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本文介绍苏北地区富44井非零井源距VSP资料的处理方法。主要处理过程包括:水平分量x,y的合成(H);垂直分量Z及水平分量H的纵、横波分离(Z_p,Z_s,H_p,H_s);纵波Z_p、H_p中的上、下行波分离;建立速度模型,并由上行的Z_(pu)与H_(pu)合成上行波 MOD,由下行的Z_(pd)与H_(pd)合成下行波TRY;利用下行波TRY提取反褶积算子对上行波MOD及其本身作反褶积;上行波VSP校正,上行波VSP—CDP变换(归位)及叠加,最终获得一小段二维井旁地震剖面。通过对VSP处理成果及各种资料进行综合对比分析,表明该处理方法对复杂地区的VSP资料的处理是正确而有效的。
This article introduces the treatment methods of non-zero well spacing VSP data from Fu 44 well in North Jiangsu. The main processing includes: synthesis of horizontal components x, y (H); vertical and transverse separation (Z_p, Z_s, H_p, H_s) of vertical component Z and horizontal component H; separation of up and down waves in the longitudinal waves Z_p, H_p; The velocity model is established and the upgoing wave MOD is synthesized from the upstream Z pu and H pu, and the down wave TRY is synthesized from the downstream Z pd and H pd. The deconvolution operator pair is extracted by using the down wave TRY Upstream wave MOD and its own for deconvolution; upstream VSP correction, upstream VSP-CDP transform (homing) and stacking, and finally get a short two-dimensional borehole seismic section. Through comprehensive comparison and analysis of VSP processing results and various data, it shows that the processing method is correct and effective for the processing of VSP data in complicated areas.