CN105158803B - A kind of method of selection advantage reservoir - Google Patents
A kind of method of selection advantage reservoir Download PDFInfo
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- CN105158803B CN105158803B CN201510444735.8A CN201510444735A CN105158803B CN 105158803 B CN105158803 B CN 105158803B CN 201510444735 A CN201510444735 A CN 201510444735A CN 105158803 B CN105158803 B CN 105158803B
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Abstract
The embodiment of the present application discloses a kind of method of selection advantage reservoir.This method includes：Obtain interval transit time curve, deep lateral resistivity curve and the shallow lateral resistivity curve of sample well in work area；According to the interval transit time curve, deep lateral resistivity curve and shallow lateral resistivity curve product linearity curve；According to the physical property curve, physical parameter codomain is determined；The geological data in the work area is obtained, geostatistical inversion is carried out to the geological data, physical parameter data volume is obtained；Advantage reservoir is chosen according to the physical parameter codomain and the physical parameter data volume.The method of the selection advantage reservoir of the embodiment of the present application, can improve the accuracy rate that advantage reservoir is chosen in reservoir.
Description
Technical field
The application is related to oil exploration technology field, more particularly to a kind of method of selection advantage reservoir.
Background technology
The physical parameter of reservoir generally comprises the parameters such as porosity and permeability.When the physical parameter of reservoir is higher, one
As the reservoir be called advantage reservoir.The quantity of storage oil gas and the production capacity of oil gas are generally all higher in advantage reservoir.Therefore, in oil
During gas exploration and exploitation, it usually needs choose and advantage reservoir is chosen from the reservoir in work area.
In the prior art, the method for choosing advantage reservoir is generally as follows：
The interval transit time curve of a certain drilling well in the seismic data in acquisition work area and the work area；Pass through the interval transit time
Curve carries out wave impedance inversion to the seismic data, to generate the wave impedance inversion data volume in work area；Pass through the wave impedance
Data volume is predicted to the physical parameter of reservoir, and therefrom chooses advantage reservoir.
During the application is realized, inventor has found that at least there are the following problems in the prior art：
Interval transit time curve can only typically reflect the porosity parameter of reservoir, can not comprehensively reflect the physical property of reservoir
Parameter, such as Permeability Parameters.The resolution ratio of seismic data cube, prediction essence of the interval transit time curve to reservoir are limited to simultaneously
Degree is relatively low.Therefore the accuracy rate that above-mentioned method advantage reservoir of the prior art is chosen is not high, it is impossible to well in reservoir
The good advantage reservoir of physical property is predicted.
The content of the invention
The purpose of the embodiment of the present application is to provide a kind of method of selection advantage reservoir, is selected with improving advantage reservoir in reservoir
The accuracy rate taken.
It is realized in order to solve the above technical problems, the embodiment of the present application provides a kind of method of selection advantage reservoir
's：
A kind of method of selection advantage reservoir, including：
Obtain interval transit time curve, deep lateral resistivity curve and the shallow lateral resistivity curve of sample well in work area；
Based on the interval transit time curve, deep lateral resistivity curve and shallow lateral resistivity curve, pass through formulaProduct linearity curve, wherein, Ac is the sound wave of interval transit time curve
Time difference value, Rlld is the deep lateral resistivity value of deep lateral resistivity curve, and Rlls is the shallow lateral of shallow lateral resistivity curve
Resistivity value, max (Ac) is the maximum of interval transit time in interval transit time curve, and min (Ac) is sound wave in interval transit time curve
The minimum value of the time difference, n is the profile amplitude index of interval transit time curve；
According to the physical property curve, physical parameter codomain is determined；
The geological data in the work area is obtained, geostatistical inversion is carried out to the geological data, physical parameter is obtained
Data volume；
Advantage reservoir is chosen according to the physical parameter codomain and the physical parameter data volume.
The technical scheme provided from above the embodiment of the present application, the method that the embodiment of the present application chooses advantage reservoir,
Physical property curve is reconstructed based on interval transit time curve, deep lateral resistivity curve and shallow lateral resistivity curve, weight is then based on
The physical property curve and geostatistical inversion of structure, choose to the reservoir in work area.Compared with prior art, due to the physical property
Curve can comprehensively reflect the physical parameters such as the porosity and permeability of reservoir, therefore the selection advantage storage of the embodiment of the present application
The method of layer, can improve the accuracy rate that advantage reservoir in reservoir is chosen, being capable of the advantage storage good to physical property in reservoir well
Layer is predicted.
Brief description of the drawings
, below will be to embodiment or existing in order to illustrate more clearly of the embodiment of the present application or technical scheme of the prior art
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments described in application, for those of ordinary skill in the art, are not paying the premise of creative labor
Under, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the flow chart that the embodiment of the present application chooses advantage reservoir method；
Fig. 2 is the embodiment of the present application physical property tracing analysis figure；
Fig. 3 is the figure that crosses of the embodiment of the present application physical property curve and deep lateral resistivity curve；
Fig. 4 is the planar distribution figure that the application implements reservoir；
Fig. 5 is the Profile Correlation figure that the application implements physical property curve geostatistical inversion and conventional wave impedance inversion.
Embodiment
In order that those skilled in the art more fully understand the technical scheme in the application, it is real below in conjunction with the application
The accompanying drawing in example is applied, the technical scheme in the embodiment of the present application is clearly and completely described, it is clear that described implementation
Example only some embodiments of the present application, rather than whole embodiments.Based on the embodiment in the application, this area is common
The every other embodiment that technical staff is obtained under the premise of creative work is not made, should all belong to the application protection
Scope.
A kind of method for selection advantage reservoir that the embodiment of the present application is provided, as shown in figure 1, including：
S101：Obtain the interval transit time curve of sample well in work area, deep lateral resistivity curve and shallow lateral resistivity bent
Line.
The work area is generally the position for carrying out seismic prospecting.The quantity of the sample well can be 1 or many
It is individual.
The acquisition process of log data is carried out to the sample well in a manner well, so as to obtain well logging number
According to.Such as can carry out acoustic logging, resistivity logging to sample well.Then the log data is analyzed and processed,
The interval transit time curve, deep lateral resistivity curve and shallow lateral resistivity curve of the sample well can be obtained.Wherein, sound wave
What deviation curve typically reflected is corresponding relation of the depth with interval transit time value of sample well, and deep lateral resistivity curve is typically anti-
What is reflected is corresponding relation of the depth with deep lateral resistivity value of sample well, and what shallow lateral resistivity curve typically reflected is sample
The depth of well and the corresponding relation of shallow lateral resistivity value.
S102：Based on the interval transit time curve, deep lateral resistivity curve and shallow lateral resistivity curve, pass through formulaProduct linearity curve.
In step S102, Ac is the interval transit time value of interval transit time curve, and Rlld is the deep side of deep lateral resistivity curve
To resistivity value, Rlls is the shallow lateral resistivity value of shallow lateral resistivity curve, and max (Ac) is sound wave in interval transit time curve
The maximum of the time difference, min (Ac) is the minimum value of interval transit time in interval transit time curve, and n is the Curve Amplitude of interval transit time curve
Spend index.
Usually, interval transit time curve can be used for the porosity parameter for reflecting reservoir, deep lateral resistivity curve and shallow
Lateral resistivity curve can be used for the permeability parameter for reflecting reservoir.Therefore, according to interval transit time curve, deep lateral resistivity
Curve and the physical property curve of shallow lateral resistivity curve generation, the porosity parameter and permeability ginseng of reservoir can be reflected simultaneously
Number.
