基于数据驱动的合成地震记录技术及其应用研究

Data-driven synthetic seismogram technique and its application

(1.中国石油化工股份有限公司石油勘探开发研究院项目评价所,北京100083；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）CNPC物探重点实验室,北京102249)

Ji Min, Exploration & Production Research Institute,SINOPEC,Beijing 100083,China

测井资料与地震资料之间的匹配是地震精细解释和地震反演的基础工作,计算合成地震记录的技术是井震标定的关键技术。分析并建立了基于数据驱动的合成地震记录的技术流程。针对测井资料校正、深时转换子波估算与反射系数求取和地震子波估算3个核心环节,提出了从测井数据去除直流分量、采用非等间距插值和频率域加窗确定性子波求取的可行、有效的计算方法。整个合成地震记录计算过程完全根据测井资料与地震数据自动进行,减少了常规井震标定工作中“拉伸”和“压缩”等人为操作。实际资料的应用结果表明该方法有效,其技术流程可行。

Matching of well-logging data and seismic data is the basic work for seismic fine interpretation and seismic inversion.Furthermore,the key technique in the matching process is the synthetic seismogram method.Aiming at the three core steps,including well-logging data calibration,time-depth conversion and reflectivity computation as well as seismic wavelet estimation,we proposed a method for removing direct-current component from well-logging data,non-equidistant interpolation and deterministic wavelet estimation in frequency domain,and established data-driven synthetic seismogram technique workflow.The whole computation process of synthetic seismogram is completed automatically according to the well-logging and seismic data characteristics.Meanwhile,the processing achieves automatic well-to-seismic tie without manual interference such stretching and squeezing etc.The actual application results show that the computation methods are effective and the processing technique workflow is feasible.

10.3969/j.issn.1000-1441.2011.04.010