塔里木盆地地震反射异常体及其地质属性初探

塔里林棼国地面积大，地层发育齐全，已被地震测网覆盖，通过对全盆地地震剖面的对比解释，发现在不同层系中，如奥陶系，石炭系和第三系等，存在很多地震反射异常体，这些“异常体”多数为沉积作用形成，部分已被钻探证帝为特征地质体，大部分异常体还未进行钻探。

Pilot study on seismic anomaly body and its geological characteristics in Tarim basin

In Tarim basin there are many seismic anomaly bodies in the Ordovician, Carboniferous and Permian which are mostly caused by sedimentary and structure process. Some of them have been discovered and proved by drilling well and most of them are not. Based on the seismic reflection characteristics and inside reflection structure these seismic anomaly bodies could be classified into 9 kinds as downward cut, wedge, mound diagonal forest, mushroom, arborization, pillow, dome, down concave and lenticular bodies. Depending on the study of sedimentary environment, seismic velocity analysis and synthetic sonic logs proceeding, most of them are confirmed as nonmarine paleo-channel bar or marine reef and organic bank with good reservoir condition. They will become exploration targets if nearby there have sufficient hydrocarbon source. To a favorable seismic anomaly body research work of geophysics, geology and logging must be united and the comprehensive study should go deeply to reduce the exploration risk and get a good result.