The theoretical and practical analysis of reservoir thickness and oil-bearing information of thin reservoirs is performed by using seismic attributes and forward modelling. The results show that thin reservoir can be ...The theoretical and practical analysis of reservoir thickness and oil-bearing information of thin reservoirs is performed by using seismic attributes and forward modelling. The results show that thin reservoir can be recognized using seismic attributes technique when its thickness is less than 1/4 of wavelength. Through analyzing the influence of tuning effect, the relationship between thin layer thickness and tuning amplitude is well revealed. A precise structure interpretation is conducted using relative amplitude preserved high-resolution seismic data. By taking the geologic condition and well data into account, the distribution of oil and gas of HD4 oilfield is analyzed and predicted. based on seismic attributes. The result is helpful to promote the exploration and development in this oilfield.展开更多
In numerical simulations of complex flows with discontinuities,it is necessary to use nonlinear schemes.The spectrum of the scheme used has a significant impact on the resolution and stability of the computation.Based...In numerical simulations of complex flows with discontinuities,it is necessary to use nonlinear schemes.The spectrum of the scheme used has a significant impact on the resolution and stability of the computation.Based on the approximate dispersion relation method,we combine the corresponding spectral property with the dispersion relation preservation proposed by De and Eswaran(J Comput Phys 218:398-416,2006)and propose a quasi-linear dispersion relation preservation(QL-GRP)analysis method,through which the group velocity of the nonlinear scheme can be determined.In particular,we derive the group velocity property when a high-order Runge-Kutta scheme is used and compare the performance of different time schemes with QL-GRP.The rationality of the QL-GRP method is verified by a numerical simulation and the discrete Fourier transform method.To further evaluate the performance of a nonlinear scheme in finding the group velocity,new hyperbolic equations are designed.The validity of QL-GRP and the group velocity preservation of several schemes are investigated using two examples of the equation for one-dimensional wave propagation and the new hyperbolic equations.The results show that the QL-GRP method integrated with high-order time schemes can determine the group velocity for nonlinear schemes and evaluate their performance reasonably and efficiently.展开更多
文摘The theoretical and practical analysis of reservoir thickness and oil-bearing information of thin reservoirs is performed by using seismic attributes and forward modelling. The results show that thin reservoir can be recognized using seismic attributes technique when its thickness is less than 1/4 of wavelength. Through analyzing the influence of tuning effect, the relationship between thin layer thickness and tuning amplitude is well revealed. A precise structure interpretation is conducted using relative amplitude preserved high-resolution seismic data. By taking the geologic condition and well data into account, the distribution of oil and gas of HD4 oilfield is analyzed and predicted. based on seismic attributes. The result is helpful to promote the exploration and development in this oilfield.
基金National Numerical Wind-tunnel Project of China under grant number NNW2019ZT4-B12.
文摘In numerical simulations of complex flows with discontinuities,it is necessary to use nonlinear schemes.The spectrum of the scheme used has a significant impact on the resolution and stability of the computation.Based on the approximate dispersion relation method,we combine the corresponding spectral property with the dispersion relation preservation proposed by De and Eswaran(J Comput Phys 218:398-416,2006)and propose a quasi-linear dispersion relation preservation(QL-GRP)analysis method,through which the group velocity of the nonlinear scheme can be determined.In particular,we derive the group velocity property when a high-order Runge-Kutta scheme is used and compare the performance of different time schemes with QL-GRP.The rationality of the QL-GRP method is verified by a numerical simulation and the discrete Fourier transform method.To further evaluate the performance of a nonlinear scheme in finding the group velocity,new hyperbolic equations are designed.The validity of QL-GRP and the group velocity preservation of several schemes are investigated using two examples of the equation for one-dimensional wave propagation and the new hyperbolic equations.The results show that the QL-GRP method integrated with high-order time schemes can determine the group velocity for nonlinear schemes and evaluate their performance reasonably and efficiently.
