CN108169817A - Hydrocarbon index inverting Fluid Identification Method is combined in well logging earthquake - Google Patents
Hydrocarbon index inverting Fluid Identification Method is combined in well logging earthquake Download PDFInfo
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Abstract
The invention discloses a kind of well logging earthquakes to combine hydrocarbon index inverting Fluid Identification Method, and its step are as follows：（1）Establish the relationship of hydrocarbon index and formation fluid property；（2）It is preferred that the fluid sensitive seismic properties to studying area；（3）Loading well logging hydrocarbon index curve and the fluid sensitive seismic properties preferably gone out carry out attribute optimization combination using multi-attribute analysis technology and parameter are preferred, establish more relations on attributes of interval of interest fluid sensitive seismic properties and well logging hydrocarbon index curve；（4）It is preferred that going out the preferable hydrocarbon index invertomer to well effect, predictor predicts the fluid level spread of target zone.This method utilizes the fitting of more attribution inversion technologies and inverting well logging hydrocarbon index curve, well logging gas logging curve constrained optimization combination seism data information can be passed through, the resolution ratio and prediction effect of earthquake fluid identification are improved, is particularly suitable for the identification of thin reservoir, low-porosity reservoir and air water intermediate zone.
Description
Technical field
The present invention relates to a kind of well logging-earthquake joint hydrocarbon index inverting Fluid Identification Methods, belong to oilfield prospecting developing
Seism processing explain field.
Background technology
Method currently used for earthquake fluid prediction mainly has frequency class seismic properties, attenuation by absorption class seismic properties, more
Wavelet decomposition, AVO attributive analysis, elastic impedance inversion, elastic parameter inversion etc..
The fluid for the methods of frequency class seismic properties, attenuation by absorption class seismic properties, multiple wavelet decompose, AVO attributive analysis
Identification, such as Publication No. CN104459777A, publication date discloses one kind for the Chinese patent literature on March 25th, 2015 and is based on
The method and system of the fluid identification of fluid modulus AVO invertings, the method includes：Acquire the pre-stack seismic of purpose reservoir
Data, well-log information and Geological Achievements data；The AVO approximate formulas of structure characterization fluid modulus；It is folded according to described
Preceding seismic data, well-log information, Geological Achievements data and the characterization fluid modulus AVO approximate formula equations carry
Take wavelet；Fluid modulus number is determined according to the Prestack seismic data, well-log information, Geological Achievements data and wavelet
According to body；The type of fluid in current reservoir pore space is identified according to the fluid modulus data volume.Using characterizing fluid body
The AVO approximate formulas of product module amount carry out AVO invertings and are estimated that fluid modulus parameter, avoid fluid identification illusion, carry
High reservoir pore space fluid type forecasting reliability.Using above patent document as the prior art of representative, mainly provided using earthquake
The information of material, resolution ratio is relatively low and is easily interfered by shale layer, poor for thin fluid identification of reservoir adaptability.
In actual production, well logging hydrocarbon index curve is typically used to fluid identification.Such as Publication No. CN105064987A,
Publication date discloses a kind of using with brill well logging Q parameters progress water layer identification for the Chinese patent literature on November 18th, 2015
Explanation evaluating method includes the following steps：A, target zone well logging engineering parameter and geologic parameter are compiled；B, well logging work is utilized
Journey parameter and geologic parameter calculate well logging Q parameter responses；C, it is mapped according to well logging Q parameters response；D, using differentiating plate
With brill identification of water bed developmental state.The invention plays timely, efficient, true, the quick advantage of well logging hydrocarbon value parameter interpretation while drilling,
Integrated use well logging engineering and geologic parameter, with brill identification of water bed developmental state.
But during practice, fluid identification, all face are individually carried out using seismic data or log data
Face the defects of recognition resolution is relatively low, and prediction effect is poor, in particular for thin reservoir, low-porosity reservoir and air water transition
The identification of band is even more so.
Invention content
The present invention is directed to it is existing for the above-mentioned prior art the defects of and deficiency, a kind of well logging earthquake integrated hydrocarbon is provided and is referred to
Number inverting Fluid Identification Method, this method can pass through record using the fitting of more attribution inversion technologies and inverting well logging hydrocarbon index curve
Gas well gas surveys curve constraint optimum organization seismic data information, improves the resolution ratio and prediction effect of earthquake fluid identification, especially
Suitable for the identification of thin reservoir, low-porosity reservoir and air water intermediate zone.
