基于长源距探测器的D-T中子源快中子截面测井数值模拟研究

宋孝雨; 吴文圣; 张浩宇; 何丽娜; 熊世涛; 付新月; 王港

doi:10.3724/j.0253-3219.2025.hjs.48.240502

您当前的位置：

首页 >

文章列表页 >

基于长源距探测器的D-T中子源快中子截面测井数值模拟研究

加速器技术、射线技术及应用 | 更新时间：2025-11-27

- 基于长源距探测器的D-T中子源快中子截面测井数值模拟研究
- Numerical simulation study of fast neutron cross section logging using D-T neutron source with long source distance detector
- 核技术 2025年48卷第11期文章编号：110201
- 作者机构：
  
  1.（油气资源与工程全国重点实验室中国石油大学（北京）北京 102249）
  2.中国石油天然气股份有限公司长庆油田分公司第三采气厂鄂尔多斯 017300
  3.中国石油集团测井有限公司西安 710077
  4.中国石油长庆油田公司西安 710018
- 作者简介：
  
  宋孝雨，男，1997年出生，2021年毕业于中国石油大学（北京），现为博士研究生，研究方向为中子截面测井
  吴文圣，E-mail：wwsheng@cup.edu.cn
- 基金信息：
- DOI：10.3724/j.0253-3219.2025.hjs.48.240502
  中图分类号： TL99;P631.8⁺17
- 收稿：2024-12-08，
  
  修回：2025-02-19，
  
  纸质出版：2025-11-15
- 稿件说明：
移动端阅览
宋孝雨,吴文圣,张浩宇等.基于长源距探测器的D-T中子源快中子截面测井数值模拟研究[J].核技术,2025,48(11):110201.

SONG Xiaoyu,WU Wensheng,ZHANG Haoyu,et al.Numerical simulation study of fast neutron cross section logging using D-T neutron source with long source distance detector[J].NUCLEAR TECHNIQUES,2025,48(11):110201.
宋孝雨,吴文圣,张浩宇等.基于长源距探测器的D-T中子源快中子截面测井数值模拟研究[J].核技术,2025,48(11):110201. DOI： 10.3724/j.0253-3219.2025.hjs.48.240502. CSTR： 32193.14.hjs.CN31-1342/TL.2025.48.240502.

SONG Xiaoyu,WU Wensheng,ZHANG Haoyu,et al.Numerical simulation study of fast neutron cross section logging using D-T neutron source with long source distance detector[J].NUCLEAR TECHNIQUES,2025,48(11):110201. DOI： 10.3724/j.0253-3219.2025.hjs.48.240502. CSTR： 32193.14.hjs.CN31-1342/TL.2025.48.240502.

摘要

快中子截面（Fast Neutron Cross Section，FNXS）测井在致密气藏评价与二氧化碳地质封存监测中发挥着重要作用，其测量精度与探测特性主要由长探测器的源距决定。基于实际多探测器脉冲中子测井仪器参数，采用蒙特卡罗数值模拟方法，研究了不同长源距选取对FNXS测量精度的影响。同时，参考斯伦贝谢脉冲星仪器，建立了三探测器脉冲中子测井仪器模型，并分析了源距分别为30 cm、60 cm和90 cm时的探测深度和纵向分辨率。研究结果表明：FNXS测量的最佳长源距范围为85~115 cm，并且随着源距的增大，探测深度逐渐增大，而纵向分辨率逐渐减小；当源距为90 cm时，对应的探测深度和纵向分辨率分别为22 cm和76.2 cm。本研究为进一步提高FNXS测量精度并优化仪器结构提供了理论支持与关键参数参考。

Abstract

Background

Fast neutron cross section (FNXS) logging plays a crucial role in evaluating tight gas reservoirs and monitoring carbon dioxide geological sequestration. The accuracy and detection characteristics of FNXS logging are primarily influenced by the source-to-detector distance of the long detector.

Purpose

This study aims to optimize the source-to-detector distance for the long detector in FNXS logging and analyze the impact of different source-to-detector distances on its detection characteristics.

