扶余油层河湖频繁交替的比较沉积学依据

对松辽盆地下白垩统泉四段扶余油层检查井岩心及测井剖面观察发现,扶余油层沉积环境快速多变,灰绿色、紫红色泥岩交替出现,隔夹层稳定分布,在油层上部采收程度较高的情况下,油层下部出现了未动用油层。总结扶余油层的岩性、沉积相变化,发现其沉积环境与现代鄱阳湖沉积类似,两者都具有湖泊相、河流相沉积频繁交替出现的特点。将扶余油层与现代鄱阳湖进行比较沉积学研究,对比了扶余油层与现代鄱阳湖的沉积特征,提出扶余油层为与鄱阳湖沉积环境相类似的河湖交替相沉积的观点。

A Study of Comparative Sedimentology on Fuyu oilfield

According to the core and logging data of the fourth member of Quantou Formation, Fuyu oilfield has a rapidly changing sedimentary environment. The greyish-green and amaranth mudstone appeared alternately, and the interbeds has a stable distribution, so that the bottom of the oillayer still unexploited when the upper part has a high recovery percent. This paper contrast the sedimentary environment of Fuyu oilfield with Poyang Lake, which is located in south China, through comparative sedimentology method. And consider that they have the similar sedimentary facies. It is fluvial-lacustrine facies, which means fluvial facies and lacustrine facies converted in a very short time period and occurred repeatedly.