四川盆地东北部二叠系沉积相及其演化分析
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摘要
在对四川盆地东北部宣汉县渡口镇羊鼓洞二叠系剖面详细研究的基础上,结合测井、地震等资料,对四川盆地东北部二叠系沉积相进行了分析,识别出了滨岸沼泽相、台地蒸发岩相、局限台地相、开阔台地相、台地边缘生物礁滩相、碳酸盐岩缓坡相和台盆相等7种沉积相带。指出二叠纪研究区发育下二叠统梁山组沉积期、栖霞组—茅口组沉积期和上二叠统吴家坪组—长兴组沉积期3次大的海侵—海退沉积旋回。在沉积演化和古地理分布研究的基础上,建立了研究区碳酸盐岩的沉积演化模式。
By the research of outcrop profiles,logging profiles,logs and seismic data,seven types of sedimentary facies have been recognized on Permian Yanggudong profile in the Dukou town,Xuanhan County,NE Sichuan basin.The seven facies including strand swamp facies,platform evaporate facies,restraint platform facies,open platform facies,platform marginal reef facies,shelving facies and basinal facies.The study area developed three big transgressive-regressive cycles in the Permian period.On the basis of research of sedimentary evolution and palaeogeographic distribution,the sedimentary evolution model of carbonate facies is built in the northeast of the Sichuan basin.
By the research of outcrop profiles,logging profiles,logs and seismic data,seven types of sedimentary facies have been recognized on Permian Yanggudong profile in the Dukou town,Xuanhan County,NE Sichuan basin.The seven facies including strand swamp facies,platform evaporate facies,restraint platform facies,open platform facies,platform marginal reef facies,shelving facies and basinal facies.The study area developed three big transgressive-regressive cycles in the Permian period.On the basis of research of sedimentary evolution and palaeogeographic distribution,the sedimentary evolution model of carbonate facies is built in the northeast of the Sichuan basin.
引文
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[2]马永生,牟传龙,谭钦银,等.关于开江-梁平海槽的认识[J].石油与天然气地质,2006,27(3):326-331.
[3]马永生,牟传龙,郭彤楼,等.四川盆地东北部长兴组层序地层与储层分布[J].地学前缘,2005,12(3):179-185.
[4]李霞,胡明毅,李士祥.龙门山米苍山前缘二叠系碳酸盐缓坡沉积[J].石油天然气学报:江汉石油学院学报,2005,27(1):36-37.
[5]牟传龙,谭钦银,余谦,等.川东北地区上二叠统长兴组生物礁组成及成礁模式[J].沉积与特提斯地质,2004,24(3):65-71.
[6]毕长春,李联新,梅燕,等.川东长兴组生物礁分布控制因素及地震识别技术[J].天然气地球科学,2007,18(4):509-513.
[7]李凤杰,赵俊兴.基于Matlab的测井曲线频谱分析及其在地质研究中的应用——以川东北地区二叠系长兴组为例[J].天然气地球科学,2007,18(4):531-534.
[8]李凤杰,郑荣才,罗清林,等.四川盆地东北地区长兴组米兰科维奇周期分析[J].中国矿业大学学报,2007,36(6):805-810
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