VSP井控高分辨率处理技术在页岩油开发中的应用  

Application of VSP-based well-controlled high-resolution processing technology in shale oil development

作　　者：张欣吉 毛海波[1] 李晓峰[1] 林娟[1] 蒋立[1] ZHANG Xinji;MAO Haibo;LI Xiaofeng;LIN Juan;JIANG Li(Institute of Geophysics,Research Institute of Exploration and Development,Xinjiang Oilfield Company,PetroChina,Urumqi,Xinjiang 830013,China)

机构地区：[1]中国石油新疆油田公司勘探开发研究院地球物理研究所,新疆乌鲁木齐830013

出　　处：《石油地球物理勘探》2022年第S02期9-15,223,共8页Oil Geophysical Prospecting

摘　　要：准噶尔盆地吉木萨尔凹陷二叠系芦草沟组页岩油储量规模大,已具备有效建产的资源基础。该区开发以水平井为主,但是老地震资料信噪比、分辨率较低,存在微幅度构造成像精度低、小断裂和薄油层难以有效识别及油层钻遇率难以保障等问题,需要以高精度三维地震采集、处理、解释技术为支撑解决上述问题,提高水平井油层钻遇率。VSP技术是一种面向油气田开发的地球物理技术,通过VSP资料提取吸收衰减、速度、频率等参数,并与地面地震处理结果相结合,可提高地震资料成像精度,为准确落实构造、提高甜点识别的分辨率提供支撑。文中依托新疆油田首例页岩油开发三维项目,将VSP资料解释成果与地面地震处理数据及质控相结合,有效提高了地震资料成像质量,为页岩油开发中水平井轨迹的设计提供了数据基础。The Permian Lucaogou Formation of the Jimsar Sag in the Junggar Basin,holding an abundant shale oil reserve,is endowed with the resource base for effective productivity construction,and this area is mainly developed by horizontal wells.However,the old seismic data with low signal-to-noise ratio and resolution are exposed to various problems,such as low imaging accuracy for micro-relief structures,difficulty in effectively identifying minor faults and thin reservoirs,and failure to achieve a stable reservoir drilling rate.For the reasons,high-precision 3D seismic data acquisition,processing,and interpretation technologies are needed to solve the above problems and improve the reservoir drilling rate of horizontal wells.The vertical seismic profile(VSP)technology is a geophysical approach for oil and gas field development.Absorption and attenuation,velocity,frequency,and other parameters can be extracted from VSP data and then combined with surface seismic processing to improve the imaging accuracy of seismic data and ultimately provide support for accurately determining the structures and improving the resolution of sweet spot identification.Relying on the pilot 3D shale oil development project in Xinjiang Oilfield,this study combines VSP data-based interpretation results with surface seismic processing and quality control.In this way,the study effectively improves the imaging quality of seismic data and provides a data basis for horizontal well trajectory design in shale oil development.

关 键 词：VSP 高分辨率处理 页岩油 准噶尔盆地 

分 类 号：P631[天文地球—地质矿产勘探]