Methods

Firstly

utilizing the actual parameters of a multi-detector pulsed neutron logging tool

a Monte Carlo numerical simulation method was employed to analyze the gamma response of gas layers at various source-to-detector distances. Then

based on FNXS measurement sensitivity and error analysis

the optimal range for the long detector's source-to-detector distance was determined. Finally

a three-detector pulsed neutron tool model

based on Schlumberger's Pulsar tool

was constructed to analyze the detection depth and vertical resolution at source-to-detector distances of 30 cm

60 cm

and 90 cm.

Results

Calculation results indicate that the optimal range for the long detector's source-to-detector distance in FNXS logging is between 85 cm and 115 cm. As the source-to-detector distance increases

the detection depth increases while the vertical resolution decreases. At a source-to-detector distance of 90 cm

the detection depth and vertical resolution are 22 cm and 76.2 cm

respectively. Moreover

the increased detection depth of the long detector makes it suitable for measurements in cased holes but unsuitable for thin-layer measurements.

Conclusions

Simulation results of this study provide theoretical support and key parameter references for enhancing FNXS measurement accuracy and optimizing instrument design. The optimal source-to-detector distance range of 85~115 cm balances measurement sensitivity and statistical error

while the trade-off between detection depth and vertical resolution must be considered based on specific application requirements.

关键词

Keywords

references

Chen Q , Zhang F , Qiu F , et al . Quantitatively determining gas content using pulsed neutron logging technique in closed gas reservoir [J ] . Journal of Petroleum Science and Engineering , 2021 , 198 : 108149 . DOI: 10.1016/j.petrol. 2020.108149 http://dx.doi.org/10.1016/j.petrol.2020.108149 .

Li H B , Zhang J J , Gao Q , et al . Quantitative prediction of porosity and gas saturation based on a new dual-porosity rock-physics model and Shuey's Poisson ratio for tight sandstone reservoirs [J ] . Journal of Petroleum Science and Engineering , 2022 , 216 : 110826 . DOI: 10.1016/j.petrol. 2022.110826 http://dx.doi.org/10.1016/j.petrol.2022.110826 .

付新月 , 吴文圣 , 张恒荣 , 等 . 基于三维空间响应分布函数的脉冲中子孔隙度测井快速模拟 [J ] . 天然气工业 , 2022 , 42 ( 3 ): 41 – 49 . DOI: 10.3787/j.issn.1000-0976.2022.03.005 http://dx.doi.org/10.3787/j.issn.1000-0976.2022.03.005 .

FU Xinyue , WU Wensheng , ZHANG Hengrong , et al . Fast simulation of pulsed neutron porosity logging based on three-dimensional spatial response distribution function [J ] . Natural Gas Industry , 2022 , 42 ( 3 ): 41 – 49 . DOI: 10.3787/j.issn.1000-0976.2022.03.005 http://dx.doi.org/10.3787/j.issn.1000-0976.2022.03.005 .

武蕙琳 , 李雨莲 , 金亚 , 等 . 基于数值模拟的X射线密度测井仪器源距设计 [J ] . 核技术 , 2022 , 45 ( 10 ): 100402 . DOI: 10.11889/j.0253-3219.2022.hjs.45.100402 http://dx.doi.org/10.11889/j.0253-3219.2022.hjs.45.100402 .

WU Huilin , LI Yulian , JIN Ya , et al . A design of source spacing of the X-ray density logging tool based on numerical simulation [J ] . Nuclear Techniques , 2022 , 45 ( 10 ): 100402 . DOI: 10.11889/j.0253-3219.2022.hjs.45.100402 http://dx.doi.org/10.11889/j.0253-3219.2022.hjs.45.100402 .

杨宁宁 , 张宇昕 , 于华伟 . 基于γ射线宽束衰减模型的密度测井方法研究 [J ] . 核技术 , 2020 , 43 ( 5 ): 050502 . DOI: 10.11889/j.0253-3219.2020.hjs.43.050502 http://dx.doi.org/10.11889/j.0253-3219.2020.hjs.43.050502 .

