Wz 11-4n Oilfield Eocene Fine Description Of The Liushagang Period Of Reservoir

Introducing the mature reservoir description technology into the early time stage of the newly oil-gas exploration area,in view of the reservoir's geological character and the test results of WZ11-4N,applying various kinds of exploration and development materials,taking discipline theories of the petroleum geology,modern sedimentology,reservoir geology,development geology,reservoir engineering and so on as guidance,,making use of modern reservoir description technologies of high resolution sequence stratigraphy,high resolution seismic stratigraphy,three-dimensional geologic model building,numerical reservoir simulation and so on,and taking the computer technology as method,this thesis conducts a fine description research of the L1 member of WZ11-4N and proposes the corresponding reasonable development.Based on the analysis of the hollow structural formation and evolution in the southwest WeiZhou island,making use of materials of 3D seismics,well drilling and so on,this thesis conducts a fine description of the reservoir of Liul member in this area,establishes three-dimensional fine structural model and structural map to the various subzones,and clarifies the distributed character of the structure in this area and the growth distributed rule of the fault step by step.Based on the previous researches,through observation of the core and analysis of depositional setting and the deposition character,the present research studies the the sedimentary microfacies of the reservoir and holds that this area was mainly the fan delta facies belt and that the microfacies are mainly braided channel facies,channel flank facies,branch channel facies,proximal frontal sands,distal frontal sands and so on.Utilizing the principle and the method of high resolution sequence stratigraphy,the present research establishes the sequence formation skeleton in research area.Based on the contrasting of the skeleton section,the present research divides Liul member into 6 short-term basal level cycles and 8 subzones,which lays a foundation for the fine description of reservoir. This thesis analyzes the diagenesis and conducts the appraisal analytical study of this area reservoir by making use of many kinds of methods such as the core observation,the thin slice,the granularity,the convention natural and so on.The compaction function and the cementation greatly influence the reservoir's accumulation performance;the corrosion function has contributed greatly to the reservoir porosity;the alteration function of detrital minerals such as mica strengthens the anisotropism, makes the pore structure complex and reduces the accumulation performance.Applying the methods of the deposition,the well logging and the earthquake inversion,the present research establishes subzone attribute deterministic model;after establishing the reservoir prototype model,by choosing the optimal random simulations method,the random simulations of the reservoir has been carried and the reservoir forecast model has been established and the numerical reservoir simulation has been carried.This thesis proposes the reasonable development plans which includes formation division,well pattern,well spacing,the development way and the timing of water injectionas as well as the water injection rate,which is significant as a guidance for the reservoir development,stable production and recovery enhancement and serves as reference to the similar reservoir as well.