The purpose of this project is to implement a pore pressure and fracture gradient prediction strategy for the North Sea Central (Judy and Jade) fields. Measured porosity and pressure data of Judy and Jade fields will be studied and reviewed. This strategy will help to safe drilling, design and completion operations for future wells in these areas. Judy and Jade field’s data will examine and review on two pore pressure prediction models and one fracture gradient prediction model. The pore pressure prediction from porosity model was examined primarily in this project to predict the pore pressure and pore pressure gradient. This was new theoretical model of pore pressure prediction, utilizes porosity to predicting the pore pressure. The pore pressure prediction from porosity model is allowing normal compaction trendline of porosity to predict the pore pressure. The Tau model was examined secondarily in this project to predict the pore pressure and pore pressure gradient. This model was derived based on interval velocity and transit time data. Tau model was proposed by Shell, this method dependent on velocity to predict the pore pressure. In this project, the fracture pressure and fracture gradient prediction was done based on Kirsch’s solution. The data required for this prediction strategy is overburden stress of formation, pore pressure and Poisson’s ratio. Generally, minimum stress method and tensile failure methods were used in drilling industry. Kirsch’s solution comes under tensile failure method, this prediction strategy delivered simple and accurate results to estimate the fracture pressure gradient. The two pore pressure prediction strategies examined on available data, that two model pore pressure gradient results compared with the available pore pressure gradient data. Ultimately, Tau model based pore pressure prediction strategy delivered best results. Thus, the Tau model based pore pressure prediction strategy was preferred for future operations in Judy and Jade fields.

TITLE - THE IMPLEMENTATION OF A PORE PRESSURE AND FRACTURE GRADIENT PREDICTION MODEL FOR THE NORTH SEA CENTRAL JUDY AND JADE FIELDS
AUTHOR - Jagadeesh Kilaparthi
••••••IJSER Edition - March 2014

UNIVERSITY - Coventry University
GUIDE NAME -
Ndubuisi Okereke