复杂山地山前带“两宽一高”井炮—可控震源联合地震采集技术应用实例

An Application Case of the “Two-Wide One-High” Seismic Acquisition Technology in Complex Front-zone of Mountain

针对塔里木盆地YZ区块复杂油气藏特征及勘探需求,新实施的三维地震采集项目采用了"两宽一高"地震采集技术,提出了突出小线距的高密度、宽方位三维观测系统优化设计方向,并应用了复杂地表区井炮—可控震源联合激发高效采集施工设计、巨厚山体区模型约束浅层层析三维表层调查与建模和数字化地震队高效施工辅助方法,确保了"两宽一高"地震采集技术在该区的成功实施。该技术大幅提高了地震采集效率,节约了地震勘探成本,地震资料品质也得到了明显改善,证明了"两宽一高"地震采集技术在复杂地表、复杂构造背景下岩性勘探中的有效性,为类似复杂区"两宽一高"地震采集技术的实施提供了借鉴。

Aiming at the characteristics and exploration demands of the complex reservoirs of Block YZ in Tarim Ba sin, ＂Two-wide One-high＂ seismic acquisition technique is adopted in the new 3D seismic acquisition project, this paper puts forward the optimization direction of high density wide azimuth 3D observation system emphasizing the small line distance. And the construction design for high-efficiency acquisition of the explosive - vibrator combined excitation technique in complex surface area, the modeling constrained shallow layer tomographic 3D surface investi gating and modeling technique in mountain area which weathered layer is thick, DSS high-efficiency acquisition asso- ciated technique are all put to use, those ensure the successful implementation of this ＂Two-wide One-high＂ 3D seis- mic acquisition project. All the application of the technical measures not only greatly improved the acquisition effi- ciency, saving the cost of exploration, but also made seismic data quality improved distinctly in the area. It is proved that the seismic acquisition technique of ＂Two-wide and One-high＂ is effective in lithologic exploration of complex structural background and complex surface area, which provides reference for the implementation of the ＂Two-wide and One-high＂ seismic acquisition technology in the similar complex area. K