弱反射处理技术在渤海花状断层成像中的应用  

Application of weak reflection processing technology in Bohai Sea of flower shaped faults

作　　者：周秘 付晓敏 谢涛[1] 石孟常 徐强[1] ZHOU Mi;FU Xiaomin;XIE Tao;SHI Mengchang;XU Qiang(Research Institute of Geophysical Division,China Oilfield Services Limited,Tianjin 300451,China;Hebei Goa Storage Company of Huabei Oilfield Company,PetroChina,Langfang,Hebei 065500,China)

机构地区：[1]中海油田服务股份有限公司物探事业部研究院,天津300451 [2]中海石油华北油田公司河北储气公司,河北廊坊065000

出　　处：《石油地质与工程》2022年第3期8-12,共5页Petroleum Geology and Engineering

摘　　要：渤海古近系地层中存在弱反射地层,地层中的花状断层会加剧地震能量衰减,造成断层下伏地层成像困难,断层的绕射波偏移归位同样会影响花状断层成像效果。为此,应用偏移距域弱反射信号能量补偿技术和高斯射线束偏移技术进行攻关。结果表明,偏移距域弱反射信号补偿技术和高斯射线束叠前深度偏移技术对于古近系馆陶组花状断层成像有明显效果,成像精度得到改善,断层接触关系清楚,馆陶组地层反射结构清晰,为油气勘探提供了高质量的地震剖面。The Paleogene strata of the Bohai Sea is featured by weak reflection. The flower shaped faults in the strata will aggravate the attenuation of seismic energy and make it difficult to image the underlying strata. The diffraction wave migration and self-returning of the faults will also affect the imaging effect of the flower shaped faults. Therefore, the energy compensation technology of weak reflection signal in offset domain and Gaussian ray beam migration technology are used to solve the key problems. The results show that the offset domain weak reflection signal compensation technology and Gaussian ray beam pre-stack depth migration technology have obvious effects on solving the flower shaped fault imaging of Paleogene Guantao formation. In the end, the imaging accuracy has been improved, the fault contact relationship and the stratigraphic reflection structure of Guantao formation have been made clear, which provides a high-quality seismic profile for oil and gas exploration.

关 键 词：花状断层 弱反射 高斯射线束 速度建模 偏移距 

分 类 号：P631[天文地球—地质矿产勘探]