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

• 地质勘探 • 上一篇    下一篇

利用Eaton 法计算地层孔隙压力的不确定性分析

臧艳彬1,2,王瑞和2,王子振2,张锐2,何英明2,3   

  1. 1. 中国石化石油工程技术研究院,北京朝阳1001012. 中国石油大学(华东)石油工程学院,山东青岛2665553. 中海油研究总院,北京东城100027
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2012-08-01 发布日期:2012-08-01

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

摘要: 鉴于地层孔隙压力不确定性给钻井工程设计与施工带来的诸多困难,提出孔隙压力不确定度的概念,并对其不
确定性进行定量表征。以目前应用最为广泛的Eaton 法为例,推导了孔隙压力不确定度的理论计算模型,模型考虑了数
据测量误差、压实趋势线方程、Eaton 指数、上覆岩层压力以及静水压力等因素,并利用中国石化PG 地区综合矿场数据
进行了算例分析。结果表明,该方法给出了孔隙压力不确定度的范围、影响主因素以及相关因素对不确定度的影响规
律,且计算结果与录井钻井液密度、试气实测结果相符,证明提出的孔隙压力不确定性评价方法可行,计算结果真实、可
靠。

关键词: 地层孔隙压力, 不确定度, Eaton 法, 地震速度谱, 声波时差测井

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

中图分类号: