CN108086970A - A kind of Impulse Oxygen Activation Log auto-correlation means of interpretation and device - Google Patents
A kind of Impulse Oxygen Activation Log auto-correlation means of interpretation and device Download PDFInfo
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- CN108086970A CN108086970A CN201711450296.7A CN201711450296A CN108086970A CN 108086970 A CN108086970 A CN 108086970A CN 201711450296 A CN201711450296 A CN 201711450296A CN 108086970 A CN108086970 A CN 108086970A
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- oxygen activation
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T11/00—2D [Two Dimensional] image generation
- G06T11/20—Drawing from basic elements, e.g. lines or circles
- G06T11/203—Drawing of straight lines or curves
Abstract
The invention discloses a kind of Impulse Oxygen Activation Log auto-correlation means of interpretation, it is related to the note production profile logging data interpretation field of oil well, gas well, polymer borehole logging tool, including：Oxygen activation time spectral curve is drawn according to oxygen activation logging temporal profile data；Auto-correlation computation is carried out to the oxygen activation time spectral curve and obtains autocorrelator trace；The maximal peak point of the autocorrelator trace is calculated, records the maximal peak point corresponding time as the transition time；According to the transition time and with source away from the flow velocity for calculating the medium；The flow of the medium is obtained according to the cross-sectional area of the flow velocity and experiment tubing string.And device.It is larger to solve existing bidirectional pulse neutron oxygen activation log means of interpretation weighted mean method error under polymer and ternary composite driving medium, it is impossible to the problem of being applicable in Fine structural interpretation.
Description
Technical field
The present invention relates to oil well, gas well, polymer borehole logging tool note production profile logging data interpretation field, specifically
A kind of Impulse Oxygen Activation Log auto-correlation means of interpretation and device.
Background technology
Existing bidirectional pulse neutron oxygen activation log means of interpretation weighted mean method is situated between in polymer and ternary composite driving
Error is larger under matter, it is impossible to be applicable in Fine structural interpretation.
The device used at present is short by upper helmet, upper seal head, anti-magnetic short section, accelerator for neutron production pipe nipple and detector I, II
Section, tail cap composition, wherein upper helmet, upper seal head, are connected, anti-magnetic short section passes through gas-charging connection by magnetic connector with anti-magnetic short section
Pipe nipple is connected with II pipe nipple of detector, accelerator for neutron production pipe nipple, I pipe nipple of detector successively, and passes through thread bush and be connected with tail cap
It connects.
The content of the invention
In view of this, the present invention provides a kind of Impulse Oxygen Activation Log auto-correlation means of interpretation and device, existing to solve
Bidirectional pulse neutron oxygen activation log means of interpretation weighted mean method under polymer and ternary composite driving medium error it is larger,
The problem of Fine structural interpretation cannot be applicable in.
In a first aspect, the present invention provides a kind of Impulse Oxygen Activation Log auto-correlation means of interpretation, including：
Oxygen activation time spectral curve is drawn according to oxygen activation logging temporal profile data；
Auto-correlation computation is carried out to the oxygen activation time spectral curve and obtains autocorrelator trace；
The maximal peak point of the autocorrelator trace is calculated, records the maximal peak point corresponding time as when getting over
Between；
According to the transition time and with source away from the flow velocity for calculating the medium；
The flow of the medium is obtained according to the cross-sectional area of the flow velocity and experiment tubing string.
Preferably, number is composed between at least 2 sets of the oxygen activation logging temporal profile data demarcated under different flow is described
According to, it is described between modal data draw the oxygen activation time spectral curve respectively, select in the oxygen activation time spectral curve second
Peak value is maximum or the first minor peaks carry out auto-correlation plus the oxygen activation time spectral curve of the second minor peaks summation maximum
Computing obtains autocorrelator trace.
Preferably, oxygen activation logging experiment is carried out, when obtaining the oxygen activation logging that medium is demarcated under different flow
Between modal data.
Preferably, the oxygen activation logging experiment, analog casing, simulation oil are measured using Impulse Oxygen Activation Log instrument respectively
The oxygen activation logging temporal profile data that pipe and the medium in ring set space are demarcated under different flow；
Wherein, the ring set space is by the space with being formed on the outside of the simulation oil pipe on the inside of the analog casing.
