摘要
纵波（vp）通过岩石基质和孔隙流体传播，而横波（vs）只通过岩石基质传播。当地层含气或油时，vp发生变化，vs变化不大。利用vp、vs资料联合解释，可提高可靠性。当前野外地震勘探主要是纵波勘探，如何从常规剖面中提取横波，是当今研究的热点。本文介绍了利用Kirchhoff积分偏移直接从常规地震剖面中提取转换横波，用于烃类检测，并在准噶尔盆地腹部王西沙漠地区获得了成功，为今后的岩性勘探、储层预测、直接找油找气提供了一种新手段。
P-wave propagates through rock matrix and pore fluid while S-wave can only propagatethrough rock matrix. When the strata contain gas or oil,P-wave velocity will change but S-wavevelocity will hardly change. The combmed interpretation using both P-wave and S-wave data canimprove reliability. How to pick up the S-wave from the conventional sections is a hotspot of current research. In the paper. the Kirchhoff integral migration is used to extract the converted S-wave directly from the conventional seismic sections for the hydrocarbon detection. Its applicationin the Shixi desert area of the central Zhunger basin is successful. It provides a new way for theIithology exploration,reservoir prediction and hydrocarbon direct searching.
出处
《石油物探》
EI
CSCD
北大核心
1997年第2期1-6,共6页
Geophysical Prospecting For Petroleum
关键词
横波转换
油气检测
地震勘探
S-Wave Conversion, Kirchhoff Integral, Hydrocarbon Detection, P-Wave Section, S-Wave Section, Rock Matrix, Pore Fluid
