CN102759748B - The cross analysis Seismic Reservoir Prediction method that based target is analyzed - Google Patents
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Abstract
A kind of cross analysis Seismic Reservoir Prediction method that provides based target to analyze, comprise the following steps: original seismic data is carried out to property calculation or Inversion Calculation, to obtain the preparation data of earthquake class and the preparation data of well logging class for Seismic Reservoir Prediction; Log data is carried out to cross analysis, determine whether the Reservoir Section crossing on figure of log data has obvious characteristic; If determine that the Reservoir Section crossing on figure of log data has obvious characteristic, utilizes the parameter area and the existing data that obtain by log data cross analysis to determine predicting the outcome of rational Seismic Reservoir.
Description
Technical field
The present invention relates to geophysical exploration seismic data interpretation technical field, more particularly, relate to onePlant the cross analysis Seismic Reservoir Prediction method that based target is analyzed, this Seismic Reservoir Prediction method can be used forThe reservoir prediction of seismic data interpretation technology.
Background technology
In geophysical exploration technology, after obtaining geological data by conventional method, it is right to needGeological data makes an explanation, and generally need to carry out reservoir prediction and explain flow process. Explain flow process at reservoir predictionIn, need to analyze well-log information, seismic data is carried out to attributes extraction, seismic inversion etc. and be correlated withCalculate, then utilize various means (for example, cross analysis, multiattribute fusion, principal component analysis etc.)Carry out qualitative to original seismic data, well-log information, the attribute data that calculated by original seismic dataAnd quantitative analysis, identify reservoir possible growth region and interval, thereby complete reservoir prediction work.
Existing cross analysis method for predicting reservoir generally includes following steps:
Step 1: original seismic data is carried out to property calculation or Inversion Calculation, obtain the preparation of earthquake classData, calculate log, the preparation data of the class that obtains logging well;
Step 2: adopt log data to carry out cross analysis, the parameter area of delineation reservoir development mappingTo geological data, thereby draw a circle to approve out reservoir development interval and the region in whole work area, comprise following sub-stepRapid:
1, various log datas are carried out to cross analysis, utilize known drilling data, log data and formation testingData is comprehensively analyzed, and finds the various physical property characteristics of reservoir development section in the distribution crossing on figure;
2, utilize Reservoir Section physical parameter scope that log data cross analysis obtains to original earthquake data andSeismic attributes data mates screening, determines reservoir and may grow region in plane and space;
3, make the distribution situation map in reservoir plane, section and space.
Existing cross analysis reservoir prediction technique is more effective for the significantly simple reservoir of feature, works asThe reservoir characteristic crossing on figure can be with region response characteristic reaction independently out, can on figure, enclose crossingWhile making response characteristic parameters scope, can on corresponding seismic attributes data, draw a circle to approve out characteristic areaDistribution; But for the complicated reservoirs without obvious characteristic on the figure that crosses, the method just cannot complete storageLayer prediction work.
In existing cross analysis reservoir prediction technique, the direction of analysis is unidirectional, if stored upLayer predicts the outcome dissatisfied, needs the parameter area that crosses that makes repeated attempts, and relatively blindly, ginseng crosses in operationThe selection of number and mapping result do not have corresponding relation intuitively, and this has just increased the workload of analyzing greatly,And be difficult to obtain satisfied result.
Summary of the invention
The object of the invention is to overcome above and other shortcoming in the prior art. For this reason, the present inventionEmbodiment a kind of provide based target to analyze cross analysis Seismic Reservoir Prediction method.
According to an aspect of the present invention, the cross analysis Seismic Reservoir that provides a kind of based target to analyze is pre-Survey method can comprise the steps: original seismic data to carry out property calculation or Inversion Calculation, to obtainTake the preparation data of earthquake class and the preparation data of well logging class in Seismic Reservoir Prediction; To log dataCarry out cross analysis, determine whether the Reservoir Section crossing on figure of log data has obvious characteristic; IfThe Reservoir Section crossing on figure of determining log data has obvious characteristic, utilizes by log data and crossesThe parameter area that analysis obtains and existing data are determined predicting the outcome of rational Seismic Reservoir.
