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长兴期的海绵生物礁,在上扬子区的川东、鄂西及滇黔桂地区,近十多年来陆续多次发现,并成为天然气的重要产气部位。 我们在南方碳酸盐油气评价的国家攻关课题工作中,在无锡嵩山长兴期发现海绵生物礁。嵩山主要发育三叠化地层,其中二叠纪的长兴灰岩,因出露不全并未见底,厚度仅90多米,加之多处被辉绿岩脉穿插,不为人们重视,一般掩述为块状致密灰岩。实际上
The sponge reefs in Changxing period have been discovered many times in the eastern Sichuan, western Hubei, Yunnan, Guizhou and Guangxi regions in the upper Yangtze region over the past decade and have become important gas production sites for natural gas. We found sponge reefs in the Changxing period of Songshan, Wuxi, in the national research project on the assessment of carbonates in the South China Sea. Songshan mainly develops the Triassic strata. The Changxing limestone in the Permian, which has not bottomed out due to incomplete exposures, has a thickness of only 90 meters. In addition, many places are interbedded with diabase dikes, Massive limestone. In fact