Brittleness evaluation of the inter-salt shale oil reservoir in Jianghan Basin in China

doi:10.1016/j.marpetgeo.2018.12.013

CORC > 武汉岩土力学研究所 > 中科院武汉岩土力学所 > 岩土力学所知识全产出 > 期刊论文

	Brittleness evaluation of the inter-salt shale oil reservoir in Jianghan Basin in China
	Fan, X.; Su, J. Z.; Chang, X.; Huang, Z. W.; Zhou, T.; Guo, Y. T.; Wu, S. Q.
刊名	MARINE AND PETROLEUM GEOLOGY
	2019
卷号	102 期号:-页码:109-115
ISSN号	0264-8172
DOI	10.1016/j.marpetgeo.2018.12.013
英文摘要	The inter-salt shale in the Qianjiang formation of Jianghan Basin in China are characterized by multiple bedding planes, low rock strength, complicated mineral compositions and high heterogeneity of rock mechanics. The brittleness evaluation of the inter-salt shale has not been investigated. Core samples of the inter-salt shale from the fourth member of the Qianjiang Formation were tested by using CT scan, X-ray diffraction, tri-axial rock test at the in-situ condition. An integrated investigation was conducted on the brittleness evaluation of inter-salt shale from the perspective of core characteristics, brittle mineral components, elastic parameters and the complete stress-strain characteristics of rocks. The results indicate that the inter-salt shale exist with bedding planes and glauberite, which leads to high anisotropy and heterogeneity. The argillaceous dolomite is a good candidate for fracturing due to high brittle mineral content. The elastic parameters of the inter-salt shale at the in-situ conditions are quite different with that of the gas shale because of the difference in the mineral composition, the bedding plane structure and the fluid type stored in the pore space. The brittleness index of the inter-salt shale can be calculated through a modified Rickman model. The transformation model of the dynamic-static mechanic parameters has been built based on the logging data and the laboratory data in order to obtain the brittleness index profile along the wellbore. The post-peak stress-strain relations indicates the rock has high residual strength at confined stress state, which explains that the rock is damaged through shear failure along the bedding plane and fails to generate complex fractures. This study would provide theoretical basis for fracability evaluation model used in the inter-salt shale oil reservoir.
WOS研究方向	Geology
语种	英语
WOS记录号	WOS:000464086400009
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/15007]
专题	岩土力学所知识全产出_期刊论文
作者单位	1.State Energy Ctr Shale Oil Res & Dev, Beijing, Peoples R China; 2.SINOPEC, Explorat & Prod Res Inst, Beijing, Peoples R China; 3.Chinese Acad Sci, Inst Rock & Soil Mech, Wuhan, Hubei, Peoples R China; 4.SINOPEC, Jianghan Oil Field, Res Inst Explorat & Dev, Qianjiang, Peoples R China
推荐引用方式 GB/T 7714	Fan, X.,Su, J. Z.,Chang, X.,et al. Brittleness evaluation of the inter-salt shale oil reservoir in Jianghan Basin in China[J]. MARINE AND PETROLEUM GEOLOGY,2019,102(-):109-115.
APA	Fan, X..,Su, J. Z..,Chang, X..,Huang, Z. W..,Zhou, T..,...&Wu, S. Q..(2019).Brittleness evaluation of the inter-salt shale oil reservoir in Jianghan Basin in China.MARINE AND PETROLEUM GEOLOGY,102(-),109-115.
MLA	Fan, X.,et al."Brittleness evaluation of the inter-salt shale oil reservoir in Jianghan Basin in China".MARINE AND PETROLEUM GEOLOGY 102.-(2019):109-115.