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 language | English |
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| Pages | 371-382 |
| Number of pages | 12 |
| Publication status | Published - 1990 |
| Externally published | Yes |
| Event | Proceedings: SPE Annual Technical Conference and Exhibition 1990 - New Orleans, LA, USA Duration: Sept 23 1990 → Sept 26 1990 |
Other
| Other | Proceedings: SPE Annual Technical Conference and Exhibition 1990 |
|---|---|
| City | New Orleans, LA, USA |
| Period | 9/23/90 → 9/26/90 |
ASJC Scopus subject areas
- Fuel Technology
- Energy Engineering and Power Technology