Geophysical Prospecting
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First‐arrival traveltime tomography with modified total‐variation regularizationABSTRACT First‐arrival traveltime tomography is a robust tool for near‐surface velocity estimation. A common approach to stabilizing the ill‐posed inverse problem is to apply Tikhonov regularization to the inversion. However, the Tikhonov regularization method recovers smooth local structures while blurring the sharp features in the model solution. We present a firs... ... hiện toàn bộ
Geophysical Prospecting - Tập 65 Số 5 - Trang 1138-1154 - 2017
Seismic modelling for reservoir studies: a comparison between convolutional and full‐waveform methods for a deep‐water turbidite sandstone reservoirABSTRACT Two seismic modelling approaches, that is, two‐dimensional pre‐stack elastic finite‐difference and one‐dimensional convolution methods, are compared in a modelling exercise over the fluid‐flow simulation model of a producing deep‐water turbidite sandstone reservoir in the West of Shetland Basin. If the appropriate parameterization for one‐dimensional convol... ... hiện toàn bộ
Geophysical Prospecting - Tập 68 Số 5 - Trang 1540-1553 - 2020
Bayesian inversion of time‐lapse seismic data for the estimation of static reservoir properties and dynamic property changesABSTRACT Seismic conditioning of static reservoir model properties such as porosity and lithology has traditionally been faced as a solution of an inverse problem. Dynamic reservoir model properties have been constrained by time‐lapse seismic data. Here, we propose a methodology to jointly estimate rock properties (such as porosity) and dynamic property changes (suc... ... hiện toàn bộ
Geophysical Prospecting - Tập 63 Số 3 - Trang 637-655 - 2015
Quantitative integration of 3D and 4D seismic impedance into reservoir simulation model updating in the Norne FieldABSTRACT The ultimate goal of reservoir simulation in reservoir surveillance technology is to estimate long‐term production forecasting and to plan development and management of petroleum fields. However, maintaining reliable reservoir models which honour available static and dynamic data, involve inherent risks due to the uncertainties in space and time of the dist... ... hiện toàn bộ
Geophysical Prospecting - Tập 67 Số 1 - Trang 167-187 - 2019
Deep neural network application for 4D seismic inversion to changes in pressure and saturation: Optimizing the use of synthetic training datasetsABSTRACT In this work, we tackle the challenge of quantitative estimation of reservoir dynamic property variations during a period of production, directly from four‐dimensional seismic data in the amplitude domain. We employ a deep neural network to invert four‐dimensional seismic amplitude maps to the simultaneous changes in pressure, water and gas saturations. The... ... hiện toàn bộ
Geophysical Prospecting - Tập 68 Số 7 - Trang 2164-2185 - 2020
Improved normalization of time‐lapse seismic data using normalized root mean square repeatability data to improve automatic production and seismic history matching in the Nelson fieldABSTRACT Updating of reservoir models by history matching of 4D seismic data along with production data gives us a better understanding of changes to the reservoir, reduces risk in forecasting and leads to better management decisions. This process of seismic history matching requires an accurate representation of predicted and observed data so that they can be compa... ... hiện toàn bộ
Geophysical Prospecting - Tập 62 Số 5 - Trang 1009-1027 - 2014
Integration of the life of field seismic data with the reservoir model at the Valhall Field‡ABSTRACT The frequent time‐lapse observations from the life of field seismic system across the Valhall field provide a wealth of information. The responses from the production and injection wells can be observed through time‐shift and amplitude changes. These observations can be compared to modelled synthetic seismic responses from a reservoir simulation model of th... ... hiện toàn bộ
Geophysical Prospecting - Tập 59 Số 4 - Trang 673-681 - 2011
Rapid inversion of data from 2D resistivity surveys with electrode displacementsABSTRACT Resistivity monitoring surveys are used to detect temporal changes in the subsurface using repeated measurements over the same site. The positions of the electrodes are typically measured at the start of the survey program and possibly at occasional later times. In areas with unstable ground, such as landslide‐prone slopes, the positions of the electrodes c... ... hiện toàn bộ
Geophysical Prospecting - Tập 66 Số 3 - Trang 579-594 - 2018
From the Hagedoorn imaging technique to Kirchhoff migration and inversionThe seminal 1954 paper by J.G. Hagedoorn introduced a heuristic for seismic reflector imaging. That heuristic was a construction technique – a ‘string construction’ or ‘ruler and compass’ method – for finding reflectors as an envelope of equal traveltime curves defined by events on a seismic trace. Later, Kirchhoff migration was developed. This method is based on an integral representation... ... hiện toàn bộ
Geophysical Prospecting - Tập 49 Số 6 - Trang 629-643 - 2001
CONTAMINATION INDICATIONS DERIVED FROM ELECTRICAL PROPERTIES IN THE LOW FREQUENCY RANGE1Abstract Electrical measurements are an important and integrated component of geophysical investigations connected with environmental problems. As a result of an analysis of the electrical conductivity, basic experiments on sandstones at frequencies below 10 kHz show that the complex behaviour of conductivity is caused exclusively by a complex int... ... hiện toàn bộ
Geophysical Prospecting - Tập 41 Số 1 - Trang 83-98 - 1993
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