Characteristics of shale reservoir of the first member of Qingshankou Formation in northern Songliao Basin
Online published: 2014-10-20
The reservoir quality is the key factor for influencing the enrichment of shale oil and gas. Through core observation, thin section identification, scanning electronic microscope, isothermal adsorption and other means, this paper studied the petrology and reservoir characteristics of oil shale of the first member of Qingshankou Formation in northern Songliao Basin. The result shows that the rock types of reservoir include with silt mudstone, silty mudstone, lime mudstone and siltstone. The silty mudstone, lime mudstone and siltstone are with higher contents of fragile mineral, and developed various types of reservoir space which constitutes a complexes level and vertical fracture net-system. Intergranular dissolved pores are more developed in thinsiltstone layers or laminate, and their porosity can reach micron level. The reservoir of the first member of Qingshankou Formation belongs to ultra-low porosity and ultra-low permeability reservoir. The silty mudstone, lime mudstone andcarbonaceous siltstone have best reservoir properties.
Key words： ; line-height: 107%; font-size: 10.5pt;">abnormal high pressure; line-height: 107%; font-size: 10pt;">；; line-height: 107%; font-size: 10.5pt;">hydrocarbon accumulation; line-height: 107%; font-size: 10pt;">；; line-height: 107%; font-size: 10.5pt;">formation mechanism; line-height: 107%; font-size: 10pt;">；; line-height: 107%; font-size: 10.5pt;">Raoyang Sag
WANG Zhihong , LI Jianming . Characteristics of shale reservoir of the first member of Qingshankou Formation in northern Songliao Basin[J]. Lithologic Reservoirs, 2014 , 26(5) : 64 -68 . DOI: 10.3969/j.issn.1673-8926.2014.05.012
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