According to an aspect of the present invention, the cross analysis Seismic Reservoir Prediction method that based target is analyzed also canComprise: if determine that the Reservoir Section crossing on figure of log data does not have obvious characteristic, according to existingData is drawn a circle to approve possible estimation range in seismic profile and earthquake plane, and estimation range based on possiblePredict reasonably and predict the outcome in the correction of cross mapping on figure and the existing data of log data.
According to an aspect of the present invention, if determine whether the Reservoir Section crossing on figure of log data hasObvious characteristic, can carry out following steps: the parameter area of determining reservoir development interval; Utilize described ginsengNumber scope is mated filtration to seismic attributes data, obtains preliminary predicting the outcome; Utilize existing dataAnalyze preliminary predict the outcome whether reasonable, if rationally, reasonably predicted the outcome, if unreasonable,In seismic profile and earthquake plane, draw a circle to approve out a possible estimation range according to existing data; To draw a circle to approvePossible estimation range reflection be mapped to crossing on figure of log data, obtain new reservoir development intervalParameter area, utilizes the parameter situation of known log data and known reservoir to adjust new parameter areaWhole, the new parameter area after adjusting is applied to seismic attributes data to mate filtration, obtain newPredict the outcome, judge and new whether rationally predict the outcome by existing data, if rationally, it is reasonable to obtainPredict the outcome, if unreasonable, described in revising in seismic profile and earthquake plane according to existing dataPossible estimation range, repeats this step, until reasonably predicted the outcome.
According to the present invention, existing data is in existing drilling well, well logging, well logging, oil test dataOr multiple.
According to an aspect of the present invention, seismic data attribute calculate or the type of Inversion Calculation should with well logging numberConsistent according to the type of calculating.
According to an aspect of the present invention, the parameter area of the figure that crosses of log data is by tetra-of x, y, z, cThe scope of the value of axle limits, and wherein x, y, z, c are respectively x axle, y axle, the z during three-dimensional crossesAxle and color component.
According to an aspect of the present invention, utilize the borehole log data of individual well or many mouthfuls of wells to come according to the timeUniformity is carried out cross analysis, and the minimum number of borehole log data is 2, mostly is 4 most.
According to an aspect of the present invention, in the time adopting the borehole log data of many mouthfuls of wells to carry out cross analysis,Consider coupling and the circumscription relation of the borehole log data of each well.
According to an aspect of the present invention, according to seismic horizon or time control, seismic attributes data was matedThe scope of filter.
The cross analysis Seismic Reservoir Prediction method of analyzing according to based target of the present invention can be more quickObtain that precision is higher, scope reservoir prediction result more accurately. User in use operates moreEasy directly perceived, purpose is strong.
Brief description of the drawings
By the description of carrying out below in conjunction with the accompanying drawing that embodiment is exemplarily shown, of the present invention above-mentioned andOther objects and feature will become apparent, wherein:
Fig. 1 illustrates the cross analysis Seismic Reservoir Prediction of analyzing according to the based target of the embodiment of the present inventionThe flow chart of method.
Fig. 2 illustrates according to the cross analysis Seismic Reservoir Prediction method of the embodiment of the present invention at logThe figure that crosses on the flow chart of performed operation while thering is obvious characteristic.
Fig. 3 illustrates according to the cross analysis Seismic Reservoir Prediction method of the embodiment of the present invention at logThe figure that crosses on the flow chart of performed operation while not thering is obvious characteristic.
Detailed description of the invention
Describe below with reference to accompanying drawings the cross analysis earthquake storage of analyzing according to based target of the present invention in detailThe embodiment of layer prediction method.
Fig. 1 illustrates the cross analysis Seismic Reservoir Prediction method analyzed according to based target of the present inventionFlow chart.
First,, in step 101, prepare the data for Seismic Reservoir Prediction. Can adopt the whole bag of tricksCarry out ground observation collection, to obtain the data of acquired original. Then, by seismic data processing,To post-stack seismic data. In addition, can obtain original log data according to various drilling wells, logging method,Then pass through log data processing, explanation, obtain the log data that can explain for physical prospecting. In addition,Can adopt the methods such as seismic properties extraction, seismic inversion calculating to process geological data, obtain newSeismic attributes data body, carries out property calculation to log data, obtains various attribute curves.
It should be noted that, in the data of step 101 are prepared to calculate, seismic data attribute is calculated or is anti-The type of drilling calculating should be consistent with the type that log data is calculated. For example,, if utilize geological data meterCalculated reflectance factor, elastic impedance, Poisson's ratio parameter, log data also should be calculated reflectance factor, bulletProperty impedance, Poisson's ratio parameter, this is because need log data and earthquake in carrying out cross analysisData type is corresponding one by one.
Next,, in step 103, log data is carried out to cross analysis to obtain crossing of logFigure.
In step 105, determine whether the Reservoir Section crossing on figure of log data has obvious characteristic.
Geological data can comprise multiple seismic channels. Each seismic channel can comprise multiple sampled points. Respectively adoptSampling point can the corresponding different time, and log data comprises many logs, here, supposes in work areaHave more than one mouthful of drilling well, and log runs through whole interval of interest, and the depth-sampling of log withM-depth relationship pairing when the time sampling of geological data has completed. That is to say, log alsoCan regard the data of time-domain as. In this case, crossing of log data can be passed through time correspondenceRelationship map is to seismic profile.
Utilize some borehole log datas (maximum 4 curves, minimum 2 of individual well or many mouthfuls of wellsCurve) each sampled point, carry out cross analysis according to time consistency. Hand over when adopting many mouthfuls of well dataWhen remittance, also need to consider coupling and the circumscription relation of each well curve, the quality of coupling directly has influence onThe correctness of the result that crosses.
According to of the present invention to the cross analysis of log data in, adopt geology layering or seismic horizon to enterRow log circumscription and coupling. The method of coupling is as benchmark, to log well ground using certain a bite wellMatter layering or seismic horizon limiting time or depth-sampling scope, the curvature correction resampling of other wells is to baseAccurate well scope, then includes the calculating that crosses in.
For example, if adopt 3 mouthfuls of wells to participate in cross analysis, and hypothesis is used the speed data body of 3 mouthfuls of wells(AC), p-wave impedance data volume (P-IMP), density data body (DEN), S-wave impedance data volume (S-IMP)These four logs, destination layer section is positioned between logging geological layering Top1 and Top2, first by BAC, the P-IMP of well and C well, DEN, tetra-logs of S-IMP are according to the Top1 of A well, Top2Between number of samples and sample rate carry out resampling, by AC, the P-IMP of the B well newly obtaining, C well,The corresponding log of DEN, tetra-logs of S-IMP and A well merges, i.e. A wellEach sampled point between Top1, the Top2 of AC, P-IMP, DEN, tetra-logs of S-IMPHave 3 values, these 4 curves are crossed, the statistical property of the result that crosses obtaining is better.
Then, AC, P-IMP, DEN, the S-IMP to the Reservoir Section of 3 mouthfuls of wells between Top1 and Top2Article four, the numeric distribution scope of log is added up, to determine the Reservoir Section crossing on figure of log dataWhether there is obvious characteristic. The result of as if statistics is that AC is distributed between a1-a2, and P-IMP is distributed inBetween p1-p2, DEN is distributed between d1-d2, and S-IMP is distributed between s1-s2, can crossOn figure, draw a circle to approve a region (polygon or polyhedron) according to this scope.
