柴达木盆地油气藏特征分析及对油气勘探的意义

doi:10.11743/ogg20070103

Abstract

Abstract:

Six features of the reservoirs in Qaidam Basin is summarized through a detailed analysis of its 19 oil/gas pools: ① oil layers are thin and oil/gas-bearing area is relatively small;② reservoir petrophysical properties are rather poor;③ Tertiary oil maturity is relatively low as a whole;④ pool types can involve structural,stratigraphic or lithological ones or a combination of them;⑤ the distribution of oil and gas pools is controlled by faults and fault reservoirs are dominant;and ⑥ late destruction of oil/gas pools is more severe.By systematic study of all these characteristics,the writers further point out that ① small and middle-sized oil fields is scattered in the basin,but larger ones are rarely found;② hydrocarbon accumulations are mainly distributed in the palaeo-structural traps near oil-generating center(source rocks);③ while continuously strengthening the exploration of structural oil and gas pools,the searching for stratigraphic and lithological oil and gas pools should also be stressed,and ④ the role of faults in the formation and distribution of oil and gas pools should be further stu-died.

Key words: fault pool, reservoir characteristics, exploration significance, Qaidam Basin

CLC Number:

TE112.3

Li Weilian, Liu Zhen, Xu Zhangyou, Wu Xinsong. Analysis on reservoir characteristics of Qaidam Basin and its significance to petroleum exploration[J]. Oil & Gas Geology, 2007, 28(1): 18-24,34.

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Analysis on reservoir characteristics of Qaidam Basin and its significance to petroleum exploration

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