Stress sensitivity of low permeability gas reservoir under different test conditions

DOI

10.2991/iceesd-17.2017.88How to use a DOI?

Keywords

stress sensitivity; low permeability gas reservoir; triaxial stress; back pressure

Abstract

Past researches found that the results got by triaxial stress sensitivity experiments are near the fact of field, but the experimental conditions are not ascertain. This paper carried out triaxial stress sensitivity experiments under different testing conditions, such as back pressure, loading speed of confining pressure and the size of the axial stress. The results indicate that: relationship between net stress and dimensionless permeability follows exponential function; if there is back pressure on outlet of the testing cores, the stress sensitivity tested will be stronger; with the increase of axial stress, the stress sensitivity becomes weaker, to simulate the actual reservoir, the experiment should be carried out under the condition of triaxial stress; the faster the rising speed of the confining pressure, the more serious the stress sensitivity of the core, so proper loading speed should be selected when carrying out the stress sensitivity experiments. The studying results provide theoretical references for how carrying out stress sensitivity experiments.

Copyright

© 2017, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Jian Yan
AU  - Aojiang Qi
AU  - Meitao Fu
PY  - 2017/04
DA  - 2017/04
TI  - Stress sensitivity of low permeability gas reservoir under different test conditions
BT  - Proceedings of the 2017 6th International Conference on Energy, Environment and Sustainable Development (ICEESD 2017)
PB  - Atlantis Press
SP  - 464
EP  - 468
SN  - 2352-5401
UR  - https://doi.org/10.2991/iceesd-17.2017.88
DO  - 10.2991/iceesd-17.2017.88
ID  - Yan2017/04
ER  -