新疆石油地质

新疆石油地质 ›› 2004, Vol. 25 ›› Issue (5): 544-545.

• 应用技术 • 上一篇    下一篇

三次样条插值在排驱压力计算中的应用

胡罡1, 陆正元1, 罗平2   

  1. 1.成都理工大学油气藏地质及开发工程国家重点实验室,四川 成都 610059;
    2.中国石油石油勘探开发科学研究院,北京 100083
  • 收稿日期:2003-11-07 修回日期:2004-02-10 发布日期:2021-01-13
  • 作者简介:胡罡(1978-),男,湖北英山人,在读硕士研究生,油气田开发。联系电话:010-62098622
  • 基金资助:
    国家973项目,国家重点基础研究发展规划（编号：1999043311）

Application of Cubic Spline Interpolating Function to Calculation of Drainage Capillary Pressure

HU Gang1, LU Zheng-yuan1, LUO Ping2   

  1. 1. State Key Laboratory of Hydrocarbon Reservoir Geology and Development Engineering, Chengdu University of Technology, Chengdu, Sichuan 610059, China;
    2. Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083, China
  • Received:2003-11-07 Revised:2004-02-10 Published:2021-01-13

PDF

222

摘要： 对于川东北部罗 家寨气田飞仙关组鲕滩储集层的非均质性致密岩样及次生作用强烈的碳酸盐岩样品,用压汞法作的毛管压力曲线,多数没有明显的平坦直线段,很难精确作出切线,求取排驱压力。为此,提出了一种利用三次样条插值函数计算排驱压力的新方法。该方法应用三次样条插值拟合毛管压力与其对应的汞饱和度,使求取排驱压力的问题转化为求取毛管压力曲线初始拐点的问题。该方法不但程序设计简单、使用方便、原理符合定义,而且适合于各种形态的毛管压力曲线。

关键词: 压汞试验, 门限压力(排驱压力), 插值法

Abstract: Many mercury-injection capillary pressure curves, which inferred from the samples of compacted and intense secondary carbonate rocks in Luojiazhai gas field, northeastern Sichuan, China, have not very good horizontal line segments. Thus, it is not easy to get the data of drainage capillary pressure. A new way to answer this problem is put forward. That is using cubic spline interpolating data to match the capil-lary pressure and its corresponding mercury saturation, enabling determination of the drainage capillary pressure to become getting the first turning point of mercury-injection capillary pressure curve. The method is not only accordant with the definition of capillary pressure curves, easy io use. but also fits the calculation of any morph ologic capillary oressure curve.

Key words: mercury injection experiment, threshold pressure (drainage capillary pressure), interpolation

中图分类号: