دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

a natural fracture along the cleat plane, usually parallel to max stress. Often extensive, especially in thin beds.

opening up secondary natural fractures that may be orthogonal to the planar fracture. Also – networked fractures and shear fracturing.

a rock with a higher permeability along a given plane, usually created by natural fracture development, water flow that leaches the pores, depositional environment or localized reworking of the sediments.

the porosity attributed to the natural fractures, commonly less than 2 to 4%.

n: a fracture in a formation caused by artificial outside forces. The opposite of a natural fracture.

n: in the process of drilling when the difference of pressure that the fluid and the layer pore exceeds the plus of rocky compressive resistance and compressive stress,it leads to crack the layer and conform a lot of fractures. The fractures of which calle

n: the open fracture that caused by the crust movation and mountain building. When meet this kinds of fracture layer, it is very easy to circulation loss.



a fracture in the rock created by geologic events such as uplift.

opening up secondary natural fractures that may be orthogonal to the planar fracture.

n: a hindrance to movement of fluids within the formation rock of a reservoir. Permeability barriers include obvious problems, such as shale lenses and calcite or clay deposits, and less obvious ones, such as porosity changes.

n: packed bed that surrounded permeable bed, it is impervious bed or poor permeable bed.




a barrier to movement of a fluid through the rock. This may be a change in the rock where the pores are no longer connected or even present, or secondary mineral growth that filling in the pore throats and natural fractures. In one sense, a permeability b

modifications to the character of the rock through the matrix or natural fractures, where the permeability is a function of the pressure applied to the rock through fluid pressure or earth stresses.

natural fractures oriented along the same plane as the preferred fracture direction, i.e., perpendicular to minimum principle stress.