盐湖盆地浅水三角洲沉积模式——以江汉盆地潜江凹陷新沟咀组为例

本文通过岩心、测井、录井资料,结合研究区古气候特征、岩性特征、古生物标志和沉积构造特征,提出江汉油田潜江凹陷新沟咀组属于盐湖盆地浅水湖泊三角洲沉积。在盐湖沉积背景下,新沟咀组沉积时期气候相对干旱,水体较浅,无深湖-半深湖沉积,且研究区地势平缓,倾角相对较小,在河流入湖处发育浅水三角洲沉积体系,并且发育三角洲平原、三角洲前缘和前三角洲泥三种沉积亚相。以沉积相平面分布图为基础,建立了新沟咀组浅水三角洲沉积模式。

Sedimentary model for the shallow-water delta deposits in the salt lake basin: An example from the Xingouzui Formation in the Jianghan Basin, Hubei

The Xingouzui Formation in the Qianjiang depression,Jianghan Oil Field is interpreted to be assembled by the shallow-water lacustrine delta deposits in the salt lake basin in terms of core examination,well logs,palaeoclimate,lithology,palaeontology and sedimentary structures.During the deposition of the Xingouzui Formation,the climates were relatively dry;the lake water was relatively shallow,and no abyssal-bathyal deposits were laid down.There occur the shallow-water delta depositional systems in the inlet...