OVT处理技术在复兴地区大连片地震资料中的应用

Application of OVT processing technology in seismic data of Dalian area in Fuxing area

针对复兴地区精细油气勘探的需求,基于“两宽一高”地震采集资料的特点,开展了宽方位矢量偏移距(OVT)域处理。采用贴合法和三角形互换合理划分OVT片,最小化中心化偏移距范围,填补面元空洞问题;采用椭圆拟合方位各向异性校正技术提高蜗牛道集(OVG)道集相同性,改善OVT域偏移剖面的成像精度,最终的处理成果资料反射波组齐全,信噪比和分辨率较高,尤其是侏罗系目的层反射特征清楚,凉高山组薄砂体反射特特征明显,振幅切片上的河道边界刻画清楚。该处理技术的应用,为复兴地区精细解释工作提供良好的资料基础,证实了OVT处理技术的有效性。

According to the demand of fine oil and gas exploration in Fuxing area,based on the characteristics of“two width and one height”seismic acquisition data,OVT domain processing was carried out.The OVT slice is reasonably divided by using the paste method and triangle exchange to minimize the range of center offset and fill the bin hole problem;The ellipse fitting azimuth anisotropy correction technology is used to improve the homogeneity of OVG gathers and improve the imaging accuracy of OVT domain migration sections.The final processing result data has complete reflection wave sets,high signal to noise ratio and resolution,especially the Jurassic target layer has clear reflection characteristics,the Lianggaoshan Formation thin sand body has obvious reflection characteristics,and the channel boundary on the amplitude section is clearly delineated.The application of this processing technology provides a good data base for the fine interpretation work in Fuxing area,and confirms the effectiveness of OVT processing technology.