eprintid: 5733
rev_number: 2
eprint_status: archive
userid: 1
dir: disk0/00/00/57/33
datestamp: 2023-11-09 16:17:28
lastmod: 2023-11-09 16:17:28
status_changed: 2023-11-09 16:03:43
type: article
metadata_visibility: show
creators_name: Satti, I.A.
creators_name: Ghosh, D.
creators_name: Wan Yusoff, W.I.
title: 3-D predrill overpressure prediction using prestack depth-migrated seismic velocity in a field of southwestern Malay Basin
ispublished: pub
keywords: anisotropy; compaction; drilling; geothermal gradient; heat flow; overpressure; permeability; pore pressure; prediction; prestack migration; quantitative analysis; seismic velocity; shale; vertical distribution, Malay Basin; Pacific Ocean; South China Sea, Calluna vulgaris
note: cited By 5
abstract: Quantitative predrill pore pressure prediction is very important for reducing the drilling hazards. In many Tertiary basins, generation of overpressure is mainly by compaction disequilibrium due to high deposition rate and low permeability in shale. In the Malay Basin, high geothermal gradient (i.e., 40�60 °C/km) and high heat flow also play an important role in generating overpressure at shallow depth. This study describes the utilization of 3-D prestack depth-migrated seismic interval velocity for predrill pore pressure prediction in a field of southwestern Malay Basin. The quality of 3-D prestack depth-migrated seismic interval velocity was enhanced by calibration with check-shot data. Modified Gardner�s equation was used to generate the 3-D density cube from the interval velocity. The Eaton and Bowers methods were used to compute and predict pore pressure values from the seismic velocity. The Eaton method with standard exponent for seismic velocity gave good prediction in the shallower zone where overpressure is caused by undercompaction mechanism, whereas underpredicted the high pore pressure at the greater depth where fluid expansion is the cause of overpressure. However, the overpressures were predicted quite well by applying correction on the Eaton method for fluid expansion mechanism. © 2014, Saudi Society for Geosciences.
date: 2015
publisher: Springer Verlag
official_url: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84940437255&doi=10.1007%2fs12517-014-1734-y&partnerID=40&md5=9385412fddcd48d46ad406f9c993bbcc
id_number: 10.1007/s12517-014-1734-y
full_text_status: none
publication: Arabian Journal of Geosciences
volume: 8
number: 9
pagerange: 7387-7398
refereed: TRUE
issn: 18667511
citation:   Satti, I.A. and Ghosh, D. and Wan Yusoff, W.I.  (2015) 3-D predrill overpressure prediction using prestack depth-migrated seismic velocity in a field of southwestern Malay Basin.  Arabian Journal of Geosciences, 8 (9).  pp. 7387-7398.  ISSN 18667511