中子孔隙度测井灵敏度影响因素分析

于华伟; 周悦; 陈翔鸿; 王志刚

doi:10.11889/j.0253-3219.2018.hjs.41.020502

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中子孔隙度测井灵敏度影响因素分析

核物理、交叉学科研究 | 更新时间：2021-05-19

- 中子孔隙度测井灵敏度影响因素分析
- Analysis of factors affecting the sensitivity of neutron porosity logging
- 核技术 2018年41卷第2期文章编号：020502
- 作者机构：
  
  1.中国石油大学(华东) 青岛 266580
  2.海洋国家实验室海洋矿产资源评价与探测技术功能实验室青岛 266071
  3.长庆油田分公司第六采气厂西安 710000
- 作者简介：
  
  [ "于华伟, 男, 1981年出生, 2011年于中国石油大学(华东)获博士学位, 研究领域为核测井新方法及蒙特卡罗模拟", "YU Huawei, male, born in 1981, graduated from China University of Petroleum (Hua dong) with a doctoral degree in 2011, focusing on new method for nuclear logging and MCNP" ]
- 基金信息：
  
  国家自然科学基金(41674129);国家科技重大专项(2017ZX05009001);国家重点研发计划(2016YFC0302900);中央高校基本科研业务费(14CX02182A);中央高校基本科研业务费(16CX02039A);中国石油大学教学改革项目(SY-A201405)
- DOI：10.11889/j.0253-3219.2018.hjs.41.020502
  中图分类号： P631.81
- 收稿日期：2017-10-19，
  
  修回日期：2017-11-29，
  
  纸质出版日期：2018-02-10
- 稿件说明：
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于华伟, 周悦, 陈翔鸿, 等. 中子孔隙度测井灵敏度影响因素分析[J]. 核技术, 2018,41(2):020502

Huawei YU, Yue ZHOU, Xianghong CHEN, et al. Analysis of factors affecting the sensitivity of neutron porosity logging[J]. Nuclear techniques, 2018, 41(2): 020502
于华伟, 周悦, 陈翔鸿, 等. 中子孔隙度测井灵敏度影响因素分析[J]. 核技术, 2018,41(2):020502 DOI： 10.11889/j.0253-3219.2018.hjs.41.020502.

Huawei YU, Yue ZHOU, Xianghong CHEN, et al. Analysis of factors affecting the sensitivity of neutron porosity logging[J]. Nuclear techniques, 2018, 41(2): 020502 DOI： 10.11889/j.0253-3219.2018.hjs.41.020502.

摘要

可控源替代中子孔隙度测井中的同位素中子源已经成为石油勘探发展的必然趋势。为了提高中子孔隙度测井中可控源替代同位素中子源的兼容性与测量精度，本文针对影响地层孔隙度灵敏度的因素进行分析。首先，根据中子孔隙度响应的理论公式，推导出地层孔隙度灵敏度的响应方程，然后对其进行分析并得出影响灵敏度的各种因素。结果表明，地层中的中子减速长度对地层灵敏度变化起到主要影响作用，另外减速长度受到了源类型及能量、孔隙度、岩性、密度等因素的影响，其中中子能量和岩石密度是影响灵敏度变化的主要因素。本研究为今后可控源中子孔隙度测井的研究提供了理论依据。

Abstract

Background

It has become an inevitable trend to use controlled source instead of isotope neutron source in neutron porosity logging for petroleum exploration

and the availability of measurement results is determined by formation sensitivity

which is required to be of a certain standard.

Purpose

This study aims to improve the compatibility and measurement accuracy of the controlled source for neutron porosity logging.

Methods

First of all

the response equation of formational porosity sensitivity is derviated according to the theoretical formula of neutron porosity logging's response

then the Schlumberger Nuclear Parameter (SNUPAR) program is applied to analysis of its adaptability and factors affecting the sensitivity of neutron porosity logging.

Results

Computaional results show that the deceleration length of neutron is the main role to the change of sensitivity

and the deceleration length is affected by source type and its energy

porosity

lithology

and density. And the neutron energy and rock density are the main factors that affect the sensitivity change.

Conclusion

This study provides a theoretical basis for the further study of controlled source neutron porosity logging.

关键词

Keywords

references

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于华伟. 随钻环境下脉冲中子测量地层密度的理论基础研究[D]. 东营: 中国石油大学地球科学与技术学院, 2011. http://cdmd.cnki.com.cn/Article/CDMD-10425-1011286340.htm

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