CN106593425A - Method and device for identifying reservoir water top position and fluid type - Google Patents
Method and device for identifying reservoir water top position and fluid type Download PDFInfo
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 136
- 238000000034 method Methods 0.000 title claims abstract description 63
- 239000012530 fluid Substances 0.000 title claims abstract description 34
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- 239000008398 formation water Substances 0.000 claims abstract description 32
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- 230000005611 electricity Effects 0.000 claims description 6
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- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
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Abstract
The embodiment of the application provides a method and a device for identifying the position of a water top of a reservoir and the type of fluid. The method for identifying the water top comprises the following steps: obtaining effective porosity, electrical lithologic parameters, formation water resistivity and formation deep resistivity of a reservoir; obtaining the formation resistivity of the reservoir without oil and gas according to the effective porosity, the lithoelectric parameters and the formation water resistivity; and determining the water top position of the reservoir according to the stratum deep resistivity and the stratum resistivity. The accuracy of discerning the water top and discerning the fluid type can be improved to this application embodiment.
Description
Technical field
The application is related to In Oil Field Exploration And Development technical field, more particularly, to a kind of identification reservoir Shui Ding positions, fluid class
The method and device of type.
Background technology
Fluid type of reservoir through is accurately identified, is one of most important job content in Log Interpretation.Identification reservoir stream
Body type can include：The position and identification oily bottom position on identification pure water top.Mainly pass through water saturation in prior art
Threshold method recognizes fluid type of reservoir through.The process of the method is：Stratum water saturation is calculated first with Archie formula, then
Determine in oil reservoir corresponding to the water saturation threshold value of the water saturation threshold value of unified oil reservoir and water layer, oil reservoir and water layer
Depth be exactly oily bottom and water top position.By the water saturation of oil reservoir and water layer in reservoir water saturation numerical value and oil reservoir
Threshold value is compared, so as to identify the fluid type of reservoir.
But due to the aspects such as RESERVOIR PORE STRUCTURE, irreducible water saturation and oil property (heavy oil and light oil) have can
Can be different, cause that there is uncertainty with unified water saturation threshold value identification fluid type.If effectively can not recognize
Reservoir type, can not especially accurately identify oil reservoir and oil-water common-layer interface, frequently can lead to intermediate zone and divide long, so as to lead
Result of log interpretation is caused to be unable to the consequence of scientific guidance oil-gas mining.
The content of the invention
The purpose of the embodiment of the present application is to provide a kind of identification reservoir Shui Ding positions, the method and device of fluid type,
The accuracy of identification water top and identification fluid type can be improved.
It is that, up to above-mentioned purpose, the embodiment of the present application provides a kind of method of identification reservoir Shui Ding positions.Methods described bag
Include：
Obtain effecive porosity, litho-electric parameters, formation water resistivity and the ground layer depth resistivity of reservoir；
According to the effecive porosity, the litho-electric parameters and the formation water resistivity, obtain the reservoir and do not contain
Formation resistivity during oil gas；
According to described ground layer depth resistivity and the formation resistivity, the Shui Ding positions of the reservoir are determined.
The embodiment of the present application additionally provides the device of a species reservoir Shui Ding positions.Described device includes：
Acquisition module, for obtaining effecive porosity, litho-electric parameters, formation water resistivity and the ground layer depth resistance of reservoir
Rate；
Formation resistivity acquisition module, for according to the effecive porosity, the litho-electric parameters and the stratum water
Resistivity, obtain the reservoir not oily when formation resistivity；
Water top acquisition module, for according to described ground layer depth resistivity and the formation resistivity, determining the reservoir
Shui Ding positions.
The technical scheme provided from above-mentioned the embodiment of the present application, the embodiment of the present application provide a kind of based on resistivity
The method on the water top in the identification fluid of log.The method is first according to effecive porosity, litho-electric parameters and stratum water
Resistivity, obtain the reservoir not oily when formation resistivity；Further according to described ground layer depth resistivity and stratum electricity
Resistance rate, determines the Shui Ding positions of the reservoir.The identification Shui Ding positions of the method are based on the data that well logging is produced, and are different from
The method on water saturation lower limit identification water top unified used in prior art, can improve the accuracy of water top identification.