YANG Ningning , ZHANG Yuxin , YU Huawei . Study on density logging method based on γ-ray broad beam attenuation model [J ] . Nuclear Techniques , 2020 , 43 ( 5 ): 050502 . DOI: 10.11889/j.0253-3219.2020.hjs.43.050502 http://dx.doi.org/10.11889/j.0253-3219.2020.hjs.43.050502 .

于华伟 , 孙建孟 , 杨锦舟 . 氘-氘和氘-氚随钻中子孔隙度测井探测特性对比 [J ] . 中国石油大学学报(自然科学版) , 2009 , 33 ( 6 ): 41 – 45 . DOI: 10.3321/j.issn:1673-5005.2009.06.009 http://dx.doi.org/10.3321/j.issn:1673-5005.2009.06.009 .

YU Huawei , SUN Jianmeng , YANG Jinzhou . Comparison of D-T and D-D accelerator investigation characteristics in pulsed neutron porosity logging while drilling [J ] . Journal of China University of Petroleum (Edition of Natural Science) , 2009 , 33 ( 6 ): 41 – 45 . DOI: 10.3321/j.issn:1673-5005.2009.06.009 http://dx.doi.org/10.3321/j.issn:1673-5005.2009.06.009 .

张锋 , 袁超 . 利用D-D中子发生器进行补偿中子孔隙度测井的模拟研究 [J ] . 测井技术 , 2010 , 34 ( 3 ): 227 – 232 . DOI: 10.16489/j.issn.1004-1338.2010.03.004 http://dx.doi.org/10.16489/j.issn.1004-1338.2010.03.004 .

ZHANG Feng , YUAN Chao . Monte Carlo simulation on compensated neutron porosity logging with D-D neutron generator [J ] . Well Logging Technology , 2010 , 34 ( 3 ): 227 – 232 . DOI: 10.16489/j.issn.1004-1338.2010.03.004 http://dx.doi.org/10.16489/j.issn.1004-1338.2010.03.004 .

李瑞 , 吴文圣 . 基于SSA-XGBoost模型的高精度密度测井预测方法研究 [J ] . 核技术 , 2024 , 47 ( 12 ): 120502 . DOI: 10.11889/j.0253-3219.2024.hjs.47.120502 http://dx.doi.org/10.11889/j.0253-3219.2024.hjs.47.120502 .

LI Rui , WU Wensheng . SSA-XGBoost model based high-precision density prediction method for well logging [J ] . Nuclear Techniques , 2024 , 47 ( 12 ): 120502 . DOI: 10.11889/j.0253-3219.2024.hjs.47.120502 http://dx.doi.org/10.11889/j.0253-3219.2024.hjs.47.120502 .

李巽 , 吴文圣 , 董夺 . C/O与C/H测井响应的数值模拟对比研究 [J ] . 核技术 , 2024 , 47 ( 4 ): 040501 . DOI: 10.11889/j.0253-3219.2024.hjs.47.040501 http://dx.doi.org/10.11889/j.0253-3219.2024.hjs.47.040501 .

LI Xun , WU Wensheng , DONG Duo . Comparative study on numerically simulated C/O and C/H logging responses [J ] . Nuclear Techniques , 2024 , 47 ( 4 ): 040501 . DOI: 10.11889/j.0253-3219.2024.hjs.47.040501 http://dx.doi.org/10.11889/j.0253-3219.2024.hjs.47.040501 .

张锋 , 韩忠悦 , 吴赫 , 等 . 随钻脉冲中子伽马密度测井最佳源距的优化设计 [J ] . 同位素 , 2016 , 29 ( 2 ): 93 – 97 . DOI: 10.7538/tws.2016.29.02.0093 http://dx.doi.org/10.7538/tws.2016.29.02.0093 .

ZHANG Feng , HAN Zhongyue , WU He , et al . Optimized design of spacing in pulsed neutron gamma density logging while drilling [J ] . Journal of Isotopes , 2016 , 29 ( 2 ): 93 – 97 . DOI: 10.7538/tws.2016.29.02.0093 http://dx.doi.org/10.7538/tws.2016.29.02.0093 .

