华庆地区长81 储层微观孔隙结构特征研究

doi:10.3969/j.issn.1673-8926.2012.04.004

Lithologic Reservoirs ›› 2012, Vol. 24 ›› Issue (4): 19-23.doi: 10.3969/j.issn.1673-8926.2012.04.004

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Microscopic pore structure characteristics of Chang 81 reservoir in Huaqing area

LI Changzheng ^1，2， SUN Wei ^1，2， REN Dazhong^1，2， ZHOU Shuxun³， WANG Xiujuan³

1. State Key Laboratory of Continental Dynamics， Northwest University， Xi’an 710069； 2. Department of Geology， Northwest University， Xi’an 710069， China； 3. Research Institute of Exploration and Development， PetroChina Changqing Oilfield Company， Xi’an 710021， China

Online:2012-08-20 Published:2012-08-20

Abstract

Abstract:

Based on investigation of cast slices，high pressure mercury injection，nuclear magnetic resonance and constant speed mercury injection，this paper studied the microscopic pore structure and microscopic pore fluid characteristics of Chang 81 reservoir in Huaqing area. The result shows that the microscopic pore structure types of Chang 81 reservoir are complex, among which intergranular pore-dissolved pore combination type is perfect，with better connectivity，pore throat radius is larger，and the movable fluid saturation is higher. And this pore combination type is the advantage channel for fluid filtration. Pore throat type，pore throat connectivity，pore throat size and claymineral contents together affect the pore fluid occurrence and flowability. The pore throat size plays a main role，especially the larger throat has an obvious advantage in the improvement of seepage ability.

Key words: diaper, seismic imaging, exploration target, Yinggehai Basin

LI Changzheng， SUN Wei， REN Dazhong， ZHOU Shuxun， WANG Xiujuan. Microscopic pore structure characteristics of Chang 81 reservoir in Huaqing area[J].Lithologic Reservoirs, 2012, 24(4): 19-23.

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