Qualitative Discuss on Well Test Curve Uncertainty Analysis in Remaining oil Evaluation of Thick Bottom Reservoir

Ren Chaoqun; Li Wenhong; Xue Guoqing; Chen Xin; Lin Ruimin; Zhang Peng; Wang Mingwei

doi:doi:10.11648/j.ogce.20180606.16

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Qualitative Discuss on Well Test Curve Uncertainty Analysis in Remaining oil Evaluation of Thick Bottom Reservoir

Ren Chaoqun, Li Wenhong, Xue Guoqing, Chen Xin, Lin Ruimin, Zhang Peng, Wang Mingwei

Published in International Journal of Oil, Gas and Coal Engineering (Volume 6, Issue 6)

Received: 31 July 2018 Accepted: 18 October 2018 Published: 9 November 2018

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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.

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), 2018. Published by Science Publishing Group

Keywords

Thick Bottom Water Reservoir, Well Test Curve, Uncertainty Analysis, Rising Law of Water Content, Remaining Oil

References

[1]	HE Fen, LI Tao, SU Yanchun, et al. Offshore Oilfield Perforation Scheme Optimization Research and Application [J]. Science Technology and Engineering, 2014, 14(27):198-201.
[2]	LIU Chuangang, BAO Chenyi, ZUO Kai, et al. Mechanical analyses on and solutions to anti-channeling for gravel-packing completion string [J]. Oil Drilling & Production Technology, 2016, 38(2):176-180.
[3]	LIU Nengqiang. Practical Modern Well Test Interpretation Method. Beijing: Petroleum Industry Press, 2008.
[4]	LIN Jiaen. Value and function of oil & gas well testing data [J]. Well Testing, 2016, 25(4):38-43.
[5]	OUYANG Weiping LIU Yuewu. Effects of Perforated Completion Parameters on Well Test Type Curves [J]. Acta Petrolei Sinica, 2013, 34(3):528-533.
[6]	ZHANG Junwei. Application of Part of the Perforated Well Test Interpretation Model in Hailaer Oilfield [J]. Well Testing, 2015, 24(5):33-35.
[7]	ZHANG Tongyi, YAN Dong, XU Shao. A Study of Method to Determine Resident Oil Distribution by Well Test Data [J]. Well Testing, 2001, 10(1, 2):10-12.
[8]	LIU Hong. Well testing interpreptation method research of preferential seepage channels [J]. Petroleum Geology and Engineering, 2015, 29(2):98-100, 136.
[9]	YANG Liu, HONG Chuqiao, REN Chaoqun, et al. Application of uncertainty analysis for reservoir numerical simulation in well test interpretation [J]. Well Testing, 2016, 25(4):23-25.
[10]	LIANG Shangbin. Oil saturation estimation by multi-cycle draw-down test [J]. Special Oil and Gas Reservoirs, 2016, 23(5):82-85.
[11]	YAN Jianli, QUAN Bo, DANG Shengguo. Comprehensive application of multiphase flow equivalent characterization well test analysis method in offshore edge-bottom water reservoir [J]. Reservoir Evaluation and Development, 2016, 6(5):29-34.
[12]	HE Qi. Application of well test analysis on reservoir numeral simulation [J]. Natural Gas Exploration and Development, 2005, 28(1):28-30.

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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

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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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AMA 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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@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}
}

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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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Author Information

Ren Chaoqun

Research Institute, CNOOC Ltd., Zhanjiang, China
Li Wenhong

Research Institute, CNOOC Ltd., Zhanjiang, China
Xue Guoqing

Research Institute, CNOOC Ltd., Zhanjiang, China
Chen Xin

Research Institute, CNOOC Ltd., Zhanjiang, China
Lin Ruimin

Research Institute, CNOOC Ltd., Zhanjiang, China
Zhang Peng

Research Institute, CNOOC Ltd., Zhanjiang, China
Wang Mingwei

Research Institute, CNOOC Ltd., Zhanjiang, China

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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

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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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AMA 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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@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}
}

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