多分量地震勘探在渤海海域的应用

为解决气层地震成像模糊的问题，进行了我国首次海上三维多分量地震勘探。野外采集分64个线束进行滚动施工，每个线束采集2条平行于电缆方向的二维测线和19条垂直于电缆方向的三维测线，在现场处理得到的二维测线上，模糊带内转换波的成像很好。室内资料处理时先处理纵波资料，再在此基础上处理转换波资料。由于转换波与纵波勘探的原理不同，转换波资料的处理有一些特点：共转换点的概念、水平分量的极化、Inline分量和Crossline分量的旋转、动静校正、转换波的三维DMO。分析了造成转换波三维叠加后频率下降的原因，并对转换波资料的解释做了初步探索。

Application of multiple component seismic exploration in Penglai 19-3 Oilfield, Bohai Bay

To improve the image of gas cloud, the first marine 3D multiple component seismic survey was shot in Bohai Bay. The 3D seismic field work was divided into 64 patches. Two 2D lines parallel to the cable and 19 3D lines perpendicular to the cable were collected within each patch. The indoors seismic processing is divided into two steps: P-wave data is processed to get accurate P-wave velocity and then converted wave data is processed. The principle of converted wave exploration is different from P wave exploration for the converted wave processing is characterized by CCP binning, polarization of horizontal component, rotation of inline and crossline component, static correction, and DMO correction.