西南石油大学学报(自然科学版) ›› 2012, Vol. 34 ›› Issue (4): 55-61.

• 地质勘探 • Previous Articles     Next Articles

Evaluation of Uncertainties for Pore-pressure Taking Eaton Method asan Example

Zang Yanbin1，2, Wang Ruihe2, Wang Zizhen2, Zhang Rui2, He Yingming2，3   

  1. 1. SINOPEC Research Institute of Petroleum Engineering，Chaoyang，Beijing 100101，China2. College of Petroleum Engineering，China University of Petroleum，Qingdao，Shandong 266555，China3. CNOOC Research Institute，Dongcheng，Beijing 100027，China
  • Received:1900-01-01 Revised:1900-01-01 Online:2012-08-01 Published:2012-08-01

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Abstract: In view of the difficulties the uncertainty of pore-pressure brought to the drilling engineering design and construction，
the concept of pore pressure uncertainty is present，and the calculation model for pore pressure uncertainty is derivated for Eaton
method. An example is analyzed using synthesis data from PG block in northeast Sichuan region. The method presented here
gives the range and main influencing factors of pore pressure uncertainty，and the influence law of related factors to uncertainty.
The calculated results are in correspondence with actual mud density and the results of gas production test，which proves that
the evaluation method of pore pressure uncertainty is feasible，the results has high accuracy and validity.

Key words: pore pressure, uncertainty, Eaton model, seismic velocity, acoustic travel time logging

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