Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1306/0828171614717055 |
Organic geochemistry of the Eagle Ford Group in Texas | |
Romero, Andrea A. Miceli1; Thanh Nguyen2; Philp, R. Paul3 | |
2018-07-01 | |
发表期刊 | AAPG BULLETIN |
ISSN | 0149-1423 |
EISSN | 1558-9153 |
出版年 | 2018 |
卷号 | 102期号:7页码:1379-1412 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Singapore |
英文摘要 | A comprehensive regional organic geochemical study was performed on outcrop and core samples from the Eagle Ford Group with the aim of determining variations in organic matter source, thermal maturity, and depositional environments. Total organic carbon (TOC) and Rock-Eval pyrolysis parameters show that the Eagle Ford Group has excellent hydrocarbon source rock potential and is dominated by type II kerogen. Distributions of regular steranes, hopanes, and monoaromatic steroids confirm a marine carbonate depositional environment. Aryl isoprenoid ratios suggest the occurrence of intermittent photic zone anoxia. The n-alkane and sterane distributions and the presence of pregnanes, homopregnanes, and gammacerane suggest deposition under hypersaline conditions particularly in west and east Texas. In east Texas, biomarkers indicate that the Eagle Ford Group was partially sourced from terrigenous organic matter and deposited under oxic-suboxic conditions. Thermal maturity parameters including the temperature at which the peak corresponding to the compounds produced from the thermal degradation of kerogen in the Rock-Eval chromatogram maximizes (T-max), vitrinite reflectance, and biomarker ratios indicate that in west and central Texas, the Eagle Ford Group is immature to marginally mature; in southwest Texas it is in the oil to dry gas window; and in east Texas, the Eagle Ford is in the main stage of oil generation. Geochemical logs of biomarker ratios show that the Lower Eagle Ford Formation has the highest TOC and hydrogen index, particularly in the Lozier Canyon Member; experienced stronger anoxic conditions during deposition; and has lower clay content compared with the Upper Eagle Ford Formation. Geochemical parameters show that the latter may have received an additional siliciclastic and terrigenous organic matter input under oxicdysoxic conditions. Isotope data indicate a marine organic matter source for the Eagle Ford Group, but surprisingly, delta C-13 values do not show significant organic facies, depositional environment, or thermal matu-rity variations. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000445704600008 |
WOS关键词 | MISSISSIPPIAN BARNETT SHALE ; PHOTIC-ZONE ANOXIA ; DEPOSITIONAL-ENVIRONMENTS ; MATURITY PARAMETERS ; SOURCE ROCKS ; CRUDE OILS ; BASIN ; HYDROCARBONS ; MATTER ; BLACK |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/24627 |
专题 | 地球科学 |
作者单位 | 1.Texas A&M Univ, Chevron Basin Modeling Ctr Res Excellence, College Stn, TX 77843 USA; 2.Natl Univ Singapore, Dept Biomed Engn, Singapore, Singapore; 3.Univ Oklahoma, ConocoPhillips Sch Geol & Geophys, Norman, OK 73019 USA |
推荐引用方式 GB/T 7714 | Romero, Andrea A. Miceli,Thanh Nguyen,Philp, R. Paul. Organic geochemistry of the Eagle Ford Group in Texas[J]. AAPG BULLETIN,2018,102(7):1379-1412. |
APA | Romero, Andrea A. Miceli,Thanh Nguyen,&Philp, R. Paul.(2018).Organic geochemistry of the Eagle Ford Group in Texas.AAPG BULLETIN,102(7),1379-1412. |
MLA | Romero, Andrea A. Miceli,et al."Organic geochemistry of the Eagle Ford Group in Texas".AAPG BULLETIN 102.7(2018):1379-1412. |
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