Meticulous Reservoir Description Of YF Oilfield

YF oil field, belong to the eastern end of middle southern fault terrace of Qintong depression, Dongtai depression, Subei Basin structure. After years of development, the oilfield is now Currently facing a series of questions, just like unconnected of fault blocks, bad Correspond Relationship between Injection and acquisition, low level of exploit, low water injection rate, fast rising injection pressure, serious interference between layer and interlayer caused by reservoir heterogeneity, low natural production caused by well large segment of commingled, and so on. In view of the above, for the YF oilfield development Status, we must do detailed and accurate description and evaluation of YF oilfield reservoir, to provide a theoretical basis for the next adjustment of the development program.By the establishment of meticulous3D geological model, and carry out the corre-sponding basic geological research work, we get a further understanding of Structural characteristics, reservoir characteristics and reservoir characteristics of the YF field. In particular, the3D geological model provide a more complete research platform for the reservoir studies, Increased the reservoir study from the previous two-dimensional research to the comprehensive study of whole three-dimensional, And laid a good foundation for the reservoir development measures proposed adjustments.Taizhou grbup of the study area bottom-up is a complete set of water into positive cycle sedimentation, from top to bottom can be divided into Ⅰ, Ⅱ,Ⅲ, three oil group,14small layer. Funing group Ⅰ zone deposition of bottom-up from coarse to fine formed of three cycles, top-down can also be divided into Ⅰ, Ⅱ, Ⅲ, three oil groups,16small layers. The direction of the local provenance of the study area is mainly to the north, slightly different to the direction of the deposition area. Taizhou group is underwater alluvial deposition, it can be divided into three sub-facies, that is the root-fan, mid-fan and front-fan side (shallow lake subfacies). Early Funing group Ⅰ zone is flood plain fluvial facies can be divided into two sub-phase of the riverbed and embankment.The study area is a lithology structure reservoir, the reservoir sandstones has a relatively poor physical properties and low reservoir capacity. In internal reservoir of the fault block have a better connectivity, the connectivity of the reservoir between fault blocks is mainly affected by the butt relationship between both sides. Funing formation Ⅲ zone reservoir is development, the reservoir is a layered reservoir filled with a high degree of oil. Taizhou formation reservoirs mainly in the Ⅱ, Ⅲ, oil groups as massive low-water reservoir.With the modeling software, we fix the fault model of the study area (The total number of faults occurred from12to14and the location of a large mobile), Establish the structural model of the study area, on this basis calculated and established a facies model. Used phased modeling principles to establish the physical properties model of the study area (porosity, permeability and oil saturation), provide a theoretical basis for the next adjustment of the development program.