东海西湖凹陷三维地震连片处理

Merging of 3D Seismic Data from Chunxiao Gas Field, Xihu Sag, East China Sea

陈茂根 范毅华 杨新菊 王影

CHEN Mao-gen FAN Yi-hua YANG Xin-ju WANG Ying

中国石油化工股份有限公司 上海海洋油气分公司 研究院, 上海 200120

Institute of Shanghai Offshore Petroleum Branch, SINOPEC, Shanghai 200120, China

西湖凹陷三维地震连片处理中不同时期采集的三块地震数据在偏移距、覆盖次数、面元大小及方位角等方面存在较大差异。为了得到统一的面元大小和网格方向,常规三维连片处理的思路是折衷地选取统一的网格方向和面元大小,然后按照此网格参数进行全区的面元均化处理。当拼接区块的方位角和面元大小与定义的统一网格参数差异较大时,这种处理导致面元空洞、覆盖不均现象更严重。文章叙述西湖凹陷连片处理实例中为了更好地保持各区块自身特性,而采用的与常规思路不同的三维连片解决方案。

Three blocks of data from Xihu sag were acquired with a wide variety of spread length, bin dimension, grid orientation, fold, etc.Conventional solution for different bin dimensions and grid orientations is to flex-bin traces of all surveys using a defined single grid parameter.It may result in much more holes and more un-uniform fold within a bin for surveys whose line orientations and bin dimensions are quite different from those of the defined.The paper describes an integrated set of processes, which have been applied in 3D merging to retain the best features of all surveys without compromise.

https://doi.org/10.3969/j.issn.1008-2336.2003.z1.010