准南呼图壁地区复杂构造速度建模及应用  

Modeling and Application of Complex Tectonic Velocity in the Zhunnan Hutubi area

作　　者：苏艳丽 习宇霄 王晓涛 肖艳玲 Su Yanli;Xi Yuxiao;Wang Xiaotao;Xiao Yanling(Xinjiang Oilfield Branch PetroChina,Urumqi,Xinjiang,830000,China)

机构地区：[1]中国石油新疆油田分公司,新疆乌鲁木齐830000

出　　处：《新疆地质》2024年第4期661-666,共6页Xinjiang Geology

基　　金：中国石油股份公司重大科技专项超深层碎屑岩油气规模增储上产与勘探开发技术研究项目(2023ZZ14)资助。

摘　　要：变速成图、深度域成像及压力预测等一系列地震勘探工作均与速度息息相关,高精度速度是落实构造圈闭、指导钻井安全钻进的关键。本文分析了地震均方根速度直接用于构造成图、压力预测研究中存在的问题和不足,依据研究区地质和速度资料,利用地震反演速度提高了纵向分辨率,再结合地震均方根转层速度横向变化优势,通过频率域融合方法实现了速度体的纵横向变速充填,恢复了地下真实的速度结构,为准噶尔盆地南缘复杂构造圈闭的落实及钻前压力预测提供了可靠的速度基础资料。A series of seismic exploration tasks such as variable velocity mapping,depth domain imaging,and pressure prediction are all closely related to velocity.High-precision velocity is the key to implementing structural traps and guiding the safe drilling of wells.This paper analyzes the problems and deficiencies existing in the direct application of seismic root mean square velocity in structural mapping and pressure prediction studies.Based on the characteristics of geological and velocity data in the study area,the vertical resolution is improved by using seismic inversion velocity.Combined with the lateral variation advantage of seismic root mean square layer velocity,the vertical and horizontal variable velocity filling of the velocity volume is achieved through the frequency domain fusion method,restoring the true underground velocity structure.It provides reliable velocity basic data for the implementation of complex structural traps and pre-drilling pressure prediction at the southern margin of the Junggar Basin.

关 键 词：地震均方根速度 构造成图 压力预测 纵向分辨率 频率域融合 

分 类 号：P631.4[天文地球—地质矿产勘探]