Specifically, such a way product linearity curve can be passed through：
First obtain interval transit time curve profile amplitude index and the interval transit time curve in interval transit time most
Big value and minimum value.Wherein, the profile amplitude index can flexibly be determined according to the actual conditions of reservoir in work area, its value
Size is mainly influenceed by the factor such as lithology, formation thickness and fluid properties in work area, typically between 0-5.For coarse size,
The reservoir of good penetrability, profile amplitude index can be larger with value, and such as 4.For the bad reservoir of fine size, permeability,
Profile amplitude index can be smaller with value, and such as 2.Typically, for the sample well in same work area, profile amplitude index
Size is identical.
Then the depth of sample well is obtained, the data point of the sample well is determined according to the depth.For example, when sample well
When depth is 1000m, data point can be determined by interval of 1m, so as to generate 1000 data points.For each data point, root
The interval transit time value of the data point is obtained according to interval transit time curve, according to the deep side of the deep lateral resistivity curve acquisition data point
To resistivity value, the shallow lateral resistivity value of the data point is obtained according to shallow lateral resistivity curve, then passes through formulaThe physical parameter value of the data point is calculated, wherein, Ac is data point
Interval transit time value, Rlld be data point deep lateral resistivity value, Rlls be data point shallow lateral resistivity value, max
(Ac) it is the maximum of interval transit time curve, min (Ac) is the minimum value of interval transit time curve, n is the width of interval transit time curve
Spend index.The first half of the formula can reflect the porosity parameter of reservoir, and latter half can reflect the permeability of reservoir
Parameter.Physical parameter can be regarded as the product of porosity parameter and Permeability Parameters.Therefore when porosity and permeability are all
During high level, reservoir properties are the most superior.
Finally according to the physical parameter value of each data point of sample well, product linearity curve.For example, according to sample well each
The physical parameter value of data point, can use the method product linearity curve of curve matching.
As shown in Fig. 2 being the physical property tracing analysis figure in a certain depth bounds of sample well.Wherein, the ordinate in left side is
The depth bounds of sample well, middle curve is respectively the interval transit time curve and Rlld of sample well and Rlls difference song
Line, right side is the physical property curve generated according to interval transit time curve and Rlld and Rlls difference curve.In Fig. 2, lithology is
Sample well is in the rock property of different depth, and the part between two dotted lines represents the higher region of physical property parameter value.
S103：According to the physical property curve of the sample well, physical parameter codomain is determined.
Specifically, physical property curve can reflect the physical parameter of reservoir.Deep lateral resistivity curve can reflect reservoir
Permeability parameter.Permeability parameter is relevant typically with the oil-gas possibility of reservoir.It therefore, it can the physical property curve and depth to sample well
Lateral resistivity curve carries out cross analysis, so as to obtain the codomain of physical parameter.
Further, during cross analysis is carried out to the physical property curve of sample well and deep lateral resistivity curve,
Physical parameter value and deep lateral resistivity value all higher reservoirs can be chosen as target reservoir, the physical property of target reservoir is joined
Number span is used as physical parameter codomain.For example, being handed in physical property curve and deep lateral resistivity curve to sample well
Converge during analysis, physical parameter value is more than first threshold and deep lateral resistivity value is more than the reservoir work of Second Threshold
For target reservoir.The size of the first threshold can be integrated according to the physical parameter value of each reservoir in sample well physical property curve
It is determined that, the size of the Second Threshold can be according to the deep lateral resistivity of each reservoir in sample well deep lateral resistivity curve
Value is comprehensive to be determined.
In some embodiments, cross analysis is carried out in physical property curve and deep lateral resistivity curve to sample well
During, the actual oily situation that can combine sample well chooses target reservoir, to increase the physical parameter codomain of determination
Accuracy.
In some embodiments, the quantity of sample well can be multiple.It is possible to which the physical property to each sample well is bent
Line and deep lateral resistivity curve carry out cross analysis, to choose the target reservoir of each sample well.Finally to each sample well
Target reservoir physical parameter span carry out comprehensive analysis, to determine physical parameter codomain.For example, can be by each sample
The common factor of the target reservoir physical parameter span of this well is used as physical parameter codomain.
