CN105629316A - Method and device for obtaining fluid radial oil-water saturation change of undisturbed zone - Google Patents
Method and device for obtaining fluid radial oil-water saturation change of undisturbed zone Download PDFInfo
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- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/18—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for well-logging
- G01V3/32—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for well-logging operating with electron or nuclear magnetic resonance
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- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
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Abstract
The invention discloses a method and a device for obtaining fluid radial oil-water saturation change of an undisturbed zone, comprising steps of targeting an undisturbed zone sample under each measurement depth in a plurality of measurement depths, determining irreducible fluid data in the undisturbed zone sample according to the experience parameters of the undisturbed zone sample, obtaining the fluid data in the undisturbed zone according to the irreducible fluid data in the undisturbed zone sample, taking the fluid data of the undisturbed zone sample as an integrity to successively perform interpolation operation, inverse operation and the inverse operation of the interpolation operation, obtaining a fluid T2 spectrum in the undisturbed zone sample, extracting the oil signal spectrum and the water signal spectrum in the fluid T2 spectrum, and obtaining the fluid oil saturation in the undisturbed zone sample according to the oil signal spectrum and the water signal spectrum. The invention obtains the fluid radial oil water saturation change according to the fluid oil water saturation of the undisturbed zone sample under a plurality of measurement depths and enables the result to be close to the undisturbed zone storage and more accurate.
Description
Technical field
The present invention relates to nuclear magnetic resonance log field, particularly relate to method and the device of a kind of fluid radially profit saturation change obtaining undisturbed formation.
Background technology
There is constraint fluid and fluid in undisturbed formation, wherein, the profit saturation of fluid is to measure the important parameter of reserves in undisturbed formation. By the measurement of the fluid oil water saturation to original-pack bottom and calculating, provide for the exploitation of undisturbed formation and provide powerful support for.
In the prior art, use multifrequency nuclear magnetic resonance apparatus that the fluid signal in undisturbed formation is made directly measurement, thus the fluid oil water saturation obtaining undisturbed formation is a kind of conventional method. Inversion Calculation is carried out, thus obtaining stratum radial fluid saturation after the data generally recorded in different frequency section by nuclear magnetic resonance apparatus are average.
But, in the existing survey calculation process to profit saturation, the measurement scope measured due to multifrequency nuclear magnetic resonance apparatus is only small, and its measurement scope is by chance in the flushed zone of well logging. And in flushed zone, due to fold, the impact of the factors such as drilling fluid, can cause that the profit saturation of the fluid in flushed zone produces change because of these factors. Real fluid oil water saturation with undisturbed formation is produced difference by the profit saturation of the undisturbed formation fluid in the flushed zone that meter calculates, and the profit saturation of the undisturbed formation fluid obtained and truth are not corresponded, have a strong impact on the judgement to undisturbed formation reserves.
Summary of the invention
The present invention provides method and device, the problem that the profit saturation of undisturbed formation fluid for solving to obtain in prior art is not inconsistent of a kind of fluid radially profit saturation change obtaining undisturbed formation with the profit saturation of actual undisturbed formation fluid.
On the one hand, the present invention provides a kind of method of fluid radially profit saturation change obtaining undisturbed formation, including:
For in multiple fathoming each fathom under undisturbed formation sample, according to the empirical parameter of described undisturbed formation sample determine in described undisturbed formation sample constraint fluid data;
Data according to the constraint fluid in described undisturbed formation sample, it is thus achieved that the fluid data in described undisturbed formation sample;
Using the fluid data of described undisturbed formation sample as entirety, it is sequentially carried out interpolation arithmetic, the inverse operation of complementary operation and described interpolation arithmetic, it is thus achieved that the fluid T in described undisturbed formation sample2Spectrum;
Extract described fluid T2Oily signal spectrum in spectrum and water signal spectrum, and calculate, according to described oil signal spectrum and described water signal spectrum, the fluid oil water saturation obtained in described undisturbed formation sample;
Fluid oil water saturation according to the undisturbed formation sample under the plurality of fathoming, matching obtains the fluid radially profit saturation change of undisturbed formation.
