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A denoising method and device for time-shifted gravity increment

A gravitational and incremental technology, applied in the field of oil exploration, which can solve problems such as data connection that cannot be considered

Active Publication Date: 2018-02-02
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology

[0006] Embodiments of the present invention provide a denoising method and device for time-shifted gravity increments to solve the problem that time-shifted microgravity cannot be considered when conventional denoising processing methods are used to denoise time-shifted gravity data in the prior art. The problem of linking data from multiple observations to data from multiple readings from a single observation

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Embodiment Construction

[0026] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with the embodiments and accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.

[0027] Aiming at the problems that arise when the conventional denoising processing method is used to denoise the time-shifted gravity data, the inventor proposes a time-shifted gravity increment de-noising method to solve the problem of using the upward continuation de-noising processing method And when the denoising processing method of low-pass filtering is used for denoising processing, the problem of the connection between the data obtained by performing time-shifted microgravity multiple observations and the data obtained by single observation and multiple readings is not considered. Spec...

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Abstract

The invention provides a de-noising method and device for a time shifting gravity increment. The method comprises the step of weighting the gravity variances of all work area measured points measured multiple times within a first time period and the gravity variances and time shifting gravity increments measured multiple times within a second time period to obtain a de-noised time shifting gravity increment of the current measured point. By adopting the weighting method, the problem that the relation between the data obtained by observing time shifting microgravity multiple times and the data obtained by single observation and multiple readings is not considered during de-noising in the prior art is effectively solved, and the observation error of the time shifting gravity increment, namely observation noise, is removed, so that the goodness of fit between the finally obtained data and the practical geologic status is higher.

Description

technical field [0001] The invention relates to the technical field of petroleum exploration, in particular to a method and device for denoising time-shifted gravity increments. Background technique [0002] During the oil and gas production process, the underground oil and gas substances will be redistributed, resulting in local changes in the underground gravity field. The measurement of changes in the subsurface gravity field is called time-lapse microgravity measurement, and the data obtained by repeated measurements of local changes in the earth's microgravity field are called time-lapse microgravity data. Therefore, when performing time-shifted microgravity measurements, it is necessary to make multiple observations of the same work area, and to make multiple observations and multiple readings of the same measuring point, so that all the measuring points in the work area have time-shifted microgravity increments. [0003] At present, the methods for denoising processi...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V7/06
CPCG01V7/06
Inventor 刘云祥赵文举郑胜贤
Owner BC P INC CHINA NAT PETROLEUM CORP
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