Study on Accumulation Conditions of Tight Sandstone Reservoirs in Huaqing Area, Ordos Basin

doi:10.3969/j.issn.1006-6535.2021.06.003

Abstract

Abstract: In response to severe restrictions on exploration and development by high heterogeneity and poor physical properties of sandstone in Chang₆ oil-bearing formation in Huaqing Area, Ordos Basin, the accumulation conditions of tight sandstone reservoirs in Chang₆ oil-bearing formation in the study area were studied in depth according to the theories of petroleum geology, sedimentary petrology, and petroleum accumulation dynamics, in combination of various test and analysis data. The results of the study showed that the accumulative conditions of tight sandstone reservoirs in Chang₆ oil-bearing formation in Well Block B257, Huaqing Area were controlled by high-quality source rocks, favorable reservoirs and reservoir characteristics. Finally, two favorable exploration areas were identified based on the sedimentary background, tectonic conditions, reservoir conditions, source rock conditions and production conditions of the oil-bearing formation. This study indicates the direction for the exploration and development of Chang₆ tight sandstone reservoir in Well Block B257, Huaqing Area.

Key words: tight sandstone, low-permeability oil reservoir, accumulation conditions, Huaqing Area, Ordos Basin

CLC Number:

TE122.2

Shi Kanyuan, Pang Xiongqi, Wang Ke, Niu Siqi. Study on Accumulation Conditions of Tight Sandstone Reservoirs in Huaqing Area, Ordos Basin[J]. Special Oil & Gas Reservoirs, 2021, 28(6): 20-26.

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