As shown in figure 3, being physical property curve and the figure that crosses of deep lateral resistivity curve.In Fig. 3, abscissa is according to deep side
The deep lateral resistivity value obtained to resistivity curve, ordinate is the physical parameter value obtained according to physical property curve, and colour code is
Oil saturation.
S104：The geological data in work area is obtained, geostatistical inversion is carried out to the geological data, physical parameter is obtained
Data volume.
The geological data in work area can be obtained by field acquisition.Using the geological data as trend obligatory point, to institute
State physical parameter curve and carry out geostatistical inversion, obtain the physical parameter data volume of work area reservoir.
Specifically, following method can be used to carry out geostatistical inversion：
1) geological data in work area is obtained by field acquisition, trace gather data (such as common reflection point is obtained after treatment
Trace gather data).
2) set up random walk and randomly choose 1 seismic channel, the conditional probability density function of the seismic channel is carried out
Estimation.
3) according to Sampling, randomly select 1 value from the conditional probability distribution function, calculate reflectance factor, and and
Wavelet carries out convolution, to generate synthetic seismogram.
4) synthetic seismogram is contrasted with actual seismic road.If being closer to actual seismic road, receive the synthesis
Seismic channel, calculates and terminates, and turn to next seismic channel.If difference is more, the synthetic seismogram, repeat step are not received
3) and 4).
5) until having chosen all seismic channels, so as to obtain physical parameter data volume.
S105, advantage reservoir is chosen according to the physical parameter codomain and the physical parameter data volume.
Specifically, can corresponding reservoir be stored up as advantage on physical parameter data volume using physical parameter codomain in work area
Layer.
It is possible to further choose the region corresponding to the physical parameter codomain on physical parameter data volume, then
Layer position is carried out to the physical parameter data volume to explain, regard the reservoir corresponding to the region as advantage reservoir.
In some embodiments, after advantage reservoir is chosen, the sample point of the advantage reservoir of selection can be extracted, is passed through
The sample point generates the plan of advantage reservoir, and then determines according to the plan Distribution Pattern of advantage reservoir.
Fig. 4 is the planar distribution figure of advantage reservoir, wherein, the deeper region of color is the higher region of physical parameter value.
As shown in figure 5, carrying out geostatistical inversion and the side of the conventional wave impedance of application using physical property curve for certain work area
The comparison diagram of profile obtained by method progress geostatistical inversion.Fig. 5 top is that application physical property curve carries out geology system
Meter learns the profile that inverting is obtained, and bottom is that the method for the conventional wave impedance of application carries out the section that geostatistical inversion is obtained
Figure.Contain substantial amounts of oil shale and mud stone in the reservoir in the work area, oil shale is respectively provided with low-impedance feature with mud stone.Therefore from
As can be seen that conventional wave impedance inversion can not make a distinction mud stone with oil shale formation in Fig. 5, and physical property curve is applied to carry out
Inverting, can preferably identify oil shale advantage reservoir, so as to the Distribution Characteristics of oil shale advantage reservoir carry out compared with
Good prediction.
The method of the selection advantage reservoir of the embodiment of the present application, based on interval transit time curve, deep lateral resistivity curve and
Shallow lateral resistivity curve is reconstructed physical property curve, the physical property curve and geostatistical inversion of reconstruct is then based on, to work area
Reservoir chosen.Compared with prior art, because the physical property curve can comprehensively reflect the porosity of reservoir and ooze
The physical parameters such as saturating rate, therefore the method for the selection advantage reservoir of the embodiment of the present application, can improve advantage reservoir in reservoir and select
The accuracy rate taken, the advantage reservoir good to physical property in reservoir can be predicted well.
Although depicting the application by embodiment, it will be appreciated by the skilled addressee that the application have it is many deformation and
Change is without departing from spirit herein, it is desirable to which appended claim includes these deformations and changed without departing from the application's
Spirit.
