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

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 arc made of low velocity anolnalies in Maigaiti Slope of TarimBasin which was discovered in the early stage of seismic activities, according to the rcsults of fineprocessing and lithologie special proccssing of the seismie data, togcthcr with drilling, geologieand logging data. Starting from both mean velocity and intcrval vclocity, we come to know thefeatures and the distribution regularitics of the low vclocity 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 zoncs of oil and gas enrichment have been forccastedwith seismie multiparameter fuzzy diagnosis tcchniques. Thc rescarch comcs to be a geologicsuccess.