Experience with pumping well testing
- Schlumberger Well Services (US)
This paper presents our recent experiences with pumping well testing using the acoustic method. Three areas of testing are examined: computation of changing liquid density throughout the liquid column at every timestep, interpretation of the test with simultaneous downhole pressure and flow-rate data, and static and dynamic responses of the acoustic device. An algorithm is developed to incorporate the gas/oil mass transfer effect (solubility ) so that accurate gas velocity and, in turn, improved liquid density in the annulus can be computed. The effect of gas solubility is to reduce gas volume and hence the total bottomhole flow rate (BHF) without affecting bottomhole pressure (BHP) significantly. Transient interpretation improves when the gas solubility is taken into account. This study reviews some commonly used wellbore two-phase correlations. The Godbey-Dimon model is modified to simulate the moving liquid column during a buildup test. Field examples are used to examine both the static (accuracy) and dynamic (resolution) responses of the acoustic device. The literature suggests that the acoustic method can faithfully reproduce the absolute static gauge BHP. This study shows that the results from dynamic (buildup) tests compare very favorably with those from downhole measurements.
- OSTI ID:
- 5873993
- Journal Information:
- SPE (Society of Petroleum Engineers) Production Engineering; (United States), Journal Name: SPE (Society of Petroleum Engineers) Production Engineering; (United States) Vol. 6:1; ISSN SPENE; ISSN 0885-9221
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
ACOUSTIC TESTING
DENSITY
ENERGY SOURCES
FLOW RATE
FLUID FLOW
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
GAS FUELS
GASES
MASS TRANSFER
MATERIALS TESTING
MWD SYSTEMS
NATURAL GAS
NONDESTRUCTIVE TESTING
OIL WELLS
PETROLEUM
PHYSICAL PROPERTIES
PUMPING
RESERVOIR FLUIDS
RESERVOIR PRESSURE
SOLUBILITY
TESTING
TWO-PHASE FLOW
VELOCITY
WELLS