Xinjiang Petroleum Geology ›› 2001, Vol. 22 ›› Issue (2): 150-151.

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A Query to Mr. LI Chuan-liang’s Overburden Formation Pressure Formula

ZHOU Da-chen   

  • Received:2000-12-18 Online:2001-04-01 Published:2020-08-13
  • About author:ZHOU Da-chen (1945-), Male, Senior Engineer, Oilfield Development, Scientific Research Institute of Exploration and Development. CNPC. Beijing 100083, China

Abstract: this paper discussed once more the reasonableness of concept of formation-surface and the correctness of formula p0=σ'+ppφ0. At the same time, it has been proved that the formula p0=ppφ0+σ(1-φ), is a erroneous one. The author suggested that the effective stress and granular pressure are two different concepts, and also pointed out the differences between them.

Key words: stress, formation pressure, balance, rock grain

CLC Number: