this paper describes a methodology for the integration of well logs and a series of grid-based attributes extracted from interpreted seismic data for prediction of porosity distributions. the studied area is located in the southwest iran. before finding a relationship between the target logs and predicted logs from 3d seismic data, we have interpreted the 3d seismic data in the studied area. al...

Seismic data are considered crucial sources of that help identify the litho-fluid facies distributions in reservoir rocks. However, different mostly have similar responses to seismic attributes. In addition, anisotropy negatively affects predictors extracted from data. Accordingly, this study aims at estimating zero-offset acoustic and shear impedances based on partial-stack inversion by two me...

Abstract Shale gas reservoirs require artificial hydraulic fracturing to achieve commercial production. Continental Jurassic shale have several thin interlayers (e.g. sandstone and carbonate), which lead pseudo-anisotropy of the seismic amplitude velocity, traditional technology for predicting anisotropic fractures has difficulty in identifying a true target. Based on theory azimuthal anisotrop...

A stochastic approach to seismic inversion using the ensemble Kalman filter (EnKF) is proposed. Seismic depth and time image data are used as the input for EnKF stochastic seismic inversion. The sonic log is used to estimate source wavelet and create initial models for the inversion, which provides an efficient integration of sonic log data and seismic data. We use both travel time and waveform...

Two dimensional (2D) numerical simulation of low-frequency (1/f) noise is carried out in N-channel polysilicon thin film transistors biased from weak to strong inversion. Noise is simulated by Generation-Recombination processes. Simulation is based on the impedance field method of Shockley. A 2D analysis of the local noise level shows that contribution at grain boundaries dominates from weak to...

A big challenge in studying organic rich shale is to predict its kerogen content and maturity from indirect observations. Kerogen maturation changes shale texture; for example, it generates microcracks and fractures in the matrix. Assessment of maturity from indirect measurements can be greatly enhanced by exploiting any existing correlations between physical properties, microstructure, and ker...