DOI: 10.1306/08191414053
Scopus记录号: 2-s2.0-84919340840
论文题名: Control of mechanical stratigraphy on bed-restricted jointing and normal faulting: Eagle Ford Formation, south-central Texas
作者: Ferrill D.A. ; McGinnis R.N. ; Morris A.P. ; Smart K.J. ; Sickmann Z.T. ; Bentz M. ; Lehrmann D. ; Evans M.A.
刊名: AAPG Bulletin
ISSN: 0149-1605
EISSN: 1558-9335
出版年: 2014
发表日期: 2014
卷: 98, 期: 11 起始页码: 2477
结束页码: 2506
语种: 英语
Scopus关键词: Calcite
; Exploratory geochemistry
; Faulting
; Hydraulic fracturing
; Isotopes
; Mineralogy
; Stratigraphy
; Calcite precipitation
; Elevated temperature
; Liquid hydrocarbons
; Mechanical stratigraphy
; Natural fracture
; Oil and gas production
; Parallel fractures
; Two phase fluid
; Fracture
; calcareous soil
; calcite
; carbonate rock
; fluid inclusion
; hydrocarbon
; joint
; mudstone
; normal fault
; outcrop
; permeability
; shear test
; stable isotope
Scopus学科分类: Energy
; Earth and Planetary Sciences
英文摘要: Outcrops of the middle Eagle Ford Formation in south-central Texas reveal well-developed joint networks in subhorizontal competent carbonate (chalk) beds and less well developed networks in interlayered incompetent calcareous mudrock beds. Northeaststriking bed-perpendicular joints in competent beds have the longest trace lengths and are abutted by northwest-striking joints. All observed joints terminate vertically in incompetent beds. Normal faults are common but less abundant than joints; dominantly dip north, northwest, or southeast; and are abutted by the joint sets and, thus, predated jointing. The faults cut multiple competent and incompetent beds, providing vertical connectivity across mechanical layering. Products of hybrid and shear failure, the dip of these faults is steep through competent beds and moderate through incompetent beds, resulting in refracted fault profiles with dilation and calcite precipitation along steep segments. Fluid inclusions in fault zone calcite commonly contain liquid hydrocarbons. Rare two-phase fluid inclusions homogenized between about (1) 40 and 58°C, and (2) 90 and 100°C, suggesting trapping of aqueous fluids at elevated temperatures and depths on the order of 2 km (6562 ft). Fluid inclusion and stable isotope geochemistry analyses suggest that faults transmitted externally derived fluids. These faults likely formed at depths equivalent to portions of the present-day oil and gas production from the Eagle Ford play in south Texas. Faults connect across layering and provide pathways for vertical fluid movement within the Eagle Ford Formation, in contrast to vertically restricted joints that produce bed-parallel fracture permeability. These observations elucidate natural fractures and induced hydraulic fracturing within the Eagle Ford Formation. Copyright © 2014. The American Association of Petroleum Geologists. All rights reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84919340840&doi=10.1306%2f08191414053&partnerID=40&md5=d3e15d13da1ea61b488d7a126f2bdf2c
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/13176
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:
Ferrill D.A.,McGinnis R.N.,Morris A.P.,et al. Control of mechanical stratigraphy on bed-restricted jointing and normal faulting: Eagle Ford Formation, south-central Texas[J]. AAPG Bulletin,2014-01-01,98(11)