Research On Reservoir Model-building And Development Adjustment Scheme Of Duanliubo Oilfield

Duanliubo oilfield of Dagang area is typical of low permeability reservoir. The average permeability of reservoir is 31.3×10-3μm2,and the average porosity is 15.9%, which belong to the medium porosity and low permeability reservoir. In order to resolve the main problems existing in the development of Duanliubo oilfield, improve development results, and enhance oil recovery, in this paper, inner structures of reservoirs are anatomized, oil-gas distribution patterns are reveled, and reservoir fine geological, petrophysical, diagenetic, tectonic, flowing, and engineering models which can describe oil-gas distribution status and flow characteristic are built by taking reservoir development theories as a guide, using deterministic and stochastic model-building techniques,utilizing quality controlling and grid coarsening,and maximally applying computer tools.Comprehensive researches of reservoir engineering are carried out from well network, layers series adaptability, develop mode, technique adaptability etc.Re-recognize structure and reservoir finely,and to resolve the serious problems of water cut icreasing and accelerating ect which caused by interlayer interference because of exploiting for years efficiently.In order to widen replacement of reserves to deploy production well,based on sedimentary micro-facies and reservoir,studies on reservoir numerical simulation to analysis main control factors of remaining oil and find out recoverable reserves distribution patterns of plane and then comprehensive evaluation of development results are conducted.At the same time comprehensive evaluation researches of single sand layers in reasonable well spacing density and production of potential are performed, integrated adjustment scheme of combination of new wells and old wells are complied in order to make a scientific basis to management and enhance ultimate recovery of Duanliubo oilfield.