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Discussion on the Method of Evaluating Oil and Water Layers by Using Ratio of Deep Resistivity and Flush Zone Resistivity

Received: 10 November 2018    Accepted: 3 December 2018    Published: 21 January 2019
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Abstract

The depth-shallow resistivity ratio method for the same measuring point is an important method to identify oil and water reservoirs, But its application effect in conventional logging data is not good. By studying the invasion characteristics of resistivity curves of reservoirs, the ratio of deep resistivity and flush zone resistivity at the same measuring point is used to evaluate oil and water layers with a good effect. Further research shows that the ratio of deep resistivity to flushing zone resistivity can reflect the oil-bearing property of reservoir. The fact that the ratio of deep resistivity and flush zone resistivity of water layers in the same well is basically a constant supports this view, which can be deduced from Archie's formula. That is, the ratio of deep resistivity to flushing zone resistivity is Rw/Rmf, which is the ratio of formation water resistivity to mud filtrate resistivity. On this basis, a method of evaluating oil and water reservoir by using the ratio of deep resistivity and flush zone resistivity is proposed. One is logging crossplot evaluation method, the other is apparent water saturation calculation and evaluation method. These two methods are not affected by the changes of lithology and resistivity of the reservoir, and do not need data such as porosity, rock-electro parameters and formation water resistivity, which can quickly identify oil and water layers. As the ratio between the deep resistivity and the resistivity of the flush zone is not related to the resistivity of the reservoir, it can be used to evaluate the low resistivity oil reservoir. The results show that it is effective to identify low resistivity reservoirs and it is a reliable method to evaluate low resistivity reservoirs.

Published in International Journal of Oil, Gas and Coal Engineering (Volume 7, Issue 1)
DOI 10.11648/j.ogce.20190701.12
Page(s) 7-12
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

Keywords

Deep and Flush Zone Resistivity, Resistivity Ratio, Logging Crossplot, Sw, Identification of Low Resistivity Reservoir

References
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[3] Myers, R. R., Batcheller, G., Phipps, S. Strategies for unraveling the mystery of low-resistivity pay zones [S]. 2005. SPE98061.
[4] Llamosa, O., Hampton, D., Patiño, C. et al. Recognition and causes of low resistivity pay zones in cretaceous clastic reservoirs: acase study from an oilfield in Northern Llanos Basin, Colombia [S]. 2012. SPWLA 53rd Annual Logging Symposium, At Cartagena, Colombia.
[5] Zhang Chengguang, Mao Zhiqiang, Ou yangjian. The New technique for evaluating water saturation of the "low resistivity" reservoir In J Field [S]. 1994. SPWLA 35th Annual Logging Symposium, 19-22, June, Tulsa, Oklahoma.
[6] Hamada, G. M., Al-Blehed, M. S., Al-Awad, M. N. Determining petrophysical properties of low resistivity reservoirs using nuclear magnetic resonance logs [S]. 1999. SPE Annual Technical Conference and Exhibition, 3-6 October, Houston, Texas.
[7] 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).
[8] Archie G E. The electrical resistivity log as an aid in determining some reservoir characteristics [J]. Tnas Am Inst MechEng, 1942, 146: 54-61.
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[15] Li Changxi, Shi Yujiang, Zhou Cancan, et al. Evaluation of low amplitude and low resistivity pay zones under the fresh drilling mud invasion condition [J]. Petroleum Exploration and Development, 2010, 37 (6): 696-702.
[16] 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.
[17] Huang Ruokun, Qi tingting, Zhang Zhigang, et al. The application of identification method of asphalt sandstone reservoir liquid to the exploration of Tazhong Silurian [J]. Chinese Journal of Engineer Geophysics, 2017, 14 (1): 116-122.
[18] Cheng Xi, Hui Chen, Lu Yunfeng, et al. Fluid evaluation technology for reservoirs controlled by structure and lithology: Taking CHN oilfield in Ordos Basin as an example [J]. Journal of Xi'an Shiyou University (Natural Science Edition), 2017, 32 (6): 29-43.
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[20] 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.
Cite This Article
  • APA Style

    Yang Kebing, Li Shidong, Wang Huijing, Fu Kang, Pan Xuefeng, et al. (2019). Discussion on the Method of Evaluating Oil and Water Layers by Using Ratio of Deep Resistivity and Flush Zone Resistivity. International Journal of Oil, Gas and Coal Engineering, 7(1), 7-12. https://doi.org/10.11648/j.ogce.20190701.12

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    ACS Style

    Yang Kebing; Li Shidong; Wang Huijing; Fu Kang; Pan Xuefeng, et al. Discussion on the Method of Evaluating Oil and Water Layers by Using Ratio of Deep Resistivity and Flush Zone Resistivity. Int. J. Oil Gas Coal Eng. 2019, 7(1), 7-12. doi: 10.11648/j.ogce.20190701.12

