Sedimentary Microfacies And Flow Units Research Of Xinmin Oilfield

Taking Fuyang oil bed in Xinmin Oilfeild as an example,applying three technology means of sedimentary microfacies research, reservoir bed heterogeneity research and flow unit research complexly, this thesis mainly pricks into the heterogeneity of fluvial facies, the rule of fluid flow and the distribution rule of remaining oil. Fuyang oil bed in Xinmin Oilfeild is a low permeability reservoir bed, this bed mainly consists of branch channels. In order to make sure the problems appeared in producing and the rule of waterflooding, as well as to grasp the features of remaining oil, this research further divides members into sedimentation units in plummet. Each sedimentation unit is in comply with a single channel period. Then through studying each sedimentation unit in terms of refine sedimentary microfacies with applying the genetic information in each wellpoint in each sedimentation unit, sedimentary microfacies and their theory pattern , as well as regional sedimentary system(including sedimentary system, deposit resource,face type and so on) this thesis try to confirm the sedimentary unit microfacies correctly . During the course of this research, the identification of absolute branch channel and the identification of the abandoned channel are crucial. On the basis of sedimentary microfacies, applying the heterogeneity of the reservoir bed macroscopically, the author thinks that the heterogeneity in Fuyang bed in Xinmin Oilfield is mainly controlled by the scale of branch channel and the bending of deserted channel. The smaller the scale of the channel is, the stronger is the heterogeneity; while the larger the bending of the channel is, the stronger is the heterogeneity. On this basis, through applying coefficient of storing and coefficient of filtering flow,the author divides the reservoir bed into four types of flow unit. Then throng using outcome of sedimentary microfacies and flow unit, the author studies the rule of waterflooding and the distribution rule of remaining oil. The author thinks that the degree of waterflooding in unit A is high and the remainder oil saturation low, but in unit B, the remainder oil saturation of remaining oil is high and the area is large, so it is the unit B that is the most potential one.