The Study On Architecture Of Delta-front Facies And Simulation Experiment Of Remaining Oil Distribution

The Hutubihe Formation K₁h₂ reservoir in LU 9 wellblock of Luliang Oilfield has strong anisotropism and large difference of reservoir physical property,and its reservoirs are low natural energy.In the process of waterflooding,the situation of water driving and the remaining oil distribution are unclear,which seriously affect the follow-up development of the Hutubihe Formation K₁h₂ reservoir in LU 9 wellblock.In this paper,with the comprehensive utilization of core,well logging and production data,the research of sedimentary facies and reservoir architecture and simulated water flooding experiment are carried out,and the following results and knowledge have been achieved.On the basis of isochronous stratigraphic frameworks and facies marks,achieve the division of sedimentary microfacies and specify the planar and section distribution characters of sedimentary microfacies,then fest up reservoir sedimentary facies model of study area.On the basis of the sedimentary facies study,the study on reservoir architecture is carried out.Classify petrographic facies types and analyze architectural element features of different lithofacies associations and different vertical and lateral contacting approches of different architectural elements.A set of reservoir architecture interface division scheme is established for the study area and the main interfaces are identified and described.Select representative mouth bar reservoir then quantitatively dissect grade by grade.Identify different single debouch bar within the composite mouth bar and different accretion sand bodies of the inner single debouch bar,then quantitatively describe each interface.Design the mouth bar model to carry out water flooding experiment and analyze the remaining oil distribution after water flooding.Through the experiment to observe phenomena and record data,according to the recorded experimental phenomena and all the electrical resistance data changing by time-varying,and combine with the reservoir architecture in study area to analyze the impact factors on remaining oil distribution.