利用全三维纵波资料进行裂缝检测

Fracture detection by using full 3-D P wave data.

裂缝性油气藏预测是当今世界石油界公认的难题。本文根据裂缝系统的自相似性 ,针对全三维纵波资料提出了多方位角二维分形技术检测裂缝方位和密度方法。其处理流程为 :①扩大面元处理 ,形成超级 5 12次CMP道集 ;②形成 9个方位道集 ;③分别进行NMO校正 ;④按方位进行振幅标定及AVO叠加 ;⑤按方位进行属性检测和分析。对实际资料的应用结果表明 ,此方法用于裂缝检测具有稳定性好和分辨率高的优点 。

Detection of fractured oil/gas reservoir is difficult problem generally recognized by current petroleum industry.According to self similarity of fractured system and using full 3 D P wave data,the data presented a new method for detection of fracture orientation and density by using multi azimuth 2 D fractal technique.Its processing flow is as follows: ① enlarging bin processing,forming super CMP gather having 512 fold;② forming 9 azimuth gathers; ③ NMO correction is carried out separately; ④ labeling amplitude and AVO stack according to azimuth; ⑤ detection and analysis of attributes according to azimuth.The applied results of the method to real data showed the method has advantages of good stability and high resolution when used for detection of fracture,having good applied prospect in the domain of oil/gas exploration and development.