... Wellbore Design drilling fluid mud pressure Reservoir Characterization shallow sediment high mud pressure wellbore integrity pore pressure isrm international symposium Upstream Oil & Gas inward displacement asian rock mechanics symposium 29 Drilling plastic deformation wellbore...

.... The result shows that the hydration swelling has a great influence on the stress intensity factor, the drilling fluid systems need to decrease the drilling fluid filter loss and increase the clay minerals hydrate inhibitor. The wetting behavior has a great influence on the wellbore stability, the drilling...

..., the capillary pressure of shale will be very high. (3) Carbonaceous shale has a mass of micro-cracks, micro-pores and bedding planes by scanning electron microscopy (SEM). The drilling fluid is easy to enter into the interior of the rock under the action of the pressure of the fluid column, the chemical...

... to the industry around 500 million USD/year [1]. The petroleum industry is developing a considerable effort to the understanding of the mechanisms causing lost of productivity and wellbore instability problems. Some of these problems are directly related to the interaction between drilling fluids and shales...

... by the drilling environment. However, drilling equipments are modifiable variants that can be predicted or optimized according to conditions such as bit type, applied force on bit, rate of rotation and volume of drilling fluid [7]. Among conducted studies on drillability, Wilbur's classification system (1982...