The Application Of Reservoir Modeling Technology Under 3D Constraint Of Seismic Inversion In HC Oilfield Of Xinjiang

This subject takes HC oilfield in Xinjiang as the research area.At the top,the Upper Wuer river group formation of the Permian is overlaps on the nose-shaped uplift,and it is an angular unconformable contact with the underlying Permian Jiamu river group formation.This area is missing the Fengcheng Formation,Xiazijie formation and the Lower Wuer river Formation.The structure in southeast is low and the structure in northwest is high,because of the uplift area was further uplifted by the Yanshan movement,the final tectonic shape was determined by the Himalayan movement.In early of the Lower Wuer river Formation,a large set of conglomerates is developed.In late of the Lower Wuer river formation,the Thin interbedded deposits of conglomerate and mudstone.It is proved that,the lower the production zone is high Vsh valule,the conglomerate is batter.The reservoir is thin and the reservoir heterogeneity is high,also the wells of this field is is low level.The seismic inversion method is effective to predict reservoir distribution characteristics,but the conventional inversion techniques such as post-stack deterministic inversion technique and pre-stack deterministic inversion,the vertical resolution of the seismic resolution limit is difficult to predict the thin reservoir.Therefore,it is necessary to carry out high-resolution reservoir prediction.In this research,the pre-stack high-resolution statistical inversion technology had been used to predict thin reservoir.Useing 3D Geo-model to describe the geological characteristics of the reservoir and provide reliable data to dynamic simulation is necessary.The conventional modeling method is random simulation,but due to the low well controlling in this area,the conventional modeling method is useless.Therefore,it is necessary to use seismic inversion data as a 3D trend data for Geomodeling.This research focuses on using inversion result as 3D trend to build geo-model,so that to simulate more accurately characteristics of reservoir distribution,and increase the predictability of the model.Provide dynamic simulation with reliable model.Realizing the effective combination of seismic inversion and geological modeling.In this subject,using NML data to improve the accuracy of Rockphysics and Petrophysics study.On this basis,the gathers optimization work and velocity spectrum optimization work had been implemented to improve data quality.Finally,use the inversion data as a 3D soft trend to control the lithofacies modeling and porosity modeling.Get the following understanding:1.The NML data improve the quality of well log explaining,and provide reliable data support for petrophysical modeling.2.The pre-stack geostatistical inversion is effectively improving the prediction accuracy,the thin reservoir is effectively predicted3.Useing inversion data as 3D trends to control Geo-modeling method is an effective measure to simulate thin reservoir.