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Well testing and analysis techniques for layered reservoirs

Journal Article · · SPE (Society of Petroleum Engineers) Format. Eval.; (United States)
DOI:https://doi.org/10.2118/13081-PA· OSTI ID:5213324
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This paper presents new testing and analysis techniques to obtain individual-layer permeabilities and skin factors for layered reservoirs. The new multilayer testing techniques consists of a number of sequential flow tests with a production logging tool that simultaneously measures the wellbore pressure and flow rate at the top of each layer. Two different analysis techniques are presented to estimate layer parameters. The first technique, which is the logarithmic convolution method, estimates the approximate values of parameters. The second technique, which is the nonlinear least-squares estimation method, improves the first estimates. It is shown that layer permeabilities and skin factors can be estimated uniquely from simultaneously measured wellbore pressure and flow-rate data that are acquired from all layers sequentially. It is also shown that these individual-layer parameters cannot be estimated from the conventional drawdown- or buildup-test wellbore pressure data. Several synthetic examples are presented to illustrate the application of multilayer testing and analysis techniques.

Research Organization:
Schlumberger Well Services, Houston, TX
OSTI ID:
5213324
Journal Information:
SPE (Society of Petroleum Engineers) Format. Eval.; (United States), Journal Name: SPE (Society of Petroleum Engineers) Format. Eval.; (United States) Vol. 1:4; ISSN SFEVE
Country of Publication:
United States
Language:
English

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Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
440400 -- Well Logging Instrumentation
47 OTHER INSTRUMENTATION
DATA ANALYSIS
DRAWDOWN
EQUIPMENT
FLOW RATE
FLOWMETERS
FORMATION DAMAGE
FRACTURED RESERVOIRS
GEOLOGIC DEPOSITS
LAYERS
LEAST SQUARE FIT
MAXIMUM-LIKELIHOOD FIT
MEASURING INSTRUMENTS
METERS
MINERAL RESOURCES
NATURAL GAS DEPOSITS
NATURAL GAS WELLS
NONLINEAR PROBLEMS
NUMERICAL SOLUTION
OIL WELLS
PERMEABILITY
PETROLEUM DEPOSITS
PRESSURE GAGES
PRESSURIZING
PRODUCTION LOGGING
RESERVOIR PRESSURE
RESOURCES
TESTING
WELL LOGGING
WELL LOGGING EQUIPMENT
WELL PRESSURE
WELLS