蓬莱气区超深层古岩溶储层参数校正与有效性评价方法  

Parameter Calibration and Validity Evaluation Method for Ultra-Deep Paleokarst Reservoirs in Penglai Gas Area

作　　者：苗清 贺洪举 齐宝权 张文艺 何丽 罗宁 张树东 黄宏 赵娜 幸奠琼 赵广平 Miao Qing;He Hongju;Qi Baoquan;Zhang Wenyi;He Li;Luo Ning;Zhang Shudong;Huang Hong;Zhao Na;Xing Dianqiong;Zhao Guangping(Southwest Branch,China Petroleum Logging Co.,Ltd,Chongqing 400000,China;Geophysics and Oil Resources Institute,Yangtze University,Wuhan Hubei 430100,China;Material and Equipment Company,China Petroleum Logging Co.,Ltd.,Chongqing 400000,China;Material and Equipment Company,China Petroleum Logging Co.,Ltd.,Daqing Heilongjiang 163412,China)

机构地区：[1]中国石油测井有限公司西南分公司,重庆400000 [2]长江大学地球物理与石油资源学院,湖北武汉430100 [3]中国石油测井有限公司物资装备公司,重庆400000 [4]中国石油测井有限公司物资装备公司,黑龙江大庆163412

出　　处：《工程地球物理学报》2024年第4期672-680,共9页Chinese Journal of Engineering Geophysics

基　　金：中国石油重大科技专项(编号:2016E-0606)。

摘　　要：蓬莱含气区灯影组为四川盆地重要产能接替区,井深在6000~9000 m之间,属于超深层古岩溶缝洞性储层,储层储集空间类型多样,镜下见缝洞多被沥青、硅质等物质充填,受组构控制的粒间溶孔、粒内溶孔及不受组构控制的溶洞、溶缝、构造缝等发育,使得孔隙结构复杂,非均质性强,测井有效性识别存在较大难度。本文基于岩石物理实验对电阻率、声波时差、纵横波速度比等储层参数进行特殊矿物校正,通过刻度井对电成像拾取缝洞参数进行校正,最后基于测试资料,利用“一孔一包络一衰减一气测”构建了储层有效性综合评价指数,建立了储层有效性判别标准,有效储层判准率达95%以上,形成了超深层岩溶缝洞型储层有效性判别技术,可为该地区超深层测井解释提供技术保障。The lamp shadow group,situated within the Penglai gas-bearing area,serves as a pivotal successor zone for hydrocarbon production within the Sichuan Basin.With depths ranging from 6000 to 9000 meters,this geological formation delves into the realm of ultra-deep-seated ancient karstic-fractured reservoirs,marking a significant frontier in petroleum exploration and exploitation.Within these reservoirs,a diverse array of storage space types prevails,characterized by intricate pore networks and heterogeneity stemming from a myriad of geological processes.Microscopic examination reveals a complex diagenetic history,where fractures and fissures,commonly infilled with hydrocarbon-bearing fluids,asphalt,and silica,attest to the dynamic interplay of chemical dissolution and mineral precipitation.The genesis and evolution of these reservoirs are intricately governed by lithological controls,dictating the spatial distribution and connectivity of porosity and permeability networks.Lithological heterogeneity begets a mosaic of pore structures,ranging from microporosity within lithic grains to macroporosity manifested in dissolution cavities and fractures.Additionally,the presence of karstic dissolution caves,fractures,and fault-related conduits further complicates reservoir architecture and fluid flow pathways.In elucidating the complexities of these reservoirs,this study adopts an integrated approach,amalgamating rock physics experiments,advanced logging techniques,and seismic analysis.Specialized mineral corrections are applied to refine key reservoir parameters such as electrical resistivity,acoustic properties,and seismic attributes,enhancing the fidelity of subsurface characterization.Calibration wells serve as pivotal benchmarks for validating and calibrating logging responses,thereby facilitating the development of robust reservoir evaluation methodologies.Leveraging a comprehensive dataset,a holistic evaluation index of reservoir effectiveness is devised,furnishing a systematic framework for reservoir characterization

关 键 词：古岩溶 缝洞 基质孔隙度 黄铁矿 沥青 面孔率 有效性判别 

分 类 号：P631.8[天文地球—地质矿产勘探]