Determination of principal stress using six-arm caliper tool in Azadegan oil field

Elongation of borehole breakouts is in a special direction. Flaking fragments of well bores are formed by in a direction parallel to the minimum horizontal stress. Borehole failure occurs along intersecting shear fractures generated soon during drilling and progresses with time (Bell, 1990). The identification and analysis of borehole breakouts as a technique for in-situ measurement of stress orientation and magnitude, and for identifying orientation of both naturally occurring and induced fractures have received a great deal of attention among investigators. Knowledge of the orientation of horizontal earth stresses derived from analysis of borehole breakouts is important to the following areas of study: reservoir applications planning, hydrocarbon exploration, hydraulic fracturing, production strategies, etc.

کلیدواژه ها:

In-situ stress orientation ، Six-arm caliper ، Breakout ، Azadegan oil field