井控地震资料处理技术及其在LS地区的应用

Well-control seismic data processing and its application in LS area

(1．成都理工大学，四川成都610059；2．中国石油化工股份有限公司勘探开发研究院南京石油物探研究所，江苏南京210014)

Chengdu University of Technology, Chengdu 610059, China

在塔里木盆地LS地区，泥盆系和志留系的地层圈闭和岩性圈闭是重要的勘探目标。然而，受地震资料分辨率的限制，这类圈闭的落实程度较低。为此，在LS地区开展了提高分辨率VSP井控地震资料处理技术研究。通过分析VSP资料，求取球面扩散振幅补偿因子；对VSP走廊叠加剖面与地震资料进行匹配分析，优选反褶积参数；通过分析零偏VSP资料，计算时变Q因子；对地震资料进行时空变Q分析，并由VSP资料进行校正，得到时变Q补偿因子。通过井控地震资料处理技术处理后的资料，分辨率有了较大提高，对砂岩尖灭点和志留系内幕的描述更加准确。

The strata and lithological traps of Devonian and Silurian are the exploration targets in LS area, Tarim Basin．However, the traps were poorly located due to the resolution limitation of seismic data．Therefore, VSP well control seismic data processing was investigated and applied for improving resolution in LS area．By using VSP data，spherical spreading amplitude compensation factor was estimated．Matching analysis was carried out on the VSP corridor stack profiles and the seismic data to obtain optimum processing parameters for deconvolution. Time variant Q was calculated by analyzing zero-offset VSP data. Moreover, spatial-time variant Q analysis was applied in seismic data and the VSP data was used to correct it to get time variant Q compensation factor. The resolution of data after processed by well driven technology has been greatly improved and the sandstone pinch-out points and Silurian internal episode were described more accurately.