复杂断裂构造带三维地震勘探技术及效果  

3D Seismic Technique and Application for Exploration of Complex Fault Belt

作　　者：余功铭[1] 张永华[2] 梁运基[3] 李锋[2] 赵雨晴[3] 

机构地区：[1]中国地质大学,北京100083 [2]中国石油河南油田勘探开发研究院,河南南阳473132 [3]中国石油河南油田地调处,河南南阳473132

出　　处：《新疆石油地质》2007年第1期101-103,111,共4页Xinjiang Petroleum Geology

摘　　要：针对泌阳凹陷南部边界陡坡带复杂的地表及地下地质条件,提出了解决盆地边界构造破碎、断面倾角大、断裂带附近岩性横向变化剧烈等地质问题的办法,采取地质模型与数据采集、处理解释相结合的办法,通过计算机模拟实现观测系统的优化,利用微测井和小折射资料合理选择激发井深,在山前带采用钻孔埋置检波器。应用叠前深度偏移技术,使南部边界大断裂成像清楚,位置准确,小断层断点明显,地层接触关系清楚,便于地质人员分析解释。In view of the burial characteristics of exploration targets, complex surface and geological conditions in steep slope zone of southern Biyang sag, the problems such as the structural fragment, large fault plane dip angle in the basinal boundary and lateral lithology variation near the fault belt occurred during previous seismic exploration are analyzed, and corresponding methods for them are proposed. In order to solve these problems, the technicians responsible for data acquisition and processing as well as interpretation are cooperated together in line with the guide of geologic model to optimize observation system by computer modeling, select a reasonable shot depth by microlog and refraction data, and bury geophones by drilling hole in piedmont zone. For data processing, the prestack depth migration profile is used to make the imaging of boundary large fault planes distinct and their locations reliable, including that the minor fault points and the interlayer contacts are clear, so that it is convenient for geologists to make a precise interpretation.

关 键 词：泌阳凹陷 构造 地震解释 叠前偏移 正演 

分 类 号：P631.44[天文地球—地质矿产勘探]