On the other hand, the method for a kind of identification fluid type of reservoir through that the embodiment of the present application is also provided, the method include：Know
The method of other Shui Ding positions and the method at the oily bottom of identification.Wherein, the method for the identification Shui Ding positions includes：
Obtain effecive porosity, litho-electric parameters, formation water resistivity and the ground layer depth resistivity of reservoir；
According to the effecive porosity, the litho-electric parameters and the formation water resistivity, obtain the reservoir and do not contain
Formation resistivity during oil gas；
According to described ground layer depth resistivity and the formation resistivity, the Shui Ding positions of the reservoir are determined.
The embodiment of the present application additionally provides a kind of device of identification fluid type of reservoir through, including：The dress of identification Shui Ding positions
Put and recognize the device at oily bottom.Wherein, the device of the identification Shui Ding positions includes：
Acquisition module, for obtaining effecive porosity, litho-electric parameters, formation water resistivity and the ground layer depth resistance of reservoir
Rate；
Formation resistivity obtains module, for according to the effecive porosity, the litho-electric parameters and the stratum water
Resistivity, obtain the reservoir not oily when formation resistivity；
Water top determining module, for according to described ground layer depth resistivity and the formation resistivity, determining the reservoir
Shui Ding positions.
The technical scheme provided from the embodiment of above-mentioned identification fluid type of reservoir through, in this section in embodiment,
The approach application on the water top in the identification fluid based on Resistivity log has been arrived in identification fluid type of reservoir through.Based on electricity
The water top accuracy identified by resistance rate log is higher, so as to further increase the accurate of fluid type of reservoir through identification
Property.
Description of the drawings
Accompanying drawing described herein is used for providing further understanding the embodiment of the present application, constitutes the embodiment of the present application
A part, does not constitute the restriction to the embodiment of the present application.In the accompanying drawings：
Method flow schematic diagrams of the Fig. 1 for the identification water top of the embodiment of the present application；
Schematic devices of the Fig. 2 for the identification water top of the embodiment of the present application；
Log, R of the Fig. 3 for the well A of the embodiment of the present application0Curve and resistivity ratio curve；
Method schematic diagrams of the Fig. 4 for the oily bottom of identification of the embodiment of the present application；
Log and R of the Fig. 5 for the well B of the embodiment of the present applicationtxCurve；
Log, R of the Fig. 6 for the embodiment of the present applicationtxCurve and RtoCurve.
Specific embodiment
Purpose, technical scheme and advantage to make the embodiment of the present application becomes more apparent, with reference to embodiment and attached
Figure, is described in further details to the embodiment of the present application.Here, the schematic description and description of the embodiment of the present application is used for
The embodiment of the present application is explained, but is not intended as the restriction to the embodiment of the present application.
Below in conjunction with the accompanying drawings, the specific embodiment of the embodiment of the present application is described in further detail.
With reference to shown in Fig. 1, a kind of method of identification reservoir Shui Ding positions that the embodiment of the present application is provided can include with
Lower step.Methods described can be used for the position for recognizing water top in reservoir.Wherein, the water top can be in same oil-water system
The highest depth of the pure water position of reservoir, i.e. top.In Effective Reservoirs, it is water layer below Shui Ding positions, Shui Ding more than position is
Oil-water common-layer or oil reservoir.Described in each embodiment of the application, reservoir is Effective Reservoirs, i.e., from reservoir to be identified
Eliminate the non-reservoir such as mud stone and tight formation.
Step S101, obtains effecive porosity, litho-electric parameters, formation water resistivity and the ground layer depth resistivity of reservoir.
The effecive porosity can be the ratio of the volume of the hole and the total volume of rock interconnected in rock.Generally
The effecive porosity can be calculated by log data.Specifically, can be by curve meters such as sound wave, neutron and density
Calculation obtains effecive porosity.The litho-electric parameters can include：Lithology factor a, lithology factor b, cementation factor m and saturation
Index n.Although lithology factor a and lithology factor b referred to as lithology factors, different implications are represented respectively in well logging field.
In each embodiment of the application, used lithology factor can refer in particular to the rock parameter a in below equation.
In above formula, F represents formation factor；R0And RWRock resistivity when representing that reservoir water saturation is 100% respectively
And formation water resistivity；M represents the cementation factor in litho-electric parameters.
