摘要
首先简单回顾了地震各向异性理论与多分量地震勘探技术的国内外发展现状,然后针对石油工业领域需求,重点讨论了裂缝各向异性等效介质理论应用存在的问题。对于页岩、煤层等强各向异性介质,需要突破Thomsen理论的弱各向异性假设;对于多组多尺度裂缝型储层,需要从单斜介质模型的角度进一步丰富、发展现有的等效介质理论;而对于中国广泛分布的陆相薄互层储层,宽方位P波各向异性分析与S波分裂分析需要在正交各向异性介质的框架下重新认识波场特征,并厘定各向异性异常的影响因素。同时分析了多分量地震数据处理、解释分析中存在的不足,主要问题在于油气勘探开发的高精度要求与多分量地震数据处理技术不够完善所产生的不匹配。最后,提出了一些值得攻关研究的方向,重点在于现有的多分量地震数据处理需要进一步发展保矢量和动力学特征的方法技术,包括多分量的高维插值波场重建技术、宽方位OVT叠加技术、深海OBS/OBN稀疏采样成像技术以及大起伏海底条件下的PS波深度域偏移成像技术等。
We first introduce present development of seismic anisotropy theories and multi-component seismic technology,and then aiming at the interests of petroleum industry,discuss the problems faced by the equivalent medium theories and their applications at home and aboard.It is obvious that the limitation of Thomsen’s weak anisotropic theory needs to be re-considered for strong anisotropic media such as shale reservoirs and coal seams.To describe multi-azimuth and multi-scale fractured reservoirs,we need to start our research on monoclinic medium and improve the applicable equivalent theories.And for continental sedimentary reservoirs widely distributed,especially thin layered formations in China,we need to set up an orthogonal anisotropic model and re-delineate the characteristics of wave propagation to discriminate what causes P-wave anisotropic responses and what links shear-wave splitting and PP’s anisotropics with respect to fractured reservoirs.Also we analyze the defects of X-and Y-component processing and multi-wave interpretation,and conclude that,the processing technique of multi-component seismic data can’t match the need of oil and gas exploration and production,which seriously obstacles the application of multi-component seismics.Finally,we propose the most important researches to be started and traced,including methods of how to keep vector and kinetic characteristics during multi-component processing,methods of simultaneous and high-dimensional interpolation of X,Y,Z components,softwares for OVT sorting and stacking feasible to wide-azimuth PS data,methods of migrating PS-wave in OBS or OBN data with greatly rising and falling seafloor.
作者
王赟
文鹏飞
李宗杰
刘佳
李孟泽
WANG Yun;WEN Pengfei;LI Zongjie;LIU Jia;LI Mengze(MWMC Group,School of Geophysics and InformationTechnology,China University of Geosciences(Beijing),Beijing 100083,China;Key Laboratory of Marine Mineral Resources,Ministryof Natural Resources,Guangzhou,Guangdong 510075,China;Research Institute of Petroleum Exploration and Production,Sinopec Northwest China Oilfield Company,Urumuqi,Xinjiang 830011,China;BGP International,CNPC,Zhuozhou,Hebei 072751,China)
出处
《石油地球物理勘探》
EI
CSCD
北大核心
2020年第6期1395-1406,1168,共13页
Oil Geophysical Prospecting
基金
国家自然科学基金项目“六分量地震波场的模拟与观测”(U1839208)
中国石油化工股份有限公司研发项目“3D3C-VSP关键成像技术研究”(P18070-5)
中国石化西北分公司研发项目“顺北3井区断裂带及缝洞体目标Q偏移成像技术研究”(34400008-18-ZC0607-0030)
“塔河超深层VSP井震配套成像技术研究”(34400008-18-ZC0607-0031)联合资助
关键词
地震各向异性
多分量
裂缝
等效介质理论
矢量
动力学特征
seismic anisotropy
multi-component
fracture
equivalent medium theory
vector
kinetic characteristic
作者简介
王赟,博士,教授,1969年生,1992年获长春地质学院地球物理专业学士学位,1995年获中国地质大学北京研究生院地球物理专业硕士学位,1998年获中国科学院地球物理研究所固体地球物理专业博士学位,现在中国地质大学(北京)地球物理与信息技术学院主要从事地震各向异性理论与多分量地震技术的教学和研究,Email:wangyun@mail.gyig.ac.cn
