Envelope surface construction method based on geological prototype model

Abstract

The invention discloses an envelope surface construction method based on a geological prototype model. The method comprises the following specific steps: performing geometric characteristic parameteranalysis on configuration units of different deposition types and different levels; optimizing main characteristic parameters, constructing a geological prototype model by utilizing a modeling algorithm; drawing a configuration unit plane enveloping surface distribution range in a well-to-seismic combination manner on the basis of establishment of a geological prototype model, then generating a three-dimensional enveloping surface under constraint of the geological prototype model, and finally performing boundary modification on the three-dimensional enveloping surface in combination with wellpoint configuration interpretation and geological cognition to obtain a final three-dimensional enveloping surface. The invention provides an envelope surface construction method based on a geological prototype model. Based on sparse spatial discrete data, three-dimensional forms of all levels of sub-configuration units are directly reconstructed in an enveloping surface form under the constraintof a geological prototype model, so that the model better conforms to the real form of a geologic body, and the industry problem of small-scale interface three-dimensional space representation in reservoir configuration research is solved.

Description

technical field [0001] The invention relates to a method for constructing an envelope surface based on a geological prototype model. Background technique [0002] As more and more oilfields enter the stage of high water cut development, the requirements for quantitative characterization of reservoirs are getting higher and higher. Into the model is the current research difficulty. At present, conventional modeling methods, whether stochastic modeling or deterministic modeling, are all based on grids to perform three-dimensional representation of geological bodies. Since the grid size cannot be set too small, it is inevitable that in the geological model Some fine geological understanding is lost. There are two shortcomings in this modeling method. One is that it is difficult to characterize small-scale geological bodies and the interfaces between them. The other is that it cannot accurately characterize the geometry of sand bodies and their overlapping and cutting relation...

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Problems solved by technology

[0004] In order to solve the problems existing in the prior art, the present invention proposes an envelope surface construction method based on a geological prototype model to solve the problem that the conventional modeling method in the prior art cannot accurately reflect small-scale seepage barriers, and the distribution of remaining oil The problem of low prediction accuracy

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