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2nd Latin American Geosciences Student Conference (LAGSC)
- Conference date: 04 Aug 2014 - 07 Aug 2014
- Location: Mexico City, Mexico
- Published: 04 August 2014
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Modeling Static of Petrophysical Properties with Well Loggin Analysis and Geostatistics
More LessThe description of the distribution of porosity in a reservoir is a very important aspect on reservoir engineer. It has a direct impact on economic decisions in the exploration and production projects. A statistical technique developed to apply to the problems of Earth Sciences is the Geostatistics. This technique study the spatial continuity of the attributes of a reservoir, in order to provide characterizations of heterogeneous reservoirs, using many estimation methods. With the information obtained from the petrophysical evaluation, a litho-correlation of the well with the interested zone. Making a model 3-D using geostatistical techniques Variography, estimate and simulation of each of the petrophysical properties from the evaluation of the well logging. In this paper make a methodology for static modeling of reservoir from well loggings. It is noteworthy that as the specialized software (Techlog, Petrel and SGeMS) . The first of the petrophysical evaluation, the second of correlation with seismic data and last for geostatistics method. With all that bucket each petrophysical property is obtained. The results collectively contribute to the quantification of the reservation.
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First-break tomography parametrization for near-surface velocity modelling
Authors J.M.V.B. Vazquez-Barrios and L.F. FreitasThe on-shore south side of Mexico presents complex surface and subsurface geological structures due to Laramide orogeny (Ks - Eo). Must of this are folded limestones which contrast with earlier sediments deposited next to them. This creates strong lateral velocity contrasts in the near-surface. Therefore velocity nature modeling is a complex task to achieve. In this paper the analysis of how decisive parameters (e.g. cell size, and model depth) help to define the tomographic inversion as an appropriate tool for near-surface velocity model building are discussed. Unlike to other publications (Zhu et al., 2008) that consider the use of the estimated near-surface velocity model to compuet static corrections as the tool which defines the reliability of the model, the accuracy of the model is verified by the misfit between observed and estimated arrival-times, and near-surface anomalies distribution.
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