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井间地震反射波成像比井间速度层析成像具有更高的分辨率,井间地震反射波成像剖面能用于井间储层精细解释。本文采用非均匀介质的射线追踪算法,按照实际井间地震观测系统计算共炮点道集(或共接收点道集)的反射波时间场,然后将反射波能量在共反射点上叠加,得到井间地震反射波成像剖面。其具体做法分三步:1计算各反射点的反射波旅行时,包括上、下行反射波;2按一定的观测方式(如共炮点、共接收点、共偏移距、共中心点、共深度点)进行上、下行波分离;3分别对上、下行反射波进行共反射点叠加成像并合并。通过理论模型和实际资料处理,均得到了质量较高的井间反射波成像剖面
Crosswell seismic reflection imaging has higher resolution than crosswell velocity tomography, and crosswell seismic reflection imaging profiles can be used to finely interpret crosswell reservoirs. In this paper, we use the ray tracing algorithm of inhomogeneous medium to calculate the reflection time-field of common shot gathers (or common receiving gathers) according to the actual cross-well seismic observation system, and then superimpose the reflected wave energy on the total reflection point to get Crosswell seismic reflection imaging section. The specific method is divided into three steps: 1 Calculate the reflections of reflection points Traveling, including the uplink and downlink reflected waves; 2 according to a certain observation methods (such as a total shot, a total of received points, offset, A total of depth points) on the downlink wave separation; 3, respectively, on the downlink reflection wave total reflection point overlay imaging and merge. Through the theoretical model and actual data processing, high quality cross-well reflection imaging profile