Characteristic of homodrimane and maturity of organic matter in the low mature source rocks |
| |
| Authors: | Pingping Bing Siyuan Cao Jiaotong Lu Zongjun Wang |
| |
| Institution: | 1. CNPC Key Laboratory of Geophysics, China University of Petroleum, Beijing, 102249, China
|
| |
| Abstract: | Bicyclic sesquiterpenoids are mostly used to illustrate the origins of organic matter and genetic types of crude oil presently.
In this paper, the relationship between distributions and compositions of C16 homodrimane in immature to mature source rocks and evolution of organic matter was studied, and the correlation between C16 homodrimane at immature to low mature stages and thermal evolution of organic matter was analyzed. The results show that
in terrestrial facies depositional system, the ratio of 8α(H)-homodrimane to 8β(H)-homodrimane has a high sensitivity about
the maturity’s minor changes at immature to low mature stages. It is found that when the vitrinite reflectance R
0<0.7%, the ratio significantly decreases with increasing burial depth or maturity. This kind of phenomenon reveals that these
parameters may be the useful maturity indicators for determining the relative maturation of organic matter at immature to
low mature stages, and have certain practical value in biogeochemical and environmental geochemical research on low mature
oil and gas. |
| |
| Keywords: | bicyclic sesquiterpenoid homodrimane low mature vitrinite reflectance organic matter |
| 本文献已被 CNKI SpringerLink 等数据库收录！ |
|
