3d Seismic Reservoir Rediction And Oil-bearing Analysis Based On Elastic Impedance Inversion

With the development of oilfield exploration and development in the study area,Higher requirements have been put forward for the accuracy of reservoir prediction,and the conventional post-stack inversion can no longer meet the requirements of physical property and oil-bearing prediction.Meanwhile HH92 wellblock is currently the focus of the HH oilfield development zone,by HH92 wellblock as the target area,chang 81,for the purpose,to carry out 3 d seismic prestack potentiality of reservoir prediction and detection technology research,effective reservoir prediction purpose layer distribution and oil enrichment zone,eventually formed a set of suitable for the characteristics of Mesozoic reservoirs in HH oil field prestack reservoir prediction and oiliness prediction technology series,to provide technical support to HH oilfield petroleum exploration and development.Through the in-depth study of this project,also made a series of results and understanding.On the one hand,it is realized that the study area is disturbed by multiple waves formed by thick loess,complex topography and coal seam,resulting in poor seismic quality.On the other hand,by improving the quality of the data,a set of optimized processing process is summarized,which mainly improves the fidelity and wide Angle information.In terms of petrophysical analysis,pre-stack elastic parameter Vp/Vs is the most sensitive to oil content.In terms of reservoir prediction,this project innovatively uses the sedimentary facies boundary control inversion to organically apply the sedimentary information in the inversion to predict favorable sand bodies within the range of sandstone and reduce the target.In the aspect of physical property prediction,the seismic physical phase technique is adopted.The physical phase obtained by coordinate rotation using the ray impedance data is used to predict the distribution range of high-quality reservoirs quantitatively.Under the control of seismic phase,the predicted porosity and oil-bearing properties are in good agreement with those of drilling.