湘中碳酸盐岩出露区的地震工作

SEISMIC WORK IN HILLY LAND WITH OUTCROPPING CARBONATITE, CENTRE DISTRICT, HUNAN PROVINCE

位于湘中拗陷中部的邵阳凹陷是南方找油的重点地区之一。工区地表为低丘地形,出露下石炭系灰岩,潜水面较深,裂隙、溶洞发育,地表地震地质条件很差,但深部地震地质条件较好。进行地震攻关试验工作以来,初步获得了一些有意义的反射资料,为碳酸盐岩出露区地震工作提供了一些认识和分析的依据。

Shaoyang seg, which is situated at the centre of Xiangzhong depression,is one of the priority region for oil exploration in South China. The area is characterized by its rolling hills, where the limestone of Lower Carboniferous System is exposed to the weather, the underground water level is in the depth, the crevasse and karst are widely dispersed. The seismic-geologic conditions on surface are quite unfavourable but quite good in depth.In order to get reflections from limestone surface, we've made a series of tests in recent years and some reflection data interesting to us which might provide something useful for the facing tasks were obtain-ed.