句容地区VSP转换波的研究

VSP converted wave research in Jurong area

胜利石油管理局物探公司,东营257100

Geophysical Exploration and Development Company, Shengli Petroleum Administration, Dongying 257100

以句容地区shk1井VSP测井资料为基础数据,对VSP转换波进行了细致的分析,提出了处理特殊VSP转换波的方法,获得了零偏移距、非零偏移距VSP转换波最终深度剖面和时间剖面。因为VSP转换波的产生和接收均在地面以下的井中,避开了地面各种干扰波的干扰,又避免了地面浅层的强烈吸收,故VSP转换波跟VSP纵波或常规地面转换波相比,具有较高的分辨率和信噪比。

This paper presents a method to process VSP converted wave based on the VSP logging data of shk1 well in Jurong area. The final depth profile and time profile which is zero offset distance and non zero offset distance are obtained. The VSP converted wave are produced and received in well under ground. which avoids the varied disturbing wave in the surface and the absorption of the ground shallow layer for the converted wave. so the resolution factor and S/N ratio of the VSP converted wave are better compared with the VSP compressional wave and the conventional surface converted wave.