Normal Resistivity Trends for Geopressure Analysis in Mexican Offshore Wells

摘要

The normal compaction trend and the pore pressure gradient play a very important role in oil wells design for drilling operations. It is essential understand the physical principles originating these pressures and evaluate the models of quantification for a particular gepgraphycal area. In this paper, we show the results from our analysis of geopressures in 11 (eleven) offshore wells drilled in the Offshore Area in Gulf of Mexico from PEMEX, Our work focuses in the normal compaction trends using curves of Resistivity Logs. Moreover, the Eaton's model was regionalized in order to defining the magnitude of the pore pressure with high precision. From those results we inferred that the accuracy of the predictions depends of slope from normal compactions trend. Finally, using the profiles of real pressure data, we built a "Pore Pressure Cube" for the area of study, which simplifies the quantifications of pressures during the process of planning and design of the wells.