Multi-source hydrocarbon generation and accumulation of plateau multiple petroleum system in Qaidam Basin
Online published: 2011-06-20
Undergoing an evolution cycle of Palaeozoic “block-trough” andMesozoic “basin-orogenic belt”, Qaidam Basin developed four different types of source rocks, including Carboniferous marine-continental transitional facies, Jurassic limnetic facies, Tertiary saline facies and Quaternary salt lake facies, and formed a compound oil/gas system of “multisource, multi-depression, and multi-kitchen”, which has a characteristic of “multi-factor controlling hydrocarbon-charging, multi-structure and multi-type-trap reservoir formation, multi-layer oiliness”. Based on the research of reservoir forming mechanism, it is revealed that different types of reservoir can form outside the source rock, on slope, in late Himalayan traps and deep layer, which can guide the exploration and bring newdiscoveries and progress.
Key words: coalbed methane; cheat; matrix; adsorption; desorption; degas; diffusion
LI Chuanliang , PENG Chaoyang . Multi-source hydrocarbon generation and accumulation of plateau multiple petroleum system in Qaidam Basin[J]. Lithologic Reservoirs, 2011 , 23(3) : 7 -14 . DOI: 10.3969/j.issn.1673-8926.2011.03.002
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