Study On Reservoir Configuration Of Quantou Four Section In East16-2Blocks Of Fuyu Oilfield

With the development of the oilfield, oilfields which developed in early years has entered into later containing high percentage of water in exploitation, and facing severe a development situation.Research shows that,an amount of the remaining oil are in the long-term Water flooded invasion reservoir. The remaining oil is under control of the reservoir configuration. Therefore, the study of underground reservoir configuration plays an important role in exploitation of remaining oil.The most areas of the Fuyu oil production plants in Jilin oilfield has already entered the stage of containing high percentage of water, and the recovery rate is relatively low, thus the oilfield is facing a severe situation in development. The main issue that facing the research area is refinement and deepening problems of reservoir geological study, the point is fine depict single sand bodies and the distribution of Insulation sandwich. The fundamental reason is that in the late development of continental reservoirs reservoir, the conventional reservoir description research which based on small layers already cannot satisfy the needs of remaining oil prediction, but need further insight into the internal configuration of sand bodies in small layers, and the study of the seepage barrier between or inside the single sand bodies.Fuyu oilfield is located in Fuxin uplift belt in the third Fuyu structure, and affected by many faults for dome anticline. Its reservoir fractures develop well, and controlled by the tectonic, it belongs to the fractured sandstone structure of reservoir. The reservoir is mainly siltstone and fine sandstone. The east16-2blocks of Fuyu is located in the southeast of the fuyu oilfield.Based on the high resolution sequence stratigraphy, considering the channel sand body incised, loss of superimposed channel sand body, formation, sedimentary facies lateral change and other factors, established the objective interval isochronous stratigraphic framework in studied area, completed the small layer division and contrast, divided the fuyu reservoir into four groups,13small layers.East16-2sedimentary facies studies suggest that a sand block Fuyu oil layer deposition delta front group, the main sedimentary microfacies are:Underwater distributary channel, overbank underwater sand body, mouth bar, far Shaba, underwater distributary bay, sheet sand other microfacies;2,3,4group delta plain of sand, there are major sedimentary microfacies:distributary channel, overbank sand, crevasse splay, split between the Gulf of other microfacies.Through the development of which10small layer composite channel sand body33 monosandbody division and sectional anatomy showed a small layer of single vertical stack with river sand surface contact relationship categories are:isolated type, docking, cutting stacked, stacking and compoundIn every sandwich on the basis of identification and research, the establishment of a single well every sandwich type and model evaluation every sandwich lateral continuity, determine the distribution characteristics of every sandwich.Through the study of3,4,5,6-level reservoir architecture reveals the East Block16-2composite channel, single channel, compartment, mezzanine four kinds of configuration elements. Provenance mainly to the southwest, according to the scale of discrimination river, the width of a single distributary channel is generally about120m. According to the quantitative characterization of mezzanine, mezzanine inclination generally nearly horizontal thickness of about0.72m, provenance extends along at about80-250m, hanging provenance extends about50-100m.The study of fuyu oil layer delta reservoir internal configuration in-depth anatomy, and form a set of systems reservoir internal configuration analysis method about underwater distributary channel. Use the log data of dense well pattern, combined with the feature of sedimentary microfacies in plane and profile, comprehensive research the characteristics of compound channel, single channel and single genetic sand body. Within the composite channel sand body, use the channel cut folding patterns, elevation difference and abandoned channel technology identify the single channel sand body scale, experience formula method is adopted to define the scale of the dam, in the guidance of single channel space combination model, finely described the features and manifestations of reservoir configuration unit. While in this mode, the paper analyzed the sandwich insulation in the distribution characteristics of studied area, using the data of production dynamic analysis verified, to guide the fine reservoir research of other similar oilfields, it is not only for oil field development and residual oil distribution prediction has great practical significance, but also for the development of the discipline of reservoir geology has important guiding significance to the comprehensive promotion.