Field results verify afterflow analysis from D. S. T. and short time production test

Conference · Thu Jan 01 04:00:00 EST 1976

OSTI ID:7311807

Milner, E E; Warren, Jr, D A; Claiborne, P M

The actual production performance of a number of wells have been compared to predictions made by the McKinley afterflow analysis of drill stem test and short time production test data on these wells. Many formations are tested for short time periods that do not give sufficient or conclusive data for reservoir analysis by conventional methods thereby necessitating use of an afterflow method. The example wells in this study show low permeability, wellbore damage, two zones with a large contrast in permeability, artificial stimulation and naturally occurring fracture systems with a tight matrix. Example plotted curve shapes of the above conditions are illustrated along with a discussion of how to recognize and use each. Limitations as well as the applications of the McKinley afterflow method are discussed. The most important use of the McKinley Afterflow Method is the ability to predict the tight matrix production rate of a well after a stimulated wellbore area has been depleted. Comparison of drill stem test analysis before completion with production test analysis after completion on the same well gives comparable answers. The conclusions reached from this study show the McKinley afterflow method gives reliable predictions of reservoir performance when conventional analysis methods cannot be used.

• OSTI ID: 7311807
• Report Number(s): CONF-761008-111
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
DRILL STEM TESTING
ENGINEERING
EVALUATION
OIL WELLS
PRESSURE GRADIENTS
RESERVOIR ENGINEERING
TESTING
WELLS