陈志德,刘振宽,李成斌
CHEN Zhi de\+1; LIU Zhen kuan\+2; LI Cheng bin\+2 (1. Chinese Geology University;

• 1:中国地质大学!北京100083
• 2:大庆油田有限责任公司勘探开发研究院!黑龙江大庆163712
• 3:大庆油田有限责任公司勘探开发研究院!黑龙江大庆163712

摘要(Abstract)：

针对三维叠前克希霍夫深度偏移过程中成像精度和偏移计算效率两项技术指标 ,开展了实用技术研究。一是为提高成像精度而开发的 3种反假频算法、 3种走时插值方法、 2种偏移孔径计算方法及振幅保真处理 ;二是为提高计算效率进行的并行处理机制研究 ,包括叠前数据分割、成像体分块、数据空间重排、内存控制、输入 输出效率的优化及利用偏移算子的局部性解决跨节点负载平衡问题。采用国际通用的Marmousi模型、SEG EAGE模型进行测试 ,成像深度误差小于 5% ,并行计算效率高达 80 % ,应用于霍多莫尔 118km2 的三维地震资料处理后 ,取得满意结果。
This paper studies the imaging accuracy and migration calculation efficiency in the process of 3D pre stack kirchhoff depth migration. It develops 3 anti false frequency algorithms, 3 travel time interpolation methods, 2 migration pore diameter calculation method and amplitude fidelity processing. Then it studies the parallel processing strategy in order to increase calculation efficiency, including pre stack data cut, imaging body blocking, data space rearrangement, internal memory controlling, input/output efficiency optimization and using the locality of migrated operator to solve the problem of cross node load equillibrium. It uses the international used Marmousi Model, SEG/EAGE Model to perform the test. The imaging depth error is lower than 5% and the parallel calculation efficiency reaches to 80%.

关键词(KeyWords)： 克希霍夫深度偏移;假频;走时;并行计算;优化分割
kirchhoff depth migration; false frequency; travel time; parallel calculation; optimized cut

Abstract:

Keywords:

基金项目(Foundation):

作者(Authors): 陈志德,刘振宽,李成斌
CHEN Zhi de\+1; LIU Zhen kuan\+2; LI Cheng bin\+2 (1. Chinese Geology University;

参考文献(References)：

• [1 ]马在田 地震成像技术 [M] 北京 :石油工业出版社 ,1 989
• [2 ]ScheniderAW Integralformulationformigrationintwoandthreedimension[J] Geophysics,1 978,43 (1 )