Second aspect, the present invention provide a kind of Impulse Oxygen Activation Log auto-correlation interpreting means, including：
Memory and processor and storage on a memory and the computer program that can run on a processor, the calculating
Machine program be such as a kind of above-mentioned Impulse Oxygen Activation Log auto-correlation means of interpretation, the processor realized when performing described program with
Lower step：
Oxygen activation time spectral curve is drawn according to oxygen activation logging temporal profile data；
Auto-correlation computation is carried out to the oxygen activation time spectral curve and obtains autocorrelator trace；
The maximal peak point of the autocorrelator trace is calculated, records the maximal peak point corresponding time as when getting over
Between；
According to the transition time and with source away from the flow velocity for calculating the medium；
The flow of the medium is obtained according to the cross-sectional area of the flow velocity and experiment tubing string.
The present invention at least has the advantages that：
The present invention explains new method for a kind of bidirectional pulse oxygen activation, and the purpose of invention is eliminated in polymer or tri compound
Lower oxygen activation interpretation errors influence factor is driven, new method is provided for oxygen activation explanation.The present invention from fluid viscosity influence, no
It influenced by tubular column structure, influenced from lithology, pore structure and size, can targetedly improve injection well, water filling
The effect of the well displacement of reservoir oil.Flow in oil pipe, which can not only be measured, can also measure the flow of separate water injection well oil sets annular space.
Description of the drawings
By below with reference to description of the attached drawing to the embodiment of the present invention, the above and other purposes of the present invention, feature and
Advantage is apparent, in the accompanying drawings：
Fig. 1 is a kind of flow graph schematic diagram of Impulse Oxygen Activation Log auto-correlation means of interpretation of the embodiment of the present invention.
Fig. 2 is that a kind of bidirectional pulse neutron oxygen of Impulse Oxygen Activation Log auto-correlation means of interpretation of the embodiment of the present invention is lived
Change principle of instrument schematic diagram；
Fig. 3 is a kind of experimental method schematic diagram of Impulse Oxygen Activation Log auto-correlation means of interpretation of the embodiment of the present invention；
Fig. 4 is a kind of oxygen activation well logging instrument measurement of Impulse Oxygen Activation Log auto-correlation means of interpretation of the embodiment of the present invention
Data；
Fig. 5 is to set a song to music a kind of oxygen activation time of Impulse Oxygen Activation Log auto-correlation means of interpretation of the embodiment of the present invention
Line；
Fig. 6 is a kind of oxygen activation time spectrum of Impulse Oxygen Activation Log auto-correlation means of interpretation of the embodiment of the present invention from phase
Close curve；
Fig. 7 is that a kind of auto-correlation means of interpretation of Impulse Oxygen Activation Log auto-correlation means of interpretation of the embodiment of the present invention is intended
Close curve；
Fig. 8 is getting under a kind of different flow of Impulse Oxygen Activation Log auto-correlation means of interpretation of the embodiment of the present invention
Time changing curve；
Fig. 9 is a kind of schematic diagram of Impulse Oxygen Activation Log auto-correlation interpreting means of the embodiment of the present invention.
Specific embodiment
Below based on embodiment, present invention is described, but what deserves to be explained is, the present invention is not limited to these realities
Apply example.Below to the present invention datail description in, it is detailed to describe some specific detail sections.However, for not detailed
The part described to the greatest extent, those skilled in the art can also understand the present invention completely.
In addition, it should be understood by one skilled in the art that the attached drawing provided simply to illustrate that the purpose of the present invention,
Feature and advantage, attached drawing are not to be actually drawn to scale.
Meanwhile unless the context clearly requires otherwise, otherwise throughout the specification and claims " comprising ", "comprising" etc.
Similar word should be construed to the meaning included rather than exclusive or exhaustive meaning；That is, it is " including but not limited to "
Meaning.
