| The views of flow unit point out that heterogeneity of reservoirs should be deeply studied and interpreted in terms of reservoir geology, from interbed, latitude and thin-layer to pore-throat. They can also be used to pose the orbits and differences of reservoir fluids. So the study of flow unit is a bridge connecting reservoir geological characteristics and dynamic oil developments. The inter-well-contrasting and frame-building are depended on delicate study of modern sediments and random modeling. Out of large number of studies on the synthetic interdisciplinary and so much technological engineering, this article chooses the puzzling project for low permeable conglomerate reservoirs of Northwest Bounder in Jungaer Basin. Based on existing contradictions during later period of waterflood recovery, we find a sort of theories and skills of flow unit, which are suitable to reservoir geological characteristics, and we are challenging continuously the oil recovery limit of low permeable conglomerate reservoirs.Due to the heterogeneity of low permeable conglomerate reservoirs, the waterflood development of reservoir is much more complex than layered sandstone reservoir. Waterflood development of low permeable nonline reservoirs is very difficult, so study of flow unit for low permeable conglomerate reservoirs may be in advancing edge. Beyond the latest research of flow unit at home and abroad recent 20 years' research, this article advances that study of flow unit is out of a new interdisciplinary between static geology and dynamic reservoir engineering. We must concern the fluid factors, and realize that equal influent feature is the most basic character. The study is not limited to division of sedimentary microfacies and evaluation of reservoirs; only when fluid features and outer oil recovery techniques are included, it could show the influent differences of oil and water in the space of reservoirs. Therefore, the contents of this article are widely involved high division and contrast of flow unit, study of bounder conditions, the techniques and methods of the study, classification and evaluation of the study, building of flow unit model and utilization of flow unit. Each part stresses the binding of static and dynamic data, and pays attention to the influent differences of reservoir fluids.based on the studies of flow unit for low permeable conglomerate reservoirs, the follow conclusions are derived:1) four factors using to evaluate flow ability of subsurface fluids are natural condition, boundary condition, fluid condition and outer conditions of oil recoverytechniques;2) subdivision and contrast of lithofacies unit is the important base of the study of flow unit, and lithofacies unit, heterogeneity unit, and flow unit are not same but tighly relative, what's more the raise of sedimentary pause surface provides sedimentary references to vertical subdivision and lateral contrast of flow unit;3) flow unit, a geologic vector, has definite direction, which mainly is controlled by sedimentary and tectonic conditions of reservoirs, and the direction is expressed as twofold anisotropy, and then the difference of flow unit in 3D connective reservoirs controls mainly the difference of waterflood efficiency, meanwhile it directly influences the effectiveness of waterflood oil recovery for continental heterogeneous reservoirs;4) West Wu2 Reservoirs of Lower Kuramay Fm.^k1) can be divided into four types of flow units, and their difference is the main reason for differences of waterflood efficiency for these 3D connective oil beds of block low permeable conglomerate reservoirs.5) with resolves of flow unit, we can judge lateral conformance effective of water flood, analyze vertical water out degree, anticipate drawdown, prospect the distribution of remnant oil, and provide overall reservoir static and dynamic models for reservoir numerical simulation, so it raises a important way for improving oil recovery during latter period of oilfield development.
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