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Method of calculating mineral components of rock in formations through element contents

A technology of mineral composition and element content, which is applied in calculation, earthwork drilling, special data processing applications, etc., can solve the problems of insufficient logging data, usage restrictions, lack of element content data, etc., so as to improve calculation accuracy and improve accuracy. The effect of high performance and fast calculation speed

Inactive Publication Date: 2014-03-05
CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD
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AI Technical Summary

Problems solved by technology

The main problem is that the calculation of formation rock mineral composition and volume content by well logging is mostly based on conventional well logging data.
However, there is a major problem: when there are multiple rock mineral compositions in the formation, due to the insufficient amount of conventional logging data, the calculated rock mineral composition types will be relatively small, because there is a lack of element content data that can best reflect the rock mineral composition. Therefore, it is difficult to accurately calculate the mineral composition of formation rocks
[0004] Moreover, the element logging processing methods introduced by foreign companies such as Schlumberger and Halliburton are special processing methods, which can only process element logging data of their own companies, and cannot process element logging data of other companies. Moreover, the element logging data processing technology of foreign companies is highly confidential and is not disclosed to the public. Therefore, it is impossible to understand and master the key technology of element logging data processing

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  • Method of calculating mineral components of rock in formations through element contents
  • Method of calculating mineral components of rock in formations through element contents
  • Method of calculating mineral components of rock in formations through element contents

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Embodiment 1

[0032] A method for calculating the volume content of formation rock mineral components by element content, comprising: taking the formation element content curve and conventional well logging curve obtained from element logging as input information, combined with regional geological parameters, and calculating the complex lithology formation rock Volume content of mineral components.

[0033] Described method specifically comprises the following steps:

[0034] a. The rock space of the strata consists of minerals and pores, and the volume model of the logging response to the rock space is:

[0035] ( i=1,2,...m ) (1)

[0036] In formula (1): A is the coefficient matrix, that is, the mineral composition logging skeleton response value; B is the logging value, that is, the response value of the formation to the logging instrument; X is the volume to be solved, that is, the mineral composition of the formation rock; m is the number of logging items, n is the numbe...

Embodiment 2

[0049] Solve the problem of how to convert the formation element content obtained from well logging into the formation rock mineral volume content, and obtain the formation rock mineral composition.

[0050] The technical scheme that solves its technical problem is briefly described as follows:

[0051] The rock space of the formation is composed of minerals and pores, and the minerals are generally composed of quartz, feldspar, calcite, dolomite, pyrite, organic matter (kerogen), gypsum, coal, illite, chlorite, montmorillonite, etc. . The volume model for the log response to the rock space is:

[0052] ( i=1,2,...m ) (1)

[0053] In formula (1): A is the coefficient matrix, which is the response value of the mineral composition logging framework; B is the logging value, that is, the response value of the formation to the logging instrument; X is the volume to be solved, that is, the mineral composition of the formation rock; m is the number of logging items, a...

Embodiment 3

[0078] Through the calculation method of the present invention, the formation rock mineral composition such as figure 1 , figure 2 shown. figure 1 Among them, the first track is the depth, the second, third, and fourth track are conventional logging curves, and the element content of the fifth track is Al, Fe, Ca, Mg, Su, and Si are aluminum, iron, calcium, magnesium, sulfur, The weight content of silicon element, the sixth GEM is the mineral component content processed by Halliburton software, the seventh PROGRAM is the mineral component content result calculated by the present invention, Dolomite is the volume of dolomite, Calcite is the volume of calcite, and Pyrite is the volume of calcite. Pyrite volume, Quartz is the volume of quartz, Kero is the volume of kerogen, and Illite is the volume of illite.

[0079] figure 2 Among them, the first track is the depth, the second, third, and fourth track are conventional logging curves, and the element content of the fifth ...

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Abstract

The invention discloses a method of calculating mineral components of rock in formations through element contents. According to the method, formation element content curves obtained by element logging and conventional logging curves are used as input information; the volume contents of rock mineral contents in complex lithological formations are calculated according to the input information and areal geological parameter. The method is applicable to the determination on rock mineral components in various complex lithological formations, and rock mineral components and porosity thereof can be calculated more accurately.

Description

technical field [0001] The invention relates to a method for calculating the mineral composition of formation rocks, in particular to a method for calculating the mineral composition of formation rocks with element content. Background technique [0002] In the prior art, the calculation of formation rock mineral composition and its volume content by well logging is mainly based on conventional well logging data. Generally, 3 porosity curves are used to calculate no more than 3 kinds of rock mineral compositions, and most of them use the solution method of linear equations; some also use No more than 8 conventional logging curves, and no more than 6 kinds of rock mineral compositions are solved by the optimization method with constraints. The main problem is that the calculation of formation rock mineral composition and volume content by well logging is mostly based on conventional well logging data. When there are many kinds of rock mineral components in the formation, due ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00E21B49/00
Inventor 罗利姜艳玲齐宝权杨嘉胡振平毛英雄王勇军杨小兵
Owner CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD
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