石油与天然气地质 ›› 2007, Vol. 28 ›› Issue (3): 395-400,389.doi: 10.11743/ogg20070314

• 方法技术 • 上一篇    下一篇

地层孔隙压力预测新方法

魏茂安1, 陈潮2, 王延江2, 马海2   

  1. 1. 中国石化, 胜利油田有限公司钻井工艺研究院信息中心, 山东, 东营, 257017;
    2. 中国石油大学, 信息与控制工程学院, 山东, 东营, 257061
  • 收稿日期:2006-09-06 出版日期:2007-06-25 发布日期:2012-01-16
  • 基金资助:

    中国石化重大科技项目(JP04014).

New approach for pore pressure prediction

Wei Maoan1, Chen Chao2, Wang Yanjiang2, Ma Hai2   

  1. 1. Drilling Technology Research Institute, Shengli Petroleum Administration Bureau, SINOPEC, DongYing, Shandong 257017;
    2. School of Information and Control Engineering, China University of Petroleum, DongYing, Shandong 257061
  • Received:2006-09-06 Online:2007-06-25 Published:2012-01-16

PDF (PC)

675

被引次数

32

摘要：

在分析地层孔隙压力预测传统方法局限性的基础上,提出了一种基于有效应力定理和声波速度模型的地层孔隙压力预测方法。由相关测井资料计算泥质含量、孔隙度和声波速度,通过支撑向量回归机计算垂直有效应力,密度测井资料计算上覆岩层压力,最后根据有效应力定理计算地层孔隙压力。实例分析表明,该方法用于预测砂泥岩及欠压实成因的异常地层压力是可行的。与传统方法相比,该方法不需要建立正常压实趋势线,有较好的适应性和预测精度。

关键词: 地层孔隙压力, 支撑向量回归机, 声波速度, 孔隙度, 泥质含量, 垂直有效应力

Abstract:

By analyzing the limitations of the traditional pore pressure prediction methods,a new pore pressure prediction approach based on the effective stress theorem and the acoustic velocity model is proposed.It first calculates clay content,porosity,and acoustic velocity with relevant log data,and then calculates vertical effective stress by using Support Vector Machines for Regression and the overburden pressure with density log data,and finally calculate formation pore pressure by the effective pressure theorem.Practical application of the approach shows that it is feasible in prediction of abnormal formation pressure of sandstone and shale caused by undercompaction.Compared with traditional pore pressure prediction methods,the approach does not require establishing normal compaction trend line and has better adaptability and higher accuracy of predictions.

Key words: pore pressure, support vector machine for regression, sonic velocity, porosity, shale content, vertical effective stress

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