The litho-electric parameters can be obtained by rock-electric test.In the present embodiment, the litho-electric parameters can include rock
Property coefficient a and cementation factor m, therefore the litho-electric parameters for obtaining reservoir can be acquisition lithology factor a and cementation factor
m.Described ground layer depth resistivity can be the resistivity of reservoir undisturbed formation, can be obtained by logging well.The stratum water resistance
Rate can be contained stratum resistivity of water in reservoir, can be obtained by testing.
Step S102, according to the effecive porosity, the litho-electric parameters and the formation water resistivity, obtains described
Reservoir not oily when formation resistivity.
The reservoir in the formation resistivity ideally of not oily for the reservoir water saturation can be
Formation resistivity when 100%.
In the application one embodiment, when S102 is embodied as, can be calculated by the deformation formula of Archie formula
Obtain formation resistivity of the reservoir in the case of water saturation is 100%.Specifically, can be by the active porosity
Degree, the litho-electric parameters and the formation water resistivity, substitution below equation are calculated stratum during the not oily
Resistivity.When substitute into be continuous effecive porosity curve and formation water resistivity curve when, can obtain in the reservoir
Formation resistivity curve when water saturation is 100%.
In formula, R0Formation resistivity when expression is 100% containing water saturation；RWRepresent formation water resistivity；POR is indicated
Effect porosity；A represents the lithology factor in litho-electric parameters；M represents the cementation factor in litho-electric parameters.
Step S103, according to described ground layer depth resistivity and the formation resistivity, determines the Shui Ding positions of the reservoir.
In one embodiment of the application, when S103 is embodied as, by described ground layer depth resistivity and stratum electricity
Resistance rate substitutes into below equation, obtains resistivity superimposed curves.The ground layer depth electricity that described ground layer depth resistivity can be obtained to log well
Resistance rate curve, the formation resistivity can be formation resistivity curve of the water saturation obtained by S102 when being 100%.
Rto=Log (Rt/R0)
In formula, RtoRepresent resistivity superimposed curves；RtRepresent ground layer depth resistivity.
It is in same oil-water system, all to meet RtoMost shallow depth in=0 depth, is exactly the Shui Ding positions.Example
Such as, the depth at well head be 0, the downward depth of well head increases successively, in the same oil-water system of certain a bite well, from depth 50m to
R is met between 80mto=0, therefore, the water top at this is at most shallow depth 50m.
When oily in reservoir, RtMore than R0, RtoThe value of curve be on the occasion of.Meanwhile, RtoThe size of numerical value reflects oil
The height of Gas content.In pure water layer, Rt=R0, then have Rto=0, therefore RtoPosition corresponding to=0 is exactly water layer, therefore
It is in same oil-water system, all to meet RtoMost shallow depth in=0 depth, is exactly the Shui Ding positions.Shui Ding positions correspondence
It is pure water layer under depth, is oil reservoir, oil-water common-layer or gas-bearing formation on the correspondence depth of Shui Ding positions.Now, reuse routine
Oil-gas Layer Fluid Identification Method can distinguish oil-yielding stratum, oil-water common-layer and gas-bearing formation.
Knowable to embodiment as shown in Figure 1, a kind of identification water top based on Resistivity log is present embodiments provided
The method of position.The method obtains the reservoir and does not contain first according to effecive porosity, litho-electric parameters and formation water resistivity
Formation resistivity during oil gas；According to described ground layer depth resistivity and the formation resistivity, the water top of the reservoir is determined
Position.The identification Shui Ding positions of the method are based on the data that well logging is produced, and contain different from unified used in prior art
The method on water saturation lower limit identification water top, can improve the accuracy of water top identification.
A kind of device of identification reservoir Shui Ding positions is additionally provided in the embodiment of the present application, as described in the following examples.
As the principle of the device solve problem is similar to a kind of method of identification reservoir Shui Ding positions, therefore the enforcement of the device can be with
Referring to a kind of enforcement of the method for identification reservoir Shui Ding positions, repeat part and repeat no more.
As shown in Fig. 2 a kind of device of identification reservoir Shui Ding positions provided by the embodiment of the present application can include it is following
Several modules.
Acquisition module 201, for obtaining effecive porosity, litho-electric parameters, formation water resistivity and the ground layer depth of reservoir
Resistivity.
Formation resistivity acquisition module 202, for according to the effecive porosity, the litho-electric parameters and the stratum
Water resistance rate, obtain the reservoir not oily when formation resistivity.
Water top acquisition module 203, for according to described ground layer depth resistivity and the formation resistivity, determining the reservoir
Shui Ding positions.
From the device embodiment of above-mentioned other reservoir Shui Ding positions, present embodiments provide a kind of based on resistivity logging
The device of the identification Shui Ding positions of curve.First according to effecive porosity, litho-electric parameters and formation water resistivity, obtain described
Reservoir not oily when formation resistivity；According to described ground layer depth resistivity and the formation resistivity, the storage is determined
The Shui Ding positions of layer.Device identification Shui Ding positions are based on the data that well logging is produced, different from uniting used in prior art
The method on one water saturation lower limit identification water top, can improve the accuracy of water top identification.
In one embodiment of the application, a kind of method of identification fluid type of reservoir through, methods described bag are additionally provided
Include：The method of identification Shui Ding positions and the method for identification oily bottom position.Wherein, the method for the identification Shui Ding positions may be referred to
Shown in Fig. 1.
In the present embodiment, the approach application on the water top in the identification fluid based on Resistivity log identification has been arrived into
In fluid type of reservoir through.The water top accuracy identified based on Resistivity log is higher, so as to further increase
The accuracy of fluid type of reservoir through identification.
In a specific embodiment of the application, the Shui Ding positions of reservoir in well A are recognized using method shown in Fig. 1.Fig. 3
It is log, the R of well A0Curve and resistivity ratio curve.In Fig. 3, four road of the left side is Logging Curves, from left to right
It is gamma ray curve, depth, resistivity curve and 3 porosity logging curves (neutron, interval transit time and close successively
Degree)；5th road is formation resistivity R of calculated water saturation when being 100%0Curve；6th road is resistivity weight
Folded curve Rto。
In Fig. 3, RtoDuring ＞ 0, represent that oil gas is present, reservoir is oil reservoir or oil-water common-layer；RtoWhen=0, it is water layer.Together
In one oil-water system, Rto=0 extreme higher position (i.e. most shallow depth), is pure water top position, is water layer below the position, the position
It is oil-water common-layer or oil reservoir above.
In the present embodiment, first according to effecive porosity, litho-electric parameters and formation water resistivity, obtain the reservoir
Not formation resistivity during oily；According to described ground layer depth resistivity and the formation resistivity, the reservoir is determined
Shui Ding positions.The identification Shui Ding positions of the method are based on the data that well logging is produced, different from unified used in prior art
Water saturation lower limit identification water top method, the accuracy of water top identification can be improved.
Fig. 4 is a kind of method schematic diagram at the oily bottom of identification.In another kind of embodiment of the application, bored using fresh water mud
Well liquid drilling well, now meets in the water layer of reservoir in mud increased resistance invasion, i.e. water layer, and flushed zone resistivity is higher than formation resistivity.
After using method identification water outlet top as shown in Figure 1, the oily bottom position in reservoir can also be recognized by step as shown in Figure 4
Put.
Step S401, obtains the flushed zone resistivity of the reservoir.
The flushing strip resistance can be obtained by logging well.
Step S402, according to described ground layer depth resistivity, the effecive porosity and the flushed zone resistivity, obtains
The oily bottom position of the reservoir.
In one embodiment of the application, by described ground layer depth resistivity, the effecive porosity and the flushed zone
Resistivity substitutes into below equation, obtains resistivity ratio curve,
Rtx=In (Rt/RXO)×POR/10
In formula, RtxRepresent resistivity ratio curve；RXORepresent flushed zone resistivity.
It is in same oil-water system, all to meet RtxMost deep degree in=0 depth, is exactly the oily bottom position.
In the present embodiment, in oil reservoir, Rt＞ Rxo, then have Rtx＞ 0.In water layer or oil-water common-layer, Rt≤Rxo, then have
Rtx≤0.Therefore, Rtx=0 depth, is exactly the position of oil reservoir, therefore, in same oil-water system, meet Rtx=0 it is most deep
Degree, is exactly the oily bottom position.More than oily bottom depth it is net pay zone, is oil-water common-layer or water layer below.RtxNumerical value is bigger,
R is illustrated thentWith RxoSeparation is more obvious, and slurry compounding effect is stronger, and reservoir permeability is higher.
