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A method and system for determining the position of a channel using well logging curves

A technology for logging curves and river channels, which is used in measurement devices, nuclear radiation exploration, geophysical measurement, etc., to achieve the effect of reducing labor costs, clear results, and strong operability

Active Publication Date: 2020-09-08
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, the technologies and methods for determining the channel are mostly qualitative researches on well logging curves, either classifying the shape of well logging curves, or making relative classifications according to the degree of toothing of well logging curves. Quantify the toothing degree of the well curve

Method used

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  • A method and system for determining the position of a channel using well logging curves
  • A method and system for determining the position of a channel using well logging curves
  • A method and system for determining the position of a channel using well logging curves

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Embodiment 1

[0045] In this embodiment, according to the present invention, the method for determining the position of the channel using well logging curves may include:

[0046] Based on the microfacies division of a single well, identify the log curve segment corresponding to the micro-correspondence of the channel, and determine the sawtooth contained in the log curve segment; calculate the average amplitude, distribution density, and distribution frequency of the sawtooth; determine the sawtooth respectively The weight coefficients corresponding to the average amplitude, distribution density, and distribution frequency, and calculate the toothing rate of the logging curve segment based on the average amplitude, distribution density, distribution frequency and the corresponding weight coefficients of the sawtooth; based on the The cog rate determines the location of the channel.

[0047] Integrated geology, well logging, mud logging and other multi-disciplinary joint research, character...

application example 1

[0085] In order to facilitate the understanding of the solutions and effects of the embodiments of the present invention, a specific application example is given below. Those skilled in the art will understand that this example is only for the purpose of facilitating the understanding of the present invention, and any specific details thereof are not intended to limit the present invention in any way.

[0086] Figure 2a , Figure 2b , Figure 2c , Figure 2d and Figure 2e Respectively show the D1, D2, D3, D4, D5 single well logging gamma electrical logging curve histogram according to an embodiment of the present invention, image 3 Shows a comparison chart of D1, D2, D3, D4, D5 single well logging curves in channel microfacies according to an embodiment of the present invention, Figure 4 It shows the distribution diagram of channel microfacies plane according to one embodiment of the present invention.

[0087] This embodiment utilizes well logging curve to determine...

Embodiment 2

[0116] According to an embodiment of the present invention, there is provided a system for determining the position of a river channel using well logging curves. The system includes a memory, a processor, and a computer program stored in the memory and operable on the processor. When the processor executes the program, the following Steps: Step 1, based on single-well microfacies division, identify the log curve segment corresponding to the channel micro-correspondence, and determine the sawtooth contained in the log curve segment; Step 2, calculate the average amplitude, distribution density, and distribution frequency of the sawtooth; Step 3 , respectively determine the weight coefficient corresponding to the average amplitude, distribution density, and distribution frequency of the sawtooth, and calculate the toothing rate of the logging curve segment based on the average amplitude, distribution density, distribution frequency and the corresponding weight coefficient of the s...

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Abstract

The invention discloses a method and system for determining the position of a river channel by means of a logging curve. The method comprises the following steps of identifying a logging curve sectioncorresponding to a channel micro-phase on the basis of single-well micro-phase division and determining serrations contained in the logging curve section; calculating the average amplitude, distribution density and distribution frequency of the serrations; determining weight coefficients corresponding to the average amplitude, distribution density and distribution frequency of the serrations separately and calculating the serration rate of the logging curve section on the basis of the average amplitude, distribution density and distribution frequency of the serrations and the weight coefficients corresponding to the average amplitude, distribution density and distribution frequency of the serrations; determining the position of the river channel on the basis of the serration rate. The serration rate is used for representing the serration degree of the logging curve and generally comprises three parameters, namely the average amplitude of the serrations, the distribution density of theserrations and the distribution frequency of the serrations, and on the basis of the three parameters, the position of the river channel is quantitatively described. The method is high in operability, clear in result and capable of reducing the labor cost and increasing the exploration and development success rate of oil-gas fields and has an important meaning on the development and evaluation ofthe oil-gas fields.

Description

technical field [0001] The invention relates to the field of oil exploration and development, and more specifically, to a method and system for determining the position of a river channel by using well logging curves. Background technique [0002] The traditional study of channel microfacies generally counts the data of formation thickness, sandstone thickness and sand content of each layer on a single well, takes the well point as the control point, draws the contour line in the work area, and then analyzes the sand body on the plane The distribution status of the river and the determination of the channel microfacies distribution in the work area. The results of traditional channel microfacies research methods are relatively macroscopic, and the accuracy of the research results is far from enough for the current development stage of oil and gas fields. The current research status and field requirements of oil and gas fields, and the research results of sedimentary microfa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V5/04
CPCG01V5/04
Inventor 张广权李浩胡向阳陈舒薇高青松贾超刘绪刚李宏涛
Owner CHINA PETROLEUM & CHEM CORP
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