Quantitative analysis of slope stability of drilling sites with complex topography in the Qiongdongnan continental slope

doi:10.1088/1755-1315/570/6/062044

CORC > 深海科学与工程研究所 > 中国科学院深海科学与工程研究所 > 深海科学研究部 > 深海地球物理与资源研究室

	Quantitative analysis of slope stability of drilling sites with complex topography in the Qiongdongnan continental slope
	Sun,Jin 3; Wang,Dawei 3; Wu,Shiguo 3; Ouyang,Min 1; Liu,Hailong 2
刊名	IOP Conference Series: Earth and Environmental Science
	2020-10-01
卷号	570 期号:6
ISSN号	1755-1307
DOI	10.1088/1755-1315/570/6/062044
英文摘要	Abstract Due to the large slope angle and the weak strength of submarine soils, Qiongdongnan deepwater continental slopes face great instability problems. In continental slope area, evaluating the stability of the slope before drilling is important as slope instability threatens the drilling safety. Taking the Lingshui deepwater well site as an example, 2D and 3D submarine slope stability calculation models, which consider the vertical heterogeneity of soil strength, were established based on the strength reduction method and Flac3D. The vertical profile of the soil shear strength was obtained via cone penetration and geotechnical tests. The effect of returned cuttings and drilling disturbance on slope stability were analyzed, and the safety factor of the slope was calculated. In addition, the position of potential slip surfaces and the possible slip directions were analyzed. Based on this, the location of the well was determined. The results indicate that the minimum safety factor of slope, which crosses the well, is 1.32. Moreover, the risk of submarine landslide is low. One potential landslide mass exists. However, the slope near the well is stable, and the slip direction of the landslide mass does not point to the well. The returned cuttings from the borehole decrease the safety factor and increase the risk of slope instability near the well.
语种	英语
出版者	IOP Publishing
WOS记录号	IOP:1755-1307-570-6-062044
内容类型	期刊论文
源URL	[http://ir.idsse.ac.cn/handle/183446/7981]
专题	深海科学研究部_深海地球物理与资源研究室
作者单位	1.CNOOC China Limited, Zhanjiang Branch, Zhanjing 524057, China. 2.CNOOC China Limited, Tianjin Branch, Tianjin 300459, China. 3.Laboratory of Marine Geophysics and Georesource, Institute of Deep-sea Science and Engineering, Chinese Academy of Sciences, Sanya 572000, China.
推荐引用方式 GB/T 7714	Sun,Jin,Wang,Dawei,Wu,Shiguo,et al. Quantitative analysis of slope stability of drilling sites with complex topography in the Qiongdongnan continental slope[J]. IOP Conference Series: Earth and Environmental Science,2020,570(6).
APA	Sun,Jin,Wang,Dawei,Wu,Shiguo,Ouyang,Min,&Liu,Hailong.(2020).Quantitative analysis of slope stability of drilling sites with complex topography in the Qiongdongnan continental slope.IOP Conference Series: Earth and Environmental Science,570(6).
MLA	Sun,Jin,et al."Quantitative analysis of slope stability of drilling sites with complex topography in the Qiongdongnan continental slope".IOP Conference Series: Earth and Environmental Science 570.6(2020).