利川地区页岩气地震勘探采集方法研究  

A Study of Shale Gas Seismic Acquisition Method in Lichuan Area

作　　者：谢丹 XIE Dan(Geography Information Exploration Company,Sinopec Oilfield Service Jianghan Corporation,Qianjiang,Hubei,433100China)

机构地区：[1]中石化地球物理有限公司武汉勘查公司

出　　处：《江汉石油职工大学学报》2019年第4期4-7,共4页Journal of Jianghan Petroleum University of Staff and Workers

摘　　要：利川地区涉及利川复向斜、中央复向斜等二级构造单元,志留系龙马溪组泥页岩气埋深适中,是寻找页岩气的有利区带。复杂多变的地震地质条件是制约该区页岩气勘探的主要因素:地形切割剧烈、地表岩性变化较大,激发和接收条件差;加之断裂发育,构造变形强烈,构造接触带反射波组特征不明显,基本为杂乱反射。在研究生产资料和试验资料的基础上,从降低不同激发条件下资料品质的差异性,保证能量、频率的一致性、如何降低干扰波的影响,提高资料的信噪比、提高复杂构造区的成像效果,特别针对影响该区页岩气勘探的敏感因素寻找突破口,以达到圆满完成地质任务的目的。Lichuan Area is a favorable zone for searching shale gas where there are secondary tectonic units such as Lichuan synclinorium and central synclinorium and buried depth of shale gas is moderate in Siluric Longmaxi Formation.Complex and changeable seismic geological condition is the main factor for restricting its shale gas exploration:fierce geography cutting,great surface lithological changes and poor shooting and receiving conditions together with developed faults,strong tectonic deformation as well as less obvious reflection wave group features.To finish the geological tasks,this paper studies the ways of reducing the differences of data quality under different shooting conditions,guaranteeing consistency of energy and frequency,decreasing disturbing wave influence,increasing data's SNR and improving imaging effect in complex tectonic region.

关 键 词：页岩气 地震地质条件 干扰波 构造成像 地震采集方法 

分 类 号：P631.4[天文地球—地质矿产勘探] P618.13[天文地球—地质学]