Abstract:
Reduction of drilling problems particularly those associated with drilling costs can be achieved, to a certain degree, by an early determination of pore pressures , The prediction of these pressures and fractures degree can be used to chose optimum mud weight and define the limit of casing of the drilling boreholes for petroleum purposes.
In the present study , one borehole have been selected from Hamra field , south Sudan , to prediction pore pressure by using d-exponent method , this method is depending on drilling data , therefore , it is an accurate method to calculate pore pressure .
In this research the pore pressure gradient, overburden pressure gradient and fracture pressure gradient are predicted and plotted vs. Depth by (drilling data) using IP software program (Interactive Petro physics). and we benefited from the idea of Eaton in calculating the pore pressure of the formation, using the IP program to facilitate the calculation process and shorten the time and effort And we calculated the pore pressure of formations using special equations in specific depth ,We compared the results for the same depths with the results obtained from the IP program, and found convergence in the values.
