Plugging technology is one of the leading problems in shale gas drilling engineering,as it causes wellbore stability,shale formation collapse,and so on.In order to solve these problems,in this paper,we committed to pr...Plugging technology is one of the leading problems in shale gas drilling engineering,as it causes wellbore stability,shale formation collapse,and so on.In order to solve these problems,in this paper,we committed to preparing artificial cores whose original permeability was 1.16×10^(−4)mD,which could be used to simulate the shale formation,and established a sealing evaluation method to assess the effect of plugging technology by measuring permeability reduction rate K'.Verified the good reproducibility of the artificial cores through a lot of high temperature and high pressure(HTHP)filtration experiments.The Scanning electron microscopy(SEM)was used to prove that the permeability reduction rate is a scientific method to evaluate the sealing effect.展开更多
基金All work was supported by Open Fund(PLN201905)of State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation(Southwest Petroleum University)The Natural Science Foundation of China(No.51702270)PetroChina Innovation Foundation(No:2018D-5007-0604).
文摘Plugging technology is one of the leading problems in shale gas drilling engineering,as it causes wellbore stability,shale formation collapse,and so on.In order to solve these problems,in this paper,we committed to preparing artificial cores whose original permeability was 1.16×10^(−4)mD,which could be used to simulate the shale formation,and established a sealing evaluation method to assess the effect of plugging technology by measuring permeability reduction rate K'.Verified the good reproducibility of the artificial cores through a lot of high temperature and high pressure(HTHP)filtration experiments.The Scanning electron microscopy(SEM)was used to prove that the permeability reduction rate is a scientific method to evaluate the sealing effect.
