江陵凹陷白垩系红花套组沙漠沉积相分析

Desert sedimentary facies analysis of Honghuatao formation of Cretaceous system in Jiangling sag

在江陵凹陷发现了一套新的含油层系,即白垩系红花套组油藏,但其沉积环境是个有争议的话题。以区域地质背景综合分析为基础,通过野外露头剖面观察和岩心观察,在研究地层颜色、岩性组合、砂岩矿物成分、砂岩粒度特征、砂粒表面特征、古生物组合特征、沉积构造特征的基础上,综合认为江陵凹陷红花套组为沙漠沉积,并参考现代沙漠沉积相类型,进行沉积相类型的划分。

With the increasing efforts of hydrocarbon exploration, a new oil-bearing series, Honghuatao formation of Cretaceous, has been found in Jiangling sag and therefore, a big breakthrough has been made in hydrocarbon exploration. While the research on paleo-desert deposit is limited and the sedimentary environment is always a controversial subject. Based on regional geologic setting analysis, field outcrop profile observation and coring observation, in combination with strata color, lithology combination, mineral composition and grain size parameters of sandstone, sand surface characteristics, combination characteristics of paleontology and sedimentary structure characteristics, the Honghuatao formation is considered to be desert deposit. Referring to sedimentary facies types of modern desert deposit, the types of sedimentary facies have been classified.