Steam-soak performance in south Oman
- Koninklijke Shell E and P Lab. (NL)
With about 2 {times} 10{sup 9} stock-tank m{sup 3} (12.6 {times} 10{sup 9} STB) of medium/heavy oil originally in place (OOIP) in south Oman, considerable scope exists for increasing oil recovery by thermal methods. The viability of thermal recovery in south Oman was tested with a steamflood pilot in the Al Khlata sands of the Marmul field and a 2-year steam-soak project to test the applicability of steam soak in five south Oman oil fields producing heavy oil. This paper describes the performance of the latter project. The wells selected for the test program included a wide range of south Oman reservoir and oil characteristics i.e., the main reservoir drive mechanisms of depletion, solution-gas, and edge- and bottomwater drive, the reservoir sandbody types, and oil viscosities from 80 to 4000 mPa {center dot} s (80 to 4,000 cp). Steam-soak operations were successful, and oil production accelerated significantly, with an average stimulate production rate twice that before stimulation. Acceleration was less marked in wells where reservoir energy is limited or where the primary (cold) water cut is more than 30%. At primary (cold) water cuts {gt}50%, no increase in oil production rate was observed. The process was simulated numerically for several wells, with the results in close agreement with performance. Improved understanding of the process resulting from the simulation allowed the most important factors influencing performance to be identified and aided process optimization in the field test. Two small-scale steam-soak projects currently are being assessed for implementatioimplementation in the early 1990's.
- OSTI ID:
- 5344095
- Journal Information:
- SPE (Society of Petroleum Engineers) Reservoir Engineering; (United States), Vol. 6:4; ISSN 0885-9248
- Country of Publication:
- United States
- Language:
- English
Similar Records
Design of a pilot polymer flood in the Marmul Field, Oman
Development of heavy oil reserves in South Oman
Related Subjects
OIL FIELDS
FIELD TESTS
STEAM INJECTION
OIL WELLS
OPTIMIZATION
THERMAL RECOVERY
OMAN
PETROLEUM
VISCOSITY
PILOT PLANTS
WELL STIMULATION
ASIA
DEVELOPING COUNTRIES
ENERGY SOURCES
ENHANCED RECOVERY
FLUID INJECTION
FOSSIL FUELS
FUELS
FUNCTIONAL MODELS
GEOLOGIC DEPOSITS
MIDDLE EAST
MINERAL RESOURCES
PETROLEUM DEPOSITS
RESOURCES
STIMULATION
TESTING
WELLS
020300* - Petroleum- Drilling & Production
023000 - Petroleum- Properties & Composition