Fig. 1 is a kind of flow graph schematic diagram of Impulse Oxygen Activation Log auto-correlation means of interpretation of the embodiment of the present invention.Such as Fig. 1
It is shown, a kind of Impulse Oxygen Activation Log auto-correlation means of interpretation, including：Step 101 is painted according to oxygen activation logging temporal profile data
Oxygen activation time spectral curve processed；Step 102 carries out auto-correlation computation to the oxygen activation time spectral curve and obtains autocorrelator trace；
Step 103 calculates the maximal peak point of the autocorrelator trace, records the maximal peak point corresponding time as the transition time；
Step 104 is according to the transition time and with source away from the flow velocity for calculating the medium；Step 105 is according to the flow velocity and experiment tube
The cross-sectional area of column obtains the flow of the medium.
Further, in Fig. 1, at least 2 sets of the oxygen activation logging temporal profile data demarcated under different flow
Described modal data, it is described between modal data draw the oxygen activation time spectral curve respectively, the oxygen activation time is selected to set a song to music
The second minor peaks maximum or the first minor peaks add the oxygen activation time spectral curve of the second minor peaks summation maximum in line
It carries out auto-correlation computation and obtains autocorrelator trace.
Further, in Fig. 1, oxygen activation logging experiment is carried out, obtains the oxygen that medium is demarcated under different flow
Activation logging temporal profile data.
Further, in Fig. 1, the oxygen activation logging experiment, simulation is measured using Impulse Oxygen Activation Log instrument respectively
The oxygen activation logging temporal profile data that the medium of casing, simulation oil pipe and ring set space is demarcated under different flow；Its
In, the ring set space is by the space formed on the inside of the analog casing with the simulation oil pipe outside, specific measurement side
Method refers to the description in Fig. 2 and Fig. 3.
Fig. 2 is that a kind of bidirectional pulse neutron oxygen of Impulse Oxygen Activation Log auto-correlation means of interpretation of the embodiment of the present invention is lived
Change principle of instrument schematic diagram.As shown in Fig. 2, the diameter of Impulse Oxygen Activation Log instrument has two kinds of 41mm and 38mm, oxygen activation logging
The Impulse Oxygen Activation Log instrument used is tested, including：Target pole 1, target grade 2,2 given-ioff neutron of target pole 1 or target grade, make target pole 1 or target
Water around grade 2 is activated, the first gamma detector D1, the second gamma detector D2, the 3rd gamma detector D3 and the 4th gal
Horse detector D4 can detect Gama Count rate, and CCL is magnetic orientation instrument, for measuring the validity of down-hole string instrument,
TEMP is temperature reception instrument, receives or measurement downhole temperature, PRESS are pressure receiving instrument, reception or measurement down-hole pressure.
Impulse Oxygen Activation Log instrument is put into progress Laboratory Calibration (that is, the mark of oxygen activation logging temporal profile data in vertical analog well
It is fixed).
Fig. 3 is a kind of experimental method schematic diagram of Impulse Oxygen Activation Log auto-correlation means of interpretation of the embodiment of the present invention.
As shown in figure 3, the experimental provision of oxygen activation logging experiment includes polymer configuration system and remote control flow collection system 4,
Polymer configures system, including：Analog casing 1, simulation oil pipe 2 and oxygen activation well logging instrument 3, remote control flow collection system 2,
For adjusting flow and gathered data, simulation oil pipe 2 is simulating oil pipe 2 in the inside of analog casing 1, oxygen activation well logging instrument 3
Inside, by adjusting inlet 1-1 injected medias (e.g., water or polymer), the flow that medium is flowed out by liquid outlet 1-2 is realized
To calibration of the Impulse Oxygen Activation Log instrument under different flow.
