A new method to calculate sweep efficiency of horizontal wells in heterogeneous reservoir

This paper discusses the development challenges of an offshore fluvial oil reservoir with horizontal wells. In highly productive sandstone reservoirs, horizontal wells suffer from uneven flow profile and subsequent premature coning effects because of sand heterogeneity and heel to toe effect. Moreov...

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Bibliographic Details
Published in:Journal of petroleum exploration and production technology 2019-09, Vol.9 (3), p.2019-2026
Main Authors: Su, Y. C., Shi, H. F., He, Y. F.
Format: Article
Language:English
Subjects:
Computational efficiency
Computing time
Earth and Environmental Science
Earth Sciences
Efficiency
Energy Systems
Fluvial oil reservoir
Geology
Heterogeneity
Horizontal wells
Industrial and Production Engineering
Industrial Chemistry/Chemical Engineering
Inflow
Inflow control device
Mathematical analysis
Monitoring/Environmental Analysis
Offshore
Offshore Engineering
Oil
Oil reservoirs
Original Paper - Production Engineering
Permeability
Sand
Sandstone
Sedimentary rocks
Sweep efficiency
Water inflow
Wells
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Summary:This paper discusses the development challenges of an offshore fluvial oil reservoir with horizontal wells. In highly productive sandstone reservoirs, horizontal wells suffer from uneven flow profile and subsequent premature coning effects because of sand heterogeneity and heel to toe effect. Moreover, excessively increasing the production rate or horizontal well length can increase the risk of limited sweep efficiency, resulting in remaining oil in the toe or poor sand with low permeability. First, we analyze the characters of fluvial oil reservoir focusing on sand architecture and heterogeneity. Second, the sweep efficiency was calculated by the production data. Finally, we optimize inflow control device (ICD) for several wells and compare the response of ICD wells with conventional screen completion wells.
ISSN:2190-0558
2190-0566
DOI:10.1007/s13202-018-0595-4