A New Calculation Method for Micro-hole Collapse Pressure of Shale Gas Reservoirs in Thrust Fault
With the ever increasing energy demands, unconventional gas becomes the new force in energy field.However, shale gas horizontal drillings are prone to instability problems because of the brittleness of gas shale.The casing programs of shale gas wells in China and North America demonstrate that the more drilling problems are encountered with the larger borehole sizes.In the thrust faults, based on vutukuris size effect theory and Mclamores failure criteria, a new prediction model of collapse pressure in transversely isotropic rock mass is proposed to analyze the critical mud weight of micro-hole in gas shale formations.The trajectory sensitivity analysis is also carried out.The results show that micro-hole drilling technique in thrust faults can significantly reduce the collapse pressure of directional wells by 12% approximately.
shale-gas reservoir drilling engineering micro-hole collapse pressure size effect
Junliang Yuan Jingen Deng Qiang Tan Lianbo Hu
State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum,Beijing 102249, China
国际会议
湖北荆州
英文
410-413
2013-05-18（万方平台首次上网日期，不代表论文的发表时间）