焉耆盆地宝北地区高分辨率地震采集技术  

High-resolution seismic data acquisition techniques in Baobei area,Yanqi basin .

作　　者：王德志[1] 常玉举[2] 张付生[2] 曾鸾[2] 陈亚强[2] 

机构地区：[1]中国地质大学 [2]河南石油勘探局地质调查处

出　　处：《石油地球物理勘探》2003年第5期470-474,共5页Oil Geophysical Prospecting

摘　　要：通过焉耆盆地宝北地区高分辨率地震采集试验和科学论证 ,总结出一套适合该地区的地震勘探采集方法 :1采用双井微测井技术查明虚反射界面 ,进而确定合适的激发井深 ;2采用小基线距、小组内距接收和适当小药量激发可有效地提高地震资料的分辨率 ;3采用自然频率相对较高和高灵敏度加速度检波器 ;4适当深埋检波器 (埋深 5 0～ 6 0 cm ) ,改善排列噪声环境 ,尽量减少与地表有关的噪声 ;5正确选择观测系统和仪器因素。采用上述采集方法 ,主要勘探目的层反射的视主频达到 6 0～ 80 H z;与以往常规地震剖面相比 ,分辨率提高了 2～ 3倍 ;断层、地层尖灭、不整合等地质现象更加清楚。Through experiment and scientific proof of high-resolution seismic data acquisi tion techniques in Baobei area,Yanqi basin,the paper summed up a set of seism ic data acquisition measures suitable for the area:① adopting uphole survey i n double well to clarify the ghost reflector,then determining the suitable sho oting well depth;② adopting short group interval and short geophone interval for receiving and small charge size for shooting can effectively improve the res olution of seismic data;③ adopting accelerometer having relatively high natur al frequency and high sensibility;④ adequately deepening planted depth of geo phone (planted depth of 50~60 cm),improving noise environment of spread and doing our best to reduce the noise in relation to environment;⑤ correctly ch oosing geometry and apparatus factors.Adopting above-mentioned methods,the a pparent dominant frequency in major exploration targets can be 60~80 Hz;the resolution in creased 2~3 times as against former ordinary seismic section;the geologic features such as fault,pinch-out of formation and unconformity are m ore clear.

关 键 词：焉耆盆地 宝北地区 高分辨率 地震数据采集 激发 接收 虚反射 吸收衰减 油气勘探 

分 类 号：P618.13[天文地球—矿床学] P631.44[天文地球—地质学]