Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1306/0121191619717287 |
Factors controlling source and reservoir characteristics in the Niobrara shale oil system, Denver Basin | |
Han, Yuanjia1,2; Horsfield, Brian3; Mahlstedt, Nicolaj3; Wirth, Richard4; Curry, David J.5; LaReau, Heather6 | |
2019-09-01 | |
发表期刊 | AAPG BULLETIN |
ISSN | 0149-1423 |
EISSN | 1558-9153 |
出版年 | 2019 |
卷号 | 103期号:9页码:2045-2072 |
文章类型 | Article |
语种 | 英语 |
国家 | Germany; Peoples R China; USA |
英文摘要 | This paper clarifies the controls of oil retention in the Niobrara Formation, Denver Basin, in the western United States. Sweet spots have been recognized using a total of 98 core samples from 5 wells with maturities covering the oil window. Oil retention in the source rock samples (carbonate content <70 wt. %) is controlled by organic matter richness and thermal maturity. In general, the vaporizable hydrocarbon (HC) yield at nominal temperatures at 300 degrees C ([S-1]; Rock-Eval) is positively correlated to total organic carbon (TOC). With increasing maturity, the so-called oil saturation index (S-1/TOC x 100) first increases until a maximum retention capacity (100 mg HC/g TOC) is exceeded at the temperature at the maximum rate of petroleum generation by Rock-Eval pyrolysis (T-max) of approximately 445 degrees C and subsequently decreases. The depletion in oil retention capacity is believed to be associated with the appearance of organic nanopores. Oil retention in samples with distinct reservoir potential (carbonate >30 wt. %) is controlled by carbonate content, which is positively related to the amount of retained oil. Petrographic features indicate that oil or bitumen is stored in porous calcite fossils (i.e., coccolith and foraminifera), which provide additional space for petroleum storage. Chalk samples (carbonate >85 wt. %) are characterized by anomalously low T-max values caused by the influence of heavy petroleum or bitumen. The amount of this bitumen is higher than the initial petroleum potential of kerogen in A and B chalks and thus must have been emplaced here. The most likely sources are juxtaposed organic-rich marl layers. Thus, sweet spots occur where carbonate content is either low (high TOC) or high (low TOC), whereas production of petroleum from the pore space of presumably brittle chalk seems more attractive than production from organic- and clay-rich rocks. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000489899600002 |
WOS关键词 | MISSISSIPPIAN BARNETT SHALE ; FORT-WORTH BASIN ; ION-BEAM FIB ; WESTERN INTERIOR ; LOWER TOARCIAN ; ORGANIC-RICH ; PETROLEUM FORMATION ; THERMAL MATURITY ; GAS GENERATION ; PORE TYPES |
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/186304 |
专题 | 地球科学 |
作者单位 | 1.German Res Ctr Geosci GFZ, Potsdam, Germany; 2.China Univ Geosci, Key Lab Tecton & Petr Resources, Wuhan, Hubei, Peoples R China; 3.GFZ, Sect Organ Geochem, Potsdam, Germany; 4.GFZ, Sect Chem & Phys Earth Mat, Potsdam, Germany; 5.Noble Energy Inc, Houston, TX USA; 6.BP Amer Prod Co, BPX Energy, Denver, CO USA |
推荐引用方式 GB/T 7714 | Han, Yuanjia,Horsfield, Brian,Mahlstedt, Nicolaj,et al. Factors controlling source and reservoir characteristics in the Niobrara shale oil system, Denver Basin[J]. AAPG BULLETIN,2019,103(9):2045-2072. |
APA | Han, Yuanjia,Horsfield, Brian,Mahlstedt, Nicolaj,Wirth, Richard,Curry, David J.,&LaReau, Heather.(2019).Factors controlling source and reservoir characteristics in the Niobrara shale oil system, Denver Basin.AAPG BULLETIN,103(9),2045-2072. |
MLA | Han, Yuanjia,et al."Factors controlling source and reservoir characteristics in the Niobrara shale oil system, Denver Basin".AAPG BULLETIN 103.9(2019):2045-2072. |
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