The performance of perforated completions in gas reservoirs

Journal Article · Thu Nov 01 00:00:00 EST 1990 · SPE (Society of Petroleum Engineers) Reservoir Engineering; (USA)

DOI:https://doi.org/10.2118/16384-PA· OSTI ID:6088675

Ichara, M J ^[1]

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1. Petroleum Engineering Dept., Univ. of Port Harcourt (NG)

A finite-element program was used to study the influence of shot density, perforation length, phasing angle, formation permeability, formation anisotropy, and turbulence factor on the performance of perforated completions in gas reservoirs. The results indicate that when permeability is low ({lt}10 md), turbulence effects are negligible, and perforation length and phasing angle affect productivity ratio. In an isotropic formations, high shot density ({ge}10 md), turbulence effects are negligible, and perforation length and phasingagle effect productivity ratio. In anisotropic formation, high shot density ({ge}12 shots/ft (39 shots/m)) with deep penetration ({le}15 in (38 cm)) is required for the well to perform better than an openhole completion. Turbulence effects can cause up to 75% loss in production in high-permeability formations. The nomograph presented can be used to predict productivity ratios and skin factors in gas reservoirs.

• OSTI ID: 6088675
• Journal Information: SPE (Society of Petroleum Engineers) Reservoir Engineering; (USA), Vol. 5:4; ISSN 0885-9248
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
03 NATURAL GAS
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
FRACTURED RESERVOIRS
PERFORMANCE TESTING
GEOLOGIC FORMATIONS
PERMEABILITY
ANISOTROPY
CALCULATION METHODS
FINITE ELEMENT METHOD
FORMATION DAMAGE
PRODUCTIVITY
WELL COMPLETION
NUMERICAL SOLUTION
TESTING
020300* - Petroleum- Drilling & Production
030300 - Natural Gas- Drilling
Production
& Processing
990200 - Mathematics & Computers