Evaluation of Flow Characteristics of Perforations Including Nonlinear Effects with the Finite-Element Method

Abstract

This study presents results of finite-element modeling of steady-state flow in perforated natural completions. Use of a mesh chosen carefully by grid sensitivity analysis permits evaluation of flow with more precision than that achieved by previous investigators. Also, for the first time, flow characteristics of perforated completions are evaluated with the non-Darcy effect resulting from converging flow around the perforation taken into account. The results indicate (1) confirmation of Locke's results qualitatively but 5 to 10% overprediction by the nomograph, (2) the importance of angular phasing between adjacent perforations, (3) the uncertainty in generally accepted severe permeability impairment in the compacted zone, and (4) a significant reduction in productivity owing to a non-Darcy effect around the perforation for high-rate gas wells.

Department(s)

Mining Engineering

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 1987 Society of Petroleum Engineers (SPE), All rights reserved.

Publication Date

01 Jan 1987

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