PhD thesis entitled 3D geological model for the Mishref Formation in Zubair field, southern Iraq. Hold at the College of Science, Geology Department. The presenter Maysaa khalid Raheem demonstrates the most important objectives of studying the post deposition diagenetic changes and their effects on the petrophysical properties and building a 3D geological model using the Petrel program (2018)) to know the distribution of petrophysical properties and the horizontal and vertical variance within the formation