Research Of Geology Modeling In Reservoir Of Lower Es₃ Sub-section In Zhuang 66 Fault Block Of Wuhaozhuang Oil Field

Oil Group I of the Lower Es3 Reservoir in Zhuang 66 Fault Block of Wuhaozhuang oil field is a structural-lithologic reservoir,which has been in the ultra-high water cut stage.Through the analysis of the dynamic and static data of the reservoir,some problems are revealed such as interlayer distinct differences,imbalanced degree of reserve recovery,low single well productivity,low oil recovery rate,large quantities of non-production and water-injection halted wells,long time of the well shutting,low injection-to-production well corresponding ratio and extremely uncompleted injection recovery,which increase the difficulty of the development of reservoir of Zhuang 66 fault block.In order to solve these problems,geological modeling of reservoir has been constructed to complete numerical simulation and to research the distribution of remaining oil,providing foundation to enhance recovery.In order to accurately describe the sedimentary facies and property distribution,on the basis of accurate geological research,the geological models are constructed based on single sandbody.Utilize fine structural interpretation and combination of wells and seismic to depict structural map which serves for structural framework to establish an accurate model.On the basis of the geological structure model,use the method of deterministic modeling to build the sedimentary microfacies model in according to the previous research of lake gravity flow turbidite fan sedimentary system.And then,combining with the logging secondary interpretation results,according to the distribution feature of the porosity of each reservoir,and using the sedimentary microfacies model as control,build the porosity model utilizing the sequential gaussian simulation algorithm.As a constraint,build the permeability model utilizing sequential gaussian simulation algorithm with a collaborative simulation.After building the 3D geological model of the reservoir,test the models through probability distribution uniformity and reservoir numerical simulation.In the test of probability distribution uniformity,the probability distribution the simulation values of porosity and permeability,the upscaled values and the values of original log interpretation data tend to be consistent.And in the test of reservoir numerical simulation,simulated the indicator of the whole district and the single wells.Both of results are in keeping with the actual value.The tests indicated that the precision of the model built in this research is appropriate.