The Research Of Remaining Oildistribution Lawin The Western Of Sabei Ⅲ Block

The formation dip of research area, which locates at the west of Saertu oilfield northernanticline structure of Daqing placanticline, is2°to3°, and the average elevation is about150m.The block develops fewer faults and the structure is more gently than usual one. The oilreservoir of three sets of formation, which are Sa Pu Gao, had experienced three developmentadjustment and entered ultra-high water cut stage, then heterogeneity of reservoir enhanced,complexity increased remarkably. The condition of underground sand bodies of the studyregion and the distribution and moving rules of oil-gas-water are already very complex. Whatis more, there are large area of water in reservoir plane, remaining oil distributes dispersive.So analysis becomes difficult, development contradictions and difficulties increasinglyprominent.Fine geologic data was used, through the study of sedimentary facies and faciesdistribution in study area, to determine the development of the sedimentary micro-facies types,the differences of reservoir structure and the main influence of remaining oil formation in thestudy area, so that oil and gas distribution rules can be analysed. By using the study ofsedimentary facies, reservoir geological model and the application model of three-dimensional structure,micro-facies, facies control attributes of pilot site can be established to describe reservoircharacteristics fine, which can provide the basis for reservoir numerical simulation. Theproduction process of oil reservoir and oil-water distribution rule in different periods can bereproduced by means of reservoir numerical simulation and analysis results. Combinedynamic and static data to express the distribution of remaining oil rule qualitatively andquantitatively so that the remaining oil development potential becomes clear.Specifically, the author of this paper has used three-dimensional geological modeling,established structure model, sedimentary facies model, permeability model, porosity modeland original water saturation model of96layers of the10th group in the southeast block ofthe western of Bei Ⅲ area to carry out reservoir numerical simul ation. By means of thecombination of facies control geological modeling techniques and dynamic analysis makes allWells and single well history fitting in study area come true. Then that makes forecast thedevelopment indexes possible. Based on remaining oil saturation field modeling and movableremaining oil reserves abundance field modeling to analyse remaining oil distribution of eachoil layer group and determine remaining oil enrichment region. Finally, remaining oildistribution law can be acquired.