The Lower Silurian Shiniulan formation in southern Sichuan province has been the focus of oil and gas exploration due to well oil and gas display there.However,viewpoint about sedimentary facies model and distribution of the formation is still different.Field sections,well log,thin sections and geo-chemical data are checked and distribution and sedimentary facies model in southern Sichuan province studied.Shiniulan formation in southern and Southwest Sichuan province is dominated by carbonate rock sedimentary facies.From the carbonate rock sub-sedimentary facies:middle gentle slope,outer gentle slope,open platform,marginal reef beach facies and front sedimentary facies of the platform are recog-nized.The east and west ends of the formation are limited by terriginous debris,in the north is continen-tal shelf deposit.In the early stage of the formation is developed gentle slope carbonate rock sedimentary facies,in the late stage turns to platform sedimentary model and carbonate rock sedimentary rate of biotic uplift increases.Sedimentary rate of the carbonate rock is higher than that of debris.The sedimentary rate difference is the factor for the transformation of the sedimentary facies model.
关键词
石牛栏组/沉积相/岩相古地理/沉积模式/川南地区
Key words
Shiniulan formation/sedimentary fancies/Lithofacies paleo-geography/sedimentary mod-el/southern Sichuan province
维普
万方数据