Gas-cap effects in pressure transient response of naturally fractured reservoirs

A. S. Al-Bemani*, I. Ershaghi

*Corresponding author for this work

Research output: Contribution to conferencePaperpeer-review

Abstract

This paper presents a theoretical framework of gas cap effects in naturally fractured reservoirs. General pressure solutions are derived for both pseudo-steady state and unsteady state matrix-fracture interporosity flow. Deviation from the fracture or fracture-matrix response occurs as the gas cap effect is felt. Anomalous slope changes, during the transition period, depends entirely on the contrast between the fracture anisotropy parameter λ1 and matrix-fracture interporosity parameter λ, and between the total gap cap storage capacitance ω-1$/ and oil zone matrix storage ω. A composite double porosity response is observed for ω-1$/ ≤ ω-1c$/ and 1.0 ≤ λ1/λ ≤ 100.0. A triple porosity response is observed for ω-1$/ > ω-1c$/ and 140 < ωλ1/λ ≤ 1.0E05.

Original languageEnglish
Pages371-382
Number of pages12
Publication statusPublished - 1990
Externally publishedYes
EventProceedings: SPE Annual Technical Conference and Exhibition 1990 - New Orleans, LA, USA
Duration: Sep 23 1990Sep 26 1990

Other

OtherProceedings: SPE Annual Technical Conference and Exhibition 1990
CityNew Orleans, LA, USA
Period9/23/909/26/90

ASJC Scopus subject areas

  • Fuel Technology
  • Energy Engineering and Power Technology

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