Hydrocarbon migration law and model of Chang 9 reservoir in Jiyuan area, Ordos Basin
Online published: 2011-10-20
The research means and methods of reservoir geochemistry, reservoir geology and sedimentology are applied to discuss the hydrocarbon sources, migration mechanism, dynamics and accumulation pattern of Chang 9 reservoir in Jiyuan area. The result shows that the crude oil of Chang 9 reservoir comes primarily fromthe high-quality hydrocarbon source rocks ofChang 7 reservoir, ofwhich the hydrocarbon migrated downward and accumulated in Chang 9 reservoir. The main dynamic ofChang 7 hydrocarbon migrating to Chang 9 reservoir is mainly fromthe abnormal high pressure of Chang 7 hydrocarbon source rock hydrocarbon pressurization and excess pressure difference between Chang 7 and Chang 9 reservoir. The vertical superposition and lateral connecting sand bodies and the fractures formed in the regional tectonic activity are the favorable migration path for connectingChang 7 high-quality hydrocarbon source rocks with Chang 9 reservoir.
Key words: micropore; diagenesis; sandstone reservoir; Jurassic; Lunnan area
XU Xiongfei , WANG Jiawei , YANG Bo , XING Yi , ZHOU Guobao , CAO Ronghao . Hydrocarbon migration law and model of Chang 9 reservoir in Jiyuan area, Ordos Basin[J]. Lithologic Reservoirs, 2011 , 23(5) : 9 -15 . DOI: 10.3969/j.issn.1673-8926.2011.05.003
/
〈 |
|
〉 |