Claims (5)
1. a kind of method of selection advantage reservoir, it is characterised in that including：
Obtain interval transit time curve, deep lateral resistivity curve and the shallow lateral resistivity curve of sample well in work area；
Based on the interval transit time curve, deep lateral resistivity curve and shallow lateral resistivity curve, pass through formulaProduct linearity curve, wherein, when Ac is the sound wave of interval transit time curve
Difference, Rlld is the deep lateral resistivity value of deep lateral resistivity curve, and Rlls is the shallow lateral electricity of shallow lateral resistivity curve
Values of resistivity, max (Ac) be interval transit time curve in interval transit time maximum, min (Ac) be interval transit time curve in sound wave when
The minimum value of difference, n is the profile amplitude index of interval transit time curve；
Cross analysis is carried out to the physical property curve and deep lateral resistivity curve, physical parameter codomain is determined；
The geological data in the work area is obtained, geostatistical inversion is carried out to the geological data, physical parameter data are obtained
Body；
The physical parameter codomain corresponding region on the physical parameter data volume is chosen, to the physical parameter data volume
Carry out layer position to explain, regard the corresponding reservoir in the region as advantage reservoir.
2. the method as described in claim 1, it is characterised in that described to be based on the interval transit time curve, deep lateral resistivity
Curve and shallow lateral resistivity curve, pass through formulaGenerate physical property bent
Line, is specifically included：
Obtain the maximum of interval transit time in the profile amplitude index and the interval transit time curve of the interval transit time curve
And minimum value；
The depth of sample well is obtained, data point is determined according to the depth；
For each data point, the interval transit time value of the data point is obtained according to interval transit time curve, according to deep lateral resistivity
The deep lateral resistivity value of the curve acquisition data point, the shallow lateral resistance of the data point is obtained according to shallow lateral resistivity curve
Rate value, during based on the interval transit time value, deep lateral resistivity value, shallow lateral resistivity value, profile amplitude index and sound wave
The maximum and minimum value of difference, pass through formulaCalculate the data point
Physical parameter value；
According to the physical parameter value of the data point, pass through the method product linearity curve of curve matching.
3. the method as described in claim 1, it is characterised in that to the physical property curve and the progress of deep lateral resistivity curve
During cross analysis, physical parameter value is more than first threshold and deep lateral resistivity value is more than the reservoir of Second Threshold
As target reservoir, the physical parameter span of target reservoir is regard as physical parameter codomain.
4. the method as described in claim 1, it is characterised in that the interval transit time curve of sample well, depth in the acquisition work area
Lateral resistivity curve and shallow lateral resistivity curve, are specifically included：
Acoustic logging is carried out to the sample well in work area, the interval transit time data of the sample well are obtained, and based on the sound wave
Data generate the interval transit time curve of the sample well；
Deep lateral resistivity well logging is carried out to the sample well, the deep lateral resistivity data of the sample well are obtained, and be based on
The deep lateral resistivity data generate the deep lateral resistivity curve of the sample well；
Shallow lateral resistivity logging is carried out to the sample well, the shallow lateral resistivity data of the sample well is obtained, and be based on
The shallow lateral resistivity data generates the shallow lateral resistivity curve of the sample well.
5. the method as described in claim 1, it is characterised in that after advantage reservoir is chosen, methods described also includes：
Sample point is chosen from the advantage reservoir of selection, the planar distribution figure of the advantage reservoir is generated by the sample point.
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| CN105785446A (en) * | 2016-03-17 | 2016-07-20 | 成都创源油气技术开发有限公司 | Oil shale earthquake identification and evaluation method |
| CN110568150B (en) * | 2019-04-28 | 2022-03-01 | 中国石油天然气股份有限公司 | Oil shale identification method and device |
| CN112983399B (en) * | 2021-02-04 | 2023-11-28 | 中国石油天然气股份有限公司 | Method, device and storage medium for acquiring bottom hole flow pressure depressurization speed |
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