Effect of injectant composition and pressure on displacement of oil by enriched hydrocarbon gases
- Exxon Production Research Co., Houston, TX (United States)
Reservoir-condition phase-behavior and tertiary-gas flood studies have been conducted in the laboratory to investigate the effect of hydrocarbon-injectant composition and pressure on oil-displacement efficiency. Lower oil-recovery efficiencies and lower injectant mobilities have been observed at lower enrichment levels and/or at lower pressures. Coreflood oil recoveries, however, remained high for gas injectants that are below multiple-contact miscible (MCM) with the oil. These results suggest that near-miscible hydrocarbon-gas-injection processes show promise and that there may be a trade-off between local oil-displacement efficiency and gas-sweep efficiency in near-miscible displacements in the field.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 49263
- Journal Information:
- SPE Reservoir Engineering, Journal Name: SPE Reservoir Engineering Journal Issue: 2 Vol. 10; ISSN 0885-9248; ISSN SREEEF
- Country of Publication:
- United States
- Language:
- English
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