沁水煤田Z探区地震资料静校正处理策略及评价  

Seismic Data Statics Processing Strategy and Evaluation in Z Exploration Area of Qinshui Coalfield

作　　者：霍嘉华 刘国鑫 刘建[3] HUO Jiahua;LIU Guoxin;LIU Jian(School of Earth Sciences and Engineering,Xi′an Shiyou University,Xi′an 710065,China;Shaanxi Provincial Key Laboratory of Oil and Gas Accumulation Geology,Xi′an 710065,China;Shanxi Institute of Geophysical and Chemical Exploration,Yuncheng Shanxi 044004,China)

机构地区：[1]西安石油大学地球科学与工程学院,西安710065 [2]陕西省油气成藏地质学重点实验室,西安710065 [3]山西省地球物理化学勘查院,山西运城044004

出　　处：《重庆科技学院学报（自然科学版）》2023年第2期51-57,共7页Journal of Chongqing University of Science and Technology：Natural Sciences Edition

基　　金：陕西省自然科学基础研究计划重点项目“地震异常波成像方法与技术研究”(2017JZ007);陕西省重点研发计划项目“矿井致灾地质因素地震探测关键技术研究”(2002Y-148)。

摘　　要：沁水煤田Z探区地表起伏大,低降速带厚度及速度横向变化大,探区地震资料的静校正问题严重影响其成像质量。通过剖析矿区地质背景及地震原始数据资料,筛选了影响该探区地震资料静校正的主要因素。研究结果表明,当Z探区替换速度为2500~2800 m s、初至拾取信息较好时,静校正后的单炮初至更聚焦、连续,初至时刻曲线更平滑,吻合度更高;2层模型的单炮记录更加适用于Z探区的静校正处理。经过2次剩余静校正后,叠加剖面的速度谱能量更聚焦,道集同相轴更连续。In Z exploration area of Qinshui coalfield,the surface undulates greatly,and the thickness and velocity of the low-velocity zone have great lateral variation,which makes the static correction of seismic data in this exploration area more prominent,and seriously affects the imaging quality of seismic data.By analyzing the geological background of the mining area and the original seismic data,the different factors affecting the static correction process in the area are summarized.The results show that when the replacement speed of the exploration area is 2500~2800 m s and the first break picking information is good,the first break of the single shot after static correction is more focused and continuous,the curve of the first break time is smoother,and the degree of coincidence is higher.And the single shot record of the two-layer model is more suitable for the static correction processing of the exploration area.After two residual statics,the velocity spectrum energy is more focused,and the gathers are more continuous.

关 键 词：静校正 沁水煤田 低降速带 地震勘探 

分 类 号：P631[天文地球—地质矿产勘探]