山前带地震采集技术研究——新疆和田桑株地区采集实例

Study of seismic acquisition in piedmont zone: A case study in Sangzhu of Hetian, Xinjiang Autonomous Region

1. Department of Marine Geology and Geophysics, Tongji University, Shanghai 210092, China;2. Geophysical Exploration and Development Company, SINOPEC Shengli Oilfield, Dongying 257100, China

随着勘探领域的不断拓宽, 山前带成为寻找油气新的场所。山前带的地表及地下条件复杂, 采集的资料品质低, 资料成像困难。针对这些难点, 在和田桑株地区, 设计了道间距和非固定炮间距的非常规观测系统, 用检波器组合和多次叠加联合压噪, 大炮检距和高覆盖次数进行采集, 解决了该区资料采集难关, 获得了品质较高的地震剖面, 形成了一套适合山前带的地震采集技术。

As seismic exploration applied to more and more regions, piedmont zones are becoming new areas in search for the presence of hydrocarbons. Because of the complex surface and subsurface conditions, the data acquired is low in S/N ratio, and difficult in imaging. In Sangzhu of Hetian region, a suite of methods was developed for data acquisition in piedmont zone. These methods include layout with variable group interval and shot interval, noise attenuation with array and stack, long offset, and high coverage. These methods have yielded seismic data of high quality.