On the other hand, the present invention also provides for the device of a kind of fluid radially profit saturation change obtaining undisturbed formation, including:
First computing module, for for lower undisturbed formation sample that fathoms each in multiple fathoming, determining the data fettering fluid in described undisturbed formation sample according to the empirical parameter of described undisturbed formation sample;
Second computing module, for the data according to the constraint fluid in described undisturbed formation sample, it is thus achieved that the fluid data in described undisturbed formation sample;
3rd computing module, is used for the fluid data of described undisturbed formation sample as entirety, is sequentially carried out interpolation arithmetic, the inverse operation of complementary operation and described interpolation arithmetic, it is thus achieved that the fluid T in described undisturbed formation sample2Spectrum;
4th computing module, is used for extracting described fluid T2Oily signal spectrum in spectrum and water signal spectrum, and calculate, according to described oil signal spectrum and described water signal spectrum, the fluid oil water saturation obtained in described undisturbed formation sample;
Fitting module, for the fluid oil water saturation according to the undisturbed formation sample under the plurality of fathoming, matching obtains the fluid radially profit saturation change of undisturbed formation.
The method of the fluid of undisturbed formation provided by the invention radially profit saturation change and device, by in multiple fathoming each fathom under undisturbed formation sample, according to the empirical parameter of described undisturbed formation sample determine in described undisturbed formation sample constraint fluid data; Data according to the constraint fluid in described undisturbed formation sample, it is thus achieved that the fluid data in described undisturbed formation sample; Using the fluid data of described undisturbed formation sample as entirety, it is sequentially carried out interpolation arithmetic, the inverse operation of complementary operation and described interpolation arithmetic, it is thus achieved that the fluid T in described undisturbed formation sample2Spectrum; Extract described fluid T2Oily signal spectrum in spectrum and water signal spectrum, and calculate, according to described oil signal spectrum and described water signal spectrum, the fluid oil water saturation obtained in described undisturbed formation sample; Fluid oil water saturation according to the undisturbed formation sample under the plurality of fathoming, matching obtains the fluid radially profit saturation change of undisturbed formation. The radially profit saturation change of the fluid of the undisturbed formation that the present invention is obtained by said method and device, it is thus possible to the fluid radially profit saturation measuring the undisturbed formation obtained is corrected by the radially profit saturation change of the fluid of undisturbed formation, result of calculation is made more to press close to real undisturbed formation reserves, accuracy is higher, provides strong guarantee for stratum exploitation.
Accompanying drawing explanation
The schematic flow sheet of a kind of fluid radially method of profit saturation change obtaining undisturbed formation that Fig. 1 provides for the embodiment of the present invention one;
The fluid radially profit saturation change schematic diagram that the method for the fluid the obtaining undisturbed formation radially profit saturation change that Fig. 2 provides for the embodiment of the present invention one obtains;
The schematic flow sheet of a kind of fluid radially method of profit saturation change obtaining undisturbed formation that Fig. 3 provides for the embodiment of the present invention two;
The fluid T obtained in undisturbed formation sample that Fig. 4 provides for the embodiment of the present invention two2The schematic diagram of spectrum;
The structural representation of a kind of fluid radially device of profit saturation change obtaining undisturbed formation that Fig. 5 provides for the embodiment of the present invention three.
Detailed description of the invention
For making the purpose of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described.
The schematic flow sheet of a kind of fluid radially method of profit saturation change obtaining undisturbed formation that Fig. 1 provides for the embodiment of the present invention one, as it is shown in figure 1, the method includes following several steps:
Step 101, in multiple fathoming each fathom under undisturbed formation sample, according to the empirical parameter of described undisturbed formation sample determine in described undisturbed formation sample constraint fluid data.
The executive agent of the fluid of the acquisition undisturbed formation provided by the invention radially method of profit saturation change can be the device of the fluid radially profit saturation change obtaining undisturbed formation.
Concrete, undisturbed formation sample includes constraint fluid and fluid, and the device obtaining the fluid radially profit saturation change of undisturbed formation passes through at the different places that fathoms, determine the data fettering fluid in described undisturbed formation sample respectively according to the empirical parameter of the undisturbed formation sample of this depth. Wherein, by obtaining the empirical parameter that the result of study of this undisturbed formation sample is drawn by others skilled in the art or the empirical parameter this undisturbed formation sample being carried out core experiment and drawing, determining the data fettering fluid in this undisturbed formation sample, the data of this constraint fluid specifically can include the T of constraint fluid2Spectrum, draws the T of this constraint fluid2The experimental situation parameter of spectrum and the echo etc. of constraint fluid.
Step 102, according in described undisturbed formation sample constraint fluid data, it is thus achieved that the fluid data in described undisturbed formation sample.
