Study on a New Method for Calculating Water Saturation

Yang Kebing; Xie Li; Zhang Lei; Li Jun; Cao Chengcheng

doi:doi:10.11648/j.ogce.20190706.13

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Study on a New Method for Calculating Water Saturation

Yang Kebing, Xie Li, Zhang Lei, Li Jun, Cao Chengcheng

Published in International Journal of Oil, Gas and Coal Engineering (Volume 7, Issue 6)

Received: 20 October 2019 Accepted: 15 November 2019 Published: 25 November 2019

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Abstract

In order to improve the identification and evaluation accuracy of low resistivity oil layer and complex pore structure oil layer, and to avoid the interpretation error caused by the traditional evaluation mode of “high resistivity is oil layer and low resistivity is water layer”, the method of calculating water saturation by radial resistivity ratio was studied. The results show that the radial resistivity ratio can be used to calculate the reservoir water saturation for completely invaded formation, which can be deduced according to archie formula. The new formula does not evaluate oil and water layers based on high or low of resistivity, but can be used to evaluate low resistivity oil and high resistivity water layers. After testing core experimental data, The new formula can effectively calculate the water saturation and meet the requirement of using. After practical application of data, The average absolute error of the calculated water saturation is 3.55%, which conforms to the industry standard. This method is helpful to improve the coincidence rate of logging interpretation, and is worth popularizing.

Published in	International Journal of Oil, Gas and Coal Engineering (Volume 7, Issue 6)
DOI	10.11648/j.ogce.20190706.13
Page(s)	125-129
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), 2019. Published by Science Publishing Group

Keywords

Radial Resistivity Ratio, Reservoir Oil Bearing, Archie's Formula, Rock-electric Experiment, Sw Calculation, Oil and Water Layer Evaluation

References

[1]	Archie, G. E. The electrical resistivity log as an aid in determining some reservoir characteristics [J]. Tnas Am Inst MechEng, 1942, 146: 54-61.
[2]	Pickett, G. R. A review of current techniques for determination of water saturation from Logs [J]. Journal of Petroleum Technology, 1966, 18 (11): 1425-1433.
[3]	Clavier, C., Coates, G., Dumanoir, J. Theoretical and experimental bases for the dual-water model for interpretation of shaly sands [J]. Society of Petroleum Engineers Journal, 1984. 24 (2): 153-168.
[4]	Zhang, C. G., Mao, Z. Q., Ou, Y. J. The New technique for evaluating water saturation of the "low resistivity" reservoir In J Field [C]. SPWLA 35th Annual Logging Symposium, 1994, 19-22, June, Tulsa, Oklahoma.
[5]	Hamada, G. M., Alawad, M. Petrophysical Evaluation of Low Resistivity Sandstone Reservoirs [J]. Journal of Canadian Petroleum Technology, 2000, 39 (7).
[6]	Koelman, J. M., Fanini, O. N., Kreigshauser, B. F. Enhanced evaluation of low-resistivity reservoirs using multi-component induction log data [J]. Society of Petrophysicists and Well-Log Analysts, 2001, 42 (6).
[7]	Wen Tang. One Well Evaluation in Low Permeability Gas Sandstones from Nuclear Magnetic Resonance (NMR) logs [C]. SPE Middle East Unconventional Gas Conference and Exhibition, 2011, 31 January-2 February, Muscat, Oman.
[8]	Zakir Hossain. A relationship between rock physics and nuclear magnetic resonance [C]. SEG International Exposition and Annual Meeting, 2016, 16-21 October, Dallas, Texas.
[9]	Verga, F., Giaccardo, A., Gonfalini, M. Determination of uncertainties in water saturation calculations from well log data using a probabilistic approach [C]. Offshore Mediterranean Conference and Exhibition, 2001, 28-30 March, Ravenna, Italy.
[10]	Leandro, H. M., Alexandre, C. V., Ivan, M. F., et al. The impact of Archie´s parameters in the calculation of water saturation for carbonate reservoir, Campos Basin, Brazil [C]. SEG Annual Meeting, 2015, 18-23 October, New Orleans, Louisiana.
[11]	Sarihi, A., Vargas-Murillo, B. A method to compute water saturation in tight rocks accounting for conductivity of clay minerals [C]. Abu Dhabi International Petroleum Exhibition and Conference, 2015, 9-12 November, Abu Dhabi, UAE.
[12]	Yu Hongyan, Wei Xiaolong, Wang Zhenliang, et al. Review of water saturation calculation methods in shale gas reservoir [C]. SPE Asia Pacific Oil and Gas Conference and Exhibition, 2018, 23-25 October, Brisbane, Australia.
[13]	Deng Shaogui, Sun Qingtao, Li Hu, et al. The sensitivity of the array resistivity log to mud filtrate invasion and its primary five-parameter inversion for improved oil water recognition [J]. Petroleum Science, 2012, 9 (6): 295-302.
[14]	Yang Kebing, Yuan Xiaohong, Liu Mingbo, et al. Resistivity ratio method to evaluate oil-water layer [J]. Natural Gas Exploration & Development, 2015, 38 (1): 37-39.
[15]	Yang Kebing, Li Shidong, Wang Huijing, et al. Discussion on the method of evaluating oil and water layers by using ratio of deep resistivity and flush zone resistivity [J]. International Journal of Oil, Gas and Coal Engineering, 2019, 7 (1): 7-12.

