摘要
通过钻井、露头、地震等资料分析,对四川盆地北部地区二三叠系沉积相进行详细研究,识别出碳酸盐岩台地、碳酸盐岩缓坡两大沉积体系,指出研究区二三叠系沉积具有典型的从碳酸盐岩缓坡演化为碳酸盐岩镶边台地沉积的演化过程,中二叠统栖霞组、茅口组及上二叠统吴家坪组发育碳酸盐岩缓坡沉积,上二叠统长兴组过渡为碳酸盐岩镶边台地,飞仙关组沉积末期全区演化为均一化台地。研究成果对本区油气勘探具有一定的参考价值。
The sedimentary facies of the permian and triassic strata in the north of Sichuan Basin is detailedly studied on the basis of sedimentary facies of single wells, seismic data as well as surface outcrop data. Two depositional systems are recognized, and they are carbonate platform and carbonate ramp. On the basis of depositional facies analysis and comprehensive consideration of paleogeography, sedimentary environment, the sedimentary evolution of permian and triassic stratan is cleared. The process is from carbonate ramp to carbonate platform. The sedimentary system of lower Permian Qixia formation, Maokou formation and upper Permian Wujiaping formation are carbonate ramp, and the sedimentary system of changing formation is rimmed carbonate platform. Till the late Early Traissic Epoch, the north of the Sichuan basin evolved to uniform carbonate platform. The result may be a reference to the exploration of Sichuan Basin.
出处
《科技导报》
CAS
CSCD
北大核心
2014年第6期45-53,共9页
Science & Technology Review
关键词
四川盆地北部
沉积相
沉积演化
north of Sichuan Basin
sedimentary facies
sedimentary evolution
