| DOI: | 10.1306/06251312156
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| Scopus记录号: | 2-s2.0-84896807423
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| 论文题名: | Subsalt pressure prediction in the Miocene Mad Dog field, Gulf of Mexico |
| 作者: | Merrell M.P.; Flemings P.B.; Bowers G.L.
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| 刊名: | AAPG Bulletin
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| ISSN: | 0149-1531
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| EISSN: | 1558-9261
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| 出版年: | 2014
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| 发表日期: | 2014
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| 卷: | 98, 期:2 | | 起始页码: | 315
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| 结束页码: | 340
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| 语种: | 英语
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| Scopus关键词: | Borehole pressure
; Effective stress
; Gulf of Mexico
; Hydrostatic gradients
; Lost circulation
; Pressure predictions
; Sonic velocity
; Vertical stress
; Pore pressure
; Porosity
; Sandstone
; Rocks
; bathymetry
; borehole
; circulation
; effective stress
; Miocene
; mudstone
; pore pressure
; porosity
; reservoir
; sandstone
; Atlantic Ocean
; Gulf of Mexico
; Canis familiaris
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| Scopus学科分类: | Energy
; Earth and Planetary Sciences
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| 英文摘要: | Sandstone pressures follow the hydrostatic gradient in Miocene strata of the Mad Dog field, deep-water Gulf of Mexico, whereas pore pressures in the adjacent mudstones track a trend from well to well that can be approximated by the total vertical stress gradient. The sandstone pressures within these strata are everywhere less than the bounding mudstone pore pressures, and the difference between them is proportional to the total vertical stress. The mudstone pressure is predicted from its porosity with an exponential porosity-versus-vertical effective stress relationship, where porosity is interpreted from wireline velocity. Sonic velocities in mudstones bounding the regional sandstones fall within a narrow range throughout the field from which we interpret their vertical effective stresses can be approximated as constant. We show how to predict sandstone and mudstone pore pressure in any offset well at Mad Dog given knowledge of the local total vertical stress. At Mad Dog, the approach is complicated by the extraordinary lateral changes in total vertical stress that are caused by changing bathymetry and the presence or absence of salt. A similar approach can be used in other subsalt fields. We suggest that pore pressures within mudstones can be systematically different from those of the nearby sandstones, and that this difference can be predicted. Well programs must ensure that the borehole pressure is not too low, which results in borehole closure in the mudstone intervals, and not too high, which can result in lost circulation to the reservoir intervals. Copyright ©2014. The American Association of Petroleum Geologists. All rights reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84896807423&doi=10.1306%2f06251312156&partnerID=40&md5=198b0dc44917240cdde1f516356c4a82
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/13102
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| 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: | |
Merrell M.P.,Flemings P.B.,Bowers G.L.. Subsalt pressure prediction in the Miocene Mad Dog field, Gulf of Mexico[J]. AAPG Bulletin,2014-01-01,98(2)
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