LD地区致密气叠前关键技术及应用  

Application of tight gas prestack key techniques in LD area

作　　者：窦玉坛[1] 王大兴[2] 赵玉华[2] 王永刚[2] 

机构地区：[1]中国石油勘探开发研究院西北分院,兰州730020 [2]中国石油长庆油田分公司,西安710018

出　　处：《地球物理学进展》2014年第4期1644-1649,共6页Progress in Geophysics

基　　金：国家科技重大专项课题(2011ZX05001-003)资助

摘　　要：鄂尔多斯盆地LD地区为典型的黄土塬地貌,其砂体规模小、横向变化大、埋藏深、厚度薄、储层致密.以高保真地震分偏移距叠加资料为基础,在岩石物理分析的指导下,创新探索引入了几项关键叠前技术:球面波反射AVO分析技术研究山1段大偏移距道集AVO特征;叠前角度域中分析地震资料吸收规律,精度相对较高,能分辨5m储层;引入果蝇优化算法构建虚拟井,解决叠前同时反演过程中缺少横波测井问题.这几项黄土塬叠前关键技术为LD地区深层致密气勘探取得新进展发挥了重要作用.LD area of Erdos Basin is a typical loess Plateau landform with the small scale of sand body,drastic lateral variations,deep burial,thin thickness,tight reservoir.With high fidelity seismic different offset-stack data,under the guidance of rock physics analysis,We innovatively introduce several prestack key techniques.Spherical-wave AVO technique study the s1 long offset AVO features;Absorption of seismic data in prestack angle domain,a relatively high accuracy,can distinguish the 5 mreservoir;Introduction of fruit fly optimization algorithm of constructing virtual wells,can solve the problem of lacking of shear wave logging in the prestack simultaneous inversion.These prestack key techniques of loess Plateau in LD area have played an important role in the exploration new progress of deep tight gas.

关 键 词：致密气 叠前 AVO 球面波 角度域 虚拟井 

分 类 号：P631[天文地球—地质矿产勘探]