Concrete, it is thus achieved that the device of the fluid of undisturbed formation radially profit saturation change calculates, according to the data of the constraint fluid in undisturbed formation sample, the fluid data obtained in undisturbed formation sample. Further, it is thus achieved that the data obtaining undisturbed formation sample measured by the available multifrequency nuclear magnetic resonance log instrument of device of the fluid of undisturbed formation radially profit saturation change; The data of undisturbed formation sample screen out the data fettering fluid in undisturbed formation sample, obtains the fluid data in undisturbed formation sample. The data of this undisturbed formation sample owing to recording include data and the fluid data of constraint fluid, therefore, the data of this undisturbed formation sample available deduct the data of the constraint fluid in this original state bottom sample obtained in step 101, obtain the fluid data of this undisturbed formation sample.
Step 103, using the fluid data of described undisturbed formation sample as entirety, be sequentially carried out interpolation arithmetic, the inverse operation of complementary operation and described interpolation arithmetic, it is thus achieved that the fluid T in described undisturbed formation sample2Spectrum.
Step 104, extract described fluid T2Oily signal spectrum in spectrum and water signal spectrum, and calculate, according to described oil signal spectrum and described water signal spectrum, the fluid oil water saturation obtained in described undisturbed formation sample.
Concrete, in extraction step 103 the fluid T in undisturbed formation sample2Oily signal spectrum in spectrum and water signal spectrum, and calculate the fluid oil water saturation in this undisturbed formation sample. Further, adopt multi-factor analysis approach to described fluid T2Spectrum is analyzed, it is thus achieved that described fluid T2The oily signal spectrum of spectrum and water signal spectrum. Wherein, fluid oil water saturation can pass through convection cell T2After spectrum is integrated, with the area of oil signal spectrum and water signal spectrum divided by fluid T2The area of spectrum obtains.
Step 105, fluid oil water saturation according to the undisturbed formation sample under the plurality of fathoming, matching obtains the fluid radially profit saturation change of undisturbed formation.
The fluid radially profit saturation change schematic diagram that the method for the fluid the obtaining undisturbed formation radially profit saturation change that Fig. 2 provides for the embodiment of the present invention one obtains. As shown in Figure 2, assume to carry out 9 times fathoming to undisturbed formation sample different measurements, by the calculating of convection cell profit saturation, 9 fluid oil water saturation angle value can be obtained, these values are fitted drawing the fluid of this undisturbed formation sample profit saturation change curve diametrically.
Further, after the fluid radially profit saturation change obtaining undisturbed formation, can by it be contrasted with the theoretical fluid simulated by Theoretical Calculation radially profit saturation, obtain the intrusion curve in the time of intrusion, and further appreciated that by this intrusion curve and the fluid oil water saturation situation of undisturbed formation make technical staff better the reserves of undisturbed formation be estimated.
The method of the fluid obtaining undisturbed formation that the embodiment of the present invention one provides radially profit saturation change, by determining the data of the constraint fluid in described undisturbed formation sample respectively at several empirical parameters according to undisturbed formation sample that fathom; Data according to the constraint fluid in described undisturbed formation sample calculate the fluid data obtained in described undisturbed formation sample; Using the fluid data of described undisturbed formation sample as entirety, it is sequentially carried out interpolation arithmetic, the inverse operation of complementary operation and described interpolation arithmetic, it is thus achieved that the fluid T in described undisturbed formation sample2Spectrum; Extract described fluid T2Oily signal spectrum in spectrum and water signal spectrum, and calculate, according to described oil signal spectrum and described water signal spectrum, the fluid oil water saturation obtained in described undisturbed formation sample; Fluid oil water saturation according to the undisturbed formation sample obtained on each fathoming, matching obtains the fluid radially profit saturation change of undisturbed formation. The present invention is by the radially profit saturation change of the fluid of the obtainable undisturbed formation of said method, it is thus possible to the fluid radially profit saturation measuring the undisturbed formation obtained is corrected by the fluid radially profit saturation change according to undisturbed formation, result of calculation is made more to press close to real undisturbed formation reserves, accuracy is higher, provides strong guarantee for stratum exploitation.
Preferably, to the fluid T obtained in described undisturbed formation sample2Spectrum is more smooth and accurate, and the schematic flow sheet of a kind of fluid radially method of profit saturation change obtaining undisturbed formation that Fig. 3 provides for the embodiment of the present invention two, as it is shown on figure 3, on the basis of method shown in above-mentioned Fig. 1, step 103 specifically comprises the steps that
Step 201, the fluid data of described undisturbed formation sample is carried out cubic B-spline function interpolation arithmetic, make described fluid data be compressed.
