Innovative Geosteering Strategies for the Sustainable Development of Mature Oilfields

doi:10.11885/j.issn.1674-5086.2015.08.30.01

Abstract

Abstract: Based on the overall goals of geosteering in horizontal wells, we have proposed an innovative strategy for geosteering based on boundary detection and borehole imaging techniques, to resolve uncertainties in subsurface structure, and stratum and fluid characteristics. This strategy allows highly-effective control of the bore to produce smooth bore trajectories, and accurate steering of the bore within a stratum to allow horizontally-drilled bore trajectories to proceed as closely as possible to the ceiling of a reservoir (within 0-1 m of the ceiling). Successful implementations of this strategy in various types of oil reservoirs have shown that this innovative geosteering strategy can improve well-drilling effectiveness, decrease costs, and contribute significantly towards the production optimization; with this strategy, 2000-6000 barrels were produced a day from an oil well, with extremely low levels of water content, and the cumulative production of the oil field has exceeded initial estimates by 17%. Hence, we have effectively optimized the recovery rate of oil fields by avoiding "attic" oil and postponing the use of waterflooding in a well. Furthermore, the updating of post-drilling geological oil reserve models may provide an effective form of guidance for the optimization of well deployment and development strategies in the future.

Key words: mature oil fields, geosteering strategies, sustainable development, boundary detection, recovery rate

CLC Number:

TE122

TAO Bin, LI Lin, CHANG Botao, WANG Chao, HE Jingbo. Innovative Geosteering Strategies for the Sustainable Development of Mature Oilfields[J]. 西南石油大学学报(自然科学版), 2017, 39(2): 62-70.

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URL: http://journal15.magtechjournal.com/Jwk_xnzk/EN/10.11885/j.issn.1674-5086.2015.08.30.01

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