准南高密度三维近地表速度模型反演的地震道优选  

Optimization of Seismic Channel for High-density 3D Near-surface Model Inversion in Southern Junggar Basin

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作  者:刘宜文[1] 郑超 王克非[1] 马俊彦[1] 殷晓兰[1] 

机构地区:[1]中国石油新疆油田分公司勘探开发研究院地球物理研究所,新疆乌鲁木齐830013 [2]中国石油西南油气田公司川西北气矿,四川江油610000

出  处:《新疆地质》2016年第3期432-435,共4页Xinjiang Geology

摘  要:准南安集海背斜高密度三维具有炮道密度大、覆盖次数高、地震数据量大等特点,在进行层析法、折射法等初至波基准面静校正应用过程中带来了困难和挑战,主要表现在初至拾取量大,拾取效率和精度难以同时保证,模型反演运算时间长,达不到地震资料处理时效性要求。为此,针对初至波反演方法中数据量的约简、自动初至拾取精度量化统计方法进行了分析研究,从排列选择和高效初至拾取方法入手,通过大量试验及验证确定了安集海背斜高密度三维静校正方案,有效解决了高密度、大数据量静校正求解的难题,缩短了静校正的计算周期,为类似高密度三维区块的静校正计算提供了一种实用的工作思路和手段。The data of high-density 3D of Anjihai anticline in southern Junggar Basin is characterized by high density of shots, high folds, and large amount of seismic information etc.,which brings new challenges to the application of statics correction method(such as chromatography and refraction)depending on the first break as doing datum statics correction. The difficulty is large quantity of first-break picking,and failing to guarantee picking efficiency and accuracy simultane- ously, so it is hard to meet the requirements of seismic data processing timeliness.Therefore, for offset and the seismic rc- ceiving arrangement reduction of first-wave inversion method,by tomographic inversion experiment studying and quanti- tatively statistically analyzing the accuracy of automatically picking up first arrival,this paper offers a design how to se- lect the an'angement and the scope of picking up first break under guarantee precision to improve pick overall efficiency. The way of picking up with diversity, automatic and manual based on the statistical analysis provide a practical work ideas to similar high-density 3D first break pick up.

关 键 词:高密度 初至拾取 层析反演 静校正 优选 

分 类 号:P631.4[天文地球—地质矿产勘探]

 

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