The present invention is realized by using following technical proposals：
Hydrocarbon index inverting Fluid Identification Method is combined in a kind of well logging earthquake, it is characterised in that step is as follows：
（1）The parameters such as when surveying and bore using the drilling fluid conductivity, temperature, gas of situ of drilling well comprehensive logging instrument record, calculate hydrocarbon
The well loggings hydrocarbon index curve such as index, heavy hydrocarbon index, the Fluid Sensitivity of comparative analysis difference curve establish hydrocarbon index and ground laminar flow
The relationship of volume property；
（2）It is preferably right with reference to well logging fluid interpretation results, well logging fluid interpretation results, test achievement according to geologic characteristics
Study the fluid sensitive seismic properties in area；
（3）Loading well logging hydrocarbon index curve and the fluid sensitive seismic properties preferably gone out, are carried out using multi-attribute analysis technology
Attribute optimization combines and parameter is preferred, establishes interval of interest fluid sensitive seismic properties and more attributes of well logging hydrocarbon index curve close
System；
（4）According to multiple more relations on attributes between the well logging hydrocarbon index curve and seismic data being fitted, it is finally inversed by different hydrocarbon
Exponent data body, analyze each inverting hydrocarbon index body to well effect, preferably go out the preferable hydrocarbon index invertomer to well effect, in advance
Survey the fluid level spread of body prediction target zone.
The hydrocarbon index refers to the hydrocarbonaceous amount of drilling fluid based on change rate when boring, including total hydrocarbon index and methane index.
The heavy hydrocarbon index refers to heavy constituent in addition to methane and ethane with methane content ratio based on variation when boring
Rate.
Described pair research area's fluid sensitive seismic properties mainly include frequency class seismic properties, attenuation class seismic properties and
Amplitude class seismic properties.
The step（3）In, the influence of multi-attribute analysis process rejecting abnormalities value.To improve inverting correlation.
The step（3）In, since multi-attribute analysis has certain randomness, different set of properties component correlation differences compared with
It is small, therefore the process can establish multiple more relations on attributes.
Compared with prior art, what the present invention was reached has the beneficial effect that：
1st, the present invention combines well logging hydrocarbon index curve, seismic properties, carries out more attribution inversions using Logging curve constraint, obtains
High resolution, fluid identification prediction effect good seismic inversion data volume.When this method is used for thin fluid identification of reservoir, relatively
Have more preferably using seismic properties merely, also solve the insoluble air water intermediate zone fluid of some other methods in practical application
Identification problem.This method has broad application prospects in thin reservoir, air water intermediate zone fluid identification.
2nd, log data, seismic data are combined carry out fluid identification of reservoir by the present invention, enhance seismic properties
Application in fluid identification, but also log data has more wide application prospect in reservoir exploration and development.
Description of the drawings
Below in conjunction with specification drawings and specific embodiments, the present invention is described in further detail, wherein：
Fig. 1 is the flow diagram of the present invention；
Fig. 2 is MX203 wells Temple of the Dragon King group logging explanation figure；
Fig. 3 is the related figure of the more attribute fittings of well logging total hydrocarbon index；
Fig. 4-7 is mill small stream area Temple of the Dragon King group total hydrocarbon index inverting section.
Fig. 8 is Reservoir Section total hydrocarbon exponential forecasting plan view under the Temple of the Dragon King of mill small stream area.
Specific embodiment
Embodiment 1
As the better embodiment of the present invention, it discloses a kind of well logging earthquake joint hydrocarbon index inverting fluid identification sides
Method improves seismic data fluid identification effect using log data constraint：Well logging gas logging curve has for thin reservoir, low hole
The advantages of porosity reservoir, good air water intermediate zone fluid identification effect, proposes the fluid identification that a kind of well logging, seismic data combine
Method, it is therefore intended that using well logging gas logging curve constrain improve seismic data for low-porosity reservoir, thin reservoir and fluid
The resolution ratio and prediction effect of identification.
