鄂西-渝东地区生物礁发育特征及油气勘探潜力

通过对井下和露头中典型生物礁发育特征的对比及对已知潜伏生物礁地震响应特征的分析，对鄂西－渝东地区潜伏生物礁进行了初步预测。研究表明：本区东部晚二叠世入于台、盆过渡相区，具备发育大型台地边缘堤礁的有利条件，西部潜伏区则以发育大量台内点礁为特征；潜伏台内点礁虽然分布随机，但成藏条件优越，而且数量多，资源潜力巨大。

Reef development characteristics and hydrocarbon explorating potential of the Permian Changxing formation in western Hubei and eastern Sichuan

The upper Permian Changxing reef is well developed in western Hubei and eastern Sichuan area.The typic downhole reef development characteristics are compared with those of outcrop reef,and the seismic response characteristics of known buried reef are analyzed. The preliminary predication about the development of buried reef is conducted .Research has indicated that the eastern area was at transitional facies between platform facies and basinal facies at later Permian ,and the condition was favourable for the development of a large scale platform edge barrier reef.While in the western buried area,a large quantity of intraplatform point reef have developed.Though the buried intraplatform point reef distributed randomly,the condition for reservoir formation was excellent.In addition,the quantity of the buried intraplatform point reef is very large,and its hydrocarbon resources potential is great.It is very significant for the present hydrocarbon exploration.