石油勘探与开发2026，Vol.53Issue(4)：839-848,10.DOI:10.11698/PED.20250590
基于能谱-时间谱耦合脉冲中子测井的深层潜山低孔储层流体识别方法
A fluid identification method for deep low-porosity buried-hill reservoirs based on coupled energy spectrum-time spectrum pulsed neutron logging
摘要
Abstract
This work addresses the challenge of fluid identification in complex low-porosity buried-hill reservoirs in the Bohai Sea by developing a fluid identification method based on the coupled responses of energy spectra and time spectra.First,a regularized spectral decomposition algorithm is employed to analyze pulsed neutron gamma-ray spectra and obtain the carbon-to-oxygen(C/O)yield ratio,enhancing the capability of quantitatively characterizing differences in oil and water signal responses under low-porosity conditions.Second,an oil-water identification method is established by integrating energy-spectrum and time-spectrum parameters,improving the accuracy of oil-water discrimination in complex lithological environments.Finally,a gas layer identification parameter is introduced to distinguish gas-bearing zones and fluid-bearing zones,which is then combined with the oil and water identification results to form a three-phase fluid identification workflow.Field applications in drilled wells penetrating granite gneiss buried hills and carbonate buried-hill reservoirs in the Bohai Sea demonstrate that the proposed method significantly enhances the response contrast between oil and water under low-porosity conditions,substantially reduces the uncertainty of single-parameter interpretation,and enables accurate discrimination among oil,gas,and water.The method provides an effective solution for fluid identification in complex low-porosity buried-hill reservoirs in the Bohai Sea.关键词
脉冲中子/能谱-时间谱耦合/深层潜山/流体识别/油气水识别/油气检测/测井解释/渤海海域Key words
pulsed neutron/energy spectrum-time spectrum coupling/deep buried-hill reservoir/fluid identification/oil-gas-water identification/hydrocarbon detection/well-log interpretation/Bohai Sea分类
能源科技引用本文复制引用
张琼,张嘉伟,李珍阳,李疾翎,徐大年,张璋,范继林,伍光祖,尚捷..基于能谱-时间谱耦合脉冲中子测井的深层潜山低孔储层流体识别方法[J].石油勘探与开发,2026,53(4):839-848,10.基金项目
国家自然科学基金"基于X射线成像的油气环保勘探技术新理论新方法研究"(U23B20151) （U23B20151）
中海油服油田技术研究院科学研究与技术开发项目(202405FKY00238) （202405FKY00238）
