一种基于时不变褶积的深度域合成地震记录制作方法  

A creation method of synthetic seismic record in depth domain based on time invariant convolution

作　　者：陈可洋[1] 赵宝山 李永臣 

机构地区：[1]中国石油大庆油田有限责任公司勘探开发研究院,黑龙江大庆163712 [2]中石油煤层气有限责任公司忻州分公司,山西太原030000

出　　处：《中国海上油气》2016年第4期35-41,共7页China Offshore Oil and Gas

基　　金：国家重点基础研究发展计划(973计划)项目"火山岩油气藏的形成机制与分布规律(编号:2009CB219307)";中国石油天然气股份有限公司科技计划项目"井中VSP地震处理配套技术研究及在松辽岩性油藏评价中的应用(编号:KT2015-12-08)"部分研究成果

摘　　要：目前地震资料合成记录的制作和标定工作主要是在时间域进行,而随着深度域地震成像技术的工业化推广应用,深度域合成地震记录的制作与标定就显得尤为重要。为此提出了一种基于时不变褶积的深度域合成地震记录制作方法,并给出了具体的计算步骤,即基于线性时不变假设,先将深度域数据转换到伪深度域,与伪深度域地震子波进行褶积,然后再转换到深度域,解决深度域非线性时变褶积问题。采用层状介质模型和逆时偏移模型验证了本文方法的准确有效性,并成功应用于标定实际深度域地震成像数据,结果表明本文方法计算过程简单、易实现,制作的深度域合成地震记录准确可靠,可以为深度域地震资料处理和解释提供重要的方法指导。The seismic data synthetic record creation and calibration tasks are presently carried out in time domain, while depth domain synthetic seismic record creation and calibration tasks become very important with the industrial application of the depth domain seismic imaging technology. A method of depth domain synthetic seismic record creation based on time invariant convolution and its computational steps are presented in detail. Firstly, the depth domain data is converted to pseudo depth domain based on the linear time invariant assumption, in which the convolution with seismic wavelet is performed and it is converted back to the depth domain to solve the problem of time-varying nonlinear convolution. The proposed method is validated with layered model and reverse-time migration theoretical model and is successfully applied to practical depth domain seismic data calibration. Results show that the method is effective and easy to be implemented, and the depth domain synthetic seismic record created is reliable, which implies the method can provide important method guidance for the seismic data processing and interpretation in depth domain.

关 键 词：深度域合成地震记录 制作方法 计算步骤 模型试验 实际应用 

分 类 号：TE132[石油与天然气工程—油气勘探]