In directional wells of thick bottom water reservoir, partial perforation is usually applied to prevent rapid coning of bottom water. Because of the existence of interlayers, water driving conditions and remaining oil distribution become complex. In partially perforated wells in the survey area oil saturation of lower unperforated section can’t be tested directly due to the influence of completion structure. The "spherical flow" characteristics cannot be seen from the pressure derivative curve during the pressure building. The uncertainty analysis of well-test curve is used in the analysis of interpretation model, Kz/Kr value and boundary feature. The results show that the unperforated section at the lower part, slightly affected by the water flooding, contributes less to oil production. Through the study on reservoir numerical simulation mechanism, it’s concluded that in oil wells driven by bottom, water cut features rapid rise in early stage and slow rise in later stage. The water cut rise curve mainly belongs to a convex type. In contrast, in oil well driven by edge water, water cut rises slowly in early stage but rapidly later. The water cut curve is mainly a concave type. The research well shows a concave type in the water cut curve. Test data shows the well is driven by edge water under the influence of interlayer. The unperforated section at the lower part of reservoir where the remaining oil concentrates can become the target of further tapping.
| Published in | International Journal of Oil, Gas and Coal Engineering (Volume 6, Issue 6) |
| DOI | 10.11648/j.ogce.20180606.16 |
| Page(s) | 164-170 |
| Creative Commons |
This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited. |
| Copyright |
Copyright © The Author(s), 2024. Published by Science Publishing Group |
Thick Bottom Water Reservoir, Well Test Curve, Uncertainty Analysis, Rising Law of Water Content, Remaining Oil
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APA Style
Ren Chaoqun, Li Wenhong, Xue Guoqing, Chen Xin, Lin Ruimin, et al. (2018). Qualitative Discuss on Well Test Curve Uncertainty Analysis in Remaining oil Evaluation of Thick Bottom Reservoir. International Journal of Oil, Gas and Coal Engineering, 6(6), 164-170. https://doi.org/10.11648/j.ogce.20180606.16
ACS Style
Ren Chaoqun; Li Wenhong; Xue Guoqing; Chen Xin; Lin Ruimin, et al. Qualitative Discuss on Well Test Curve Uncertainty Analysis in Remaining oil Evaluation of Thick Bottom Reservoir. Int. J. Oil Gas Coal Eng. 2018, 6(6), 164-170. doi: 10.11648/j.ogce.20180606.16
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Download@article{10.11648/j.ogce.20180606.16,
author = {Ren Chaoqun and Li Wenhong and Xue Guoqing and Chen Xin and Lin Ruimin and Zhang Peng and Wang Mingwei},
title = {Qualitative Discuss on Well Test Curve Uncertainty Analysis in Remaining oil Evaluation of Thick Bottom Reservoir},
journal = {International Journal of Oil, Gas and Coal Engineering},
volume = {6},
number = {6},
pages = {164-170},
doi = {10.11648/j.ogce.20180606.16},
url = {https://doi.org/10.11648/j.ogce.20180606.16},
eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ogce.20180606.16},
abstract = {In directional wells of thick bottom water reservoir, partial perforation is usually applied to prevent rapid coning of bottom water. Because of the existence of interlayers, water driving conditions and remaining oil distribution become complex. In partially perforated wells in the survey area oil saturation of lower unperforated section can’t be tested directly due to the influence of completion structure. The "spherical flow" characteristics cannot be seen from the pressure derivative curve during the pressure building. The uncertainty analysis of well-test curve is used in the analysis of interpretation model, Kz/Kr value and boundary feature. The results show that the unperforated section at the lower part, slightly affected by the water flooding, contributes less to oil production. Through the study on reservoir numerical simulation mechanism, it’s concluded that in oil wells driven by bottom, water cut features rapid rise in early stage and slow rise in later stage. The water cut rise curve mainly belongs to a convex type. In contrast, in oil well driven by edge water, water cut rises slowly in early stage but rapidly later. The water cut curve is mainly a concave type. The research well shows a concave type in the water cut curve. Test data shows the well is driven by edge water under the influence of interlayer. The unperforated section at the lower part of reservoir where the remaining oil concentrates can become the target of further tapping.},
year = {2018}
}
TY - JOUR T1 - Qualitative Discuss on Well Test Curve Uncertainty Analysis in Remaining oil Evaluation of Thick Bottom Reservoir AU - Ren Chaoqun AU - Li Wenhong AU - Xue Guoqing AU - Chen Xin AU - Lin Ruimin AU - Zhang Peng AU - Wang Mingwei Y1 - 2018/11/09 PY - 2018 N1 - https://doi.org/10.11648/j.ogce.20180606.16 DO - 10.11648/j.ogce.20180606.16 T2 - International Journal of Oil, Gas and Coal Engineering JF - International Journal of Oil, Gas and Coal Engineering JO - International Journal of Oil, Gas and Coal Engineering SP - 164 EP - 170 PB - Science Publishing Group SN - 2376-7677 UR - https://doi.org/10.11648/j.ogce.20180606.16 AB - In directional wells of thick bottom water reservoir, partial perforation is usually applied to prevent rapid coning of bottom water. Because of the existence of interlayers, water driving conditions and remaining oil distribution become complex. In partially perforated wells in the survey area oil saturation of lower unperforated section can’t be tested directly due to the influence of completion structure. The "spherical flow" characteristics cannot be seen from the pressure derivative curve during the pressure building. The uncertainty analysis of well-test curve is used in the analysis of interpretation model, Kz/Kr value and boundary feature. The results show that the unperforated section at the lower part, slightly affected by the water flooding, contributes less to oil production. Through the study on reservoir numerical simulation mechanism, it’s concluded that in oil wells driven by bottom, water cut features rapid rise in early stage and slow rise in later stage. The water cut rise curve mainly belongs to a convex type. In contrast, in oil well driven by edge water, water cut rises slowly in early stage but rapidly later. The water cut curve is mainly a concave type. The research well shows a concave type in the water cut curve. Test data shows the well is driven by edge water under the influence of interlayer. The unperforated section at the lower part of reservoir where the remaining oil concentrates can become the target of further tapping. VL - 6 IS - 6 ER -
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