot grids (neither parallel nor diagonal) and nonuniform 5(9)-spot grids pose unique challenges to both difference schemes, with interesting results. The conclusions emphasize superiority of the nine-point difference scheme and pitfalls of certain problems/grid/difference scheme combinations used in pattern steamflood simulation. The paper uses nine-point transmissibility alterations which allow rigorous use of 1/8 5(9)-spot patterns as opposed to 1/2 or 1/4 elements, with either parallel or diagonal grids. This is important because of significantly reduced cost compared with that of 1/4 or 1/2 pattern elements. Subject to certain conditions, the paper presents a simple procedure to calculate well productivity indices for uniform or nonuniform grids, cross-sections or any of the three patterns, and either of the two difference schemes.

• Research Organization: Intercomp Resource Dev. and Engr. Inc.
• OSTI ID: 5453600
• Report Number(s): CONF-820927-
• Conference Information: Journal Name: Soc. Pet. Eng. AIME, Pap.; (United States) Journal Volume: SPE11079
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
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COMPUTERIZED SIMULATION
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FEDERAL REGION IX
FINITE DIFFERENCE METHOD
FLUID INJECTION
GEOLOGIC DEPOSITS
ITERATIVE METHODS
MATHEMATICAL OPERATORS
MINERAL RESOURCES
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NUMERICAL SOLUTION
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PETROLEUM DEPOSITS
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WELLS