Step 202, carry out joint inversion to by the described fluid data after compressing, and obtain described fluid data at virtual T2Data in dimension.
Step 203, to described fluid data at virtual T2Data in dimension carry out the inverse operation of described cubic B-spline function interpolation arithmetic, and obtain the fluid T in described undisturbed formation sample2Spectrum.
In order to detailed sets forth the fluid the obtaining undisturbed formation method that radially profit saturation changes that the present embodiment two provides, the fluid T obtained in undisturbed formation sample that Fig. 4 provides for the present embodiment two2The schematic diagram of spectrum.
The fluid data that Fig. 4 (A) is undisturbed formation sample, now it can be seen that echo-signal has 8 and each echo-signal all presents unipolarity; Fig. 4 (B) is the cubic B-spline function signal described in step 201, namely use this cubic B-spline function that the fluid data in Fig. 4 (A) is interpolated computing, and obtain in Fig. 4 (C) fluid data after interpolation arithmetic, now fluid data quantity is compressed into 5 echo-signals, and its signal waveform does not change; Subsequently the fluid data after the compression in Fig. 4 (C) is carried out joint inversion with generally unit, obtain the image in Fig. 4 (D); Now fluid data becomes 5 T that there is crest2Spectrum, this T2Spectrum is virtual T2Data in dimension; These data carry out the such as reduction shown in Fig. 4 (E) calculate, be specifically the inverse operation of the interpolation arithmetic of shown three the B sample functions of Fig. 4 (B), obtain the image in Fig. 4 (F); Now, fluid data is reduced to 8, is consistent with the data amount check under truth, and the data in each Fig. 4 (A) are all with T2The form of spectrum presents, and namely obtains the fluid T in undisturbed formation sample2Spectrum.
The embodiment of the present invention two provides a kind of method of fluid radially profit saturation change obtaining undisturbed formation, by the fluid data of undisturbed formation sample is carried out cubic B-spline function interpolation arithmetic, fluid data is made to be compressed, carry out joint inversion to by the fluid data after compressing, and obtain fluid data at virtual T2Data in dimension; Convection cell data are at virtual T2Data in dimension carry out the inverse operation of this cubic B-spline function interpolation arithmetic, and obtain the fluid T in undisturbed formation sample2Spectrum, so that the fluid T arrived2Spectrum is more accurate, also more smooth. By to the calculating being carried out joint inversion by the entirety of the fluid data after compressing so that each fluid data can obtain identical inverted parameters, and the inversion result obtained is more accurate.
The structural representation of a kind of fluid radially device of profit saturation change obtaining undisturbed formation that Fig. 5 provides for the embodiment of the present invention three, as shown in Figure 5, the embodiment of the present invention three provides the device of a kind of fluid radially profit saturation change obtaining undisturbed formation, including:
First computing module 10, for for lower undisturbed formation sample that fathoms each in multiple fathoming, determining the data fettering fluid in described undisturbed formation sample according to the empirical parameter of described undisturbed formation sample.
Second computing module 20, for the data according to the constraint fluid in described undisturbed formation sample, it is thus achieved that the fluid data in described undisturbed formation sample.
Further, the second computing module 20 may utilize multifrequency nuclear magnetic resonance log instrument and measures the data obtaining undisturbed formation sample; The data of undisturbed formation sample screen out the data fettering fluid in undisturbed formation sample, obtains the fluid data in undisturbed formation sample. The data of this undisturbed formation sample owing to recording include data and the fluid data of constraint fluid, therefore, the data of this undisturbed formation sample available deduct the data of the constraint fluid in this original state bottom sample that the first computing module 10 obtains, and obtain the fluid data of this undisturbed formation sample.
3rd computing module 30, is used for the fluid data of described undisturbed formation sample as entirety, is sequentially carried out interpolation arithmetic, the inverse operation of complementary operation and described interpolation arithmetic, it is thus achieved that the fluid T in described undisturbed formation sample2Spectrum.
4th computing module 40, is used for extracting described fluid T2Oily signal spectrum in spectrum and water signal spectrum, and calculate, according to described oil signal spectrum and described water signal spectrum, the fluid oil water saturation obtained in described undisturbed formation sample.
Concrete, the 4th computing module 40 can adopt multi-factor analysis approach to described fluid T2Spectrum is analyzed, it is thus achieved that described fluid T2The oily signal spectrum of spectrum and water signal spectrum.
Fitting module 50, for the fluid oil water saturation according to the undisturbed formation sample under the plurality of fathoming, matching obtains the fluid radially profit saturation change of undisturbed formation.
