Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1306/09221616069 |
Oil retention and porosity evolution in organic-rich shales | |
Han, Yuanjia1; Horsfield, Brian1; Wirth, Richard2; Mahlstedt, Nicolaj1; Bernard, Sylvain3 | |
2017-06-01 | |
发表期刊 | AAPG BULLETIN |
ISSN | 0149-1423 |
EISSN | 1558-9153 |
出版年 | 2017 |
卷号 | 101期号:6 |
文章类型 | Article |
语种 | 英语 |
国家 | Germany; France |
英文摘要 | Petroleum is retained in shales either in a sorbed state or in a free form within pores and fractures. In shales with oil resource potential, organic matter properties (i.e., richness, quality, and thermal maturity) control oil retention in general. In gas shales, organic pores govern gas occurrence. Although some pores may originate via secondary cracking reactions, it is still largely unclear as to how these pores originate. Here we present case histories mainly for two classic shales, the Mississippian Barnett Shale (Texas) and the Toarcian Posidonia Shale (Lower Saxony, Germany). In both cases, shale intervals enriched in free oil or bitumen are not necessarily associated with the layers richest in organic matter but are instead associated with porous biogenic matrices. However, for the vast bulk of the shale, hydrocarbon retention and porosity evolution are strongly related to changes in kerogen density brought about by swelling and shrinkage as a function of thermal maturation. Secondary organic pores can form only after the maximum kerogen retention (swelling) ability is exceeded at T-max (the temperature at maximum rate of petroleum generation by Rock-Eval pyrolysis) around 445 degrees C (833 degrees F), approximately 0.8% vitrinite reflectance. Shrinkage of kerogen itself leads to the formation of organic nanopores, and associated porosity increase, in the gas window. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000401860000002 |
WOS关键词 | MISSISSIPPIAN BARNETT SHALE ; FORT-WORTH BASIN ; LOWER TOARCIAN ; HILS SYNCLINE ; SOURCE ROCKS ; PORE TYPES ; PETROLEUM ; MATURITY ; KEROGEN ; MATURATION |
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/24366 |
专题 | 地球科学 |
作者单位 | 1.German Res Ctr Geosci, Sect Organ Geochem 3 2, D-14473 Potsdam, Germany; 2.German Res Ctr Geosci, Sect Chem & Phys Earth Mat 4 3, D-14473 Potsdam, Germany; 3.Univ Paris 06, Inst Mineral Phys Mat & Cosmochim, Museum Natl Hist Nat, Sorbonne Univ,Unit Mixtes Rech 7590,CNRS, 61 Rue Buffon, F-75005 Paris, France |
推荐引用方式 GB/T 7714 | Han, Yuanjia,Horsfield, Brian,Wirth, Richard,et al. Oil retention and porosity evolution in organic-rich shales[J]. AAPG BULLETIN,2017,101(6). |
APA | Han, Yuanjia,Horsfield, Brian,Wirth, Richard,Mahlstedt, Nicolaj,&Bernard, Sylvain.(2017).Oil retention and porosity evolution in organic-rich shales.AAPG BULLETIN,101(6). |
MLA | Han, Yuanjia,et al."Oil retention and porosity evolution in organic-rich shales".AAPG BULLETIN 101.6(2017). |
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