Specifically, in figure 3, when measuring analog casing 1, simulation oil pipe 2 is not allowed to enter in measurement analog casing 1, oxygen
Activation logging instrument 3 adjusts the flow of inlet 1-1 injected medias in analog casing 1 is measured, and medium is flowed out by liquid outlet 1-2,
Realize the calibration of the measurement oxygen activation logging temporal profile data under different flow of analog casing 1；During measurement simulation oil pipe 2, Jie is allowed
Matter is directly entered by inlet 1-1 in simulation oil pipe 2, and oxygen activation well logging instrument 3 adjusts inlet in oil pipe 2 is simulated in measurement
The flow of 1-1 injected medias, medium are flowed out by liquid outlet 1-2, realize the measurement simulation oxygen activation logging under different flow of oil pipe 2
The calibration of temporal profile data；When measuring ring set space (that is, 1 inside of analog casing, 2 outside of simulation oil pipe), simulation oil pipe 2 is in mould
Intend the inside of casing 1, oxygen activation well logging instrument 3 is in the inside of simulation oil pipe 2, the flow of adjusting inlet 1-1 injected medias, medium
It is flowed out by liquid outlet 1-2, realizes the calibration of measurement ring set space oxygen activation logging temporal profile data under different flow.Long-range control
Flow collection system 4 processed, for controlling to adjust the stream of inlet 1-1 injected medias and acquisition analog casing 1 in different flow
The calibration of lower oxygen activation logging temporal profile data, the calibration for simulating the oxygen activation logging temporal profile data under different flow of oil pipe 2
With the calibration of ring set space oxygen activation logging temporal profile data under different flow.
Fig. 4 is a kind of oxygen activation well logging instrument measurement of Impulse Oxygen Activation Log auto-correlation means of interpretation of the embodiment of the present invention
Data.As shown in figure 4, being illustrated with reference to Fig. 2, the suffix obtained using oxygen activation well logging instrument measurement is lived for the oxygen of .wfl forms
Change log-time modal data file, each content data file such as Fig. 4, Channel are classified as the serial number of admission data, the first gal
Horse detector D1, the second gamma detector D2, the 3rd gamma detector D3 and the 4th gamma detector D4 can detect first
Gama Count rate U1, the second Gama Count rate U2, the 3rd Gama Count rate U3 and the 4th Gama Count rate U4 are classified as different gammas
The Gama Count rate that detector detects.From oxygen activation apparatus measures principle, 2 continuous given-ioff neutron of target pole 1 or target grade makes
Medium around target pole 1 or target grade 2 is activated, and the medium after activation reaches the first gamma detector D1 successively, the second gamma is visited
Device D2, the 3rd gamma detector D3 and the 4th gamma detector D4 are surveyed, current reach each detector according to time spectral curve
Time T, since water in this period (neutron burst to detector detects the time of activation current) distance for walking is exactly each
Speed V=L/T of the source of detector away from L, then water.Due to well inner sleeve and tubing diameter D it is known that the sectional area of water can be calculated
S, then flow Q=VS.
Fig. 5 is to set a song to music a kind of oxygen activation time of Impulse Oxygen Activation Log auto-correlation means of interpretation of the embodiment of the present invention
Line.As shown in figure 5, oxygen activation temporal profile data can be imported into matlab, oxygen activation time spectral curve is drawn, is occurred in figure
4 curves represent the oxygen activation time spectral curve that four gamma detectors detect.
Fig. 6 is a kind of oxygen activation time spectrum of Impulse Oxygen Activation Log auto-correlation means of interpretation of the embodiment of the present invention from phase
Close curve.As shown in fig. 6, the preferable curve of line morphology of setting a song to music 4 spectral curve total times oxygen activation time in Fig. 5 is chosen, to song
Line carries out auto-correlation computation, obtains autocorrelator trace.Wherein, auto-correlation function used is the function in sigtnal interval, is separated with
Positive and negative interval so the signal of n length, there is 2n-1 auto-correlation function value, describes the phase at unlike signal interval respectively
Like degree, and the 2n-1 auto-correlation function value is symmetrical on n, can explain analysis using MATLAB softwares, and select
Take n-1 data.
In figure 6, it is the transition time that the peak-peak corresponding time is chosen to autocorrelator trace, and the transition time refers to medium flow field
Reach the time of detector, i.e. T.The oxygen activation logging data that each detector detects have periodically, then it from phase
Closing function also has periodically, and the cycle is identical with the periodicity of oxygen activation logging data.Auto-correlation function provides one kind
The method for obtaining periodic signal period.On the integral multiple of periodic signal period, its auto-correlation function can reach maximum,
Therefore can be without considering initial time, and the position of first maximum from auto-correlation function calculates oxygen activation logging signal
Cycle.
