›› 2011, Vol. 32 ›› Issue (6): 1625-1630.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Testing and analyzing rock mechanical characteristics for deep formation

ZHOU Yan-jun1,2, GENG Ying-chun2, WANG Gui-bin3, TANG Hong-lin2, LI Zu-kui2   

  1. 1.College of Petroleum Engineering, China University of Petroleum (East China), Dongying , Shandong 257061, China; 2. Shengli Drilling Technology Research Institute, Dongying, Shandong 257017, China; 3. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China
  • Received:2010-01-20 Online:2011-06-10 Published:2011-06-21

Abstract: In order to solve the key technology of ultra-deep well drilling-improving cutting efficiency and rate of penetration in marine facies complex exploration area of south China, it is required to collect outcrops of Northeast Sichuan area formation, test and analyze their rock mechanical characteristics at normal temperature and simulated downhole conditions with available apparatuses. The goal and meaning of the test and collected samples were briefly introduced. The experimental scheme, testing apparatus, samples, the results and data statistical method were stated. According to statistical results, the method for analyzing rock mechanical characteristics of deep formation and related qualitative and quantitative results acquired were presented in detail. And the rock breaking mechanism of ultra-deep well drilling was qualitatively analyzed. Research shows that by testing and analysis: the mechanical properties of the rock directly related rock breaking. Under the action of temperature and pressure factors, the deep changes in mechanical properties of rock result in rock broken of cut way to scrape more difficult in the deep strata of rock. This is the key factor of the ultra-deep drilling speed can not be greatly improved. Through this pilot study and analysis, access to a set of rocks mechanical properties under different environmental conditions. Changes in mechanical properties of the qualitative and quantitative conclusions will provide technical support for rock breaking mechanism, high-performance bit research and selection in deep and ultra deep drilling

Key words: deep formation, ultra-deep well drilling, rock breaking mechanism

CLC Number: 

  • TU 443
[1] MO Zhen-ze ,LI Hai-bo ,ZHOU Qing-chun ,HE En-guang ,ZOU Fei ,ZHU Xiao-ming ,ZHAO Yu. Research on numerical simulation of rock breaking using TBM disc cutters based on UDEC method [J]. , 2012, 33(4): 1196-1202.
[2] CHANG De-yu, LI Gen-sheng, SHEN Zhong-hou, HUANG Zhong-wei,. Study of bottom-hole stress field with differential pressure of 3D in-situ stress under different drilling conditions [J]. , 2011, 32(5): 1546-1552.
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