Zhanhua Sag The Wuhaozhuang Oilfield Pile 39 Wells Sha Three Sections Of Reservoir Flow Units

This paper is focused on characterization of reservoir flow units of the third Shahejie Formation of Zhuang 39 Block in Wuhaozhuang Oilfield in Zhanhua Sag. The sedimentary facies of reservoir is a typical terrestrial braid deltas and fan-deltas sediment, the microfacies of which quickly change both vertically and horizontally, complicated distribution and high characteristics of reservoir heterogeneity. Taking this characteristic and geological reality of the oilfield into account, a set of research methods and technology of reservoir flow units are suggested and performed.The flow units research is divided into four steps: the first step is to establish isochronal formation framework on the base of the fine isochronal stratigraphic division and correlation. With the isochronal formation framework, the second one is to study sedimentary microfacies and sandbody architecture, using various data and methods, and to establish architecture model of reservoir. The third step is to establish the model of the flow barriers and to identify connecting sandbodies and flow barriers and to analyze the reservoir quality differences of the same connecting sandbody. Finally using various parameters reflecting the flow and storage capability and lithofacies of reservoir, the reservoir quality of sandbodies is evaluated. Four kinds of flow units are identified according to reservoir quality and the distribution models of reservoir flow units of two-dimension and three-dimension are established. This research is not only theoretically important to supplement hydrocarbon reservoir geology, but has a practical significance. The research shows that flow units can control the distribution and output ability of oil and gas oilfield.