Meanwhile, in the present embodiment, effecive porosity in formula, being further comprises, this aspect can be by non-reservoir (POR
=0) foreclose；On the other hand, can be in RtxReservoir properties information is introduced in curve.
In the present embodiment, on the basis of based on resistivity curve identification Shui Ding positions, it is also based on resistivity survey
The position at the oily bottom in well Curves Recognition fluid.The standard of oily bottom identification is improve while water top location recognition accuracy is improved
True property, so as to further increase the accuracy of fluid type identification.
In one embodiment of the application, resistivity ratio curve (R is can be used alonetxCurve) identification reservoir oil
Bottom position, now, the foundation at the oily bottom of identification is flushed zone resistivity and ground layer depth resistivity that well logging is obtained, can improve identification
The accuracy at oily bottom.
In a specific embodiment of the application, using the drilled well B of fresh water mud, therefore in water layer, mud is high in well B
Invade, can now use resistivity ratio curve (RtxCurve) identification well B in reservoir oily bottom position.Fig. 5 is that the well logging of well B is bent
Line and RtxCurve.In Fig. 5, four road of the left side is Logging Curves, is gamma ray curve, depth, resistance from left to right successively
Rate curve and 3 porosity logging curves (neutron, interval transit time and density)；5th road is calculated resistivity ratio
Value curve (RtxCurve).
In Fig. 5, Rtx＞ 0 is net pay zone；Rtx≤ 0 is water layer or oil-water common-layer.In same oil-water system, Rtx=0 most
It is deep to spend, it is exactly oily bottom position.More than the position it is oil reservoir, is oil-water common-layer or water layer below.
In the present embodiment, when the resistivity of drilling fluid in the water layer of reservoir is more than formation water resistivity, using RtxIt is bent
Line identification oily bottom position, R in same oil-water systemtxPosition of=0 most deep degree with regard to correspondence oil bottom.
In a specific embodiment of the application, reservoir to be studied is located at Iraq's Haffa Asia oil field.Haffa Asia oil field
Several reservoir formation water resistance rates under 0.02ohmm or so, reservoir condition, bore by mud filtrate resistivity be 0.04～
0.06ohmm, in oil reservoir pure water layer, mud increased resistance invasion.The identification Shui Ding positions provided by the embodiment of the present application and oily bottom position
Method amount to 113 mouthfuls of wells (secondary) in the oil field and carried out fluid type identification, in different oil reservoirs, can accurately identify
Shui Ding and oily bottom position, so as to accurately divide oil reservoir, oil-water common-layer and water layer.
In certain a bite well of Haffa Asia oil field Mishrif oil reservoirs, comprehensive RtxCurve and RtoCurve carries out reservoir fluid class
Type is recognized.Fig. 6 is the log of the well, RtxCurve and RtoCurve.In Fig. 6, four road of the left side is Logging Curves, from a left side
To the right side be successively gamma ray curve, depth, resistivity curve and 3 porosity logging curves (neutron, interval transit time and
Density)；5th road is formation resistivity R of calculated water saturation when being 100%0Curve；6th road is resistivity
Superimposed curves (RtoCurve)；7th road is resistivity ratio curve (RtxCurve)；8th road is integrated interpretation conclusion.
Two sets of oil-water systems are contained shown in Fig. 6, well section is 3335～3368m and 3377～3404m respectively.Basis first
RtoCurve, determines the Shui Ding positions of two sets of oil-water systems, respectively at 3351.6 meters and 3399 meters；Further according to RtxCurve, really
The oily bottom position of fixed two sets of oil-water systems, respectively at 3340.8 meters and 3396 meters.It is water layer below water top, oily bottom is with upper
Oil reservoir, is oil-water common-layer (intermediate zone) between Shui Ding and oily bottom.According to the conclusion of the method, 88,91,92 3 layers of integrated interpretation is
Oil reservoir；90th, 94 two-layers are water layer；89th, 93 two-layers are oil-water common-layer.Explain that conclusion is good with production result concordance.
In the present embodiment, comprehensive RtxCurve and RtoCurves Recognition has gone out oily bottom and water top, and with this divided oil reservoir,
Water layer and oil-water common-layer, it is achieved thereby that the purpose of identification fluid type.In the present embodiment, based on Resistivity log
The Shui Ding of identification and oily bottom, with comparing with the method at oily bottom using unified water saturation lower limit identification Shui Ding, recognize knot
Fruit is more accurate.
