柴达木盆地北缘油气成藏特点

doi:10.11743/ogg20040621

Abstract

Abstract:

Characteristics of hydrocarbon accumulation in typical oil and gas fields in the northern edge of Qaidam basin are analyzed by using homogenization temperature and compositions of inclusions and trap evolution history. Oil and gas in Jurassic reservoirs have been accumulated in 3 different stages, including the end of Jurassic, Oligocene and Pliocene; while that in the lower Tertiary reservoirs have been accumulated in 2 stages, i.e. Oligocene and Pliocene; and that in the upper Tertiary reservoirs are of secondary oil/gas reservoirs, accumulated through upward remigration of hydrocarbons from the adjustment and damage of the lower Tertiary reservoirs, due to post Pliocene tectonic movements. Faults have played a key role all the time during the formation and evolution of oil and gas reservoirs in the northern edge of Qaidam basin.

Key words: oil and gas reservoir, inclusion, hydrocarbon accumulation history, Qaidam basin

CLC Number:

TE112.11

Gao Xianzhi, Ma Dade, Liu Zhen, Wang Liquan. Characteristics of hydrocarbon accumulation in the northern edge of Qaidam basin[J]. Oil & Gas Geology, 2004, 25(6): 707-712.

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Characteristics of hydrocarbon accumulation in the northern edge of Qaidam basin

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