... sulfides (pyrite, sphalerite, and galena) and physical properties such as conductivity, resistivity, magnetic susceptibility, P-wave velocity, and density. There are three main stages of hydrothermal alteration in the process of mineralization. The first one is a brecciation stage that forms a breccia...

... algorithm applied geoscience & energy 10 time-lapse seismic joint inversion inversion result p-wave velocity exploration geophysicist Time-lapse seismic Joint inversion based on Zoeppritz equation in depth domain Wenjin Li*, Jingye Li Lei Han, Zhen Liao, China University of Petroleum (Beijing...

... The sensitivity of surface wave dispersion to different parameters is vary greatly, the S-wave velocity can be inverted, but the P-wave velocity cannot be obtained directly. In engineering and petroleum exploration, the application of P-wave velocity is more significant. It is shown that Poisson...

...-wave velocity geological subdiscipline anisotropic time-lapse fwi geophysics anisotropic model vertical p-wave velocity sleipner field equation acoustic anisotropic time-lapse full-waveform inversion co 2 applied geoscience & energy 10 seismic data exploration geophysicist...

... sandstone exploration geophysicist 10 p-wave velocity upstream oil & gas bisq model tight sandstone stiff pore frequency characteristic squirt flow length geophysics experimental data A study on squirt-flow theoretical models in saturated rocks Chunfang Wu1, Jing Ba1*, Lin Zhang1...

... source receiver pair pressure component velocity inversion kernel fresnel zone saudi arabia government receiver pair surface complexity amplitude reservoir characterization traveltime kernel applied geoscience wavefield exploration geophysicist 10 p-wave velocity Impacts of near surface...

..., although slightly, to take reflectivity coefficient series with the Ricker wavelet of appropriate mini-steps towards the end of learning. The central frequency of 27 Hz. Only P-wave velocities were estimated during the seismic inversion, and the densities of the rocks were assumed constant throughout...

... layers and estimate their P-wave velocities. layers cause serious problems for seismic reflection imaging of deeper structures. Seismic refraction and uphole logging surveys are carried out to map the near-surface layers and generate a velocity model. Static corrections are computed from this velocity...

.... Synthetic tests on a portion of the Sigsbee2A P-wave velocity and density models show that multi-parameter CNNRFWI can invert for the P-wave velocity and density models more accurately than the corresponding starting models. machine learning deep learning rtm image neural network multi-parameter...

... geophysicist 10 slowness p-wave velocity Ultra-low frequency AVA analysis of plane-wave primary reflection seismograms Lasse Amundsen*, Equinor Summary 1991; Dahl and Ursin, 1992; Zhao et al., 1994; Ursin et al., An amplitude versus angle (AVA) method is presented for 2003; Innanen, 2014; and Li et al...

... acoustic velocity model expanded abstract target area artificial intelligence elastic inversion full-waveform inversion seg international exposition upstream oil & gas biondi workflow surface data model extension s-wave velocity estimation fwi process p-wave velocity machine learning...

... Recently, many studies (Rubino et al., 2013; Li et al., 2018) measured the P-wave velocity and attenuation of a partially have reported that the attenuation of rocks can be explained saturated sandstone with varying pressures. After calibrating by the combined effects of the mesoscale and microscale...

... is constructed based on exact Zoeppritz equations by using the Bayesian theory. It not only overcomes the limitations of conventional AVO inversion method based on the approximate expression of Zoeppritz equations, but also has good stability and accuracy. We can obtain the precise P-wave velocity, S-wave...

... parameters (Thomsen, 1986) to The process first converts measured P-wave velocity into the simplify the mathematical formulations and better symmetry axis values using the Thomsen weak vertical accommodate the calculation process. transverse isotropic equation and then performs fluid substitution to remove...

... seg international exposition ambient noise upstream oil & gas seismometer reservoir monitoring system p-wave velocity transfer function co 2 exploration geophysicist 10 velocity variation temporal variation source system reservoir characterization variation Continuous reservoir...

... characterization frequency template deep carbonate reservoir p-wave velocity Temperature, pressure and porosity inversion for deep carbonate reservoirs based on three- dimensional rock physics templates Yijun Wei1, Jing Ba1* 1. School of Earth Sciences and Engineering, Hohai University, Nanjing, 211100...

... areas. Fig.1 shows the is proposed. It contains two major algorithms to discovery six logs of well (black curves), including three elastic the superior reservoir. Firstly, a random forest algorithm parameter curves (P-wave velocity , S-wave velocity , and (RFA) is performed to predict reservoir...

... both EM and acoustic properties are related to the porosity, saturation, and mineral composition of the rock, we develop rock physics templates to predict P-wave velocity (Vp), S-wave velocity (Vs), and permittivity from porosity and saturation. In this work, we first estimate the IF value...

... fluids will cause the frequency band of dispersion occurring in higher frequency. The characteristic frequency band of dispersion is positively correlated with porosity and permeability, and negatively correlated with fluid viscosity. In high frequency band, P-wave velocity increases with the increase...

... porosity resistivity upstream oil & gas artificial intelligence rfa predictor p-wave velocity forest algorithm prediction Baldwin , J. L. , D. N. , Otte , and C. L. , Whealtley , 1989 , Computer emulation of human mental processes: application of neural network...