A kind of device of identification fluid type of reservoir through is additionally provided in the embodiment of the present application, including：Identification Shui Ding positions
Device and the device at the oily bottom of identification.Wherein, recognize that the device on water top is may be referred to shown in Fig. 2.Due to the device solve problem
Principle is similar to a kind of method of identification fluid type of reservoir through, therefore the enforcement of the device may refer to a kind of identification reservoir fluid
The enforcement of the method for type, repeats part and repeats no more.
The step of method described in the embodiment of the present application, can be directly embedded into the software mould of hardware, computing device
Block or the combination of both.Software module can be stored in RAM memory, flash memory, ROM memory, eprom memory,
In eeprom memory, depositor, hard disk, moveable magnetic disc, CD-ROM or this area in other any form of storage media.
Exemplarily, store medium to be connected with processor, so that processor can read information from storage medium, it is possible to
Write information is deposited to storage medium.Alternatively, store medium to be integrated in processor.Processor and storage medium can set
It is placed in ASIC, ASIC can be arranged in user terminal.Alternatively, processor and storage medium can also be arranged at user's end
In different part in end.
In one or more exemplary designs, the above-mentioned functions described by the embodiment of the present application can be in hardware, soft
The combination in any of part, firmware or this three is realizing.If realized in software, these functions can be stored and computer-readable
On medium, or it is transmitted on the medium of computer-readable with one or more instructions or code form.Computer readable medium includes electricity
Brain stores medium and is easy to so that allowing computer program to be transferred to other local telecommunication medias from a place.Storage medium can be with
It is that any general or special computer can be with the useable medium of access.For example, such computer readable media can include but
RAM, ROM, EEPROM, CD-ROM or other optical disc storages, disk storage or other magnetic storage devices are not limited to, or other are appointed
What can be used for carrying or store with instruct or data structure and other can be by general or special computer or general or special handling
Device reads the medium of the program code of form.Additionally, any connection can be properly termed computer readable medium, example
Such as, if software is by a coaxial cable, fiber optic cables, double from web-site, server or other remote resources
Twisted wire, Digital Subscriber Line (DSL) or with the wireless way for transmitting such as example infrared, wireless and microwave be also contained in it is defined
In computer readable medium.Described video disc (disk) and disk (disc) are including Zip disk, radium-shine disk, CD, DVD, floppy disk
And Blu-ray Disc, disk is generally with magnetic duplication data, and video disc generally carries out optical reproduction data with laser.Combinations of the above
Can also be included in computer readable medium.
Particular embodiments described above, the purpose, technical scheme and beneficial effect to the application have been carried out further in detail
Describe bright, the be should be understood that specific embodiment that the foregoing is only the embodiment of the present application in detail, be not used to limit this Shen
Protection domain please, all any modification, equivalent substitution and improvements within spirit herein and principle, done etc., all should wrap
It is contained within the protection domain of the application.
Claims (12)
1. a kind of method of identification reservoir Shui Ding positions, it is characterised in that methods described includes：
Obtain effecive porosity, litho-electric parameters, formation water resistivity and the ground layer depth resistivity of reservoir；
According to the effecive porosity, the litho-electric parameters and the formation water resistivity, the reservoir not oily is obtained
When formation resistivity；
According to described ground layer depth resistivity and the formation resistivity, the Shui Ding positions of the reservoir are determined.
2. the method for claim 1, it is characterised in that the reservoir not oily when formation resistivity be the storage
Formation resistivity when layer water saturation is 100%.
3. method as claimed in claim 2, it is characterised in that according to the effecive porosity, the litho-electric parameters and institute
Formation water resistivity is stated, obtaining the formation resistivity when reservoir water saturation is 100% includes：
The effecive porosity, the litho-electric parameters and the formation water resistivity are substituted into into below equation, institute is calculated
Formation resistivity when water saturation is 100% is stated,
In formula, R0Formation resistivity when representing that reservoir water saturation is 100%；RWRepresent formation water resistivity；POR is represented
Effecive porosity；A represents the lithology factor in litho-electric parameters；M represents the cementation factor in litho-electric parameters.
