Rate normalization of buildup pressure using afterflow data

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

OSTI ID:5876917

Fetkovich, M J; Vienot, M E

Field data indicates that, in some instances, significant afterflow occurs after a well is considered shut-in. An analysis method for afterflow dominated pressure buildup data is presented whereby the correct analytic model describing the transient behavior of the well can be obtained directly by matching a log-log plot of the rate normalized pressure vs. time data to published type curves. Thus, the PD-tD obtained allows a rigorous mathematic superposition analysis to be performed on the same data with results equivalent to those obtained from the normalized type-curve analysis. This work demonstrates that rate normalization must be based on total afterflow rates, confirming with field data Perrine's assumption that total rate should be used in multiphase flow analyses. Dramatic changes in character are seen between the rate normalized pressure vs. time and the conventional pressure vs. time log-log data plots for low permeability stimulated wells. Several field examples demonstrate this technique. 21 references.

• OSTI ID: 5876917
• Report Number(s): CONF-8310121-
• Conference Information: Journal Name: Soc. Pet. Eng. AIME, Pap.; (United States) Journal Volume: SPE-12179
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
ENERGY SOURCES
FLUID FLOW
FOSSIL FUELS
FUELS
MULTIPHASE FLOW
OIL WELLS
PETROLEUM
RESERVOIR PRESSURE
STIMULATION
TIME DEPENDENCE
WELL PRESSURE
WELL STIMULATION
WELLS