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    AMA Style

    Yang Kebing, Li Shidong, Wang Huijing, Fu Kang, Pan Xuefeng, et al. Discussion on the Method of Evaluating Oil and Water Layers by Using Ratio of Deep Resistivity and Flush Zone Resistivity. Int J Oil Gas Coal Eng. 2019;7(1):7-12. doi: 10.11648/j.ogce.20190701.12

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  • @article{10.11648/j.ogce.20190701.12,
      author = {Yang Kebing and Li Shidong and Wang Huijing and Fu Kang and Pan Xuefeng and Zhang Junjie},
      title = {Discussion on the Method of Evaluating Oil and Water Layers by Using Ratio of Deep Resistivity and Flush Zone Resistivity},
      journal = {International Journal of Oil, Gas and Coal Engineering},
      volume = {7},
      number = {1},
      pages = {7-12},
      doi = {10.11648/j.ogce.20190701.12},
      url = {https://doi.org/10.11648/j.ogce.20190701.12},
      eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ogce.20190701.12},
      abstract = {The depth-shallow resistivity ratio method for the same measuring point is an important method to identify oil and water reservoirs, But its application effect in conventional logging data is not good. By studying the invasion characteristics of resistivity curves of reservoirs, the ratio of deep resistivity and flush zone resistivity at the same measuring point is used to evaluate oil and water layers with a good effect. Further research shows that the ratio of deep resistivity to flushing zone resistivity can reflect the oil-bearing property of reservoir. The fact that the ratio of deep resistivity and flush zone resistivity of water layers in the same well is basically a constant supports this view, which can be deduced from Archie's formula. That is, the ratio of deep resistivity to flushing zone resistivity is Rw/Rmf, which is the ratio of formation water resistivity to mud filtrate resistivity. On this basis, a method of evaluating oil and water reservoir by using the ratio of deep resistivity and flush zone resistivity is proposed. One is logging crossplot evaluation method, the other is apparent water saturation calculation and evaluation method. These two methods are not affected by the changes of lithology and resistivity of the reservoir, and do not need data such as porosity, rock-electro parameters and formation water resistivity, which can quickly identify oil and water layers. As the ratio between the deep resistivity and the resistivity of the flush zone is not related to the resistivity of the reservoir, it can be used to evaluate the low resistivity oil reservoir. The results show that it is effective to identify low resistivity reservoirs and it is a reliable method to evaluate low resistivity reservoirs.},
     year = {2019}
    }
    

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  • TY  - JOUR
    T1  - Discussion on the Method of Evaluating Oil and Water Layers by Using Ratio of Deep Resistivity and Flush Zone Resistivity
    AU  - Yang Kebing
    AU  - Li Shidong
    AU  - Wang Huijing
    AU  - Fu Kang
    AU  - Pan Xuefeng
    AU  - Zhang Junjie
    Y1  - 2019/01/21
    PY  - 2019
    N1  - https://doi.org/10.11648/j.ogce.20190701.12
    DO  - 10.11648/j.ogce.20190701.12
    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  - 7
    EP  - 12
    PB  - Science Publishing Group
    SN  - 2376-7677
    UR  - https://doi.org/10.11648/j.ogce.20190701.12
    AB  - The depth-shallow resistivity ratio method for the same measuring point is an important method to identify oil and water reservoirs, But its application effect in conventional logging data is not good. By studying the invasion characteristics of resistivity curves of reservoirs, the ratio of deep resistivity and flush zone resistivity at the same measuring point is used to evaluate oil and water layers with a good effect. Further research shows that the ratio of deep resistivity to flushing zone resistivity can reflect the oil-bearing property of reservoir. The fact that the ratio of deep resistivity and flush zone resistivity of water layers in the same well is basically a constant supports this view, which can be deduced from Archie's formula. That is, the ratio of deep resistivity to flushing zone resistivity is Rw/Rmf, which is the ratio of formation water resistivity to mud filtrate resistivity. On this basis, a method of evaluating oil and water reservoir by using the ratio of deep resistivity and flush zone resistivity is proposed. One is logging crossplot evaluation method, the other is apparent water saturation calculation and evaluation method. These two methods are not affected by the changes of lithology and resistivity of the reservoir, and do not need data such as porosity, rock-electro parameters and formation water resistivity, which can quickly identify oil and water layers. As the ratio between the deep resistivity and the resistivity of the flush zone is not related to the resistivity of the reservoir, it can be used to evaluate the low resistivity oil reservoir. The results show that it is effective to identify low resistivity reservoirs and it is a reliable method to evaluate low resistivity reservoirs.
    VL  - 7
    IS  - 1
    ER  - 

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Author Information
  • Petro China Huabei Oilfield Company, Renqiu, China

  • Petro China Huabei Oilfield Company, Renqiu, China

  • Petro China Huabei Oilfield Company, Renqiu, China

  • Petro China Huabei Oilfield Company, Renqiu, China

  • Petro China Huabei Oilfield Company, Renqiu, China

  • Petro China Huabei Oilfield Company, Renqiu, China

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