Method for forming acoustic logging curve

A technology of well logging curves and sound waves, which is used in the fields of seismology, surveying, earthwork drilling and production for well logging records, and can solve the problems of old logging series, missing well logging curves, digital processing and interpretation of well logging, etc. problem, to achieve the effect of quantitative calculation and good application effect

Active Publication Date: 2014-01-01
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology

[0004] In the process of realizing the present invention, the inventor found that the prior art has at least the following problems: in some old wells that need to be re-interpreted and evaluated, there are cases where the logging series is relatively old and the logging curves are seriously missing, and some wells even have only diameter, spontaneous potential and resistivity curves, which brings great difficulties to the digital processing and interpretation of well logs. Therefore, it is urgent to carry out research on data mining and construction of well log curves.

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  • Method for forming acoustic logging curve

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Embodiment 1

[0027] The present embodiment provides a method for constructing a sonic logging curve, the method comprising the following steps:

[0028] Step 1, understanding the geological background data of the well area where the acoustic logging curve is to be constructed, analyzing the characteristics of the formation resistivity curve, and obtaining the geological background data and formation resistivity curve characteristic data of the area where the acoustic logging curve is to be constructed;

[0029] Step 2: Determine the deep lateral resistivity curve LLD, the shallow lateral resistivity curve LLS and the logging depth curve DEP of the well where the acoustic logging curve is to be constructed according to the geological background data and the characteristic data of the formation resistivity curve. The sonic logging curve of the well where the sonic logging curve is located is:

[0030] AC = a 0 + ...

Embodiment 2

[0040] This embodiment provides a device for constructing a sonic logging curve, the device comprising:

[0041]The data acquisition module is used to acquire the geological background data and formation resistivity curve characteristic data of the area where the acoustic logging curve is to be constructed;

[0042] A determining module, configured to determine the deep lateral resistivity curve LLD, the shallow lateral resistivity curve LLS, and the log of the well where the acoustic logging curve to be constructed is located according to the geological background data and the characteristic data of the formation resistivity curve. Well depth curve DEP;

[0043] A construction module, configured to obtain the acoustic logging curve of the well where the acoustic logging curve to be constructed is located according to the deep lateral resistivity curve LLD, the shallow lateral resistivity curve LLS and the logging depth curve DEP.

[0044] Preferably, the construction module ...

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Abstract

The invention discloses a method for forming an acoustic logging curve. The method comprises the following steps: acquiring the geological background data and formation resistivity curve characteristic data of a region where an acoustic logging curve to be formed is positioned; determining a deep lateral resistivity curve LLD, a hollow lateral resistivity curve LLS and a logging depth curve DEP of the region where the acoustic logging curve to be formed is positioned according to the geological background data and the formation resistivity curve characteristic data to obtain the acoustic logging curve in the region where the acoustic logging curve to be formed is positioned, wherein the acoustic logging curve is shown as a formula in the specification; in the formula, a0 and a1 refer to coefficients to be determined, b1 and b2 refer to fitting indexes to be determined, and a0, a1, b1 and b2 are determined through least square fitting. The method belongs to the technical field of oil well logging. According to the method, the acoustic logging curve is formed, so that the problem of incapability of calculating the reservoir porosity due to the lack of the acoustic logging curve is solved, and service can be offered in time or the demand of practical production can be met.

Description

technical field [0001] The invention relates to the technical field of petroleum logging, in particular to a method for constructing acoustic logging curves. Background technique [0002] In the field of oil exploration and logging technology, with the development of logging technology and logging instruments, the processing and interpretation of logging data can more truly reflect the conditions of underground reservoirs, but in some old wells that need to be re-interpreted, there are The well series are old, the logging curves are seriously missing, and some wells even only have the borehole diameter and potential or resistivity curves, which brings great difficulties to the digital processing and interpretation of the logging data. Based on this, data mining And log curve construction research is very necessary. [0003] The so-called well logging curve construction is the method of obtaining the well logging curve by using the relationship between the existing well logg...

Claims

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Application Information

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IPC IPC(8): E21B47/14E21B49/00G01V1/40
Inventor 万金彬李东平夏朝辉王娟黄科陶平张铭龚守捍丁伟程道解白松涛陈杨军
Owner BC P INC CHINA NAT PETROLEUM CORP
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