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Method for automatically extracting picture type logging curve data

A logging curve and automatic extraction technology, applied in data processing applications, complex mathematical operations, instruments, etc., can solve problems such as unreliable data, achieve the effects of improving measurement efficiency, meeting data needs, and improving accuracy

Active Publication Date: 2019-10-15
南京东智智能科技有限公司
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Problems solved by technology

[0004] The purpose of this invention is to provide a kind of picture type well logging curve data automatic extraction method, this a kind of picture type well logging curve data automatic extraction method is used to solve modern well logging needs every point data on every well logging curve, and artificial Identify the problem that picture-type logging curves can only provide a small amount of data and the data provided are unreliable

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  • Method for automatically extracting picture type logging curve data
  • Method for automatically extracting picture type logging curve data
  • Method for automatically extracting picture type logging curve data

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Embodiment Construction

[0045] Below in conjunction with accompanying drawing, the present invention will be further described:

[0046] combine Figure 1-Figure 4 The method for automatically extracting picture-type well log data uses image processing technology to extract picture-type well log data, including the following steps:

[0047] 1. Save the well logging curve image in the document, open photoshop, and load the well logging curve picture in photoshop;

[0048] 2. Determine the horizontal and vertical axis range {x of the logging curve in the image min ≤x≤x max ,y min ≤y≤y max}, extract the coordinates XP of the endpoint coordinates of the logging curve coordinate axis in the image min (x u1 ,y u1 ), XP max (x u2 ,y u2 ), YP min (x v1 ,y v1 ), YP max (x v2 ,y v2 ).

[0049] 3. Calculate the rotation angle of the coordinate axis of the logging curve in the picture relative to the coordinate axis of the current photoshop coordinate system window according to the extracted end...

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Abstract

The invention relates to a method for automatically extracting picture type logging curve data. The method comprises the following steps of: 1, loading a logging curve image into photoshop; 2, determining a logging curve actual coordinate range in the logging curve image; 3, performing angle correction on the logging curve image; 4, sequentially extracting logging curve data points from small to large along the abscissa in the image; 5, performing abnormal value identification and correction on the currently extracted logging curve data points by adopting a grey system theory, removing abnormal values and correcting the abnormal values; 6, calibrating the removed data, and mapping the data to an actual logging curve coordinate system from a current window coordinate system; and 7, performing cubic B-spline fitting on the logging data after coordinate conversion to obtain an actual logging curve fitting function so as to obtain smooth data. According to the invention, the measurement efficiency is improved, and the measurement value of each point on each curve can be provided.

Description

Technical field: [0001] The invention relates to a technique for obtaining well logging curves in the field of petroleum engineering and measurement, and a technique for measuring the phase holdup ratio of oil and water in an oil well shaft, and specifically relates to a method for automatically extracting picture-type well logging curve data. Background technique: [0002] Well logging curve is a common carrier for recording logging information in the process of oilfield exploration and production, and it is of great significance to guide oilfield development. In order to understand the current downhole production environment and formation status, researchers need to extract logging data from relevant logging curves for observation and quantitative analysis to draw conclusions. Due to the large number of measured parameters, various instruments of multiple companies are involved in the logging process, and the logging data is often given in the form of curves in the picture...

Claims

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Application Information

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IPC IPC(8): G06F17/17G06F17/16G06Q50/02
CPCG06F17/16G06F17/17G06Q50/02
Inventor 韩连福丛垚付长凤刘超刘兴斌胡实
Owner 南京东智智能科技有限公司
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