南阳凹陷马店地区高精度三维地震技术与效果

针对马店地区断裂发育、构造破碎的特点,在高精度三维地震勘探过程中,运用基于正演模型的参数论证、采用小面元宽方位观测,通过精细表层结构调查、逐点设计井深与优选激发岩性等采集技术,改善了地震资料的单炮品质;在处理上采用静校正、叠前去噪、精细速度建模及叠前深度偏移技术提高复杂断裂带地震资料的成像精度;解释方面采用了三维可视化和相干数据体联合手段,通过精细成图,搞清了马店地区复杂断块圈闭,通过钻探发现了新的含油断块。

High precision 3Dseismic technology and effect analysis of Madian area,Nanyang sag

In view of the characteristics of the target intervals,such as deep buried depth,developed fractures and broken structure,in the process of high precision 3D seismic exploration,by using the parameters argumentation of the model based on the forward model,adopting the small bin and wide azimuth observation,through the lithology acquisition technology,such as the fine surface structure survey,well depth design point by point and optimum excitation lithology,the single shot quality of seismic data has been improved.As for processing,by using the technology of static correction,pre-stack noise elimination,precise velocity modeling and pre-stack depth migration,the imaging accuracy of seismic data in the complex fault zone has been enhanced.As for interpretation,with the combination of 3D visualization and coherent data volume,through the fine mapping,the complex faulted block traps in Madian area have been made clear and therefore,new oil-bearing faulted blocks have been discovered by drilling.