Abstract

Prospecting in oil and gas fields characterized by risks and high costs which is strongly effective on operations and prospecting plan, so we can avoid many problems and keep the cost reduction with safely drilling a well by pre-dill pore pressure prediction which depends on maintaining the wellbore pressure between the formation pore pressure and the maximum pressure that the formation withstand without fracturing, where Pore pressure prediction improve the decision for the well design by studying the hydrocarbon traps, mapping of hydrocarbon migration pathways. Predrill pore pressure prediction allows for appropriate mud weight to be selected and drilling plan in order to design a proper casing program, so we can avoid well control events such as formation fluid kicks, loss of mud circulation and surface blowouts with the use of accurate pore pressure predictions. The paper provides an overview of Application of Interval Seismic Velocities for Pre-Drill Pore Pressure Prediction and Well design to achieve minimizing the exploration and development risks and to save drilling of expensive wells. It was found that Pore pressure prediction cube was normally compacted, or close to normally compacted.

Keywords: Pre-drill pore pressure; Interval seismic velocities; Eaton’s equation