深层火山岩目标处理技术在徐家围子地区的应用

APPLICATION OF TARGET PROCESSING TECHNIQUE OF DEEP-LAYER VOLCANIC ROCK IN XUJIAWEIZI REGION

深层火山岩的目标处理效果直接影响深层火山岩天然气勘探的效果。针对徐家围子地区深层火山岩复杂地质条件下的地震资料特点，分别对建立在准确的静校正模型基础上的精确静校正技术、地震资料去噪技术等进行了系统研究和应用。在充分发挥各项处理技术优势的基础上，形成了一套针对深层火山岩地质目标的地震资料处理技术流程。实践证明，反Q补偿技术可用于深层高频能量补偿；高阶动校正技术能够有效地解决大炮检距地震资料动校正处理畸变的难题；叠前时间偏移技术使绕射波、断面波归位更加准确，有效提高了识别小断块的能力。徐家围子地区深层火山岩资料的目标处理成果提高了深层地震资料的成像精度及分辨率。

For deep-layer volcanic rocks, the target processing effects directly influence the results of natural gas exploration. In view of the seismic data＇characteristics of the rocks under complicated conditions in Xujiaweizi region, the systematic studies and application are conducted for the following techniques established on the basis of accurate static correlating model： such as accurate static correlation technique, noise eliminating technique of seis- mic data and so forth. Based on the fully used potentials of each processing technique, a set of seismic data pro- cessing workflow is generated for the geological target of deep-layer volcanic rocks. The practice proves that inverse Q compensating technique can be used in high-frequency energy compensation; high-order dynamic correlation technique can effectively solve the distortion problem of seismic data＇ dynamic correlation process for the large off- set; time migration technique can make diffraction and fault plane waves more accurate and thus greatly enhance the ability of identifying small faulted blocks. The achievements of target process have increased the imaging preci- sion and resolution of deep-layer seismic data in Xujiaweizi volcanic rocks.