If determine to there is obvious characteristic in step 105, in step 107, can utilize cross analysis to obtainTo parameter area and existing data obtain reasonably predicting the outcome of reservoir development layer.
Otherwise, if determine that in step 105 Reservoir Section crossing on figure of log data does not have obvious spyLevy, can only obtain reasonably predicting the outcome of reservoir development layer by existing data in step 109.
The parameter area of the figure that crosses of log data is limited by the scope of the value of x, y, z, tetra-axles of c,Wherein x, y, z, c are respectively x axle, y axle, z axle and the color components during three-dimensional crosses. ColorThe identification of component is to differentiate according to the rgb value of computer plane demonstration luminous point. Due to color valueThere is certain error, in practical application, need to provide error threshold, generally get 5%.
Below with reference to Fig. 2, the cross analysis Seismic Reservoir Prediction method according to the embodiment of the present invention is describedPerformed operation there is obvious characteristic on the figure that crosses of log time.
First,, in step 201, determine the parameter area of reservoir development interval.
Then, in step 203, utilize the parameter area obtaining to mate filtration to seismic attributes data,Obtain preliminary predicting the outcome. That is to say, the parameter area of the figure that crosses of log is mapped to groundShake section and plane. The parameter area of the figure that crosses of log is being mapped in seismic profile and planeTime, need to control the scope that Data Matching is filtered according to seismic horizon or time, instead of to whole numberShine upon according to body.
Cross figure to seismic data mapping with function representation as shown in Equation 1 from well logging.
Formula 1
In formula 1, x, y, z, c represent four kinds of different well loggings or seismic properties, and t is the time, a,B is the coordinate of geological data. P (x, y, z, c) is mapping function.
Next, in step 205, whether predicting the outcome that the existing analysis of utilization is preliminary be reasonable, ifRationally, reasonably predicted the outcome. If according to preliminary the predicting the outcome of Analysis deterrmination of existing dataUnreasonable, in seismic profile and earthquake plane, draw a circle to approve out a possible estimation range according to existing data.Here, existing data in referring to data such as existing drilling well, well logging, well logging, formation testing orMultiple. The section of geological data and two dimensional analysis refer to adopt original earthquake data, seismic attributes data,Seismic inversion data, comprehensively analyze in mistake well profile, isochronous surface, the section of layer position, judge reservoirMay grow region, that is, and possible estimation range. In the present invention, do not need to find whole canThe reservoir development district of energy, only need to find typical several or 1 region.
Then,, in step 207, the possible estimation range reflection of delineation is mapped to crossing of log dataOn figure, obtain the parameter area of new reservoir development interval.
Cross figure mapping function expression from geological data to well logging as shown in Equation 2.
Formula 2
Can find out from formula 1 and formula 2, log crosses, and to be mapped to seismic data cube be multivalued mappings to figure,And the figure that crosses from seismic data cube to log is monodrome mapping.
Next,, in step 209, utilize the parameter situation of known log data and known reservoir to newParameter area is adjusted, and the new parameter area after adjusting is applied to seismic attributes data to carry outJoin filtration, obtain new predicting the outcome.
With step 205 similarly, in step 211, utilize existing data to judge new whether predicting the outcomeRationally, if rationally, reasonably predicted the outcome, if unreasonable, the existing data of basis is in earthquakeIn section and earthquake plane, revise possible estimation range.
Repeating step 207 to 211, until reasonably predicted the outcome.
