A new set of type curves for well-test interpretation with the pressure/pressure-derivative ratio

Journal Article · Thu Jun 01 04:00:00 EDT 1989 · SPE (Society of Petroleum Engineers) Format. Eval.; (United States)

DOI:https://doi.org/10.2118/16812-PA· OSTI ID:5794890

Duong, A H

This paper presents a new set of type curves used in a well-test analysis for homogeneous reservoirs with wellbore storage and skin effects. When the pressure/pressure-derivative ratio (PDR) is used as a parameter in constructing the type curves, the vertical scales on both type-curve and field-data plots are identical. This automatic alignment of the vertical scale makes the new type curves easier to match and, subsequently, easier to use in the computer-aided analysis. The paper concludes that use of the new type curves reduces the uniqueness problem in pressure-transient type-curve matching, identifies the flow regimes effectively, and gives greater confidence in the results. A new method to correct the pressure buildup when drawdown type curves are used in radial-flow wells is also proposed. Two example applications, one with a long producing time and one with a short producing time before shut-in are included to demonstrate the use of these type curves.

• Research Organization: Gulf Canada Resources Ltd., Calgary, AB (Canada)
• OSTI ID: 5794890
• Journal Information: SPE (Society of Petroleum Engineers) Format. Eval.; (United States), Journal Name: SPE (Society of Petroleum Engineers) Format. Eval.; (United States) Vol. 4:2; ISSN SFEVE
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
03 NATURAL GAS
030200 -- Natural Gas-- Reserves
Geology
& Exploration
COMPUTER CALCULATIONS
DATA ANALYSIS
EXPLORATORY WELLS
FIELD TESTS
FLOW RATE
PARAMETRIC ANALYSIS
RESERVOIR PRESSURE
RESERVOIR ROCK
TESTING
WELL PRESSURE
WELLS