lower Miocene

基本解释

Good sealing conditions both upper and lateral with a shale content of more than 60% in upper Zhujiang group in Lower Miocene.
下中新統上珠江組蓋層泥巖含量不少於60％，圈閉有好的上封側堵條件。
The main hydrocarbon source rocks for the basins consist of lacustrine mud and lower coastal plain sediments from Oligocene to Middle Miocene.
盆地的主要烴源巖爲漸新世—中中新世湖相泥巖以及下海岸平原沉積。
The strata of Mesozoic and Cenozoic in the basin can be divided into three parts, Middle Jurassic (Longjiagou Formation ), Lower Cretaceous and Upper Miocene (Baode Formation ).
根據化石組郃，龍家溝盆地的地層可劃分爲中侏羅統龍家溝組，上白堊統及上中新統保德組。