4. method as claimed in claim 3, it is characterised in that described according to described ground layer depth resistivity and the formation resistivity
Rate, determines that the Shui Ding positions of the reservoir are specially：
Described ground layer depth resistivity and the formation resistivity are substituted into into below equation, resistivity superimposed curves are obtained,
Rto=Log (Rt/R0)
In formula, RtoRepresent resistivity superimposed curves；RtRepresent ground layer depth resistivity；
In same oil-water system, R is met by alltoMost shallow depth in=0 depth, the water being identified as in the oil-water system
Top position.
5. a kind of device of identification reservoir Shui Ding positions, it is characterised in that described device includes：
Acquisition module, for obtaining effecive porosity, litho-electric parameters, formation water resistivity and the ground layer depth resistivity of reservoir；
Formation resistivity acquisition module, for according to the effecive porosity, the litho-electric parameters and the stratum water resistance
Rate, obtain the reservoir not oily when formation resistivity；
Water top acquisition module, for according to described ground layer depth resistivity and the formation resistivity, determining the water top of the reservoir
Position.
6. it is a kind of identification fluid type of reservoir through method, including：The method of identification Shui Ding positions and the method at the oily bottom of identification, which is special
Levy and be, the method for the identification Shui Ding positions includes：
Obtain effecive porosity, litho-electric parameters, formation water resistivity and the ground layer depth resistivity of reservoir；
According to the effecive porosity, the litho-electric parameters and the formation water resistivity, the reservoir not oily is obtained
When formation resistivity；
According to described ground layer depth resistivity and the formation resistivity, the Shui Ding positions of the reservoir are determined.
7. method as claimed in claim 6, it is characterised in that the reservoir not oily when formation resistivity be the storage
Formation resistivity when layer water saturation is 100%.
8. method as claimed in claim 7, it is characterised in that according to the effecive porosity, the litho-electric parameters and institute
Formation water resistivity is stated, obtaining the formation resistivity when reservoir water saturation is 100% includes：
The effecive porosity, the litho-electric parameters and the formation water resistivity are substituted into into below equation, institute is calculated
Formation resistivity when water saturation is 100% is stated,
In formula, R0Formation resistivity when representing that reservoir water saturation is 100%；RWRepresent formation water resistivity；POR is represented
Effecive porosity；A represents the lithology factor in litho-electric parameters；M represents the cementation factor in litho-electric parameters.
9. method as claimed in claim 8, it is characterised in that described according to described ground layer depth resistivity and the formation resistivity
Rate, determine the Shui Ding positions of the reservoir specifically,
Described ground layer depth resistivity and the formation resistivity are substituted into into below equation, resistivity superimposed curves are obtained,
Rto=Log (Rt/R0)
In formula, RtoRepresent resistivity superimposed curves；RtRepresent ground layer depth resistivity；
In same oil-water system, R is met by alltoMost shallow depth in=0 depth, the water being identified as in the oil-water system
Top position.
10. method as claimed in claim 9, it is characterised in that when mud increased resistance invasion is met in the water layer of the reservoir, described
The method of identification oily bottom position includes：
Obtain the flushed zone resistivity of the reservoir；
According to described ground layer depth resistivity, the effecive porosity and the flushed zone resistivity, the oil of the reservoir is obtained
Bottom position.
11. methods as claimed in claim 10, it is characterised in that described according to described ground layer depth resistivity, effective hole
Porosity and the flushed zone resistivity, the oily bottom position for obtaining the reservoir are specially：
By described ground layer depth resistivity, the effecive porosity and flushed zone resistivity substitution below equation, electricity is obtained
Resistance rate ratio curve,
Rtx=In (Rt/RXO)×POR/10
In formula, RtxRepresent resistivity ratio curve；RXORepresent flushed zone resistivity；
In same oil-water system, R is met by alltxMost deep degree in=0 depth, the oil being identified as in the oil-water system
Bottom position.
A kind of 12. devices of identification fluid type of reservoir through, including：The device of identification Shui Ding positions and the device at the oily bottom of identification, its
It is characterised by, wherein the device of the identification Shui Ding positions includes：
Acquisition module, for obtaining effecive porosity, litho-electric parameters, formation water resistivity and the ground layer depth resistivity of reservoir；
Formation resistivity obtains module, for according to the effecive porosity, the litho-electric parameters and the stratum water resistance
Rate, obtain the reservoir not oily when formation resistivity；
Water top determining module, for according to described ground layer depth resistivity and the formation resistivity, determining the water top of the reservoir
Position.
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