柴达木盆地高原复合油气系统多源生烃和复式成藏

doi:10.3969/j.issn.1673-8926.2011.03.002

Lithologic Reservoirs ›› 2011, Vol. 23 ›› Issue (3): 7-14.doi: 10.3969/j.issn.1673-8926.2011.03.002

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Multi-source hydrocarbon generation and accumulation of plateau multiple petroleum system in Qaidam Basin

YUAN Jianying¹， FU Suotang²， CAO Zhenglin¹， YAN Cunfeng¹，ZHANG Shuichang³， MA Dade²

1. Research Institute of Petroleum Exploration & Development-Northwest， PetroChina， Lanzhou 730020， China； 2. Qinghai Oilfield Company， PetroChina， Dunhuang 736200， China； 3. Petroleum Geology Research and Laboratory Center， Research Institute of Petroleum Exploration & Development， PetroChina， Beijing 100083， China

Online:2011-06-20 Published:2011-06-20

Abstract

Abstract:

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

YUAN Jianying， FU Suotang， CAO Zhenglin， YAN Cunfeng，ZHANG Shuichang， MA Dade. Multi-source hydrocarbon generation and accumulation of plateau multiple petroleum system in Qaidam Basin[J].Lithologic Reservoirs, 2011, 23(3): 7-14.

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