塔里木盆地麦盖提斜坡地震低速异常研究

The research of seismic low velocity anomaly in Maigaiti Slope of Tarim Basin

1. 西北石油地质局第一物探大队, 乌鲁木齐 830011;2. 成都理工学院地球物理系, 成都 610059

The First Geophysical Prospeeting Crew, Xibei Petroleum Geology Bureau, Urumqi 830011

本文以本区最早期地震工作所发现的地震低速异常为靶标．利用地震资料精细处理及岩性特殊处理的成果,结合钻井、地质、测井等资料对该地震低速异常进行了深入的跨学科综合研究。从平均速度和层速度两方面入手,掌握了本区低速异常的特征及展布规律。运用层序地层学等方法对低速异常的性质进行了分析和探讨；并运用岩性地震理论对本区地震低速异常的含油气性进行了综合评价。通过地震多参量模糊判别技术的应用,预测出本区的两块油气富集带．此项研究取得了良好的地质效果。

Deep multidisciplinary studics are made of low velocity anolnalies in Maigaiti Slope of TarimBasin which was discovered in the early stage of seismic activities, according to the results of fineprocessing and lithologie special proccssing of the seismie data, togcther with drilling, geologieand logging data. Starting from both mean velocity and intcrval velocity, we come to know the features and the distribution regularities of the low velocity anomaly in this area. The propertics ofthe low velocity anomaly are analysed and discussed with scqucnce stratigraphy method and othermethods, and with lithologic seismic theory the hydrocarbon-bearing propert ies arecomprehcnsively cvaluated. And finally two zones of oil and gas enrichment have been forecastedwith seismie multiparameter fuzzy diagnosis tcchniques. the rescareh comes to be a geologicsuccess.