拖缆前后源双向同时激发采集新技术探索

发布时间：2018-08-27 17:33

【摘要】：常规拖缆采集时其单边激发、单边接收的作业模式会导致采集方位角单一。在潜山或高陡倾角构造区采用此方式采集地震数据时,会造成一侧照明不足、成像模糊。在分析常规拖缆采集作业局限性的基础上,提出了拖缆前后源双向同时激发采集技术,该技术可有效提升高陡倾角构造两侧的照明度。对比不同的实现方式,优选辅助震源船追随尾标航行激发的作业模式,首次在国内实现了拖缆前后源双向同时激发采集。渤海油田JZ区块实际应用结果表明,与常规拖缆采集相比,该方法有效提高了潜山面的成像效果,提升了高陡倾角构造区拖缆作业潜力;其技术流程可行,作业模式合理,对挖掘拖缆作业潜力有一定的借鉴意义。
[Abstract]:The single side excitation of conventional towing cable and the operation mode of unilateral receiving will lead to a single acquisition azimuth. When seismic data are collected by this method in buried hill or high steep dip area, the illumination of one side will be insufficient and the imaging will be blurred. Based on the analysis of the limitation of conventional towing cable acquisition, a bidirectional simultaneous excitation acquisition technique is proposed, which can effectively enhance the illumination on both sides of the high steep dip structure. Compared with the different implementation modes, the operation mode of auxiliary source ship to follow the tail mark navigation excitation is selected, and for the first time, the towing cable forward and back sources are simultaneously excited in both directions in our country. The practical application results of JZ block in Bohai Oilfield show that compared with conventional towing cable acquisition, this method can effectively improve the imaging effect of buried hill surface and enhance the potential of towing cable operation in high steep dip structural area, and its technical flow is feasible and its operation mode is reasonable. It can be used for reference to excavate the potential of towing cable operation.
【作者单位】：中海石油(中国)有限公司天津分公司;
【分类号】：P631.4

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