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APA Style

Yang Kebing, Xie Li, Zhang Lei, Li Jun, Cao Chengcheng. (2019). Study on a New Method for Calculating Water Saturation. International Journal of Oil, Gas and Coal Engineering, 7(6), 125-129. https://doi.org/10.11648/j.ogce.20190706.13

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ACS Style

Yang Kebing; Xie Li; Zhang Lei; Li Jun; Cao Chengcheng. Study on a New Method for Calculating Water Saturation. Int. J. Oil Gas Coal Eng. 2019, 7(6), 125-129. doi: 10.11648/j.ogce.20190706.13

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AMA Style

Yang Kebing, Xie Li, Zhang Lei, Li Jun, Cao Chengcheng. Study on a New Method for Calculating Water Saturation. Int J Oil Gas Coal Eng. 2019;7(6):125-129. doi: 10.11648/j.ogce.20190706.13

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@article{10.11648/j.ogce.20190706.13,
  author = {Yang Kebing and Xie Li and Zhang Lei and Li Jun and Cao Chengcheng},
  title = {Study on a New Method for Calculating Water Saturation},
  journal = {International Journal of Oil, Gas and Coal Engineering},
  volume = {7},
  number = {6},
  pages = {125-129},
  doi = {10.11648/j.ogce.20190706.13},
  url = {https://doi.org/10.11648/j.ogce.20190706.13},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ogce.20190706.13},
  abstract = {In order to improve the identification and evaluation accuracy of low resistivity oil layer and complex pore structure oil layer, and to avoid the interpretation error caused by the traditional evaluation mode of “high resistivity is oil layer and low resistivity is water layer”, the method of calculating water saturation by radial resistivity ratio was studied. The results show that the radial resistivity ratio can be used to calculate the reservoir water saturation for completely invaded formation, which can be deduced according to archie formula. The new formula does not evaluate oil and water layers based on high or low of resistivity, but can be used to evaluate low resistivity oil and high resistivity water layers. After testing core experimental data, The new formula can effectively calculate the water saturation and meet the requirement of using. After practical application of data, The average absolute error of the calculated water saturation is 3.55%, which conforms to the industry standard. This method is helpful to improve the coincidence rate of logging interpretation, and is worth popularizing.},
 year = {2019}
}

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TY  - JOUR
T1  - Study on a New Method for Calculating Water Saturation
AU  - Yang Kebing
AU  - Xie Li
AU  - Zhang Lei
AU  - Li Jun
AU  - Cao Chengcheng
Y1  - 2019/11/25
PY  - 2019
N1  - https://doi.org/10.11648/j.ogce.20190706.13
DO  - 10.11648/j.ogce.20190706.13
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  - 125
EP  - 129
PB  - Science Publishing Group
SN  - 2376-7677
UR  - https://doi.org/10.11648/j.ogce.20190706.13
AB  - In order to improve the identification and evaluation accuracy of low resistivity oil layer and complex pore structure oil layer, and to avoid the interpretation error caused by the traditional evaluation mode of “high resistivity is oil layer and low resistivity is water layer”, the method of calculating water saturation by radial resistivity ratio was studied. The results show that the radial resistivity ratio can be used to calculate the reservoir water saturation for completely invaded formation, which can be deduced according to archie formula. The new formula does not evaluate oil and water layers based on high or low of resistivity, but can be used to evaluate low resistivity oil and high resistivity water layers. After testing core experimental data, The new formula can effectively calculate the water saturation and meet the requirement of using. After practical application of data, The average absolute error of the calculated water saturation is 3.55%, which conforms to the industry standard. This method is helpful to improve the coincidence rate of logging interpretation, and is worth popularizing.
VL  - 7
IS  - 6
ER  -

