Analysis of Fracture Porosity of Coalbed with NMR Experiments and Resistivity Logging Data
- https://doi.org/10.2991/epee-16.2016.51How to use a DOI?
- coal bed; porosity; NMR experiment; resistivity
Coal bed methane(CBM) exists in the pore of coal, and the fracture of the coal seam also provides the seepage path for mining. The correct evaluation of the pore is the key to the exploration and development of coalbed methane, which is also a difficult point. In this paper, we use NMR experiments to accurately evaluate the pore structure of coal seams, and got the fracture porosity of coal seam. Because the method of NMR experiment to obtain porosity is one-sided, and its cost is also very expensive. Therefore, this paper puts forward using resistivity logging data to calculate the fracture porosity of coal seam, and then use the NMR data to correct the porosity of the resistivity calculation, Finally, we obtained the method to effectively evaluate the fracture porosity of coal seam by electrical resistivity method. At the same time, we also evaluated that whether the Archie is applicable in the coal seam. The results showed that the T2 chart of the area clearly showed two peaks, and the matrix pores accounted for more than 85% of the total porosity. And the porosity calculated by Archie method largely reflects the fracture porosity of coalbed.
- © 2016, the Authors. Published by Atlantis Press.
- Open Access
- This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).
Cite this article
TY - CONF AU - Mingshun Zhou AU - Xiao Liang AU - Lin Ai AU - Diren Liu PY - 2016/10 DA - 2016/10 TI - Analysis of Fracture Porosity of Coalbed with NMR Experiments and Resistivity Logging Data BT - Proceedings of the 2016 International Conference on Energy, Power and Electrical Engineering PB - Atlantis Press SP - 228 EP - 231 SN - 2352-5401 UR - https://doi.org/10.2991/epee-16.2016.51 DO - https://doi.org/10.2991/epee-16.2016.51 ID - Zhou2016/10 ER -