Hughes B , McGlynn I , Anniyev T , et al . Development and baseline comparison of a new pulsed-neutron spectroscopy tool for carbon- oxygen analysis and three-phase saturation monitoring [C ] . SPWLA 64th Annual Symposium Transactions. Society of Petrophysicists and Well Log Analysts , 2023 : D031S002 R 001 . DOI: 10.30632/spwla-2023-0007 http://dx.doi.org/10.30632/spwla-2023-0007 .

Laronga R , Swager L , Bustos U . Time-lapse pulsed-neutron logs for carbon capture and sequestration: practical learnings and key insights [J ] . Petrophysics – the SPWLA Journal of Formation Evaluation and Reservoir Description , 2023 , 64 ( 5 ): 680 – 699 . DOI: 10.30632/pjv64n5-2023a5 http://dx.doi.org/10.30632/pjv64n5-2023a5 .

Kim Y , Akagbosu P , Ndokwu C , et al . Three-phase saturation evaluation utilizing multidetector pulsed neutron logging in freshwater environments: a guide for sidetrack drilling optimization [C ] . SPE Nigeria Annual International Conference and Exhibition. August 5 - 7 , 2024 . Lagos, Nigeria. SPE , 2024 : 221716 . DOI: 10.2118/221716-ms http://dx.doi.org/10.2118/221716-ms .

Raeesi B , Cedillo G , Han X , et al . Expanding application of multi-detector pulsed neutron instrumentation for quantitative gas saturation monitoring in gas-filled boreholes [C ] . SPWLA 58th Annual Logging Symposium , 2017 .

Ansari R , Mekic N , Chace D , et al . Field applications of a new cased hole gas saturation measurement in tight gas reservoirs [C ] . SPWLA 50th Annual Logging Symposium 2009 .

Fondyga T , Han X , Webster M , et al . Extending the range of multidetector pulsed neutron logging and nuclear modelling applications for reservoir surveillance in the columbus basin [C ] . SPWLA 57th Annual Logging Symposium , 2016 .

Kim Y , Chace D . Simultaneous solution of three-phase formation fluid saturations using triangulation of multidetector pulsed neutron measurements [C ] . International Petroleum Technology Conference. Bangkok, Thailand. International Petroleum Technology Conference , 2016 . DOI: 10.2523/18687-ms http://dx.doi.org/10.2523/18687-ms .

Liu J T , Liu S C , Zhang F , et al . A method for evaluating gas saturation with pulsed neutron logging in cased holes [J ] . Journal of Natural Gas Science and Engineering , 2018 , 59 : 354 – 362 . DOI: 10.1016/j.jngse.2018.09.018 http://dx.doi.org/10.1016/j.jngse.2018.09.018 .

Mekic N , McIlroy C , Hill F , et al . Multidetector pulsed-neutron technology for low-porosity reservoir-interpretation methodology [C ] . SPWLA 57th Annual Logging Symposium , 2016 .

Zhang F , Liu J T , Yuan C . Monte Carlo simulation for determining gas saturation using three-detector pulsed neutron logging technology in tight gas reservoir and its application [J ] . Applied Radiation and Isotopes , 2013 , 78 : 51 – 56 . DOI: 10.1016/j.apradiso.2013.03.092 http://dx.doi.org/10.1016/j.apradiso.2013.03.092 .

Rose D , Zhou T , Beekman S , et al . An innovative slim pulsed neutron logging tool [C ] . SPWLA 56th Annual Logging Symposium , 2015 .

Zhou T , Rose D , Quinlan T , et al . Fast neutron cross-section measurement physics and applications [C ] . SPWLA 57th Annual Logging Symposium , 2016 .

Carpenter C . Pulsed-neutron comparison of open- and casedhole wells: an Alaskan case study [J ] . Journal of Petroleum Technology , 2018 , 70 ( 8 ): 54 – 56 . DOI: 10.2118/0818-0054-jpt http://dx.doi.org/10.2118/0818-0054-jpt .

Li H , Zhang X , Guo H , et al . A new measurement of evaluating gas or CO 2 in formation - fast neutron cross section [C ] . SPWLA 25th Formation Evaluation Symposium of Japan , 2019 .

