Abstract: A study on the characteristics,patterns,and controlling factors of hydrocarbon pooling in Minfeng sag reveals that the sag occupies an advantageous place for oil pooling in the northeastern margin of Dongying depression.The Paleogene lithologic oil reservoirs are mainly sand lens reservoirs,updip pinchout sandbody,and sandbody reservoirs cut through by faults.Major controlling factors of the lithologic oil reservoirs include the properties and distribution of delta front sandbodies and fluxoturbidite sandbodies,the favorable structural location within the distributions of sandbodies,and the prospective sedimentary reservoir facies belts.It is suggested that the exploration be focused on the delta front and fluxoturbidite reservoir sandbodies of different ages formed in difference structural positions.

Key words: lithologic oil reservoir, control factors, delta,fluxoturbidite, Minfeng sag, Jiyang depression