Further say, in 4 oxygen activation time spectral curves of Fig. 5, first peak is neutron burst time spectral curve,
Second peak is the time spectral curve that detector detects, and selects the second minor peaks maximum or first in oxygen activation time spectral curve
Minor peaks carry out auto-correlation computation plus the oxygen activation time spectral curve of the second minor peaks summation maximum and obtain autocorrelator trace, i.e.,
It completes to choose the preferable curve of line morphology of setting a song to music 4 spectral curve total times oxygen activation time in Fig. 5.
In Figure 5, compared with weighted mean method, choose and measure peak value segment progress auto-correlation computation, and weighted mean method
It needs to choose more complete peak value and be calculated, in logging well at the scene, because of the situation that its scene is complicated, measure the difficulty for completing peak
It spends larger.Correlation method can carry out auto-correlation by peak fractions segment, and the species, concentration to injected media are all without shadow
It rings, the accuracy and repeatability of measurement are high.
Wherein, auto-correlation function thinks that how the correlation between any two value is with time interval in time series
And the auto-correlation functions changed feature the correlation between time series adjacent variable.The same function of time is in instant t and t+
Function of the average value of two of a value phase products as time delay t, after it is signal and postpones between signal similitude degree
Amount.When time delay is zero, then as the mean-square value of signal, its value is maximum at this time, and auto-correlation function is description random signal X
(t) in any two t at different moments1, t2Value between degree of correlation, the maximum of related coefficient represents this group of signal
Cycle.
Fig. 7 is that a kind of auto-correlation means of interpretation of Impulse Oxygen Activation Log auto-correlation means of interpretation of the embodiment of the present invention is intended
Close curve.As shown in fig. 7, calculate outflow using formula Q=VS.The speed V=L/T of water is understood by oxygen activation logging principle,
And known to the spacing L of detector.The relational graph that flow and calibrational capacity are calculated by Fig. 7 can be seen that oxygen activation logging is used from phase
Pass method result of calculation is more accurate.
Table 1 utilizes the above method, and autocorrelation method of the invention calculates the comparison of flow and calculated with weighted average method flow
Test table
Fig. 8 is getting under a kind of different flow of Impulse Oxygen Activation Log auto-correlation means of interpretation of the embodiment of the present invention
Time changing curve.As shown in figure 8, the polymer (that is, medium) of same flow various concentration is counted using the above method
It calculates.As in Fig. 3 in measuring technology service branch company inspection center 13m vertical analog wells injection of polymer, carry out indoor scale
Experiment, by the calibration to design discharge point, verifies this method.When being explained with auto-correlation means of interpretation, indoor scale
Polymer concentration selection in 500ppm, 1000ppm, 1500ppm, 2000ppm, 2500ppm, empirical tests autocorrelation method from
The influence of polymer viscosity, the different medium corresponding transition time under same flow is essentially identical (in Fig. 8), therefore auto-correlation
Method can be very good to carry out oxygen activation logging explanation to polymer displacement oil well.
Fig. 9 is a kind of schematic diagram of Impulse Oxygen Activation Log auto-correlation interpreting means of the embodiment of the present invention.Such as Fig. 9 institutes
Show, a kind of Impulse Oxygen Activation Log auto-correlation interpreting means A, including：Memory A1 and processor A2 and it is stored in memory A1
Computer program that is upper and being run on processor A2, computer program are a kind of above-mentioned Impulse Oxygen Activation Log auto-correlation solution
Method is released, processor A2 realizes following steps when performing program：
Step 101 draws oxygen activation time spectral curve according to oxygen activation logging temporal profile data；Step 102 lives to the oxygen
Change time spectral curve progress auto-correlation computation and obtain autocorrelator trace；Step 103 calculates the peak-peak of the autocorrelator trace
Point records the maximal peak point corresponding time as the transition time；Step 104 is according to the transition time and with source away from calculating
The flow velocity of the medium；Step 105 obtains the flow of the medium according to the cross-sectional area of the flow velocity and experiment tubing string.
