Bibliographic Details
| Title: |
Geochemical study and significance of sequential extraction in reservoir rocks of Turpan-Hamin Basin. |
| Authors: |
Yu Linping1, Pan Changchun1 cpan@gig.ac.cn, Fu Jiamo1 |
| Source: |
Chinese Science Bulletin. Dec2004 Supplement, Vol. 49, p32-38. 6p. |
| Subjects: |
Geochemistry, Rocks, Reservoirs, Geological basins, Structural geology, Mudstone |
| Abstract: |
Seven samples collected from the Turpan-Hamin Basin were treated by sequential extraction method. Analytical results indicate that the free oils, inclusion oils (oil-bearing fluid inclusions) and clay-adsorbed oils vary significantly. The geochemical characteristics of inclusion and clay-adsorbed oils correlate well with the lacustrine mudstones. The characteristics are as follows: (i) with higher Ph/nC18 ratio and lower Pr/Ph ratio; (ii) with higher values of C26 tricyclic/C24 tetracyclic terpane, C23 tricyclic terpane/(C23 tricyclic terpane+C3017α(H) hopane), C21/(C21+C29) sterane, Ts/Tm and C29Ts/C2917α(H) norhopane and lower value of C19/C21 tricyclic terpane; (iii) with relatively high content of C27 and C28 sterane and lower abundance of C29 sterane and diasterane. They indicate that the early charged oils are derived from the pre-Jurassic lacustrine mudstones and the later charged oils are from the Jurassic coal-bearing strata or coals. [ABSTRACT FROM AUTHOR] |
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| Database: |
Engineering Source |
