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A Method for Restoring Paleo-sedimentary Boundaries of Basins Based on Stability Factors of Heavy Minerals

A stability coefficient and mineral technology, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of strong multi-solution and high probability of sedimentary boundaries in basins, and achieve effective restoration of ancient sedimentary boundaries, reduce errors, The effect of reasonable transport distance

Active Publication Date: 2017-12-26
NORTHWEST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, based on a simple linear relationship, without analysis and screening, the identification results of the heavy mineral content in the sample are directly used, and the determined basin sedimentary boundary is highly ambiguous and highly probable.

Method used

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  • A Method for Restoring Paleo-sedimentary Boundaries of Basins Based on Stability Factors of Heavy Minerals
  • A Method for Restoring Paleo-sedimentary Boundaries of Basins Based on Stability Factors of Heavy Minerals
  • A Method for Restoring Paleo-sedimentary Boundaries of Basins Based on Stability Factors of Heavy Minerals

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Example 1, W area

[0029] A method for restoring the paleo-sedimentary boundary of a basin based on the stability coefficient of heavy minerals, comprising the following steps:

[0030] 1) Homing the isochronous intervals of the samples from the sedimentary-heavy mineral area in the W area, adding and summing the arithmetic mean values ​​of the stable minerals and unstable minerals and heavy minerals in the samples of each isochronous interval, and then dividing them, Obtain the representative values ​​of the heavy mineral stability coefficients of each isochronous interval in this area (Table 2);

[0031] Table 2 List of representative values ​​of heavy mineral stability coefficients and their transportation distances in different eras in W area

[0032]

[0033] 2) Substituting the representative value of the heavy mineral stability coefficient obtained in step 1) into the relationship formula between the heavy mineral stability coefficient and the transport dist...

Embodiment 2

[0039] Embodiment 2, D area

[0040] A method for restoring the paleo-sedimentary boundary of a basin based on the stability coefficient of heavy minerals, comprising the following steps:

[0041] 1) Homing the isochronous intervals of the samples from the sedimentary-heavy mineral area in D area, adding and summing the arithmetic mean values ​​of the stable minerals and unstable minerals and heavy minerals in the samples of each isochronous interval, and then dividing them, Obtain the representative value of the heavy mineral stability coefficient of each isochronous layer in the area, and further fit to obtain the exponential relationship K of the representative value of the heavy mineral stability coefficient in the area with time x =27.291e -3.769x ,

[0042] In the formula: Kx is the calculation representative value of the stability coefficient in different periods, X is the serial number of the geological era, and the correlation coefficient r=0.943 is close to 1, whic...

Embodiment 3

[0052] Example 3, Region Y

[0053] A method for restoring the paleo-sedimentary boundary of a basin based on the stability coefficient of heavy minerals, comprising the following steps:

[0054] 1) Homing the isochronous intervals of the samples from the sedimentary-heavy mineral area in the Y area, adding and summing the arithmetic mean values ​​of the stable minerals and unstable minerals and heavy minerals in the samples of each isochronic interval, and then dividing them, Obtain the representative value of the heavy mineral stability coefficient of each isochronous layer in the area, and further fit to obtain the exponential relationship K of the representative value of the heavy mineral stability coefficient in the area with time x =27.708e -0.3908x ,

[0055] In the formula: Kx is the calculation representative value of the stability coefficient in different periods, X is the serial number of the geological era, and the correlation coefficient r=0.929 is close to 1, w...

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Abstract

A method to restore the paleo-sedimentary boundary of a basin based on the stability coefficient of heavy minerals. First, the sedimentary-heavy mineral area samples are placed in isochronous intervals, and the stable minerals and unstable minerals in the isochronous interval samples are arithmetic. The average values ​​are added up, summed, and then divided to obtain the representative value of the heavy mineral stability coefficient of the isochronous layer, or further fitted to obtain the exponential relationship of the representative value of the heavy mineral stability coefficient in the area changing with time, to obtain Calculate the representative value of the heavy mineral stability coefficient in each area at different times; then substitute it into the formula of the relationship between the heavy mineral stability coefficient and the transportation distance to calculate the sediment transportation distance in each area at different times, and initially determine the paleo-sedimentary boundaries of the basin in different periods; and finally comprehensively study the basin Compare and confirm the obtained basin boundary with characteristic data such as the surrounding residual strata of the same era and the uplift time limit of adjacent mountains, and finally determine the ancient sedimentary boundary of the basin. The ancient basin boundary value obtained by this invention is more reasonable and reliable. .

Description

technical field [0001] The invention relates to the technical field of restoring ancient basin sedimentary boundaries, in particular to a method for restoring basin ancient sedimentary boundaries based on heavy mineral stability coefficients. Background technique [0002] Restoring the sedimentary boundaries of paleo-basins is one of the important contents in the study of sedimentary basins, and it is of great significance to the oil and gas exploration and geological research of the basins. Most people in the past believed that the restoration of the basin boundary was a process of restoring the sedimentary environment. Therefore, they often limited or qualitatively restored the paleo-basin boundary ( Yu Chunhui et al., 1996; Liu Linyu et al., 2007; Chen Jianjun et al., 2007; Wang Jincheng et al., 2011; Liang Yuan et al., 2013). However, the above-mentioned method is not suitable for the ancient basins where the later transformation is intense, especially the marginal faci...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
CPCG06F30/13
Inventor 刘池阳宋立军王建强黄雷赵红格张东东
Owner NORTHWEST UNIV