湖相、海相泥页岩孔隙分形特征对比

doi:10.3969/j.issn.1673-8926.2016.01.011

Lithologic Reservoirs ›› 2016, Vol. 28 ›› Issue (1): 88-93.doi: 10.3969/j.issn.1673-8926.2016.01.011

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Fractal characteristics of lacustrine shale and marine shale

Wang Zhiwei^1，2， Lu Shuangfang¹， Wang Min¹， Tian Shansi^1，2

1. Research Institute of Unconventional Petroleum and Renewable Energy ， China University of Petroleum ， Qingdao 266580 ， Shandong ， China ； 2. School of Geosciences ， China University of Petroleum ， Qingdao 266580 ， Shandong ， China

Online:2016-01-20 Published:2016-01-20

Abstract

Abstract:

Based on the low temperature nitrogen adsorption test of lacustrine shale in Songliao Basin, FHH model was used to discuss the relations of fractal dimension of nano-pore structure with specific surface area, average pore size and TOC content, and then compare the characteristics of fractal dimension between lacustrine shale and marine shale. The result shows that: （1） the nano-pores of the lacustrine shale and marine shale have obvious fractal characteristics, and the large pore （5-100 nm）, with a bigger fractal dimension, shows a higher degree of complexity than the small pore （less than 5 nm）; （2）the nano-pore structure of lacustrine shale is relatively simple, and its fractal dimension is less than that of the marine shale; （3）the fractal dimension is positively correlated with TOC content, and the TOC of lacustrine shale has weaker influence on fractal dimension; （4）the fractal dimension （D1） of lacustrine shale has a significant linear relationship with the average pore size, which shows that D1 can reflect the pore structure features of lacustrine shale, while the fractal dimension （D2） of marine shale has an exponential relationship with the specific surface area, which shows that D2 can reflect the pore specific surface area characteristics of marine shale.

Key words: pore structure , classified evaluation , Toutunhe Formation , eastern slope of Fukang Depression , Junggar Basin

Wang Zhiwei,Lu Shuangfang,Wang Min,Tian Shansi. Fractal characteristics of lacustrine shale and marine shale[J].Lithologic Reservoirs, 2016, 28(1): 88-93.

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