Fu X Y , Wu W S , Wang H , et al . A new method of gas reservoir evaluation based on neutron cross section logging [J ] . Journal of Petroleum Science and Engineering , 2022 , 208 : 109750 . DOI: 10.1016/j.petrol.2021.109750 http://dx.doi.org/10.1016/j.petrol.2021.109750 .

范继林 , 张锋 , 田立立 , 等 . 二氧化碳气驱稠油层脉冲中子含气量监测方法 [J ] . 石油勘探与开发 , 2021 , 48 ( 6 ): 1232 – 1240 . DOI: 10.11698/PED.2021.06.15 http://dx.doi.org/10.11698/PED.2021.06.15 .

FAN Jilin , ZHANG Feng , TIAN Lili , et al . A method of monitoring gas saturation in carbon dioxide injection heavy oil reservoirs by pulsed neutron logging technology [J ] . Petroleum Exploration and Development , 2021 , 48 ( 6 ): 1232 – 1240 . DOI: 10.11698/PED.2021.06.15 http://dx.doi.org/10.11698/PED.2021.06.15 .

黄隆基 . 核测井原理: 光子——中子——核磁 [M ] . 东营 : 石油大学出版社 , 2000 .

HUANG Longji . Principle of nuclear logging: photon-neutron-nuclear magnetic resonance [M ] . China University of Petroleum Press , 2000 .

Chadwick M B , Herman M , Obložinský P , et al . ENDF/B-VII.1 nuclear data for science and technology: cross sections, covariances, fission product yields and decay data [J ] . Nuclear Data Sheets , 2011 , 112 ( 12 ): 2887 – 2996 . DOI: 10.1016/j.nds.2011.11.002 http://dx.doi.org/10.1016/j.nds.2011.11.002 .

Fitz D . Evolution of casedhole nuclear surveillance logging through time [J ] . Petrophysics – the SPWLA Journal of Formation Evaluation and Reservoir Description , 2023 , 64 ( 4 ): 473 – 501 . DOI: 10.30632/pjv64n4-2023a1 http://dx.doi.org/10.30632/pjv64n4-2023a1 .

Luycx M . Simulation of borehole nuclear measurements: a practical tutorial guide for implementation of Monte Carlo methods and approximations based on flux sensitivity functions [J ] . Petrophysics – the SPWLA Journal of Formation Evaluation and Reservoir Description , 2020 , 61 ( 1 ): 4 – 36 . DOI: 10.30632/pjv61n1-2020t1 http://dx.doi.org/10.30632/pjv61n1-2020t1 .

Luycx M , Torres-Verdín C . Physics, applications, and limitations of borehole neutron-gamma density measurements [J ] . Geophysics , 2019 , 84 ( 1 ): D39 – D56 . DOI: 10.1190/geo2018-0088.1 http://dx.doi.org/10.1190/geo2018-0088.1 .

葛云龙 , 骆庆锋 , 赵鹏飞 , 等 . 随钻D-D源中子孔隙度测井数值模拟 [J ] . 测井技术 , 2022 , 46 ( 5 ): 517 – 522 . DOI: 10.16489/j.issn.1004-1338.2022.05.003 http://dx.doi.org/10.16489/j.issn.1004-1338.2022.05.003 .

GE Yunlong , LUO Qingfeng , ZHAO Pengfei , et al . Numerical simulation of D-D source neutron porosity logging while drilling [J ] . Well Logging Technology , 2022 , 46 ( 5 ): 517 – 522 . DOI: 10.16489/j.issn.1004-1338.2022.05.003 http://dx.doi.org/10.16489/j.issn.1004-1338.2022.05.003 .

浏览量

下载量

CSCD

文章被引用时，请邮件提醒。

提交

工具集

关联资源

基于高纯锗探测器表面点探测效率数据库的无源效率刻度

就地γ能谱测量中核素活度转化系数计算方法研究

涂硼电离室中子探测性能的FLUKA模拟研究

外照射光子束小野射野输出修正因子的蒙特卡罗模拟研究

桶装放射性废物中子测量系统探测效率校正方法研究