DOI: 10.1306/07221413148
Scopus记录号: 2-s2.0-84923963733
论文题名: The pore pressure regime of the northern Gulf of Mexico: Geostatistical estimation and regional controls
作者: Morris S. ; Vestal B. ; O'Neill K. ; Moretti M. ; Franco C. ; Hitchings N. ; Zhang J. ; Grace J.D.
刊名: AAPG Bulletin
ISSN: 0149-1481
EISSN: 1558-9211
出版年: 2015
发表日期: 2015
卷: 99, 期: 1 起始页码: 91
结束页码: 118
语种: 英语
Scopus关键词: Drilling fluids
; Hydrocarbons
; Hydrostatic pressure
; Pore pressure
; Pressure gradient
; Confidence interval
; Geostatistical estimation
; Hydrocarbon reservoir
; Northern Gulf of Mexico
; Safety and efficiencies
; Sedimentation rates
; Subsurface pressure
; Vertical transitions
; Uncertainty analysis
; confidence interval
; drilling fluid
; geostatistics
; hydrocarbon entrapment
; hydrocarbon reservoir
; hydrostatic pressure
; kriging
; pore pressure
; pressure field
; pressure gradient
; safety
; salt tectonics
; threshold
; uncertainty analysis
; Atlantic Ocean
; Gulf of Mexico
; Louisiana
; Texas
; United States
Scopus学科分类: Energy
; Earth and Planetary Sciences
英文摘要: Subsurface pressures strongly influence the migration and trapping of hydrocarbons and impact the safety and efficiency of drilling operations. The pore pressure field of the northern Gulf of Mexico (GOM) was analyzed at 1000-ft (305-m) depth intervals from 2500 to 17,500 ft (762 to 5334 m) below the sea floor. Two variables were mapped: 12,976 initial hydrocarbon reservoir pressure gradient values and 43,276 observations on drilling fluid (mud) weight. Because of the acute importance of assessing estimate uncertainty, ordinary kriging was employed, providing explicit evaluations of confidence surrounding mapped values. Expected values and confidence intervals for the distribution of both variables were estimated by 9 mi2 (23.3 km2) grid cells across the GOM for each of the 15 depth intervals. Estimation variances were also used to clip each map to specific extents, within which a uniform minimum threshold of certainty was exceeded. Characteristic of young basins with high sedimentation rates, mean pore pressure exceeded hydrostatic pressure throughout the GOM. Four provinces of internally consistent pressure regimes were defined: three south of Louisiana and one off the Texas coast. They reflect geologic controls on pressure arising from regional patterns of sedimentation and the resultant timing and geometry of salt tectonism. One GOM-wide (shallow) vertical transition in the pressure field was found in the mud weight data, and a second vertical transition (deep) occurred in both variables. Hot spot analysis was also applied to identify specific contiguous areas of abnormally high or low rates of change in pressure gradient and mud weight between depth-adjacent intervals. Copyright ©2015. The American Association of Petroleum Geologists. All rights reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84923963733&doi=10.1306%2f07221413148&partnerID=40&md5=0428b1304bb89c071aa4e2be2d9ac4f7
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/13052
Appears in Collections: 过去全球变化的重建 影响、适应和脆弱性 科学计划与规划 气候变化与战略 全球变化的国际研究计划 气候减缓与适应 气候变化事实与影响
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Recommended Citation:
Morris S.,Vestal B.,O'Neill K.,et al. The pore pressure regime of the northern Gulf of Mexico: Geostatistical estimation and regional controls[J]. AAPG Bulletin,2015-01-01,99(1)