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Author Information

Yang Kebing

Petro China Huabei Oilfield Company, Renqiu, China
Xie Li

Petro China Huabei Oilfield Company, Renqiu, China
Zhang Lei

Petro China Huabei Oilfield Company, Renqiu, China
Li Jun

Petro China Huabei Oilfield Company, Renqiu, China
Cao Chengcheng

Petro China Huabei Oilfield Company, Renqiu, China

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Plain Text BibTeX RIS

APA Style

Yang Kebing, Xie Li, Zhang Lei, Li Jun, Cao Chengcheng. (2019). Study on a New Method for Calculating Water Saturation. International Journal of Oil, Gas and Coal Engineering, 7(6), 125-129. https://doi.org/10.11648/j.ogce.20190706.13

Copy | Download

ACS Style

Yang Kebing; Xie Li; Zhang Lei; Li Jun; Cao Chengcheng. Study on a New Method for Calculating Water Saturation. Int. J. Oil Gas Coal Eng. 2019, 7(6), 125-129. doi: 10.11648/j.ogce.20190706.13

Copy | Download

AMA Style

Yang Kebing, Xie Li, Zhang Lei, Li Jun, Cao Chengcheng. Study on a New Method for Calculating Water Saturation. Int J Oil Gas Coal Eng. 2019;7(6):125-129. doi: 10.11648/j.ogce.20190706.13

Copy | Download

@article{10.11648/j.ogce.20190706.13,
  author = {Yang Kebing and Xie Li and Zhang Lei and Li Jun and Cao Chengcheng},
  title = {Study on a New Method for Calculating Water Saturation},
  journal = {International Journal of Oil, Gas and Coal Engineering},
  volume = {7},
  number = {6},
  pages = {125-129},
  doi = {10.11648/j.ogce.20190706.13},
  url = {https://doi.org/10.11648/j.ogce.20190706.13},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ogce.20190706.13},
  abstract = {In order to improve the identification and evaluation accuracy of low resistivity oil layer and complex pore structure oil layer, and to avoid the interpretation error caused by the traditional evaluation mode of “high resistivity is oil layer and low resistivity is water layer”, the method of calculating water saturation by radial resistivity ratio was studied. The results show that the radial resistivity ratio can be used to calculate the reservoir water saturation for completely invaded formation, which can be deduced according to archie formula. The new formula does not evaluate oil and water layers based on high or low of resistivity, but can be used to evaluate low resistivity oil and high resistivity water layers. After testing core experimental data, The new formula can effectively calculate the water saturation and meet the requirement of using. After practical application of data, The average absolute error of the calculated water saturation is 3.55%, which conforms to the industry standard. This method is helpful to improve the coincidence rate of logging interpretation, and is worth popularizing.},
 year = {2019}
}

Copy | Download

TY  - JOUR
T1  - Study on a New Method for Calculating Water Saturation
AU  - Yang Kebing
AU  - Xie Li
AU  - Zhang Lei
AU  - Li Jun
AU  - Cao Chengcheng
Y1  - 2019/11/25
PY  - 2019
N1  - https://doi.org/10.11648/j.ogce.20190706.13
DO  - 10.11648/j.ogce.20190706.13
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  - 125
EP  - 129
PB  - Science Publishing Group
SN  - 2376-7677
UR  - https://doi.org/10.11648/j.ogce.20190706.13
AB  - In order to improve the identification and evaluation accuracy of low resistivity oil layer and complex pore structure oil layer, and to avoid the interpretation error caused by the traditional evaluation mode of “high resistivity is oil layer and low resistivity is water layer”, the method of calculating water saturation by radial resistivity ratio was studied. The results show that the radial resistivity ratio can be used to calculate the reservoir water saturation for completely invaded formation, which can be deduced according to archie formula. The new formula does not evaluate oil and water layers based on high or low of resistivity, but can be used to evaluate low resistivity oil and high resistivity water layers. After testing core experimental data, The new formula can effectively calculate the water saturation and meet the requirement of using. After practical application of data, The average absolute error of the calculated water saturation is 3.55%, which conforms to the industry standard. This method is helpful to improve the coincidence rate of logging interpretation, and is worth popularizing.
VL  - 7
IS  - 6
ER  -

Copy | Download