神狐海域天然气水合物测井-地震响应特征  

Logging-seismic response characteristics of natural gas hydrates in the Shenhu area,South China Sea

作　　者：贾培文 吕瑶瑶 苏丕波 袁胜 刘鹏奇 JIA Peiwen;LÜYaoyao;SU Pibo;YUAN Sheng;LIU Pengqi(College of Earth Science,Guilin University of Technology,Guilin,Guangxi 541004,China;Sanya Institute of South China Sea Geology,Guangzhou Marine Geological Survey,Sanya,Hainan 572025,China;National Engineering Research Center for Gas Hydrate Exploration and Development,Guangzhou Marine Geological Survey,China Geological Survey,Guangzhou,Guangdong 511458,China)

机构地区：[1]桂林理工大学地球科学学院,广西桂林541004 [2]中国地质调查局广州海洋地质调查局三亚南海地质研究所,海南三亚572025 [3]天然气水合物勘查开发国家工程研究中心,中国地质调查局广州海洋地质调查局,广东广州511458

出　　处：《地质学报》2024年第9期2654-2665,共12页Acta Geologica Sinica

基　　金：国家自然科学基金项目(编号42376222,U22A20581);海南省重点研发项目(编号ZDYF2024GXJS002)联合资助的成果。

摘　　要：天然气水合物储层分布特征及物性的准确评估直接影响天然气水合物资源量的估算,也是天然气水合物开发利用和环境影响研究的基础。本文基于神狐海域高精度三维地震和测井资料,探讨了水合物层、游离气层及共存层的测井-地震响应的综合判别方法。结果表明,通过叠后处理的地震剖面结合测井曲线分析,可准确判别W17站位的天然气水合物层与游离气层。在BSR上方为速度相对较高的水合物层,强振幅带、地层横向连续性差,具有高电阻率和速度等响应特征;而在下方则聚集低速游离气层,低频、弱振幅带,具有低电阻率和速度等响应特征。本研究对于水合物储层识别、资源评价及勘查试采等决策提供依据和重要参考。Accurate evaluation of the distribution characteristics and physical properties of gas hydrate reservoirs is crucial for estimating gas hydrate resources,guiding development and utilization strategies,and understanding environmental impacts.Based on high-precision 3D seismic and well-logging data acquired in the Shenhu area,this paper presents a comprehensive method for discriminating between hydrate layers,free gas layers,and coexistence layers using integrated logging-seismic responses.Our results show that the gas hydrate layer and free gas layer at the W17 station can be accurately identified by combining post-stack seismic profiles with detailed analysis of logging curves.Above the BSR,a hydrate layer is characterized by relatively high seismic velocity,strong amplitude reflections,poor transverse continuity,and high resistivity and velocity values.In contrast,the underlying free gas layer exhibits low seismic velocity,low-frequency weak amplitude reflections,and low resistivity and velocity values.This study provides a robust basis and valuable reference for informed decision-making regarding gas hydrate reservoir identification,resource evaluation,exploration,and trial production activities.

关 键 词：神狐海域 天然气水合物 地震反射 测井 响应特征 

分 类 号：P618.13[天文地球—矿床学] P631[天文地球—地质学]