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随着勘探目标日益复杂,常规的窄方位角地震采集技术已经难以满足当前勘探需求.宽方位角采集技术含有丰富的方位角信息,有利于对深层、高陡构造、各向异性岩体进行成像.国外宽方位角勘探多集中在以墨西哥湾岩下油藏为代表的地区,而国内宽方位角勘探研究多集中在陆上.本文以镇巴区块为例,针对地震资料信噪比低和高陡复杂构造成像难的问题,进行宽方位角三维观测系统设计及采集攻关,在增强激发接收效果、压噪能力、提高静校正精度、改善陡倾角地层成像效果等方面采取了针对性技术措施.这些技术措施的应用不仅大幅度改善了地震剖面的成像质量,而且具有普遍的推广意义.
With the increasingly complex exploration targets, the conventional narrow azimuth seismic acquisition technology has been difficult to meet the current exploration needs.Wide azimuth acquisition technology is rich in azimuth information, which facilitates the imaging of deep, high steep structures and anisotropic rock mass .Wide wide azimuth exploration is mainly concentrated in the area represented by the Gulf of Mexico reservoir, while the wide azimuth exploration in China is mostly concentrated in the land.In this paper, taking the Zhenba block as an example, High-steep and complex structure imaging difficult problem, the wide azimuth angle of the three-dimensional observation system design and acquisition research, to enhance the excitation receiving effect, noise and noise ability, improve the accuracy of static correction, improve the steep dip formation imaging effects and other aspects of the targeted technical measures The application of these technical measures not only greatly improves the imaging quality of the seismic profile, but also has a general promotion meaning.