非常规油气致密储集层微观结构研究进展*

doi:10.7605/gdlxb.2013.05.049

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Abstract

Nano-pores dominate the storage space of tight reservoirs and the connectivity of pore throat system is complex. The diameter of organic matter pores and intra-particle pores in marine shale with high maturity of southern China are 20～890 nm. The pores in terrestrial shale are organic matter pores and matrix pores, with diameter between 30～200 nm. The storage space in tight sandstone includes dissolution pores and micro-fractures with diameter in 10～200 μm. Nano-pores are composed by inter-particle pores and inter-crystal pores with diameter 70～400 nm. The calcite dissolution pores, inter-particle dissolution pores and micro-fractures dominate the nano-pores in tight limestones and the diameter is 50～500 nm. Reservoir digenetic modeling data indicates that total porosity in shale increases firstly and decreased later with the increase of|temperature and pressure. Four occurrences of oil in nano-pores have been distinguished and inter-particle pores are the most favorable for the oil accumulation. Moreover, due to the special characteristics of unconventional oil and gas, further work should be focused on the instrument improvement, technology innovation and evaluation parameter optimization.

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	Articles by authors
	Zhu Rukai
	Bai Bin
	Cui Jingwei
	Wu Songtao
	Cui Jinggang
	Wang Tuo
	Niu Lu
	Li Tingting

Key words： unconventional oil and gas reservoir micro-pore throat characterization pore throat evolution oil and gas occurrence

Received: 11 May 2013 Published: 01 October 2013

ZTFLH:

P588.24+5

About author: Zhu Rukai, born in 1968, is the vice department director of Central Laboratory of Geosciences, RIPED, PetroChina and director of Key Laboratory of Oil and Gas Reservoirs. His research work is focused on the sedimentology and reservoir evaluation and prediction. E-mail: zrk@petroChina.com.cn.

Cite this article:

Zhu Rukai,Bai Bin,Cui Jingwei et al. Research advances of microstructure in unconventional tight oil and gas reservoirs[J]. JOPC, 2013, 15(5): 615-623.

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http://journal09.magtechjournal.com/gdlxb/EN/10.7605/gdlxb.2013.05.049 OR http://journal09.magtechjournal.com/gdlxb/EN/Y2013/V15/I5/615

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