Determination method of formation thickness
A determination method and formation technology, which is applied in the field of formation thickness determination, and can solve the problem of large error in formation thickness determination method.
Active Publication Date: 2019-09-03
PETROCHINA CO LTD
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[0007] The main purpose of the present invention is to provide a method for determining the thickness of the formation to solve the problem of large errors in the determination method of the thickness of the formation in the prior art
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[0045] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.
[0046] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinations thereof.
[0047] It should be noted that the terms "first" and "second" in the description and claims of the present application and the above drawings are used to distinguish simila...
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The invention provides a formation thickness determining method which includes the steps: performing planar fitting on original data points to obtain a formation fitting plane; meshing the formation fitting plane by interpolation fitting to obtain a formation mesh fitting plane; determining absolute difference of a first interpolation corresponding to the original data points according to the original data points and the formation mesh fitting plane, processing the original data points with the absolute difference positioned outside a confidence interval, and performing interpolation calculation again; determining the normal vector of sections of the points positioned at mesh line intersections on the formation mesh fitting plane by a bi-cubic fitting difference method; acquiring a time threshold between a top interface and a bottom interface of a formation according to the normal vector; determining the real thickness of the formation according to the time threshold and the propagation speed of elastic waves in the formation. By the method, the real thickness of the formation can be directly and accurately determined by seismic data, and formation deposition can be more accurately qualitatively and quantitatively analyzed.
Description
technical field [0001] The invention relates to the field of geological exploration, in particular to a method for determining the thickness of a formation. Background technique [0002] After more than half a century of development in the petroleum industry, its exploration and development goals have become more and more complex, and the field of lithologic oil and gas reservoir exploration has become more and more popular. In stratigraphic sediment analysis technology, the restoration of ancient geomorphology has increased accordingly. One of the key The link is to obtain the stratum thickness. [0003] The calculation of formation thickness under the existing technical conditions has the following limitations: [0004] (1) The stratum thickness is obtained based on the depth interface of the top and bottom of the structure based on the seismic interpretation results. The top and bottom interface of the structure is smoothed after interpolation calculation, and the obtain...
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IPC IPC(8): G01V1/30
Inventor 杨彤远吴海生何文军郑孟林杨翼波
Owner PETROCHINA CO LTD