alexa Application of Seismic Frequency Based Pore Pressure Prediction in Well Design: Review of an Integrated Well Design Approach in Deep Water Gulf of Mexico
ISSN: 2381-8719

Journal of Geology & Geophysics
Open Access

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Research Article

Application of Seismic Frequency Based Pore Pressure Prediction in Well Design: Review of an Integrated Well Design Approach in Deep Water Gulf of Mexico

Saeed Salehi* and Tim Mannon
University of Louisiana at Lafayette, USA
*Corresponding Author : Saeed Salehi
Assistant Professor
University of Louisiana at Lafayette, USA
E-mail: [email protected]
Received July 19, 2013; Accepted August 16, 2013; Published August 20, 2013
Citation: Salehi S, Mannon T (2013) Application of Seismic Frequency Based Pore Pressure Prediction in Well Design: Review of an Integrated Well Design Approach in Deep Water Gulf of Mexico. J Geol Geosci 2:125. doi:10.4172/2329-6755.1000125
Copyright: © 2013 Salehi S, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
 

Abstract

Improving well design has and always will be the primary goal in drilling operations in the oil and gas industry. To address this issue, an analysis of wellbore stability and well design improvement has been conducted. This study will show a systematic approach to well design by focusing on best practices for mud weight window projection for a field in Mississippi Canyon, Gulf of Mexico. The field includes depleted reservoirs and is in close proximity of salt intrusions. Analysis of offset wells has been conducted in the interest of developing an accurate picture of the subsurface environment by making connections between depth, Non-Productive Time (NPT) events, and mud weights used. Commonly practiced petro physical methods of pore pressure, fracture pressure, and shear failure gradient prediction have been applied to key offset wells in order to enhance the well design for a proposed well. For the first time in the literature, the accuracy of the commonly accepted, seismic interval velocity based and the relatively new, seismic frequency based methodologies for pore pressure prediction are compared. Each of these methods is compared to the petro physically derived mud weight windows for the key offset wells and the proposed well in this field, showing higher reliability in the frequency based approach. Additionally, the interval velocity method yielded erroneous results in a fast-rock-velocity channel zone and the near salt proximity environments, whereas the frequency Based method appeared unaffected by either of these factors.

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