At present,the mechanism research on glacial lake outburst mainly focuses on the ice quake and ice landslide,etc. To some glacial lakes,the seepage deformation is the dominant factor in outburst process. Taking the Yi...At present,the mechanism research on glacial lake outburst mainly focuses on the ice quake and ice landslide,etc. To some glacial lakes,the seepage deformation is the dominant factor in outburst process. Taking the Yindapu Glacial Lake in Tibet as an example,using SEEP/W module of FEM software (GEO-STUDIO),the authors analyzed seepage stability of terminal moraine ridge dam. The leading role of seepage deformation in some glacial lake outburst mechanism is proposed and proved.展开更多
The data of modified isochronal testing of gas well is just used to calculate gas well deliverability. Fully utilizing well test data make it possible to obtain formation parameters, such as gas well deliverability, e...The data of modified isochronal testing of gas well is just used to calculate gas well deliverability. Fully utilizing well test data make it possible to obtain formation parameters, such as gas well deliverability, effective permeability and skin factor at the same time. Based on transient flow theory, the pressure drawdown equation of gas unsteady seepage can be deducted. One simulated case is used to illustrate the applicability of the proposed method. The result of analyzed case shows that the proposed method can provide accurate estimate of formation permeability and skin factor compared with the method of Homer curves.展开更多
基金Project supported by China Geological Survey (No.1012010640702)
文摘At present,the mechanism research on glacial lake outburst mainly focuses on the ice quake and ice landslide,etc. To some glacial lakes,the seepage deformation is the dominant factor in outburst process. Taking the Yindapu Glacial Lake in Tibet as an example,using SEEP/W module of FEM software (GEO-STUDIO),the authors analyzed seepage stability of terminal moraine ridge dam. The leading role of seepage deformation in some glacial lake outburst mechanism is proposed and proved.
文摘The data of modified isochronal testing of gas well is just used to calculate gas well deliverability. Fully utilizing well test data make it possible to obtain formation parameters, such as gas well deliverability, effective permeability and skin factor at the same time. Based on transient flow theory, the pressure drawdown equation of gas unsteady seepage can be deducted. One simulated case is used to illustrate the applicability of the proposed method. The result of analyzed case shows that the proposed method can provide accurate estimate of formation permeability and skin factor compared with the method of Homer curves.