济阳坳陷西部馆陶组浅水辫状河三角洲沉积

Shallow braided river delta deposited in Guantao Formation of western Jiyang Depression

通过对砂体平面展布形态、岩性和岩相组合、泥岩及砂岩的颜色、测井曲线形态及沉积背景的研究,证实了济阳坳陷西部馆陶组发育浅水条件下的辫状河三角洲沉积,而不是陆上的河流相沉积。临盘油田大卢家地区馆三段主要发育浅水辫状河三角洲前缘亚相,并细分为水下辫状河道、河道间、前缘席状砂3种沉积微相。

The research of lateral distribution of sandbody,assemblage of li-thology or lithofacies,colors of mudstones and sandstones,shape of logging curves and sedimentary background proved that the Guantao Formation layers of western Jiyang Depression deposited shallow braided river delta instead of terrestrial fluvial facies. Front subfacies of the shallow braided river delta developed in Ng3 ,Dalujia area,Linpan Oilfield. Three kinds of microfacies are recognized,including underwater braided channel,interchannel,and frontier sheet sand.