DOI: 10.1306/11051414018
Scopus记录号: 2-s2.0-84906753703
论文题名: Heterogeneous distribution of pyrobitumen attributable to oil cracking and its effect on carbonate reservoirs: Feixianguan Formation in the Jiannan gas field, China
作者: Li P. ; Hao F. ; Zhang B. ; Zou H. ; Yu X. ; Wang G.
刊名: AAPG Bulletin
ISSN: 0149-1480
EISSN: 1558-9210
出版年: 2015
发表日期: 2015
卷: 99, 期: 4 起始页码: 763
结束页码: 789
语种: 英语
Scopus关键词: Bituminous materials
; Cracks
; Gas industry
; Gases
; Low permeability reservoirs
; Natural gas fields
; Petroleum reservoirs
; Carbonate reservoir
; Favorable targets
; Feixianguan formation
; Heterogeneous distributions
; Low concentrations
; Northeastern Sichuan
; Secondary cracking
; Tigh treservoirs
; Petroleum reservoir engineering
; bitumen
; carbonate sediment
; cracking
; gas field
; heterogeneity
; hydrocarbon exploration
; hydrocarbon reservoir
; natural gas
; Permian
; pore space
; qualitative analysis
; source rock
; Triassic
; China
; Jiannan Gas Field
; Sichuan Basin
Scopus学科分类: Energy
; Earth and Planetary Sciences
英文摘要: Few previous studies have focused on solid bitumen distribution and its effect on gas reservoir quality during oil cracking. Solid bitumen is commonly found in both gas and nongas reservoirs of the Triassic Feixianguan Formation (T1 f) in the Jiannan gas field. The T1 f natural gases are mainly secondary cracking gases of oil generated from source rock of the Permian Wujiaping Formation (P2 w), and the reservoir experienced temperatures above 150°C (302°F) for about 35 m.y. A relatively narrow range of ln(C1 /C2 ) values and a wide range of ln(C2 /C3 ) values and widespread solid bitumen indicate that oil cracking took place in the gas field. Low concentrations of H2 S (commonly <0.81%) suggest that high-reflectance (2.57%-3.07%) solid bitumens are pyrobitumens, which would have been mainly derived from oil cracking. Gases preferentially occupy larger pore spaces, and oil is displaced into small pores and throats by overpressure during oil cracking. In this way, pyrobitumens can reduce the magnitude of porosity in relatively tight reservoirs. Moderate-quality oil reservoirs (paleoporosity 2.2%-8.0%) are between or adjacent to high-quality oil reservoirs and are probably poor-quality or nongas reservoirs after oil cracking. Carbonate reservoirs (paleoporosity >8.0%) can be high-quality gas reservoirs after oil cracking and should be favorable targets for future gas exploration in the northeastern Sichuan Basin and adjacent areas. Copyright © 2015. The American Association of Petroleum Geologists. All rights reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84906753703&doi=10.1306%2f11051414018&partnerID=40&md5=4b5e146d84e3c4eed20142e7f364bdee
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/13051
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:
Li P.,Hao F.,Zhang B.,et al. Heterogeneous distribution of pyrobitumen attributable to oil cracking and its effect on carbonate reservoirs: Feixianguan Formation in the Jiannan gas field, China[J]. AAPG Bulletin,2015-01-01,99(4)