特种油气藏2012，Vol.19Issue(2)：50-53,4.
准噶尔盆地南缘复杂构造变速成图方法及效果分析
摘要
Abstract
Thick conglomerate had developed in the shallow formation in the west part of the thrust belt on the south margin of Jung-gar Basin. The conglomerate segment shows no energy group on seismic velocity spectrum, the true formation velocity of the conglomerate segment can not be reflected, thereby resulted in low accuracy in velocity mapping. In the middle and east part of the south margin, favorable targets are mostly steep structures, overthrust structures are common, both lateral and vertical formation velocities change drastically, the previous velocity modeling did not represent the shallow overthrust structures, thus resulted in low accuracy in variable velocity mapping for deep target formations. Based on the characteristics of variable velocity mapping for the south margin of Junggar Basin, marker bed has been used to correct velocity anomaly, eliminate the effect of abnormal seismic spectral points, and improve the quality of seismic velocity. The distribution and impact of velocity anomaly in deep formations are basically understood by using velocity anomaly analysis method. A velocity model has been set up to establish a reasonable velocity field by u-sing variable velocity filling with drilling formation velocity and considering overthrust structures. The application of the above technical measures has provided reliable structure maps for oil and gas exploration in the thrust belt of the south margin of Junggar Basin, and has played an important role in the exploration in this area.关键词
准噶尔盆地南缘/浅层砾岩/速度异常/变速成图Key words
south margin of Junggar Basin/ shallow conglomerate/ velocity anomaly/ variable velocity mapping分类
能源科技引用本文复制引用
许海涛,景海璐,阿依努尔,常庆龙..准噶尔盆地南缘复杂构造变速成图方法及效果分析[J].特种油气藏,2012,19(2):50-53,4.基金项目
中油新疆油田公司"准南前陆盆地油气富集规律与勘探目标评价"(y2011-090) （y2011-090）
中油东方公司"准南前陆盆地油气富集规律与勘探目标评价"(BGP201102745) （BGP201102745）
