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Abstract

Summary

It was found that natural gas could dissolve into B pool crude and formation volume factor could increase to 1.23. Crude oil viscosity was significantly decreased by 50%, indicating viscosity drop mechanism. 1D and 2D visible microscopic experiments revealed foamy oil behavior including emulsification, dispersion and displacement. Three phases, i.e. oil-gas phase, foamy oil phase and oil phase could be observed in 2D visible experiments. In long tube physical simulation experiments, formation dip and condensate content had been incorporated to simulate field natural gas huff and puff operations. Good match of cycle recovery factor to date and GOR had been realized.

The production enhancement mechanism revealed by laboratory study of natural gas huff and puff includes viscosity drop, oil swelling, foamy oil behavior. Long tube physical simulation experiments had realized good match in terms of key production indicators. This paper provided an insight into natural gas huff and puff behavior and mechanism through laboratory study.

© EAGE Publications BV
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/content/papers/10.3997/2214-4609.201701913
2017-04-24
2024-04-26

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http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201701913
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A Laboratory Study of Production Enhancement Mechanism of Natural Gas Huff and Puff
Conference Proceedings 2017, 1 (2017); https://doi.org/10.3997/2214-4609.201701913
/content/papers/10.3997/2214-4609.201701913
/content/papers/10.3997/2214-4609.201701913
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