Effects of underbalance on perforation flow

Journal Article · Mon May 01 04:00:00 EDT 1989 · SPE (Society of Petroleum Engineers) Product. Eng.; (United States)

DOI:https://doi.org/10.2118/16895-PA· OSTI ID:5965998

Halleck, P M; Deo, M

In a study of perforation flow in standard API test targets, underbalance between 500 and 1,000 psi (3.4 and 6.9 MPa) was needed to obtain optimum flow efficiency. Perforation cleanup due to transient pressure gradients was separated from that caused by postshot, steady-state flow. Perforations with low initial flow efficiencies could be improved by steady-state washing, but not to optimum levels. The amount of rock debris washed from the perforation during the washing phase correlated directly with the shooting underbalance applied. Tests performed in kerosene-saturated, brine-free targets resulted in generally lower flow efficiencies and required higher underbalances to obtain optimum levels.

• Research Organization: 9517765; 5915000
• OSTI ID: 5965998
• Journal Information: SPE (Society of Petroleum Engineers) Product. Eng.; (United States), Journal Name: SPE (Society of Petroleum Engineers) Product. Eng.; (United States) Vol. 4:2; ISSN SPENE
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020200 -- Petroleum-- Reserves
Geology
& Exploration
020300* -- Petroleum-- Drilling & Production
BRINES
CLEANING
FLUID FLOW
FUELS
KEROSENE
LIQUID FUELS
OPTIMIZATION
PERFORATION
PETROLEUM PRODUCTS
PHASE STUDIES
PRESSURE GRADIENTS
RESERVOIR ROCK
STEADY-STATE CONDITIONS
SWEEP EFFICIENCY