The Study Of Jilin Oilfield Block Da Fine Reservoir Description And Reservoir Conditions

Jilin oilfield taean block after many years of water flooding development, at present has entered high water cut stage, difficult mining, comprehensive water cut is high, the problem such as low recovery efficiency, therefore, in to digestion and absorption of predecessors’research achievements of rich, analysis of defects, combined from different stages of geological, well logging, the static and dynamic data, such as the production, the factory area of reservoir sedimentary microfacies and reservoir characteristics, tectonic evolution, sedimentary characteristics, such as make a fine description, reservoir using quantitative, analysis of remaining oil distribution, through continuous adjustment and management, to maintain efficient production of oil field, provide reliable geological basis for oilfield development in the next step.Taean, the research purpose of this paper is aimed at jilin oilfield blocks after years of exploration and development of the various production contradiction, revealed by the predecessors’ research achievements of rich for digestion, absorption, distribution, analysis of defects, combined from different stages of geological, well logging, the static and dynamic data, such as the production, the factory area of reservoir sedimentary microfacies and reservoir characteristics, tectonic evolution, sedimentary characteristics, such as make a fine description, using the existing computer software and hardware technology,3 d geological model is established and reservoir engineering research, finally the quantitative study of remaining oil distribution of oilfield development for the next step, increasing efficiency to provide reliable geological basis.This paper according to the abundant core data, logging data, dynamically generated data, such as sedimentary petrology, sequence stratigraphy theory as the instruction, based on the predecessors’research achievements of rich, use cycle, such as thickness, height method and other methods such as technology, adopts "slices" comparison research method, all well within the work area for fine stratigraphic correlation and division of work, set up the whole work area of isochronous stratigraphic framework, implements the whole closed isochronous contrast.In establishing a fine stratigraphic correlation and classification, on the basis of unit by small layers to study the sedimentary study of sedimentary microfacies of reservoir sand body, starting from the core data analysis in the study area, comprehensive variety of logging and production data, by analyzing the sedimentary evolution, sedimentary environment, etc., the difference of the combining previous research results, establish for river delta sedimentary system in the study area, consensus don’t make front delta facies, delta front subfacies, distributary plain facies sedimentary microfacies, debouch bar, underwater distributary channel microfacies, sheet sand microfacies, distributary channel micro equal between 11 microfacies types. Established sedimentation model in the study area, the study provided the basis for subsequent residual oil distribution.production performance data, analysis of reservoir characteristics in the study area, the results of the study think work area sand body horizontal longitudinal change quickly, poor continuity, physical distribution is relatively fragmented, and due to the effect of spacer of the impervious bed, vertical different physical property features small also have bigger difference, the sedimentary reservoirs in the study area with strong heterogeneity, the distribution of property is a ribbon, mainly by sedimentary microfacies belt control effect, generally speaking, the distributary channel better properties, high permeability, and sand sheet, interchannel poor physical properties, pore permeability is low, development is difficult.Sedimentary microfacies study, based on the previous do fine stratigraphic correlation and classification and evaluation of the reservoir characteristics, using 3 d geologic modeling software Petrel reservoir 3 d geological modeling in the studied area, according to the research data collection, analysis of well spacing density, etc., adopt the way of combining the deterministic model and stochastic modeling, which accurately depict the sand body structure form, but also to simulate the movement of unknown underground reservoir prediction, consistent with the geological research results, and remaining oil research provides the geological basis for the follow-up.Comprehensive reservoir engineering study, reservoir reserves producing situation analysis in the studied area, the water drive reserves control refers to the development between cell injection Wells and oil Wells connected sand body reserves, its use degree is an important index for reflect the status of water flooding, through analyzing their understanding, mastery of remaining oil distribution, think of remaining oil distribution is mainly controlled by sedimentary microfacies, in the main channel microfacies, reservoir reserves is higher, but recovery degree is high, and in the interchannel, sheet sand microfacies, such as reserves is low, less workability, main development well pattern control degree is high, the eastern fault block, low degree of well control in southeast, reserves is not implemented, has great potential rolling and the basis of the overall adjustments. Local injection-production well spacing is imperfect, imperfect perforation, interlayer large difference of reserves producing degree, plane wellblock of large difference of reserves producing, with perfect injection-production relationship potential.