时频电磁技术在黄土塬覆盖区河道砂油藏分布预测中的应用  

Application of time⁃frequency electromagnetic(TFEM)technology in prediction of channel sand reservoir distribution in Loess Plateau area

作　　者：于波[1] 王学刚[1] 李明瑞[1] 张亚东[1] 丁富峰 YU Bo;WANG Xuegang;LI Mingrui;ZHANG Yadong;DING Fufeng(PetroChina Changqing Oilfield Company.,Xi’an,Shaanxi 710021,China)

机构地区：[1]中国石油长庆油田公司,陕西西安710021

出　　处：《石油地球物理勘探》2024年第3期620-628,共9页Oil Geophysical Prospecting

摘　　要：鄂尔多斯盆地西部黄土塬覆盖区的中生界侏罗系油藏成藏主控因素复杂,在未开展三维地震勘探的区域,仅利用二维地震资料进行钻探的成功率较低。为了提高钻井成功率,针对该区侏罗系河道砂油藏特点,采用时频电磁双侧、双源激发、多线接收的油气检测技术方案。在鄂尔多斯盆地西部ZB地区进行攻关试验,总结了适用于黄土塬覆盖区的时频电磁采集、处理、解释技术方案,即两项针对性采集方案设计和三项针对性处理、解释技术。利用GeoEast软件系统,基于深度学习开展时频电磁多参数智能油气预测。根据时频电磁解释成果,在时频电磁强异常区域部署并完钻Z6井,获得工业油气流,表明时频电磁预测结果与实钻结果吻合,证实了在黄土塬覆盖区利用时频电磁技术对侏罗系薄储层进行油气预测的可靠性。The main controlling factors are complex for the reservoir formation in the Mesozoic Jurassic of the Loess Plateau area in the western Ordos Basin.In the areas without three-dimensional seismic data,success rates in drilling only based on two-dimensional seismic data are low.To improve the success rate in drilling,this paper focuses on the Jurassic channel sand reservoir feature and adopts a time-frequency electromagnetic(TFEM)dual-side and dual-source excitation and multi-line receiving oil and gas detection technology scheme.Through experiments in the ZB area of the western Ordos Basin,a TFEM acquisition,processing,and interpre-tation technology scheme suitable for the the Loess Plateau area is developed:two targeted acquisition scheme designs and three targeted processing and interpretation techniques.The GeoEast system is used for intelligent oil and gas prediction of TFEM multi-parameters based on deep learning.According to the results of TFEM in-terpretation,well Z6 is deployed and drilled in the abnormal area of TFEM strength,and industrial oil flow is obtained,which verifies that the TFEM prediction results are consistent with the real drilling results and con-firms the reliability of TFEM oil and gas prediction for Jurassic thin reservoir in the Loess Plateau area.

关 键 词：时频电磁法 黄土塬 薄储层 油气预测 多参数 极化率 

分 类 号：P631[天文地球—地质矿产勘探]