Concrete, the first computing module 10 fathoms down for each in multiple fathoming, and determines the data fettering fluid in undisturbed formation sample respectively according to the empirical parameter of undisturbed formation sample. The data of the constraint fluid in the undisturbed formation sample that the second computing module 20 obtains according to the first computing module 10 calculate the fluid data obtained in undisturbed formation sample. The fluid data of undisturbed formation sample obtained for the second computing module 20 as entirety, is sequentially carried out interpolation arithmetic, the inverse operation of complementary operation and described interpolation arithmetic, and obtains the fluid T in undisturbed formation sample by the 3rd computing module 302Spectrum. 4th computing module 40 extracts the fluid T of the 3rd computing module 30 gained2Oily signal spectrum in spectrum and water signal spectrum, and calculate, according to this oil signal spectrum and this water signal spectrum, the fluid oil water saturation obtained in undisturbed formation sample. The fitting module 50 fluid oil water saturation according to the 4th computing module 40 undisturbed formation sample under multiple fathoming, matching obtains the fluid radially profit saturation change of undisturbed formation.
Further, in order to make the fluid T in the undisturbed formation sample of acquisition2Spectrum is more accurate, and spectral line is more smooth, the 3rd computing module 30 specifically for: the fluid data of described undisturbed formation sample is carried out cubic B-spline function interpolation arithmetic, makes described fluid data be compressed; Carry out joint inversion to by the described fluid data after compressing, and obtain described fluid data at virtual T2Data in dimension; To described fluid data at virtual T2Data in dimension carry out the inverse operation of described cubic B-spline function interpolation arithmetic, and obtain the fluid T in described undisturbed formation sample2Spectrum. By to the calculating being carried out joint inversion by the entirety of the fluid data after compressing so that each fluid data can obtain identical inverted parameters, it is thus achieved that inversion result more accurate.
It should be noted that the device specific implementation method that the embodiment of the present invention three provides is corresponding respectively with the method that the embodiment of the present invention one and embodiment two provide, do not repeat at this.
The device of the fluid obtaining undisturbed formation that the embodiment of the present invention three provides radially profit saturation change, by in multiple fathoming each fathom under undisturbed formation sample, according to the empirical parameter of described undisturbed formation sample determine in described undisturbed formation sample constraint fluid data; Data according to the constraint fluid in described undisturbed formation sample, it is thus achieved that the fluid data in described undisturbed formation sample; Using the fluid data of described undisturbed formation sample as entirety, it is sequentially carried out interpolation arithmetic, the inverse operation of complementary operation and described interpolation arithmetic, it is thus achieved that the fluid T in described undisturbed formation sample2Spectrum; Extract described fluid T2Oily signal spectrum in spectrum and water signal spectrum, and calculate, according to described oil signal spectrum and described water signal spectrum, the fluid oil water saturation obtained in described undisturbed formation sample; Fluid oil water saturation according to the undisturbed formation sample under the plurality of fathoming, matching obtains the fluid radially profit saturation change of undisturbed formation. The radially profit saturation change of the fluid of the undisturbed formation that the present invention is obtained by said method and device, it is thus possible to the fluid radially profit saturation measuring the undisturbed formation obtained is corrected by the radially profit saturation change of the fluid of undisturbed formation, result of calculation is made more to press close to real undisturbed formation reserves, accuracy is higher, provides strong guarantee for stratum exploitation.
One of ordinary skill in the art will appreciate that: all or part of step realizing above-mentioned each embodiment of the method can be completed by the hardware that programmed instruction is relevant. Aforesaid program can be stored in a computer read/write memory medium. This program upon execution, performs to include the step of above-mentioned each embodiment of the method; And aforesaid storage medium includes: the various media that can store program code such as ROM, RAM, magnetic disc or CDs.
Last it is noted that various embodiments above is only in order to illustrate technical scheme, it is not intended to limit; Although the present invention being described in detail with reference to foregoing embodiments, it will be understood by those within the art that: the technical scheme described in foregoing embodiments still can be modified by it, or wherein some or all of technical characteristic is carried out equivalent replacement; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (8)
1. the method for the fluid radially profit saturation change obtaining undisturbed formation, it is characterised in that including:
For in multiple fathoming each fathom under undisturbed formation sample, according to the empirical parameter of described undisturbed formation sample determine in described undisturbed formation sample constraint fluid data;
Data according to the constraint fluid in described undisturbed formation sample, it is thus achieved that the fluid data in described undisturbed formation sample;
Using the fluid data of described undisturbed formation sample as entirety, it is sequentially carried out interpolation arithmetic, the inverse operation of complementary operation and described interpolation arithmetic, it is thus achieved that the fluid T in described undisturbed formation sample2Spectrum;
Extract described fluid T2Oily signal spectrum in spectrum and water signal spectrum, and calculate, according to described oil signal spectrum and described water signal spectrum, the fluid oil water saturation obtained in described undisturbed formation sample;
Fluid oil water saturation according to the undisturbed formation sample under the plurality of fathoming, matching obtains the fluid radially profit saturation change of undisturbed formation.
