Research and application of multi hydracid multilevel hierarchical acidification

DOI

10.2991/icmemtc-16.2016.22How to use a DOI?

Keywords

Multi-hydrogen acid; Layered acidification; Low permeability reservoir; decompression and stimulate

Abstract

M31 block of sandstone reservoirs, with strong heterogeneity and poor physical property, belongs to ultra-low permeability reservoirs, and the reservoir permeability is around 9mD. The clay mineral content exceeds 5%, and the daily water capacity can't meet the requirements of injection allocation. Reservoir near Wells is contaminated, and the oil and liquids production of corresponding wells is very low. For ultra-low permeability sandstone reservoir characteristics, a new type of acidification process called Multi hydracid multilevel hierarchical Acidification is obtained through laboratory study. This process can overcome limitations of the conventional acidification such as small effective role radius and acidified precipitate secondary pollution, and can avoid the effect of different reservoirs between acidification, to effectively improve the water injection profile. The application of the new process in Well M31-6 field shows that hydrogen-acid multilevel hierarchical acidification process is simple and practical, and can reduce water injection pressure and increase water capacity significantly, which has an important reference for the future development of ultra-low permeability sandstone reservoirs and enhancing the final oil recovery.

Copyright

© 2016, 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  - Zhixiang Zhu
AU  - Wenying Zhang
PY  - 2016/04
DA  - 2016/04
TI  - Research and application of multi hydracid multilevel hierarchical acidification
BT  - Proceedings of the 2016 3rd International Conference on Materials Engineering, Manufacturing Technology and Control
PB  - Atlantis Press
SP  - 116
EP  - 121
SN  - 2352-5401
UR  - https://doi.org/10.2991/icmemtc-16.2016.22
DO  - 10.2991/icmemtc-16.2016.22
ID  - Zhu2016/04
ER  -