CAJ | 학술논문

中国陆相沉积盆地的地质结构复杂,储层岩性的多变,需要有高精度的勘探方法.高密度空间采样是提高地震勘探精度的一项新技术.本文简要说明了点激发和点接收技术,分析高密度空间采样的野外工作方法,介绍了Gijs j.o.Vermeer提出的对称采样原理,从波场连续性的角度探讨了高密度空间采样技术.重点分析高密度空间采样数据的特点,即:高密集的初至波有利于近地表结构的调查,可提高静校正的精度;小偏移距、小点距接收增加了浅层的有效覆盖次数,提高浅层反射的成像精度;对规则噪声可实现无假频采样,室内的噪声分析和噪声压制的精度随着提高;高密度采集使波场连续性增强,使得各种数学变换的精度提高,有利于不同波场的分离.最后指出高密度空间采样地震勘探技术的难点在于室内数据处理,针对海量数据的分析和处理方法还需要进行深入细致的研究工作.
중국륙상침적분지적지질결구복잡,저층암성적다변,수요유고정도적감탐방법.고밀도공간채양시제고지진감탐정도적일항신기술.본문간요설명료점격발화점접수기술,분석고밀도공간채양적야외공작방법,개소료Gijs j.o.Vermeer제출적대칭채양원리,종파장련속성적각도탐토료고밀도공간채양기술.중점분석고밀도공간채양수거적특점,즉:고밀집적초지파유리우근지표결구적조사,가제고정교정적정도;소편이거、소점거접수증가료천층적유효복개차수,제고천층반사적성상정도;대규칙조성가실현무가빈채양,실내적조성분석화조성압제적정도수착제고;고밀도채집사파장련속성증강,사득각충수학변환적정도제고,유리우불동파장적분리.최후지출고밀도공간채양지진감탐기술적난점재우실내수거처리,침대해량수거적분석화처리방법환수요진행심입세치적연구공작.
China's continental deposition basins are characterized by complex geological structures and various reservoir lithologies. Therefore, high precision exploration methods are needed. High density spatial sampling is a new technology to increase the accuracy of seismic exploration. We briefly discuss point source and receiver technology, analyze the high density spatial sampling in situ method, introduce the symmetric sampling principles presented by Gijs J. O. Vermeer, and discuss high density spatial sampling technology from the point of view of wave field continuity. We emphasize the analysis of the high density spatial sampling characteristics, including the high density first break advantages for investigation of near surface structure, improving static correction precision, the use of dense receiver spacing at short offsets to increase the effective coverage at shallow depth,and the accuracy of reflection imaging. Coherent noise is not aliased and the noise analysis precision and suppression increases as a result. High density spatial sampling enhances wave field continuity and the accuracy of various mathematical transforms, which benefits wave field separation. Finally, we point out that the difficult part of high density spatial sampling technology is the data processing. More research needs to be done on the methods of analyzing and processing huge amounts of seismic data.