The present invention services branch company test experience centre polymer 13m by Daqing oil field responsibility Co., Ltd measuring technology
Calibration curve verification explains that the experimental provision is examined and determine by national authority part, and precision meets country in vertical analog well room
Standard verification, the interior Calibration Experiment comply fully with the requirement of correction new interpretation method.When being explained with the present invention, indoor scale gathers
The selection of object concentration is closed in 0ppm, 500ppm, 1000ppm, 1500ppm, 2000ppm, 2500ppm.The present invention logs well to scene
Data has carried out 50 mouthfuls of the comparison of the explanation with other methods.The present invention has been respectively adopted three pulsed oxygen activation technique instruments and has carried out in fact
Scale verification is tested, method repeatability uniformity all meets explanation demand.
Obviously, those skilled in the art should be understood that each unit of the above-mentioned present invention or each step can be with general
Computing device realize that they can concentrate on single computing device or be distributed in multiple computing devices compositions
On network, optionally, they can be realized with the program code that computing device can perform, it is thus possible to be stored in
They are either fabricated to each integrated circuit unit respectively or will be in them by computing device to perform in storage device
Multiple units or step be fabricated to single integrated circuit unit to realize.In this way, the present invention is not limited to any specific hard
Part and software combine.
Embodiment described above only expresses embodiments of the present invention, and description is more specific and detailed, but can not
Therefore it is interpreted as the limitation to the scope of the claims of the present invention.It should be pointed out that those skilled in the art,
On the premise of not departing from present inventive concept, several deformations, equal replacement can also be made, improved etc., these belong to the present invention
Protection domain.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (5)
1. a kind of Impulse Oxygen Activation Log auto-correlation means of interpretation, including：
Oxygen activation time spectral curve is drawn according to oxygen activation logging temporal profile data；
Auto-correlation computation is carried out to the oxygen activation time spectral curve and obtains autocorrelator trace；
The maximal peak point of the autocorrelator trace is calculated, records the maximal peak point corresponding time as the transition time；
According to the transition time and with source away from the flow velocity for calculating the medium；
The flow of the medium is obtained according to the cross-sectional area of the flow velocity and experiment tubing string.
2. a kind of Impulse Oxygen Activation Log auto-correlation means of interpretation according to claim 1, it is characterised in that：
Modal data between at least 2 sets of the oxygen activation logging temporal profile data demarcated under different flow is described, is composed between described
Data draw the oxygen activation time spectral curve respectively, select in the oxygen activation time spectral curve the second minor peaks maximum or
First minor peaks carry out auto-correlation computation plus the oxygen activation time spectral curve of the second minor peaks summation maximum and obtain from phase
Close curve.
3. a kind of Impulse Oxygen Activation Log auto-correlation means of interpretation according to claim 1, it is characterised in that：
Oxygen activation logging experiment is carried out, obtains the oxygen activation logging temporal profile data that medium is demarcated under different flow.
4. a kind of Impulse Oxygen Activation Log auto-correlation means of interpretation according to claim 3, it is characterised in that：
The oxygen activation logging experiment measures analog casing, simulation oil pipe and ring set respectively using Impulse Oxygen Activation Log instrument
The oxygen activation logging temporal profile data that the medium in space is demarcated under different flow；
Wherein, the ring set space is by the space with being formed on the outside of the simulation oil pipe on the inside of the analog casing.
5. a kind of Impulse Oxygen Activation Log auto-correlation interpreting means, which is characterized in that including：
Memory and processor and storage on a memory and the computer program that can run on a processor, the computer journey
Sequence is a kind of Impulse Oxygen Activation Log auto-correlation means of interpretation as described in any one of Claims 1 to 4, and the processor performs institute
Following steps are realized when stating program：
Oxygen activation time spectral curve is drawn according to oxygen activation logging temporal profile data；
Auto-correlation computation is carried out to the oxygen activation time spectral curve and obtains autocorrelator trace；
The maximal peak point of the autocorrelator trace is calculated, records the maximal peak point corresponding time as the transition time；
According to the transition time and with source away from the flow velocity for calculating the medium；
The flow of the medium is obtained according to the cross-sectional area of the flow velocity and experiment tubing string.
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