三维相控量化流动单元体系建立——以山2低渗天然气储层为例  

Establishment of Quantitative Flow Unit System in Three-dimensional Geological Model Controlled by Facies——A Case Study of Shan2 Low-permeability Gas Reservoir

作　　者：张新春 张洪 杨兴利[1] 李相方 Zhang Xinchun;Zhang Hong;Yang Xingli;Li Xiangfang(Baota Oil Production Plant,Shaanxi Yanchang Petroleum(Group)Co.,Ltd.,Yan'an Shaanxi 7160000;State Key Laboratory of Petroleum Resources and Prospecting,China University of Petroleum(Beijing),Beijing 102249;College of Petroleum Engineering,China University of Petroleum(Beijing),Beijing 102249)

机构地区：[1]延长油田宝塔采油厂,陕西延安716000 [2]中国石油大学(北京)油气资源与探测国家重点实验室,北京102249 [3]中国石油大学(北京)石油工程学院,北京102249

出　　处：《中外能源》2019年第11期43-50,共8页Sino-Global Energy

基　　金：国家重大自然基金项目“页岩油气高效开发基础理论”(项目编号：51490654)资助

摘　　要：本研究利用建模的方法提供了三维流动单元量化体系,为油气有效开发提供了重要依据。分析整理子洲气田200余口井测井资料,形成构造模型、沉积相模型,分析整理、计算了气田代表井孔隙度、渗透率和流动带指数,将流动带指数植入属性模块,经过数据分析和建模不同过程,建立了由沉积相控制、以构造模型为格架的三维流动带指数模型,同时分析了不同时期流动单元分布状况及与沉积相的关系。结果表明,山23、山22、山21三个不同时期,主力储层分别可以划分为8、7、6个流动单元,不同时期流动单元分布严格受沉积相控制,主河道轴线和心滩部分形成了1类流动单元带,主要由1类流动单元和2类流动单元构成,物性好,流动性能极佳,是主要储气和高产部位;河道边缘天然堤、决口扇、废弃河道及泛滥平原构成了边缘流动单元带,主要由3类和少量2类流动单元构成,流动性差,分割性强,含有较多剩余气。可以利用三维流动单元体系进行加密井优选、井网井距调整及剩余气研究。Three-dimensional quantitative flow unit system is set up by geological modeling,which supplies the important evidence for the effective oil and gas development.Tectonic and sedimentary facies models are formed based on the analysis and arrangement of logging data for more than 200 wells in Zizhou Gas Field.The porosity,permeability as well as the flow zone index of the representative wells in the gas field is calculated.Then the flow zone index is input into the attribute module of the software.Through data analysis and modeling,three-dimensional flow zone index model is set up,which is controlled by sedimentary facies and framed by tectonic model.The relationship between the flow unit distribution at different periods and sedimentary facies is analyzed.The results show that the major reservoirs of the gas field can be divided into 8,7 and 6 flow units respectively during Shan23,Shan22 and Shan21 three periods.The distribution of the flow units at various stages is controlled by the sedimentary facies stringently.The axis of main channel and central bar belong to the Class 1 flow unit zone,which are composed of Class 1 and Class 2 flow units.They have good reservoir physical properties and are easy to flow,therefore they have lots of gas reserves and high production.Natural levees,crevasse fans,abandoned channels and flood plains at the edge of the channel make of the margin flow unit zone,which consists of Class 3 and few Class 2 flow units.They are poor flowability,strong divisibility and have a lot of residual gas.Three-dimensional flow unit system can be used to select infilling wells,adjust well spacing and well pattern as well as study residual gas.

关 键 词：流动带指数 三维量化流动单元体系 山2低渗储层 天然气 相控地质模型 

分 类 号：P61[天文地球—矿床学]