DOI: 10.1306/02221110094
Scopus记录号: 2-s2.0-80052468119
论文题名: Overpressure and mudrock compaction in the Lower Kutai Basin, Indonesia: A radical reappraisal
作者: Ramdhan A.M. ; Goulty N.R.
刊名: AAPG Bulletin
ISSN: 0149-1824
EISSN: 1558-9554
出版年: 2011
发表日期: 2011
卷: 95, 期: 10 起始页码: 1725
结束页码: 1744
语种: 英语
Scopus关键词: Burial depths
; Compaction curves
; Density log
; Depth range
; Effective stress
; Gas generation
; High temperature
; Indonesia
; Lateral drainage
; Miocene
; Mudrocks
; Neo genes
; Over-pressures
; Overpressure
; Porosity reduction
; Resistivity logs
; Smectites
; Temperature range
; Transition zones
; Unloading process
; Vitrinite reflectance
; Catchments
; Clay minerals
; Electric logging
; Radioactivity logging
; Wells
; Compaction
; compaction
; density dependence
; high temperature
; mudstone
; Neogene
; overpressure
; porosity
; radical
; reflectance
; smectite
; succession
; transition zone
; unloading
; vitrinite
; Borneo
; Indonesia
; Kutei Basin
; Makassar Strait
Scopus学科分类: Energy
; Earth and Planetary Sciences
英文摘要: Lateral drainage and high temperatures in the shelfal area of the Lower Kutai Basin provide an exceptional opportunity to study compaction of Miocene mudrocks and overpressure generation. Previous workers agreed that the principal mechanism of overpressure generation is disequilibrium compaction, but sonic and resistivity logs in several fields display reversals at a transition zone into high overpressure, indicating that overpressure is generated by unloading processes. The transition zone coincides with the vitrinite reflectance threshold for gas generation. Extreme overpressures in some wells are associated with reversals on density logs too, interpreted to result from opening cracks. The density-depth trends through the mudrocks are similar in all wells and independent of overpressure until extreme overpressures are encountered. This observation strongly suggests that porosity reduction is controlled by chemical compaction and that cementation has caused the mudrocks to become overcompacted, relative to the prevailing effective stress, at burial depths of approximately 3 km (1.9 mi] where the top of overpressure is encountered. Hence, the Lower Kutai Basin contains a unique reported example, to date, of a Neogene succession in which high overpressures are generated by unloading processes with no contribution from disequilibrium compaction. Density logs from the Peciko field have been used to derive the empirical porosity-depth trend 0 = 0.434e -0164z for mudrocks in the depth range 6000 to 15,000 ft (1800 to 4600 m], where z is depth in thousands of feet. The corresponding temperature range is 85 to 170 °C, so this compaction curve applies for mudrocks in the chemical compaction regime, where no discrete smectite is present. Copyright © 2011. The American Association of Petroleum Geologists. All rights reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-80052468119&doi=10.1306%2f02221110094&partnerID=40&md5=e61565c4d38f69c4dfddb9cf4b78796c
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/13393
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
There are no files associated with this item.
Recommended Citation:
Ramdhan A.M.,Goulty N.R.. Overpressure and mudrock compaction in the Lower Kutai Basin, Indonesia: A radical reappraisal[J]. AAPG Bulletin,2011-01-01,95(10)