Measurement of CBM Bubble Parameters by Double-Sensor Conductivity Probe

Since the current commonly used bubble detection method cannot meet the requirements of real-time bubble detection in terms of the detection target and volume, this paper proposes a method of real-time detection of coal-bed methane (CBM) bubble parameters in a borehole with a double-sensor conductivity probe and designs the corresponding test device. The ellipsoid correction algorithm was adopted for the calculation of the bubble volume to reduce the error. Simulation test results indicated that the proposed device can quickly and reliably measure local bubble parameters, including void fraction, bubble velocity, and bubble volume. This technique can be applied to monitor the fluid parameters of different strata of main coal in CBM well simultaneously and provide a basis for the comparison of reservoir properties of different main coal seams and the effect of CBM well exploitation.

This is a preview of subscription content, access via your institution.

Fig. 1.
Fig. 2.
Fig. 3.
Fig. 4.
Fig. 5.
Fig. 6.

References

  1. 1.

    Y. Meng, D. Tang, H. Xu, et al., “Geological controls and coalhed methane production potential evaluation: A case study in Liulin area, eastern Ordos Basin, China,” J. Nat. Gas Sci. Eng., 21(12), 95-111 (2014).

    CAS  Article  Google Scholar 

  2. 2.

    Y. Li, X. Fu, Q. Li, et al., “Present situation of caolbed methane exploitation in China,” Pet. Ind. Appl, 38(4), 1-4 (2019).

    Google Scholar 

  3. 3.

    Y. Li and C. Ai, “Hydraulic fracturing fracture initiation model for a vertical CBM well,” Pet. Drill. Tech., 4, 83-90 (2015).

    Google Scholar 

  4. 4.

    Y. Zhou, X. Zhang, and B. Sun, “Method for identifying gas/liquid two-phase flow patterns using conductance probes technique and noise recognition of conductance fluctuating signals,” Chin. J. Sensor. Actuators, 21 (10), 1708-1712 (2008).

    Google Scholar 

  5. 5.

    R. Li, X. Wu, J. Li, et al., “Multi-parameter detection of two-phase fluid in coal-bed methane wells.” J. Chin. Coal Soc., 39 (9), 1862-1867 (2014).

    Google Scholar 

  6. 6.

    S. Durucan, M. Ahsan, J. Shi et al., “Two phase relative permabilities for gas and water in selected European coals,” Fuel, 134 (10), 226-236 (2014).

    CAS  Article  Google Scholar 

  7. 7.

    X. Ni, C. Zhang, Y. Wang, et al., “Prediction of coal matrix shrinkage in gas-water two-phase flow stage,” J. Chin. Coal Soc., 39 (S1), 174-178 (2014).

    Google Scholar 

  8. 8.

    C. Wu, X. Wu, G. Wen, et al., “Real-time detection on CBM bubble based on electrical conductivity,” J. Chin. Coal Soc., 40 (9), 2137-2143 (2015).

    Google Scholar 

  9. 9.

    X. Peng, X. Xie, X. Liu, et al., “Study on combined coalbed methane drainage system of multi seams in Zhijin Block, Guizhou,” Coal Sci. Technol., 44 (2), 39-44 (2016).

    Google Scholar 

  10. 10.

    L. Xu, C. Chen, J. Shao, et al., “Numerical simulation of motion behavior of single bubble rising in still water,” J. Shenyang Agric. Univ., 43 (3), 357-361 (2012).

    Google Scholar 

Download references

Author information

Affiliations

Authors

Corresponding author

Correspondence to Yuliang Zou.

Additional information

Translated from Khimiya i Tekhnologiya Topliv i Masel, No. 6, pp. 105 – 109, November – December, 2020.

Rights and permissions

Reprints and Permissions

About this article

Verify currency and authenticity via CrossMark

Cite this article

Zhu, X., Zou, Y., Wu, X. et al. Measurement of CBM Bubble Parameters by Double-Sensor Conductivity Probe. Chem Technol Fuels Oils 56, 1020–1027 (2021). https://doi.org/10.1007/s10553-021-01218-x

Download citation

Keywords

  • gas-water two-phase fluid
  • CBM
  • bubble
  • double-sensor conductivity probe
  • detection