THE EFFECT OF HYDRATION TO THE FORMATION OF SHALE ON“SAVE”DRILLING

doi:10.3863/j.issn.1000-2634.1999.02.14

西南石油大学学报(自然科学版) ›› 1999, Vol. 21 ›› Issue (2): 49-49–52.DOI: 10.3863/j.issn.1000-2634.1999.02.14

• 钻采工艺与设备 • Previous Articles Next Articles

THE EFFECT OF HYDRATION TO THE FORMATION OF SHALE ON“SAVE”DRILLING

Liu xiang-jun¹Luo Ping-ya¹Liu You-jia²

Southwest Petroleum Inst

Received:1999-01-20 Revised:1900-01-01 Online:1999-04-20 Published:1999-04-20

Abstract

Abstract:

Shale formation is different from “inactive” rocks when contacting with water-based drilling fluid, rock strength and the internal stress around borehole in the hale formation will change with mud properties and time in which shale formation had been opened. Finally stability will be decreased. The effects of hydration on stresses distributions, caving pressure and fracture pressure of shale formation around borehole had been studied quantitatively. The results have illustrated that shale hydration will decrease the fracture pressure, and increase caving pressure.

Key words: equation of state, hydrochemistry, hole status, hole stability, rock mechanics, rock mechanics, rock stress, mudstone, shale

CLC Number:

TE283

Liu xiang-jun Luo Ping-ya Liu You-jia. THE EFFECT OF HYDRATION TO THE FORMATION OF SHALE ON“SAVE”DRILLING[J]. 西南石油大学学报(自然科学版), 1999, 21(2): 49-49–52.

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THE EFFECT OF HYDRATION TO THE FORMATION OF SHALE ON“SAVE”DRILLING

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