准东地区复杂构造区山前火成岩成像处理技术探讨  

The imaging processing technology of igneous in complicated structure in mountain front of the eastern Junggar basin

作　　者：屈元[1,2] 刁永波[2] 许勇[2] 吴松翰[2] 刘汉雄[2] 赵振伟[2] 

机构地区：[1]西南石油大学地球科学与技术学院,成都610500 [2]川庆钻探工程有限公司地球物理勘探公司,成都610213

出　　处：《物探化探计算技术》2016年第6期773-779,共7页Computing Techniques For Geophysical and Geochemical Exploration

摘　　要：火成岩油气藏作为一种非常规油气藏,越来越得到重视,成为世界油气产量新的增长点,准噶尔盆地东部石炭系火成岩发育,在近几年勘探攻关中,充分显示了该区山前带石炭系的勘探潜力。然而,火成岩对地震反射波具有很强的散射和屏蔽作用,造成地震资料信噪比低,成像差。准东地区石炭系火成岩具有埋藏较深,构造形态复杂,低降速带变化大,断裂发育等特点,加剧了火成岩地震资料的成像难度,制约了准东地区火成岩油气勘探的进程。这里主要以克拉美丽山山前带地震资料处理为例,提出了以保护低频信息为基础的保真去噪技术,以提高成像质量为目标的tomodel层析静校正技术,针对"高速层屏蔽"现象提出以常速扫描结合变速扫描为手段的速度分析方法。对该区偏移方法的适用性以及优选进行了分析和探讨,探索并总结出了一套适合在准噶尔盆地复杂构造区山前火成岩的成像处理技术,取得了较好的效果。Igneous rock reservoirs,a kind of unconventional reservoirs and as a new growth point of world＇s oil and gas production,is concerned more and more attention by people.However,igneous rock of seismic reflection wave has shield and scattering effect of hypostega,thus it results in seismic reflection data with low signal-to-noise ratio and poor seismic imaging.Exploration and research in recent years shows the full display piedmont exploration potential of the carboniferous in the Junggar basin,however,it increases the difficulty of seismic data imaging due to the following cases of：deep buried carboniferous igneous rocks,complicated structure form,the variations of low velocity zone,and characteristics of fracture development.These cases cannot meet the personnel fine structure interpretation,accurately depict trap morphology and geological requirements and others volcanic rock identification,which restricts the progress of igneous rock oil and gas exploration in the area.This paper tries to take the mountain front of Kelameili for example to explore a set of suitable for igneous imaging processing technology in complicated structure area in the Junggar basin piedmont.After low frequency protection,optimizing the use of static correction methods,the seismic data has been improved to better.

关 键 词：火成岩 成像处理 复杂构造区 山前带 准噶尔盆地 

分 类 号：P631.4[天文地球—地质矿产勘探]