大面元三维地震勘探技术在准噶尔盆地的应用

APPLICATON OF LARGE-AREAL-EL-EMENT 3D SEISMIC TECHNIQUE IN JUNGGAR BASIN

根据准噶尔工地油气勘探目的层较深、构造平缓、地表条件复杂和地震反射资料信嗓比低等特点，将三维地震勘探共中心点面元扩大到５０ｍ×１００ｍ。面元扩大，不仅避开了施工障碍、保证了原始资料的质量、为提高覆盖次数改善数据质量创造了条件，而且还减少了采集处理工作量，降低了成本、缩短了周期，使大面元三维地震勘探成果及时指导油藏评价和开发井冈的部署，减少了大量钻井费用。

Because of deeper target zones,flat structures,complex surface conditions.and lower SNR of seismic data in Junggar basin,common-center-point areal element of 3D seismic event can be increased to 50 m×100 m.In this case,it avoids the barrier to the job,ensures the quality of field data and helps to increase coverage and improves data quality.On the other hand,it reduces the data gathering and processing loads,lowers the cost,shortens the circle,and reducese the drilling cost by use of large-areal-element 3D data to direct the reservoir evaluation and the design of exploitation well patterns.