...). The relations between E, UCS and failure angle with temperature were obtained in anhydrite and marl. To analyze whether the anhydrite/marl interface in well 42 was prone to failure because of depletion and ensuing reservoir compaction, numerical modeling reproducing triaxial laboratory testing was carried out...

... to separate these effects, estimate their individual contribution, and initial results. For a pressure decrease from 6.2 to. 69 MPa (900 to 100 psi), the permeability of coal increased by 12 times due to volumetric strain effect, and 5 times due to gas slippage effect Change in permeability with gas depletion...

... of those achieved in the field. In a sandstone of moderate strength, uncased mainbore and laterals (Levell) are predicted to be stable for the anticipated reservoir depletion .. Sta- bility of Level 2 multilaterals (cased mainbore, uncased lateral) in a weaker sandstone was shown to be dependent...