高精度重力协同地震识别潜山与断裂技术的开发应用  

Development and application of recognition technology for buried hill and fractures by high precision gravimetric and seismic methods

作　　者：揭景荣[1] 阎汉杰[1] 苗永康[2] 胡加山[2] 

机构地区：[1]中国石化股份胜利油田分公司物探研究院,山东东营257022 [2]中国科学院广州地球化学研究所,广东广州510640

出　　处：《油气地质与采收率》2008年第1期59-62,共4页Petroleum Geology and Recovery Efficiency

基　　金：国家“十五”攻关重大专项基金资助项目“济阳坳陷复杂隐蔽油气藏地质评价和勘探关键技术研究”(2001BA605A-09)

摘　　要：为配合高成熟探区的低位潜山勘探,挖掘高精度大比例尺重力的应用潜能,针对三维地震大区域捕捉低位潜山小目标的困难及其识别潜山、断裂的多解性,采用常规处理与特殊处理相结合的方法,应用特高次差值趋势面场源分离、恢复目标层背景的非线性坐标变换、凸显低位地质目标的变比例成图、拾取断裂与特殊岩体信息的随机异常成像等技术,建立了高精度重力协同地震识别潜山与断裂的处理解释流程。通过在济阳坳陷—临清坳陷,特别是沾化地区的应用,表明高精度重力在三维地震覆盖地区也可在大区域快速捕捉低位潜山以及在综合识别潜山、断裂上发挥其特殊的作用。In view of the difficulties of locating the small targets of low buried hills and ihe ambiguity of identifying buried hill and fractures in 3D seismic large regions,conventional processing and special processing were combined to adapt the low buried hills prospecting in the areas with higher exploration degree and probe the application potential of high accuracy and big scale gravimetric methods.Processing and interpretation procedure of recognizing the buried hills and fractures was established using high precision gravimetric and seismic methods and some particular technologies such as field-source separation on extra high order difference trend surface,non-linear coordinate transform of recovering the background of target strata,scale variable mapping of revealing low geological targets,and random abnormal imaging of picking the information about fractures and special rocks.After application in Jiyang-Linqing Depression,especially in Zhanhua area,the result indicates that high precision gravimetric method is favorable of speedily locating low buried hills in a large region in 3D seismic area and may play a special role in integrated i-dentifying the buried hill and fractures.

关 键 词：高精度重力 地震 潜山 断裂 

分 类 号：P631.4[天文地球—地质矿产勘探]