井间地震高斯束叠前深度偏移成像方法  

The study of cross-well seismic Gaussian beam pre-stack migration imaging in depth domain

作　　者：俞岱[1] 杨飞龙 孙渊[1] 边瑞峰 王颖[1] YU Dai;YANG Feilong;SUN Yuan;BIAN Ruifeng;WANG Ying(College of Geology Engineering and Geomatics,Chang'an University,Xi'an 710054,China;School of Oil and Gas Resources,Xi'an Petroleum University,Xi'an 710065,China)

机构地区：[1]长安大学地质工程与测绘学院,西安710054 [2]西安石油大学地球科学与工程学院,西安710065

出　　处：《物探化探计算技术》2018年第2期141-149,共9页Computing Techniques For Geophysical and Geochemical Exploration

基　　金：国家科技重大专项(20112x05024-001-03)

摘　　要：井间地震成像技术在解决复杂构造、油藏描述等方面具有较高的成像精度。高斯束偏移成像方法兼具Kirchhoff积分偏移的灵活性以及波动方程偏移的精确性,不仅计算速度快,并且运算精度高。在地面地震高斯束叠前深度偏移成像方法研究的基础上,首次将其应用于井间地震资料成像。针对井间理论模型试算,同井间地震波动方程逆时偏成像方法相比,井间地震高斯束叠前深度偏移方法成像精确,计算效率高。将该方法应用在某海上油田井间地震资料成像中,这里所研究的井间地震高斯束叠前深度偏移成像方法的成像结果,比海上三维地震剖面具有更高的分辨率,解决了海上三维地震分辨率不足的难题,可为油气田目的层微小构造识别提供有利依据,具有较好的应用前景。Cross-well seismic imaging technology has high imaging accuracy in solving complex structures and reservoir description.The Gaussian beam migration imaging method not only has the flexibility of Kirchhoff integral migration,but also has the accuracy of wave equation migration.Therefore,this method has a fast calculation speed and high accuracy.Based on the study of pre-stack depth migration imaging of ground seismic Gaussian beam,this method is first applied to cross-well seismic imaging in this article.In the aspects of cross-well theoretical model trial calculation,compared with the cross-well seismic wave equation reverse time migration method,the method of cross-well seismic Gaussian beam pre-stack depth migration has accurate imaging results and high computational efficiency.In addition,this method is applied to the imaging of cross-well seismic data of an offshore oilfield.The results show that this method has a higher resolution than the offshore 3D seismic section,thus solving the problem of the offshore 3D seismic insufficient resolution.Therefore,this method can provide favorable basis for the micro-structure identification of the target layer of oil and gas fields and has a good application prospect.

关 键 词：井间地震 高斯射线束 叠前偏移 成像 

分 类 号：P631.4[天文地球—地质矿产勘探]