It is constrained by well logging gas logging curve and carries out seismic inversion, predicting reservoir fluid properties, flow includes：
（1）The parameters such as when surveying and bore using the drilling fluid conductivity, temperature, gas of situ of drilling well comprehensive logging instrument record, calculate hydrocarbon
Index（Change rate when the hydrocarbonaceous amount of drilling fluid is based on boring, including total hydrocarbon index, methane index）, heavy hydrocarbon index（Except methane and ethane
Outer heavy constituent is with methane content ratio based on change rate when boring）Wait Logging curves, the stream of comparative analysis difference Logging curve
Body sensibility establishes its relationship with formation fluid property.
（2）According to geologic characteristics, the seismic properties to studying area's fluid sensitive are targetedly screened, attribute is preferred
When pay the utmost attention to theoretically some frequency class seismic properties for water saturation sensitivity or seismic properties combination, such as instantaneously
Frequency-frequency decay.
（3）Loading well logging hydrocarbon index curve and the fluid sensitive seismic properties preferably gone out, utilize more attribution inversion methods
Preferred attribute combines and parameter, establishes the relationship of interval of interest fluid sensitive seismic properties and hydrocarbon index curve, more attribute fittings
When should be noted that the influence of rejecting abnormalities value as possible, to obtain accurate fit correlation.Since more attribution inversions have certain randomness,
More attribution inversion processes generally require to establish multiple fit correlations.
（4）According to the seismic properties being fitted and hydrocarbon index curved line relation, it is finally inversed by the hydrocarbon index body in research area, analysis point
Analyse multiple inverting hydrocarbon index bodies to well effect, preferably go out the preferable hydrocarbon index invertomer to well effect, predictor prediction purpose
The fluid level spread of layer.
Embodiment 2
Concrete application example as the present invention：Small stream area Temple of the Dragon King group well logging-earthquake joint hydrocarbon index inverting fluid identification is ground,
Its idiographic flow is as follows：
（1）The parameters the such as when drilling fluid conductivity, temperature, gas survey and the brill that are recorded according to the field integrated logging in mill small stream area, meter
Calculate hydrocarbon index（Change rate when the hydrocarbonaceous amount of drilling fluid is based on boring, including total hydrocarbon index, methane index）, heavy hydrocarbon index（Except methane and
Heavy constituent outside ethane is with methane content ratio based on change rate when boring）Wait Logging curves, comparative analysis difference Logging curve
Fluid Sensitivity, the Logging curve of formation fluid property can be reflected with the relationship of formation fluid property and other by establishing it.Knot
Well logging, test data are closed, hydrocarbon index curve and the fluid identification effect of other Logging curves is analyzed, establishes Logging curve and the Dragon King
Relationship between the group reservoir fluid-filled property matter of mausoleum.Itself the result shows that total hydrocarbon index, conductivity, humidity index for grind the small stream area Dragon King
Mausoleum group fluid identification has certain effect, and total hydrocarbon index is especially prominent for identification mill small stream area Temple of the Dragon King group Gas-Water Contant effect.Fig. 2
MX203 wells Temple of the Dragon King group logging explanation figure, test result show three Reservoir Sections of the well be respectively gassiness water layer, water layer,
Water layer shows as the water layer feature of total hydrocarbon index reduction on total hydrocarbon exponential curve, sensitive to fluid properties reflection, and other
Some well loggings, log reflection is be not as sensitive as its.
（2）Mo Xi blocks Temple of the Dragon King set constructor main body section reservoir is based on gassiness, but regional area is there are water layer, these
Local water layer is likely to be at air water intermediate zone.According to its geology characteristic, targetedly preferably go out instantaneous frequency, instantaneous Q values etc.
Seismic properties and original earthquake data to water saturation sensitivity are originally inputted number as the more attribution inversions of total hydrocarbon index
According to.
（3）Load the fluid sensitives earthquake category such as well logging total hydrocarbon exponential curve and the instantaneous frequency, the instantaneous Q values that preferably go out
Property.Using these seismic datas and its seismic properties progress attribute, parameter are derived from preferably with regression fit, establish interval of interest record
The multivariate statistics relationship between seismic properties of well total hydrocarbon exponential curve.Since exceptional value preferably intends more attributes with more attributes
It closes to return and has larger impact, more attribute fit procedures need rejecting abnormalities value to influence, and reduce the influence of exceptional value.
