泥盆系在雪峰古陆东南侧——湘中地区广泛分布。其中中促盆统棋梓桥组(D_2q)是生物礁最发育的层位。国外对碳酸盐岩油气勘探的实践说明,生物礁是良好的储集岩。因此,我们对海相沉积区的生物礁也应予以重视。 湘中(涟源、邵阳地区)晚古生代的海侵开始于中泥盆世跳马涧期,海水由南向北侵入,为滨海碎屑岩沉积。至中泥盆世棋梓桥期,地壳剧烈沉降,海侵范围扩大,形 Devonian system in the southeastern side of Xuefeng ancient land - widely distributed in central Hunan. Among them, Central basin Zhiziqiao Formation (D_2q) is the most developed horizon of reefs. Foreign practice of carbonate exploration for oil and gas shows that reefs are good reservoir rocks. Therefore, we should pay attention to the reefs in marine sedimentary areas. The late Paleozoic transgression in the middle Hunan (Lianyuan and Shaoyang) began in the mid-Devonian period of Jianmajian, and intrusion of seawater from south to north made sedimentary clastic rocks. During the Middle Paleolithic Qixia period, the crust was drastically subsided, and the transgression range expanded