Affiliation:
1. Shale Gas Research Institute of PetroChina Southwest Oil and Gas Company, Sichuan, China
2. SLB
Abstract
Abstract
Due to the reservoir complexity that includes natural fractures and weak bedding planes, over 30% of China shale gas wells in Sichuan Basin encountered casing deformation issues. Casing deformation resulted in huge challenges for wellbore accessibility and prevented setting of bridge plugs of the subsequent stages at the originally designed depth. To avoid leaving the target lateral unstimulated after casing deformation incidents, operators would have to perforate the entire remaining lateral and conduct multiple fracturing treatments with diversions; however, high uncertainty in such practice risks under-stimulation or overstimulation.
In this study, we share several field cases that utilized high-frequency pressure monitoring (HFPM) to evaluate and improve stimulation effectiveness in wells with casing deformation. The detailed operational procedure and initial findings from comparison between HFPM diagnosis and results from other monitoring techniques, such as seismic monitoring and downhole camera, are also discussed. Observations, limitations, and potential improvements from these cases demonstrate a potentially duplicatable practice for stimulation in wells with casing deformation.
Reference5 articles.
1. Han, L., Yang, S., Dai, L.et al.
2023. Casing Deformation and Controlling Methods During Hydraulic Fracturing Shale Gas Reservoirs in China: What We Known and Tried. Paper presented at the SPE Oklahoma City Oil and Gas Symposium, Oklahoma City, Oklahoma, USA, 17-19 April. SPE-213072-MS. https://doi.org/10.2118/213072-MS.
2. Liu, Y,, Kalinin, D., Li, D.et al.
2019. Understanding the Complexity of Fracturing in the Sichuan Shale Gas Reservoir in China. Paper presented at the SPE/AAPG/SEG Asia Pacific Unconventional Resources Technology Conference, Brisbane, Australia, 18-November. URTEC-198248-MS. https://doi.org/10.15530/AP-URTEC-2019-198248.
3. Panjaitan, M. L., Moriyama, A., McMillan, D.et al.
2018. Qualifying Diversion in Multi Clusters Horizontal Well Hydraulic Fracturing in Haynesville Shale Using Water Hammer Analysis, Step-Down Test and Microseismic Data. Paper presented at the SPE Hydraulic Fracturing Technology Conference and Exhibition, The Woodlands, Texas, USA, 23–25 January. SPE-189850-MS. https://doi.org/10.2118/189850-MS.
4. Shan, Y., Zeng, B., Roberts, G.et al.
2022. Frac Optimization by Sand Entry Distribution. Paper presented at the SPE Annual Technical Conference and Exhibition, Houston, Texas, USA, 3-October. SPE-209976-MS. https://doi.org/10.2118/209976-MS.
5. Zeng, B., Zhang, H., Zhou, X.et al.
2021. Microseismic Characteristics of Shale Gas Wells With Casing Deformation in Sichuan Basin. Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, virtual, 18-25 June. ARMA-2021-1825/
Cited by
3 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献