（4）Utilize the more relations on attributes established, inverting mill small stream area Temple of the Dragon King group total hydrocarbon index, to inverting total hydrocarbon index
Profile change trend, well effect is analyzed.If profile change trend is reasonable, good to well effect, the inversion result is approved,
Otherwise it rejects and re-starts the preferred fitting of more attributes and inverting again after attribute is adversely affected to inversion result.Fig. 4-7 is mill
The total hydrocarbon index inverting section of the small stream area Temple of the Dragon King 2 mouthfuls of wells of group, as can be seen from the figure inverting total hydrocarbon index profile variation tendency
Rationally, gas-bearing formation section total hydrocarbon index increases, water layer section total hydrocarbon index reduces, which has preferable differentiation for fluid properties
Effect.
（5）It is preferred that window section when reasonable, extracts interval of interest total hydrocarbon index, utilizes total hydrocarbon exponential forecasting interval of interest fluidity
Matter planar distribution.Fig. 8 is Reservoir Section total hydrocarbon exponential forecasting plan view under the Temple of the Dragon King, and total hydrocarbon index height illustrates gassiness possibility height,
The low aqueous possibility of explanation of total hydrocarbon index is big, meets preferably with actual test data.
The case study of mill small stream area Temple of the Dragon King group well logging-earthquake joint total hydrocarbon index inverting shows that the technological invention can
Total hydrocarbon index has successfully been finally inversed by using seismic data, there are better effects for fluid identification of reservoir, to thin reservoir, air water mistake
Preferable effect can be played by crossing the fluid identification of reservoir of band.
Claims (6)
1. hydrocarbon index inverting Fluid Identification Method is combined in a kind of well logging earthquake, it is characterised in that step is as follows：
（1）Parameter when surveying and bore using the drilling fluid conductivity, temperature, gas of situ of drilling well comprehensive logging instrument record calculates hydrocarbon and refers to
Number, heavy hydrocarbon index well logging hydrocarbon index curve, the Fluid Sensitivity of comparative analysis difference curve establish hydrocarbon index and formation fluid
The relationship of matter；
（2）It is preferably right with reference to well logging fluid interpretation results, well logging fluid interpretation results, test achievement according to geologic characteristics
Study the fluid sensitive seismic properties in area；
（3）Loading well logging hydrocarbon index curve and the fluid sensitive seismic properties preferably gone out, are carried out using multi-attribute analysis technology
Attribute optimization combines and parameter is preferred, establishes interval of interest fluid sensitive seismic properties and more attributes of well logging hydrocarbon index curve close
System；
（4）According to multiple more relations on attributes between the well logging hydrocarbon index curve and seismic data being fitted, it is finally inversed by different hydrocarbon
Exponent data body, analyze each inverting hydrocarbon index body to well effect, preferably go out the preferable hydrocarbon index invertomer to well effect, in advance
Survey the fluid level spread of body prediction target zone.
2. a kind of well logging earthquake joint hydrocarbon index inverting Fluid Identification Method according to claim 1, it is characterised in that：Institute
The hydrocarbon index stated refers to the hydrocarbonaceous amount of drilling fluid based on change rate when boring, including total hydrocarbon index and methane index.
3. a kind of well logging earthquake joint hydrocarbon index inverting Fluid Identification Method according to claim 1, it is characterised in that：Institute
The heavy hydrocarbon index stated refers to heavy constituent in addition to methane and ethane with methane content ratio based on change rate when boring.
4. a kind of well logging earthquake joint hydrocarbon index inverting Fluid Identification Method according to claim 1, it is characterised in that：Institute
It states and frequency class seismic properties, attenuation class seismic properties and amplitude class earthquake is mainly included to the seismic properties for studying area's fluid sensitive
Attribute.
5. a kind of well logging earthquake joint hydrocarbon index inverting Fluid Identification Method according to claim 1, it is characterised in that：Institute
State step（3）In, the influence of multi-attribute analysis process rejecting abnormalities value.
6. a kind of well logging earthquake joint hydrocarbon index inverting Fluid Identification Method according to claim 5, it is characterised in that：Institute
State step（3）In, establish multiple more relations on attributes.
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