CAJ | 학술논문

野外空间采样密度的提高将增加室内数据分析的工作量,常规的基于地震数据的点与线分析方法有一定的局限性.本文简要说明空间子集的抽取方法,列举了正交子集和斜交子集的特点,并通过三维可视化展示了子集数据的空间特性.提出在数据处理中利用子集的时间切片:(1)分析地震道空间分布的均匀性和规则性;(2)研究面波及规则干扰的空间分布特点;(3)检测叠前数据中的异常信息:(4)监控叠前去噪的效果.实际数据的应用结果表明基于空间子集的分析方法是一种独特有效的地震数据分析方法,从另一种视角观察地震数据,可以发现其中某些新的特征,以提高处理人员对数据的洞察能力.
야외공간채양밀도적제고장증가실내수거분석적공작량,상규적기우지진수거적점여선분석방법유일정적국한성.본문간요설명공간자집적추취방법,열거료정교자집화사교자집적특점,병통과삼유가시화전시료자집수거적공간특성.제출재수거처리중이용자집적시간절편:(1)분석지진도공간분포적균균성화규칙성;(2)연구면파급규칙간우적공간분포특점;(3)검측첩전수거중적이상신식:(4)감공첩전거조적효과.실제수거적응용결과표명기우공간자집적분석방법시일충독특유효적지진수거분석방법,종령일충시각관찰지진수거,가이발현기중모사신적특정,이제고처리인원대수거적동찰능력.
There are some limitations when we apply conventional methods to analyze the massive amounts of seismic data acquired with high-density spatial sampling since processors usually obtain the properties of raw data from common shot gathers or other datasets located at certain points or along lines. We propose a novel method in this paper to observe seismic data on time slices from spatial subsets. The composition of a spatial subset and the unique character of orthogonal or oblique subsets are described and pre-stack subsets are shown by 3D visualization. In seismic data processing, spatial subsets can be used for the following aspects: (1) to check the trace distribution uniformity and regularity; (2) to observe the main features of ground-roll and linear noise; (3) to find abnormal traces from slices of datasets; and (4) to QC the results of pre-stack noise attenuation. The field data application shows that seismic data analysis in spatial subsets is an effective method that may lead to a better discrimination among various wavefields and help us obtain more information.