Using Modified d-exponent Method and Equivalent Depth to predict Abnormal pressure zones in oil wells in Amara Oilfield (Southeast Iraq).

Abstract

Reduction in drilling problems particularly those associated with drilling costs can be achieved, to a certain degree, by an early determination of abnormal permeability pressures The prediction of these pressures and fractures degree can be used to define the limit of protective curtain of the drilling boreholes for petroleum purposes.
oil In the present study, two boreholes (A1 and A2) have been selected from Amara
field, southern Iraq to define the regions of abnormal pressure by using two methods.
These methods are the modified d-exponent method and equivalent depth method.
These methods are depending on acoustic logging data. Both of them gave coincident results and this may reflect the good accuracy of these methods in determining zones
of abnormal pressures using acoustic or sonic logging data.