2. method according to claim 1, it is characterised in that the described data according to the constraint fluid in described undisturbed formation sample, it is thus achieved that the fluid data in described undisturbed formation sample, specifically includes:
Multifrequency nuclear magnetic resonance log instrument is utilized to measure the data obtaining described undisturbed formation sample;
From the data of described undisturbed formation sample, screen out the data fettering fluid in described undisturbed formation sample, obtain the fluid data in undisturbed formation sample.
3. method according to claim 1, it is characterised in that the described fluid data using described undisturbed formation sample, as entirety, is sequentially carried out interpolation arithmetic, the inverse operation of complementary operation and described interpolation arithmetic, it is thus achieved that the fluid T in described undisturbed formation sample2Spectrum, specifically includes:
The fluid data of described undisturbed formation sample is carried out cubic B-spline function interpolation arithmetic, makes described fluid data be compressed;
Carry out joint inversion to by the described fluid data after compressing, and obtain described fluid data at virtual T2Data in dimension;
To described fluid data at virtual T2Data in dimension carry out the inverse operation of described cubic B-spline function interpolation arithmetic, and obtain the fluid T in described undisturbed formation sample2Spectrum.
4. method according to claim 1, it is characterised in that the described fluid T of described extraction2Oily signal spectrum in spectrum and water signal spectrum, specifically include:
Adopt multi-factor analysis approach to described fluid T2Spectrum is analyzed, it is thus achieved that described fluid T2The oily signal spectrum of spectrum and water signal spectrum.
5. the device of the fluid radially profit saturation change obtaining undisturbed formation, it is characterised in that including:
First computing module, for for lower undisturbed formation sample that fathoms each in multiple fathoming, determining the data fettering fluid in described undisturbed formation sample according to the empirical parameter of described undisturbed formation sample;
Second computing module, for the data according to the constraint fluid in described undisturbed formation sample, it is thus achieved that the fluid data in described undisturbed formation sample;
3rd computing module, is used for the fluid data of described undisturbed formation sample as entirety, is sequentially carried out interpolation arithmetic, the inverse operation of complementary operation and described interpolation arithmetic, it is thus achieved that the fluid T in described undisturbed formation sample2Spectrum;
4th computing module, is used for extracting described fluid T2Oily signal spectrum in spectrum and water signal spectrum, and calculate, according to described oil signal spectrum and described water signal spectrum, the fluid oil water saturation obtained in described undisturbed formation sample;
Fitting module, for the fluid oil water saturation according to the undisturbed formation sample under the plurality of fathoming, matching obtains the fluid radially profit saturation change of undisturbed formation.
6. device according to claim 5, it is characterised in that described second computing module specifically for:
Multifrequency nuclear magnetic resonance log instrument is utilized to measure the data obtaining described undisturbed formation sample;
From the data of described undisturbed formation sample, screen out the data fettering fluid in described undisturbed formation sample, obtain the fluid data in undisturbed formation sample.
7. device according to claim 5, it is characterised in that described 3rd computing module specifically for:
The fluid data of described undisturbed formation sample is carried out cubic B-spline function interpolation arithmetic, makes described fluid data be compressed;
Carry out joint inversion to by the described fluid data after compressing, and obtain described fluid data at virtual T2Data in dimension;
To described fluid data at virtual T2Data in dimension carry out the inverse operation of described cubic B-spline function interpolation arithmetic, and obtain the fluid T in described undisturbed formation sample2Spectrum.
8. device according to claim 5, it is characterised in that described 4th computing module specifically for:
Adopt multi-factor analysis approach to described fluid T2Spectrum is analyzed, it is thus achieved that described fluid T2The oily signal spectrum of spectrum and water signal spectrum.
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| CN106324688A (en) * | 2016-09-23 | 2017-01-11 | 中国石油大学(北京) | Reservoir irreducible water saturation determining method and device |
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