TY  - JOUR
AU  - Li, Kui
AU  - Gong, Li
AU  - Yang, Chao
AU  - Hu, Xiaokui
AU  - Yang, Ye
PY  - 2026
DA  - 2026/08/07
TI  - Displacement and Pressure Control for Reaming of Blocked Horizontal Shale Gas Wells
JO  - Journal of Geo-Energy and Environment
T2  - Journal of Geo-Energy and Environment
JF  - Journal of Geo-Energy and Environment
VL  - 2
IS  - 4
SP  - 265
EP  - 275
DO  - 10.62762/JGEE.2026.569527
UR  - https://www.icck.org/article/abs/JGEE.2026.569527
KW  - hongxing block
KW  - reaming
KW  - segmented circulation
KW  - annular pressure buildup
KW  - horizontal well
AB  - Shale gas horizontal wells in the Hongxing Block are challenged by long horizontal sections, narrow annular clearances, well-developed fractures, and the coexistence of lost circulation and wellbore collapse. Complexities such as pipe sticking, pump surging, annular blockage, and cuttings accumulation frequently occur during reaming, severely affecting operational safety and efficiency. To overcome the drawbacks of conventional empirical methods, this paper establishes four quantitative models: displacement-pressure coupling, bottomhole Equivalent Circulating Density (ECD) constraint, critical cuttings transport displacement, and drill string safety loading. An integrated reaming technology involving staged displacement, closed-loop emergency treatment, bi-directional reaming, and segmented circulation is then developed. Field application in Well Hong 3-5HF and multi-well verification demonstrate that the proposed method reduces the reaming complication rate from 15% to below 6.2% and achieves a 100% one-trip success rate in the three application wells tested in this study. This work provides a standardized technical solution for safe and efficient reaming in the Hongxing Block and similar shale gas fields.
SN  - 3069-3268
PB  - Institute of Central Computation and Knowledge
LA  - English
ER  - 

@article{Li2026Displaceme,
  author = {Kui Li and Li Gong and Chao Yang and Xiaokui Hu and Ye Yang},
  title = {Displacement and Pressure Control for Reaming of Blocked Horizontal Shale Gas Wells},
  journal = {Journal of Geo-Energy and Environment},
  year = {2026},
  volume = {2},
  number = {4},
  pages = {265-275},
  doi = {10.62762/JGEE.2026.569527},
  url = {https://www.icck.org/article/abs/JGEE.2026.569527},
  abstract = {Shale gas horizontal wells in the Hongxing Block are challenged by long horizontal sections, narrow annular clearances, well-developed fractures, and the coexistence of lost circulation and wellbore collapse. Complexities such as pipe sticking, pump surging, annular blockage, and cuttings accumulation frequently occur during reaming, severely affecting operational safety and efficiency. To overcome the drawbacks of conventional empirical methods, this paper establishes four quantitative models: displacement-pressure coupling, bottomhole Equivalent Circulating Density (ECD) constraint, critical cuttings transport displacement, and drill string safety loading. An integrated reaming technology involving staged displacement, closed-loop emergency treatment, bi-directional reaming, and segmented circulation is then developed. Field application in Well Hong 3-5HF and multi-well verification demonstrate that the proposed method reduces the reaming complication rate from 15\% to below 6.2\% and achieves a 100\% one-trip success rate in the three application wells tested in this study. This work provides a standardized technical solution for safe and efficient reaming in the Hongxing Block and similar shale gas fields.},
  keywords = {hongxing block, reaming, segmented circulation, annular pressure buildup, horizontal well},
  issn = {3069-3268},
  publisher = {Institute of Central Computation and Knowledge}
}