Referring back to Fig. 1, if determine the not tool of the Reservoir Section crossing on figure of log data in step 103There is obvious characteristic, in seismic profile and earthquake plane, draw a circle to approve possible estimation range according to existing data,And estimation range based on possible is come pre-in cross mapping on figure and the correction of existing data of log dataSurvey and reasonably predict the outcome. For example,, if the Reservoir Section log numerical statistic between Top1, Top2Result is relatively disperseed, need to from corresponding speed data body (AC), the p-wave impedance of geological dataThe well excessively of data volume (P-IMP), density data body (DEN) and S-wave impedance data volume (S-IMP)Section is analyzed, and analyzes the storage of well profile according to given datas such as drilling geology report, well log interpretationsLayer development position in conjunction with AC, P-IMP, DEN and S-IMP, tracks out reservoir on seismic profileCross direction profiles scope, draws a circle to approve out with polygon, is then mapped to log data and crosses on figure (with earthquakeThe data borehole log data of the same type figure that crosses), the number of mapping process to draw a circle to approve in seismic properties polygonThe value of value point is as the figure reference value that crosses.
Fig. 3 illustrates according to the cross analysis Seismic Reservoir Prediction method of the embodiment of the present invention at logThe flow chart of performed operation while not having obvious characteristic on figure crosses.
First,, in step 301, in seismic profile and earthquake plane, draw a circle to approve out one according to existing dataPossible estimation range. Step 301 is similar with the step 205 of Fig. 3.
Next, in step 303, adopt the log data corresponding with seismic properties to carry out cross analysis,The possible estimation range that step 301 is obtained is mapped to crossing on figure of log data, to obtain reservoirGrow the possible parameter area of interval;
Then,, in step 305, use the possible parameter area obtaining in step 303 to seismic propertiesData are mated filtration, obtain preliminary predicting the outcome.
In step 307, utilize existing data judge preliminary predict the outcome whether reasonable, if reasonable,Reasonably predicted the outcome, if unreasonable, the existing data of basis is in seismic profile and earthquake planeRevise described possible estimation range;
Next, in step 309, the estimation range of correction is mapped to log data and crosses on figure,To the parameter area of new reservoir development interval.
In step 311, utilize the parameter situation of known log data and known reservoir to new parameter areaAdjust, the new parameter area after adjusting is applied to seismic attributes data and mates filtration,To new predicting the outcome.
Then, in step 313, utilize existing data judge new predict the outcome whether reasonable, if reasonable,Reasonably predicted the outcome, if unreasonable, the existing data of basis is in seismic profile and earthquake planeThe described possible estimation range of upper correction, and repeatedly perform step 309 to 313, until obtain reasonablyTill predicting the outcome.
The invention has the advantages that, in the time that the initial range of multivalued mappings cannot be determined, can reflect with monodromePenetrate the initial value scope of delineation multivalued mappings, by the phase of multiple monodrome mapping scopes and multivalued mappings scopeIntermodulation is whole, obtains final mapping result.
Complete after the cross analysis reservoir prediction of above-mentioned 4 kinds of data based on target analysis, according to enforcementThe cross analysis method for predicting reservoir of the based target analysis of example can also adopt more kinds of attribute datas to carry outCross analysis reservoir prediction, comprehensively analyzes the result obtaining, and determines final reservoir prediction result,Can make to predict the outcome more identical with actual conditions.
Although illustrate and described the present invention with reference to some exemplary embodiments of the present invention, thisThe technical staff in field will understand, in the spirit of the present invention that does not depart from claim and equivalent restriction thereofIn the situation of scope, can make in form and details various changes.
