Analysis of an interwell tracer test in a depleted heavy-oil reservoir

Journal Article · Tue Dec 01 04:00:00 EST 1987 · SPE (Society of Petroleum Engineers) Format. Eval.; (United States)

DOI:https://doi.org/10.2118/13672-PA· OSTI ID:5590930

Ohno, K; Nanba, T; Horne, R N

This paper presents field data and analyses of an interwell tracer test conducted in the Niitsu oil field, which is a fully depleted heavy-oil reservoir of unconsolidated sand formation. Water containing a chemical tracer was injected at a constant rate into an injector surrounded by three production wells. Effluent analyses showed very early breakthrough of injected water at two of the producing wells. The test results suggest a strong areal heterogeneity of the tested formation. An appropriate analytic model was used to obtain a preliminary interpretation of the results. A modified three-dimensional (3D) black-oil model developed to simulate th polymer flood process was then used for analyzing the data in more detail. The model treats tracer solution as a fourth component and can also account for adsorption of tracer. Simulation efforts were concentrated on matching the breakthrough times and tracer profiles after breakthrough. Through both the analytic and the simulation work, the reservoir is characterized by a highly heterogeneous distribution of horizontal permeability, a thin layer of high permeability, and a natural waterdrive that cause a preferential flow trend in a direction toward one producer. The authors conclude that the interwell tracer test is an effective tool for evaluating reservoir heterogeneities and a quantitative analysis of test data is done with the polymer option of a black-oil simulator.

• Research Organization: Japan Natl. Oil Corp.
• OSTI ID: 5590930
• Journal Information: SPE (Society of Petroleum Engineers) Format. Eval.; (United States), Journal Name: SPE (Society of Petroleum Engineers) Format. Eval.; (United States) Vol. 2:4; ISSN SFEVE
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
ASIA
DATA ANALYSIS
DISPLACEMENT FLUIDS
ENERGY SOURCES
FLOW MODELS
FLUID INJECTION
FLUIDS
FOSSIL FUELS
FUELS
HYDROGEN COMPOUNDS
ISOTOPE APPLICATIONS
JAPAN
MATHEMATICAL MODELS
OIL WELLS
OXYGEN COMPOUNDS
PERMEABILITY
PETROLEUM
POLYMERS
RESERVOIR ROCK
ROCKS
SANDSTONES
SEDIMENTARY ROCKS
TESTING
THREE-DIMENSIONAL CALCULATIONS
TRACER TECHNIQUES
VISCOSITY
WATER
WATERFLOODING
WELLS