Pressure transient analysis in poorly consolidated reservoirs

Journal Article · Mon Dec 01 04:00:00 EST 1986 · SPE (Society of Petroleum Engineers) Format. Eval.; (United States)

DOI:https://doi.org/10.2118/10086-PA· OSTI ID:6961914

Ichara, M J; Caudle, B H

This study uses a numerical solution technique to investigate the effect on well test data of sand accumulation in the wellbore from poorly consolidated reservoirs. The results show that in anisotropic reservoirs, this sand column creates a pressure drop in the wellbore similar to that caused by infinitesimally thin skin around the wellbore. In this case, however, the slope of the semilog straight line for a buildup test is increased, indicating that the conventional analysis method would not yield accurate results. Log-log type curves and semilog plots of dimensionless pressure vs. dimensionless time are presented in this paper for different cases. These graphs can be used to detect the presence of sand in the wellbore and to analyze the transient pressure data instead of the Horner and Miller-Dyes-Hutchinson (MDH) methods. Graphs for various cases are provided for use in determining the pseudoskin factors caused by the presence of a sand column in the wellbore.

• Research Organization: Schlumberger Well Services, Houston, TX
• OSTI ID: 6961914
• Journal Information: SPE (Society of Petroleum Engineers) Format. Eval.; (United States), Journal Name: SPE (Society of Petroleum Engineers) Format. Eval.; (United States) Vol. 1:6; ISSN SFEVE
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
ANISOTROPY
DIAGRAMS
DIMENSIONS
ENGINEERING
FORMATION DAMAGE
GRAPHS
NUMERICAL SOLUTION
OIL WELLS
PRESSURE DROP
RESERVOIR ENGINEERING
RESERVOIR PRESSURE
SAND CONSOLIDATION
TESTING
THICKNESS
TIME DEPENDENCE
TRANSIENTS
WELL LOGGING
WELL PRESSURE
WELLS