Claims (6)
1. the cross analysis Seismic Reservoir Prediction method that based target is analyzed, comprises the following steps:
(a) original seismic data is carried out to property calculation or Inversion Calculation, to obtain for Seismic Reservoir PredictionEarthquake class preparation data and well logging class preparation data;
(b) log data is carried out to cross analysis, determine the whether tool of the Reservoir Section crossing on figure of log dataThere is obvious characteristic;
(c) if determine that in step (b) Reservoir Section crossing on figure of log data has obvious characteristic, profitDetermine rational Seismic Reservoir by the parameter area obtaining by log data cross analysis and existing dataPredict the outcome;
(d) if determine that in step (b) Reservoir Section crossing on figure of log data does not have obvious characteristic,In seismic profile and earthquake plane, draw a circle to approve possible estimation range according to existing data, and based on possibleEstimation range is predicted rational prediction in cross mapping on figure and the correction of existing data of log dataAs a result,
Wherein, the parameter area of the figure that crosses of log data is entered by the scope of the value of x, y, z, tetra-axles of cRow limits, and wherein x, y, z, c are respectively x axle, y axle, z axle component and the face during three-dimensional crossesColouring component,
Wherein, step (c) comprising:
(c1) determine the parameter area of reservoir development interval;
(c2) utilize described parameter area to mate filtration to seismic attributes data, obtain preliminary predictionResult;
(c3) whether predicting the outcome that the existing analysis of utilization is preliminary be reasonable, if rationally, obtains rationallyPredict the outcome, if unreasonable, in seismic profile and earthquake plane, draw a circle to approve out one according to existing dataPossible estimation range;
(c4) the possible estimation range reflection of delineation is mapped to crossing on figure of log data, obtains newThe parameter area of reservoir development interval;
(c5) utilize the parameter situation of known log data and known reservoir to adjust new parameter areaWhole, the new parameter area after adjusting is applied to seismic attributes data to mate filtration, obtain newPredict the outcome;
(c6) utilize existing data judge and new whether rationally predict the outcome, if rationally, obtain rationalPredict the outcome, if unreasonable, can described in revising in seismic profile and earthquake plane according to existing dataThe estimation range of energy;
(c7) repeating step (c4)-(c6), until reasonably predicted the outcome;
Wherein, step (d) comprising:
(d1) in seismic profile and earthquake plane, draw a circle to approve out a possible prediction model according to existing dataEnclose;
(d2) adopt the log data corresponding with seismic properties to carry out cross analysis, by described possible predictionRange mappings crosses on figure to log data, to obtain the possible parameter area of reservoir development interval;
(d3) use described possible parameter area to mate filtration to seismic attributes data, obtain preliminaryPredict the outcome;
(d4) utilize existing data judge and describedly preliminary whether rationally predict the outcome, if reasonable, obtainReasonably predict the outcome, if unreasonable, revise in seismic profile and earthquake plane according to existing dataDescribed possible estimation range;
(d5) estimation range of correction is mapped to log data and crosses on figure, obtain new reservoir development layerThe parameter area of section;
(d6) utilize the parameter situation of known log data and known reservoir to adjust new parameter areaWhole, the new parameter area after adjusting is applied to seismic attributes data and mates filtration, obtain newPredict the outcome;
(d7) utilize existing data judge and new whether rationally predict the outcome, if rationally, obtain rationalPredict the outcome, if unreasonable, can described in revising in seismic profile and earthquake plane according to existing dataThe estimation range of energy;
(d8) execution step (d5) arrives (d7) repeatedly, until reasonably predicted the outcome.
2. cross analysis Seismic Reservoir Prediction method as claimed in claim 1, wherein, existing data isOne or more in existing drilling well, well logging, well logging, oil test data.
3. cross analysis Seismic Reservoir Prediction method as claimed in claim 1, wherein, in step (a)Seismic data attribute calculate or the type of Inversion Calculation should be consistent with the type that log data is calculated.
4. cross analysis Seismic Reservoir Prediction method as claimed in claim 1, wherein, step (b) profitCarry out cross analysis according to time consistency with the borehole log data of individual well or many mouthfuls of wells, well logging is bentThe minimum number of line data is 2, mostly is 4 most.
5. cross analysis Seismic Reservoir Prediction method as claimed in claim 4, wherein, when adopting many mouthfulsWhen the borehole log data of well carries out cross analysis, consider coupling and the model of the borehole log data of each wellEnclose qualified relation.
6. cross analysis Seismic Reservoir Prediction method as claimed in claim 1, wherein, according to earthquake layerPosition or time are controlled the scope that seismic attributes data coupling is filtered.
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