南堡凹陷高柳地区二次三维地震采集技术

南堡凹陷高柳地区原有地震资料品质较低，已不能满足该区油气资源挖潜需要，为此在该区进行了二次三维地震勘探。针对该区地表条件复杂及地下层倾角大，断层发育、断块小且多的特点，制定了合理的施工方案，采用恢复炮点变观、炮点横向移动变观和块状特观设计等先进的地面设计施工技术，并对地震采集方法及行项参数进行了全面优化。实践表明二次三维地震剖面不仅拥有较高的信噪比，同时具有较高的分辨率，浅层资料可充分满足精细构造解释和高分辨率储集层反演需要，中、深层资料能够准确落实构造形态，进行层序地层学研究。以二次三维地震资料为基础，通过开展综合地质研究，经过少量探井、评价井的实施，新增含油面积85.5km^2，三级石油地质储量25,601万t,图4表1参9。

Acquisition technologies for second round of 3D seismic survey in Gaoliu, Nanpu Sag

The quality of old seismic data in Gaolin arca was very low and could not meet the technical needs of petroleum production.A second round of 3D sismic survey was carefully conducted,New acquisition solutions were designed to solve the problems of complex surface conditions,high dips of formations,highly faulted formations and small sizes of blocks,Advanced surface cquisition technologies,such as the shot-point restorable varying layout system.the shot point laterel movernet varying layout system and the block special layour system were applied.Seismic acquisition methods and the corresponding patamcters were carefully optimized.The processed results of this acquired seismic data are fearured with high signal to noise ratios and relatively high resolution.Shallow data are qualified for precise structural interpretation and high resolution of reservoir prediction.Medium and deep data are suitable to structural interprctation and sequence stratigraphic studies,With this seisrnic data,related comprchensive geological studies,and a few exploration and evaluated wells,new oil-hearing areas of 85.5km^2 and 256.01 million tons of oil geologic reserves were discovered.