曲流河道井震联合识别技术及应用——以大庆长垣西部斜坡区为例  

Logging-seismic data combined identification technology for meandering river and its application:a case study of the western slope area of Daqing Placanticline

作　　者：杨春生 杨会东[2] 杨莹彬[2] 陈宝玉 张秀丽[2] YANG Chunsheng;YANG Huidong;YANG Yingbin;CHEN Baoyu;ZHANG Xiuli(School of Earth Sciences,Northeast Petroleum University,Daqing,Heilongjiang163318,China;Exploration and Development Institute,Daqing Oilfield of CNPC,Daqing,Heilongjiang163712,China;Daqing Oilfield of CNPC,Daqing,Heilongjiang163712,China)

机构地区：[1]东北石油大学地球科学学院,黑龙江大庆163318 [2]大庆油田勘探开发研究院,黑龙江大庆163712 [3]大庆油田有限责任公司,黑龙江大庆163712

出　　处：《石油地球物理勘探》2023年第3期700-712,共13页Oil Geophysical Prospecting

基　　金：国家科技重大专项“大庆长垣特高含水油田提高采收率示范工程”(2016ZX05054)资助。

摘　　要：以大庆长垣西部斜坡区萨尔图油层萨Ⅰ组为例,利用高密度三维地震资料横向信息丰富、测井资料纵向分辨率高的优势,采用井震结合的方法,以海拉尔曲流河现代沉积的4种典型模式为指导,在地震剖面上分析点坝和废弃河道的响应特征,建立了点坝和废弃河道的地震响应模式;由于常规分频解释技术受限于短时窗,为此,在地震数据分频计算中引入小波分频变换算法,将地震数据由时间域数据体转换为频率域数据体,应用“基于小波分频变换的RGB属性融合技术”识别点坝边界、内部废弃河道及物性变差带,精准预测了点坝和废弃河道的展布特征;首次利用地震储层预测成果建立了古河道内部单一侧积体长度、宽度与河流满岸宽度之间的关系,相关系数达0.9以上,为西部斜坡区稠油开发提供了精准的地质依据。结果表明:研究区废弃河道在平面上呈“S”形,平面上精细识别出与现代曲流河沉积对应的4种典型模式,完成了萨Ⅰ1废弃河道精细识别和平面组合;应用废弃河道和点坝识别成果指导井位部署197口,其中99口直井成功率为100%,98口水平井平均钻遇水平段426 m,水平段含油砂岩钻遇率为92.6%,利用地震资料解释成果规模部署近百口开发水平井。The Sa I Formation of the Sartu oil layer in the western slope area of Daqing Placanticline is taken as an example for research in this paper.As high-density three-dimensional(3D)seismic data has rich horizontal information,and logging data has a high vertical resolution,the two are combined for application.Guided by the four typical patterns of the modern deposition of the meandering Hailar River,the combination method of logging and seismic data is used to analyze the response characteristics of the point bars and the abandoned river channels of the meandering river on the seismic profiles and build the corresponding seismic response models.Since the conventional frequency-division interpretation technology is limited to the frequency-division interpretation with a short time window,the frequency-division wavelet transform algorithm is introduced into the frequency-division calculation of seismic data to convert the seismic data from the time-domain data volume to the frequency-domain data volume.The"RGB attribute fusion technology based on the frequency-division wavelet transform"is applied to identify the point bar boundary,internal abandoned river channels,and the variation zone of the meandering river,and the distribution characteristics of the point bars and the abandoned river channels are accurately predicted.Moreover,the relationship between the length and width of a single lateral deposit in the ancient channels and the full bank width of the river is established for the first time by the seismic reservoir prediction results.The correlation coefficient is more than 0.9,which provides an accurate geological basis for heavy oil development in the western slope area.The results show that the abandoned river channels in the study area are in an“S”shape on the plane,and four typical patterns corresponding to the modern meandering river deposition are precisely identified on the plane.In this way,the fine identification and plane combination of the abandoned river channels in SaⅠ1are completed.The reco

关 键 词：曲流河 迁移、叠加平面模式 地震响应特征 小波分频变换 RGB属性融合 大庆长垣西部斜坡区 

分 类 号：P631[天文地球—地质矿产勘探]