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• W2052648045 abstract "Abstract A major challenge in reservoir property modelling is integrating the resolution obtained in well logs and the lateral reach of seismic data to obtain a representative model. The seismic data and well logs are recorded as independent pieces of data, each giving subsurface information with different attributes. Recently, solutions to this challenge have emerged in a number of ways. In this case study, implementation was based on a Stochastic Simulation procedure that populated the inter well space with reservoir properties directly linked to 3D seismic and well data. Basic construction principles were geostatistical, though different from conventional geostatistical practices in the sense that in addition to honouring the available well log data, the simulation was conditioned to fully honour the existing seismic data between the wells. Converting petrophysical properties into acoustic properties that are related to seismic attributes required detailed univariate and multivariate analysis of reservoir properties and acoustic impedance relationships and geostatistical analysis of rock properties at the well log scale. This approach provided the petrophysical properties in the inter well volume from the absolute acoustic impedance volume. The acoustic impedance volume was derived from geostatistical inversion of the 3D seismic volume and using the vertically detailed impedance realisations as secondary data, and the well porosity as hard data a sequential Gaussian cosimulation was carried out for generation of the porosity models. 3D permeability model was also built from the mean porosity cube utilizing a regression equation The case study demonstrates the robustness of this approach. A lateral prediction of petrophysical properties was carried out for the reservoir sands in two Niger Delta fields and the resulting acoustic impedance cube and property cube were used to constrain the reservoir static model. These fields have highly stratified clastic reservoirs. The fields structural style consists of complexly faulted collapse crest roll over anticline. 3D porosity and permeability model were built, the seismic constrained property models using geostatistical inversion captured distinctively the heterogeneity and small scale variations in the interwell region." @default.
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• W2052648045 date "2004-08-02" @default.
• W2052648045 modified "2023-10-16" @default.
• W2052648045 title "A Case Application of Geostatistical Inversion of 3D Seismic and Well Data for Enhanced 3D Reservoir Property Modelling" @default.
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• W2052648045 doi "https://doi.org/10.2118/88929-ms" @default.
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